[Commits] Rev 3569: Merge 5.5 -> 5.5-mwl248. in file:///home/igor/maria/maria-5.5-mwl248-merge/

Igor Babaev igor at askmonty.org
Sat Nov 3 05:38:15 EET 2012


At file:///home/igor/maria/maria-5.5-mwl248-merge/

------------------------------------------------------------
revno: 3569 [merge]
revision-id: igor at askmonty.org-20121103033805-k8ljjjflkoerlef4
parent: wlad at montyprogram.com-20121102094352-vku8sp2ddp4v9bnc
parent: igor at askmonty.org-20120912223303-m4fomuxpo7ekf4og
committer: Igor Babaev <igor at askmonty.org>
branch nick: maria-5.5-mwl248-merge
timestamp: Fri 2012-11-02 20:38:05 -0700
message:
  Merge 5.5 -> 5.5-mwl248.
added:
  mysql-test/include/have_stat_tables.inc have_stat_tables.inc-20120508234143-azrzj42c6oz057l4-1
  mysql-test/include/have_stat_tables.opt have_stat_tables.opt-20120508234149-vd8puj6428drqm87-1
  mysql-test/include/world_schema_utf8.inc world_schema_utf8.in-20120105014458-33pwk5n6atf6eg9e-1
  mysql-test/r/mdev-504.result   mdev504.result-20120903180145-bms0iez3rek407x1-1
  mysql-test/r/stat_tables.result stat_tables.result-20120412000601-7iswj0l4x6s2s1zb-1
  mysql-test/r/stat_tables_disabled.result stat_tables_disabled-20120902063717-ywhqjlm3po5httf2-1
  mysql-test/r/stat_tables_innodb.result stat_tables_innodb.r-20120412000617-dvyhjropgkzk1zlo-1
  mysql-test/r/stat_tables_par.result stat_tables_par.resu-20120728000851-cll7v2isk42bmxfw-1
  mysql-test/r/stat_tables_par_innodb.result stat_tables_par_inno-20120728000859-w0erl19kts1av58r-1
  mysql-test/r/stat_tables_rbr.result stat_tables_rbr.resu-20120820182628-m0qfhgr2bly4d475-1
  mysql-test/r/stat_tables_repl.result stat_tables_repl.res-20120911050626-wevkyv8tq1uh5hyx-1
  mysql-test/r/statistics.result statistics.result-20120105014411-jlbjdb9lxhibpzx9-1
  mysql-test/suite/pbxt/         pbxt-20090402100035-4ilk9i91sh65vjcb-1
  mysql-test/suite/pbxt/r/       r-20090402100035-4ilk9i91sh65vjcb-2
  mysql-test/suite/sys_vars/r/use_stat_tables_basic.result optimizer_use_stat_t-20120319045735-6692ncq12uaqn7sz-1
  mysql-test/suite/sys_vars/t/use_stat_tables_basic.test optimizer_use_stat_t-20120319045721-5qr081k3gwu1njt2-1
  mysql-test/t/mdev-504.test     mdev504.test-20120903180145-bms0iez3rek407x1-2
  mysql-test/t/stat_tables.test  stat_tables.test-20120412000533-t6qjbbx4ckyso06e-1
  mysql-test/t/stat_tables_disabled.test stat_tables_disabled-20120902063704-bp9d7hgwbuyqdrze-1
  mysql-test/t/stat_tables_innodb.test stat_tables_innodb.t-20120412000548-u72mftbob0hpo0de-1
  mysql-test/t/stat_tables_par.test stat_tables_par.test-20120728000820-nlv2d9pp1cd08k20-1
  mysql-test/t/stat_tables_par_innodb.test stat_tables_par_inno-20120728000828-aig6a9fkzq35sy0t-1
  mysql-test/t/stat_tables_rbr.test stat_tables_rbr.test-20120820182616-5btzdsofvno8kysb-1
  mysql-test/t/stat_tables_repl.test stat_tables_repl.tes-20120911050608-sb0tgrzq2eczkxcw-1
  mysql-test/t/statistics.test   statistics.test-20120105014333-uudvumnzt086suj0-1
  sql/sql_statistics.cc          sql_statistics.cc-20120105014250-w88xzrlimyh8wdja-1
  sql/sql_statistics.h           sql_statistics.h-20120105014239-gk1bpgnidwenvbyj-1
modified:
  libmysqld/CMakeLists.txt       sp1f-cmakelists.txt-20060403082523-x3vxka3k56u2wpzwcrlpykznlz2akpxd
  mysql-test/include/system_db_struct.inc sp1f-system_db_struct.inc-20040310185404-feaci3dtov6s3atlmlpckccu6twe7qyu
  mysql-test/r/1st.result        sp1f-1st.result-20061121203254-kj44zxt4pu4qxuzi3xwg3vfirp5qm246
  mysql-test/r/connect.result    sp1f-connect.result-20021205110110-stxwtj2vtbhl6fx3xr6zans2byprrfhc
  mysql-test/r/information_schema.result sp1f-information_schema.r-20041113105544-waoxa2fjjsicturpothmjmi6jc3yrovn
  mysql-test/r/information_schema_all_engines.result information_schema_a-20090408133348-au36idguotknighe-2
  mysql-test/r/log_tables_upgrade.result log_tables_upgrade.r-20100226113701-8y0pnmu66veiv280-1
  mysql-test/r/mysql_upgrade.result sp1f-mysql_upgrade.result-20061113123947-wmzpg5cqviqzmxda3qnho2oqhz3t3qhs
  mysql-test/r/mysql_upgrade_ssl.result mysql_upgrade_ssl.re-20100811174650-puo1i7974wnihmp1-2
  mysql-test/r/mysqlcheck.result sp1f-mysqlcheck.result-20051018092453-6xc4m7ejwbivkyyfsddccepyg7iupgui
  mysql-test/r/mysqld--help.result mysqldhelp.result-20091210121810-wnsq93ex4gn8t8su-1
  mysql-test/r/status_user.result status_user.result-20091019051724-x1vmdm6cvmjlps1n-1
  mysql-test/r/system_mysql_db.result sp1f-system_mysql_db.resu-20040310185404-f7br5g4442iqwxireltudlyu5ppbkijo
  mysql-test/r/system_mysql_db_fix40123.result system_mysql_db_fix4-20120124204053-nm8ef122oxxki59h-2
  mysql-test/r/system_mysql_db_fix50030.result system_mysql_db_fix5-20120124204053-nm8ef122oxxki59h-3
  mysql-test/r/system_mysql_db_fix50117.result system_mysql_db_fix5-20120124204053-nm8ef122oxxki59h-4
  mysql-test/suite/funcs_1/r/is_columns_mysql.result sp1f-is_columns_mysql.res-20080307163304-a2ymkif2vzliwqqqzr22cglbaf75tthe
  mysql-test/suite/funcs_1/r/is_columns_mysql_embedded.result is_columns_mysql_emb-20080616171935-sl04j972o55obadv-7
  mysql-test/suite/funcs_1/r/is_key_column_usage.result sp1f-is_key_column_usage.-20080307163304-7dfvn5oow747a4vtwx564iiaozr3zw5r
  mysql-test/suite/funcs_1/r/is_statistics.result sp1f-is_statistics.result-20080307163304-m5utnb3asmvn24qpbivqzlypbjibrtqv
  mysql-test/suite/funcs_1/r/is_statistics_mysql.result sp1f-is_statistics_mysql.-20080307163304-2awiu4kn2q7xfqcbmeswtxujddo5vknw
  mysql-test/suite/funcs_1/r/is_statistics_mysql_embedded.result is_statistics_mysql_-20080616171935-sl04j972o55obadv-11
  mysql-test/suite/funcs_1/r/is_table_constraints.result sp1f-is_table_constraints-20080307163304-jvx2752aozu33xxg5exw5fqs7p764dhc
  mysql-test/suite/funcs_1/r/is_table_constraints_mysql.result sp1f-is_table_constraints-20080307163304-en63mch4nuqd22pkhbsqopivnkm2nsp6
  mysql-test/suite/funcs_1/r/is_table_constraints_mysql_embedded.result is_table_constraints-20080616171935-sl04j972o55obadv-12
  mysql-test/suite/funcs_1/r/is_tables_mysql.result sp1f-is_tables_mysql.resu-20080307163304-uuf3e2hr4j4mfefd7ticnk564tguxpnq
  mysql-test/suite/funcs_1/r/is_tables_mysql_embedded.result is_tables_mysql_embe-20080616171935-sl04j972o55obadv-15
  mysql-test/suite/perfschema/r/myisam_file_io.result myisam_file_io.resul-20100112014603-ubwjo2a0fk4thccy-59
  mysql-test/suite/perfschema/r/pfs_upgrade.result pfs_upgrade.result-20100305151912-rjb4zqubjg6gxnp5-2
  mysql-test/suite/perfschema/t/myisam_file_io.test myisam_file_io.test-20100112014603-ubwjo2a0fk4thccy-133
  mysql-test/t/system_mysql_db_fix40123.test sp1f-system_mysql_db_fix4-20061121143109-f4jyqcuzzrkf5bydpglx5wxlkvsw4szb
  mysql-test/t/system_mysql_db_fix50030.test sp1f-system_mysql_db_fix5-20061121164441-da6xh45o4bn5kgrrjls24zj4hi3rzwln
  mysql-test/t/system_mysql_db_fix50117.test sp1f-system_mysql_db_fix5-20070519165536-njxpqzdhrbkoihrqnbbix7xaezn2owqa
  scripts/mysql_system_tables.sql sp1f-mysql_system_tables.-20070226104923-4n5a67fuifobcyhhicfbacpsv5npohgv
  sql/CMakeLists.txt             sp1f-cmakelists.txt-20060831175237-esoeu5kpdtwjvehkghwy6fzbleniq2wy
  sql/field.cc                   sp1f-field.cc-19700101030959-f4imaofclsea3n4fj4ow5m7havmyxa2r
  sql/field.h                    sp1f-field.h-19700101030959-3n6smzxcwkjl7bikm3wg4hfkjn66uvvp
  sql/item_sum.cc                sp1f-item_sum.cc-19700101030959-4woo23bi3am2t2zvsddqbpxk7xbttdkm
  sql/multi_range_read.cc        multi_range_read.cc-20091222114932-4426uld8n8lgl6pq-1
  sql/mysqld.cc                  sp1f-mysqld.cc-19700101030959-zpswdvekpvixxzxf7gdtofzel7nywtfj
  sql/mysqld.h                   mysqld.h-20100331135644-cgcb6oowzqyx7fi3-11
  sql/opt_range.cc               sp1f-opt_range.cc-19700101030959-afe3wtevb7zwrg4xyibt35uamov5r7ds
  sql/sql_admin.cc               sql_table_maintenanc-20100813113324-ljhzawblfs477jro-2
  sql/sql_base.cc                sp1f-sql_base.cc-19700101030959-w7tul2gb2n4jzayjwlslj3ybmf3uhk6a
  sql/sql_base.h                 sql_base.h-20100331135644-cgcb6oowzqyx7fi3-12
  sql/sql_class.h                sp1f-sql_class.h-19700101030959-jnqnbrjyqsvgncsibnumsmg3lyi7pa5s
  sql/sql_db.cc                  sp1f-sql_db.cc-19700101030959-hyw6zjuisjyda5cj5746a2zzuzz5yibr
  sql/sql_delete.cc              sp1f-sql_delete.cc-19700101030959-ch2a6r6ushvc2vfwxt7ehcjuplelwthr
  sql/sql_join_cache.cc          sql_join_cache.cc-20091221012625-ipp8zu28iijhjmq2-1
  sql/sql_lex.cc                 sp1f-sql_lex.cc-19700101030959-4pizwlu5rqkti27gcwsvxkawq6bc2kph
  sql/sql_lex.h                  sp1f-sql_lex.h-19700101030959-sgldb2sooc7twtw5q7pgjx7qzqiaa3sn
  sql/sql_priv.h                 sp1f-mysql_priv.h-19700101030959-4fl65tqpop5zfgxaxkqotu2fa2ree5ci
  sql/sql_rename.cc              sp1f-sql_rename.cc-20000821000147-ltbepgfv52umnrkaxzycedl5p2tlr3fp
  sql/sql_select.cc              sp1f-sql_select.cc-19700101030959-egb7whpkh76zzvikycs5nsnuviu4fdlb
  sql/sql_show.cc                sp1f-sql_show.cc-19700101030959-umlljfnpplg452h7reeyqr4xnbmlkvfj
  sql/sql_table.cc               sp1f-sql_table.cc-19700101030959-tzdkvgigezpuaxnldqh3fx2h7h2ggslu
  sql/sql_yacc.yy                sp1f-sql_yacc.yy-19700101030959-wvn4qyy2drpmge7kaq3dysprbhlrv27j
  sql/structs.h                  sp1f-structs.h-19700101030959-dqulhwijezc2pwv2x4g32qdggnybj2nc
  sql/sys_vars.cc                set_var_new.cc-20090803110928-jyk836zs40b2z8e3-1
  sql/table.cc                   sp1f-table.cc-19700101030959-nsxtem2adyqzwe6nz4cgrpcmts3o54v7
  sql/table.h                    sp1f-table.h-19700101030959-dv72bajftxj5fbdjuajquappanuv2ija
-------------- next part --------------
=== modified file 'libmysqld/CMakeLists.txt'
--- a/libmysqld/CMakeLists.txt	2012-05-22 09:04:32 +0000
+++ b/libmysqld/CMakeLists.txt	2012-06-01 20:42:39 +0000
@@ -73,7 +73,8 @@
            ../sql/debug_sync.cc ../sql/opt_table_elimination.cc
            ../sql/sql_prepare.cc ../sql/sql_rename.cc ../sql/sql_repl.cc 
            ../sql/sql_select.cc ../sql/sql_servers.cc
-           ../sql/sql_show.cc ../sql/sql_state.c ../sql/sql_string.cc
+           ../sql/sql_show.cc ../sql/sql_state.c 
+           ../sql/sql_statistics.cc ../sql/sql_string.cc
            ../sql/sql_tablespace.cc ../sql/sql_table.cc ../sql/sql_test.cc
            ../sql/sql_trigger.cc ../sql/sql_udf.cc ../sql/sql_union.cc
            ../sql/sql_update.cc ../sql/sql_view.cc ../sql/sql_profile.cc

=== added file 'mysql-test/include/have_stat_tables.inc'
--- a/mysql-test/include/have_stat_tables.inc	1970-01-01 00:00:00 +0000
+++ b/mysql-test/include/have_stat_tables.inc	2012-05-08 23:42:55 +0000
@@ -0,0 +1,5 @@
+if (`select count(*) < 3 from information_schema.tables 
+    where table_schema = 'mysql' and table_name in ('table_stat','column_stat','index_stat')`)
+{
+  --skip Needs stat tables
+}

=== added file 'mysql-test/include/have_stat_tables.opt'
--- a/mysql-test/include/have_stat_tables.opt	1970-01-01 00:00:00 +0000
+++ b/mysql-test/include/have_stat_tables.opt	2012-06-03 00:19:01 +0000
@@ -0,0 +1,1 @@
+--use-stat-tables='complementary'

=== modified file 'mysql-test/include/system_db_struct.inc'
--- a/mysql-test/include/system_db_struct.inc	2006-12-11 16:44:03 +0000
+++ b/mysql-test/include/system_db_struct.inc	2012-01-05 01:51:53 +0000
@@ -16,3 +16,6 @@
 show create table event;
 show create table general_log;
 show create table slow_log;
+show create table table_stat;
+show create table column_stat;
+show create table index_stat;

=== added file 'mysql-test/include/world_schema_utf8.inc'
--- a/mysql-test/include/world_schema_utf8.inc	1970-01-01 00:00:00 +0000
+++ b/mysql-test/include/world_schema_utf8.inc	2012-01-05 01:51:53 +0000
@@ -0,0 +1,25 @@
+CREATE TABLE Country (
+  Code char(3) NOT NULL default '',
+  Name char(52) NOT NULL default '',
+  SurfaceArea float(10,2) NOT NULL default '0.00',
+  Population int(11) NOT NULL default '0',
+  Capital int(11) default NULL,
+  PRIMARY KEY  (Code),
+  UNIQUE INDEX (Name)
+) CHARACTER SET utf8 COLLATE utf8_bin;
+CREATE TABLE City (
+  ID int(11) NOT NULL auto_increment,
+  Name char(35) NOT NULL default '',
+  Country char(3) NOT NULL default '',
+  Population int(11) NOT NULL default '0',
+  PRIMARY KEY  (ID),
+  INDEX (Population),
+  INDEX (Country) 
+) CHARACTER SET utf8 COLLATE utf8_bin;
+CREATE TABLE CountryLanguage (
+  Country char(3) NOT NULL default '',
+  Language char(30) NOT NULL default '',
+  Percentage float(3,1) NOT NULL default '0.0',
+  PRIMARY KEY  (Country, Language),
+  INDEX (Percentage)
+) CHARACTER SET utf8 COLLATE utf8_bin;

=== modified file 'mysql-test/r/1st.result'
--- a/mysql-test/r/1st.result	2010-12-17 11:11:34 +0000
+++ b/mysql-test/r/1st.result	2012-03-19 08:35:32 +0000
@@ -7,6 +7,7 @@
 test
 show tables in mysql;
 Tables_in_mysql
+column_stat
 columns_priv
 db
 event
@@ -17,6 +18,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -24,6 +26,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second

=== modified file 'mysql-test/r/connect.result'
--- a/mysql-test/r/connect.result	2012-06-10 10:12:50 +0000
+++ b/mysql-test/r/connect.result	2012-06-26 18:37:48 +0000
@@ -1,6 +1,7 @@
 drop table if exists t1,t2;
 show tables;
 Tables_in_mysql
+column_stat
 columns_priv
 db
 event
@@ -11,6 +12,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -18,6 +20,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second
@@ -35,6 +38,7 @@
 grant ALL on *.* to test at 127.0.0.1 identified by "gambling";
 show tables;
 Tables_in_mysql
+column_stat
 columns_priv
 db
 event
@@ -45,6 +49,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -52,6 +57,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second
@@ -77,6 +83,7 @@
 set password=old_password('gambling3');
 show tables;
 Tables_in_mysql
+column_stat
 columns_priv
 db
 event
@@ -87,6 +94,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -94,6 +102,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second

=== modified file 'mysql-test/r/information_schema.result'
--- a/mysql-test/r/information_schema.result	2012-10-16 11:04:42 +0000
+++ b/mysql-test/r/information_schema.result	2012-11-03 03:38:05 +0000
@@ -81,6 +81,7 @@
 USER_PRIVILEGES
 USER_STATISTICS
 VIEWS
+column_stat
 columns_priv
 db
 event
@@ -91,6 +92,7 @@
 help_relation
 help_topic
 host
+index_stat
 plugin
 proc
 procs_priv
@@ -102,6 +104,7 @@
 t3
 t4
 t5
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second
@@ -120,6 +123,7 @@
 TABLE_PRIVILEGES	TABLE_PRIVILEGES
 TABLE_STATISTICS	TABLE_STATISTICS
 TRIGGERS	TRIGGERS
+table_stat	table_stat
 tables_priv	tables_priv
 time_zone	time_zone
 time_zone_leap_second	time_zone_leap_second
@@ -141,6 +145,7 @@
 TABLE_PRIVILEGES	TABLE_PRIVILEGES
 TABLE_STATISTICS	TABLE_STATISTICS
 TRIGGERS	TRIGGERS
+table_stat	table_stat
 tables_priv	tables_priv
 time_zone	time_zone
 time_zone_leap_second	time_zone_leap_second
@@ -162,6 +167,7 @@
 TABLE_PRIVILEGES	TABLE_PRIVILEGES
 TABLE_STATISTICS	TABLE_STATISTICS
 TRIGGERS	TRIGGERS
+table_stat	table_stat
 tables_priv	tables_priv
 time_zone	time_zone
 time_zone_leap_second	time_zone_leap_second

=== modified file 'mysql-test/r/information_schema_all_engines.result'
--- a/mysql-test/r/information_schema_all_engines.result	2012-10-16 08:36:28 +0000
+++ b/mysql-test/r/information_schema_all_engines.result	2012-11-03 03:38:05 +0000
@@ -418,4 +418,4 @@
 SELECT table_schema, count(*) FROM information_schema.TABLES WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test', 'mysqltest') AND table_name<>'ndb_binlog_index' AND table_name<>'ndb_apply_status' GROUP BY TABLE_SCHEMA;
 table_schema	count(*)
 information_schema	58
-mysql	23
+mysql	26

=== modified file 'mysql-test/r/log_tables_upgrade.result'
--- a/mysql-test/r/log_tables_upgrade.result	2011-07-02 20:08:51 +0000
+++ b/mysql-test/r/log_tables_upgrade.result	2012-03-19 08:35:32 +0000
@@ -19,6 +19,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -28,6 +29,7 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
@@ -35,6 +37,7 @@
 mysql.proxies_priv                                 OK
 mysql.renamed_general_log                          OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK

=== added file 'mysql-test/r/mdev-504.result'
--- a/mysql-test/r/mdev-504.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/mdev-504.result	2012-09-03 18:01:52 +0000
@@ -0,0 +1,21 @@
+CREATE TABLE A (
+pk INTEGER AUTO_INCREMENT PRIMARY KEY,
+fdate DATE
+) ENGINE=MyISAM;
+CREATE PROCEDURE p_analyze()
+BEGIN
+DECLARE attempts INTEGER DEFAULT 100;
+wl_loop: WHILE attempts > 0 DO
+ANALYZE TABLE A;
+SET attempts = attempts - 1;
+END WHILE wl_loop;
+END |
+CREATE FUNCTION rnd3() RETURNS INT
+BEGIN
+RETURN ROUND(3 * RAND() + 0.5);
+END |
+SET GLOBAL use_stat_tables = PREFERABLY;
+DROP TABLE A;
+DROP PROCEDURE p_analyze;
+DROP FUNCTION rnd3;
+SET GLOBAL use_stat_tables = DEFAULT;

=== modified file 'mysql-test/r/mysql_upgrade.result'
--- a/mysql-test/r/mysql_upgrade.result	2012-01-16 19:16:35 +0000
+++ b/mysql-test/r/mysql_upgrade.result	2012-03-19 08:35:32 +0000
@@ -7,6 +7,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -16,12 +17,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK
@@ -44,6 +47,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -53,12 +57,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK
@@ -81,6 +87,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -90,12 +97,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK
@@ -121,6 +130,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -130,12 +140,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK
@@ -164,6 +176,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -173,12 +186,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK
@@ -210,6 +225,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -219,12 +235,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK
@@ -259,6 +277,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -268,12 +287,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK

=== modified file 'mysql-test/r/mysql_upgrade_ssl.result'
--- a/mysql-test/r/mysql_upgrade_ssl.result	2011-07-02 20:08:51 +0000
+++ b/mysql-test/r/mysql_upgrade_ssl.result	2012-03-19 08:35:32 +0000
@@ -9,6 +9,7 @@
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
 mysql
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -18,12 +19,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK

=== modified file 'mysql-test/r/mysqlcheck.result'
--- a/mysql-test/r/mysqlcheck.result	2012-02-21 19:51:56 +0000
+++ b/mysql-test/r/mysqlcheck.result	2012-03-19 08:35:32 +0000
@@ -3,6 +3,7 @@
 drop database if exists client_test_db;
 mtr.global_suppressions                            OK
 mtr.test_suppressions                              OK
+mysql.column_stat                                  OK
 mysql.columns_priv                                 OK
 mysql.db                                           OK
 mysql.event                                        OK
@@ -12,12 +13,14 @@
 mysql.help_relation                                OK
 mysql.help_topic                                   OK
 mysql.host                                         OK
+mysql.index_stat                                   OK
 mysql.ndb_binlog_index                             OK
 mysql.plugin                                       OK
 mysql.proc                                         OK
 mysql.procs_priv                                   OK
 mysql.proxies_priv                                 OK
 mysql.servers                                      OK
+mysql.table_stat                                   OK
 mysql.tables_priv                                  OK
 mysql.time_zone                                    OK
 mysql.time_zone_leap_second                        OK
@@ -27,50 +30,57 @@
 mysql.user                                         OK
 mtr.global_suppressions                            Table is already up to date
 mtr.test_suppressions                              Table is already up to date
-mysql.columns_priv                                 OK
-mysql.db                                           OK
-mysql.event                                        OK
-mysql.func                                         OK
-mysql.help_category                                OK
-mysql.help_keyword                                 OK
-mysql.help_relation                                OK
-mysql.help_topic                                   OK
-mysql.host                                         OK
-mysql.ndb_binlog_index                             OK
-mysql.plugin                                       OK
-mysql.proc                                         OK
-mysql.procs_priv                                   OK
-mysql.proxies_priv                                 OK
-mysql.servers                                      OK
-mysql.tables_priv                                  OK
-mysql.time_zone                                    OK
-mysql.time_zone_leap_second                        OK
-mysql.time_zone_name                               OK
-mysql.time_zone_transition                         OK
-mysql.time_zone_transition_type                    OK
-mysql.user                                         OK
-mysql.columns_priv                                 OK
-mysql.db                                           OK
-mysql.event                                        OK
-mysql.func                                         OK
-mysql.help_category                                OK
-mysql.help_keyword                                 OK
-mysql.help_relation                                OK
-mysql.help_topic                                   OK
-mysql.host                                         OK
-mysql.ndb_binlog_index                             OK
-mysql.plugin                                       OK
-mysql.proc                                         OK
-mysql.procs_priv                                   OK
-mysql.proxies_priv                                 OK
-mysql.servers                                      OK
-mysql.tables_priv                                  OK
-mysql.time_zone                                    OK
-mysql.time_zone_leap_second                        OK
-mysql.time_zone_name                               OK
-mysql.time_zone_transition                         OK
-mysql.time_zone_transition_type                    OK
-mysql.user                                         OK
+mysql.column_stat                                  OK
+mysql.columns_priv                                 OK
+mysql.db                                           OK
+mysql.event                                        OK
+mysql.func                                         OK
+mysql.help_category                                OK
+mysql.help_keyword                                 OK
+mysql.help_relation                                OK
+mysql.help_topic                                   OK
+mysql.host                                         OK
+mysql.index_stat                                   OK
+mysql.ndb_binlog_index                             OK
+mysql.plugin                                       OK
+mysql.proc                                         OK
+mysql.procs_priv                                   OK
+mysql.proxies_priv                                 OK
+mysql.servers                                      OK
+mysql.table_stat                                   OK
+mysql.tables_priv                                  OK
+mysql.time_zone                                    OK
+mysql.time_zone_leap_second                        OK
+mysql.time_zone_name                               OK
+mysql.time_zone_transition                         OK
+mysql.time_zone_transition_type                    OK
+mysql.user                                         OK
+mysql.column_stat                                  OK
+mysql.columns_priv                                 OK
+mysql.db                                           OK
+mysql.event                                        OK
+mysql.func                                         OK
+mysql.help_category                                OK
+mysql.help_keyword                                 OK
+mysql.help_relation                                OK
+mysql.help_topic                                   OK
+mysql.host                                         OK
+mysql.index_stat                                   OK
+mysql.ndb_binlog_index                             OK
+mysql.plugin                                       OK
+mysql.proc                                         OK
+mysql.procs_priv                                   OK
+mysql.proxies_priv                                 OK
+mysql.servers                                      OK
+mysql.table_stat                                   OK
+mysql.tables_priv                                  OK
+mysql.time_zone                                    OK
+mysql.time_zone_leap_second                        OK
+mysql.time_zone_name                               OK
+mysql.time_zone_transition                         OK
+mysql.time_zone_transition_type                    OK
+mysql.user                                         OK
+mysql.column_stat                                  Table is already up to date
 mysql.columns_priv                                 Table is already up to date
 mysql.db                                           Table is already up to date
 mysql.event                                        Table is already up to date
@@ -80,12 +90,14 @@
 mysql.help_relation                                Table is already up to date
 mysql.help_topic                                   Table is already up to date
 mysql.host                                         Table is already up to date
+mysql.index_stat                                   Table is already up to date
 mysql.ndb_binlog_index                             Table is already up to date
 mysql.plugin                                       Table is already up to date
 mysql.proc                                         Table is already up to date
 mysql.procs_priv                                   Table is already up to date
 mysql.proxies_priv                                 Table is already up to date
 mysql.servers                                      Table is already up to date
+mysql.table_stat                                   Table is already up to date
 mysql.tables_priv                                  Table is already up to date
 mysql.time_zone                                    Table is already up to date
 mysql.time_zone_leap_second                        Table is already up to date

=== modified file 'mysql-test/r/mysqld--help.result'
--- a/mysql-test/r/mysqld--help.result	2012-10-18 21:33:06 +0000
+++ b/mysql-test/r/mysqld--help.result	2012-11-03 03:38:05 +0000
@@ -843,6 +843,9 @@
  Prohibit update of a VIEW, which does not contain a key
  of the underlying table and the query uses a LIMIT clause
  (usually get from GUI tools)
+ --use-stat-tables=name 
+ Specifies how to use system statistics tables. Possible
+ values are NEVER, COMPLEMENTARY, PREVERABLY
  -u, --user=name     Run mysqld daemon as user.
  --userstat          Enables statistics gathering for USER_STATISTICS,
  CLIENT_STATISTICS, INDEX_STATISTICS and TABLE_STATISTICS
@@ -1096,6 +1099,7 @@
 transaction-isolation REPEATABLE-READ
 transaction-prealloc-size 4096
 updatable-views-with-limit YES
+use-stat-tables NEVER
 userstat FALSE
 verbose TRUE
 wait-timeout 28800

=== added file 'mysql-test/r/stat_tables.result'
--- a/mysql-test/r/stat_tables.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/stat_tables.result	2012-09-12 05:36:04 +0000
@@ -0,0 +1,383 @@
+select @@global.use_stat_tables;
+@@global.use_stat_tables
+COMPLEMENTARY
+select @@session.use_stat_tables;
+@@session.use_stat_tables
+COMPLEMENTARY
+set @save_use_stat_tables=@@use_stat_tables;
+set use_stat_tables='preferably';
+DROP DATABASE IF EXISTS dbt3_s001;
+CREATE DATABASE dbt3_s001;
+use dbt3_s001;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+select * from mysql.table_stat;
+db_name	table_name	cardinality
+dbt3_s001	customer	150
+dbt3_s001	lineitem	6005
+dbt3_s001	nation	25
+dbt3_s001	orders	1500
+dbt3_s001	part	200
+dbt3_s001	partsupp	700
+dbt3_s001	region	5
+dbt3_s001	supplier	10
+select * from mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	customer	PRIMARY	1	1.0000
+dbt3_s001	customer	i_c_nationkey	1	6.0000
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	nation	PRIMARY	1	1.0000
+dbt3_s001	nation	i_n_regionkey	1	5.0000
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_custkey	1	15.0000
+dbt3_s001	part	PRIMARY	1	1.0000
+dbt3_s001	part	i_p_retailprice	1	1.0000
+dbt3_s001	partsupp	PRIMARY	1	3.5000
+dbt3_s001	partsupp	PRIMARY	2	1.0000
+dbt3_s001	partsupp	i_ps_partkey	1	3.5000
+dbt3_s001	partsupp	i_ps_suppkey	1	70.0000
+dbt3_s001	region	PRIMARY	1	1.0000
+dbt3_s001	supplier	PRIMARY	1	1.0000
+dbt3_s001	supplier	i_s_nationkey	1	1.1111
+set optimizer_switch=@save_optimizer_switch;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='index_condition_pushdown=off';
+EXPLAIN select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	range	PRIMARY,i_o_orderdate,i_o_custkey	i_o_orderdate	4	NULL	179	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY,i_c_nationkey	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	nation	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.customer.c_nationkey	1	
+1	SIMPLE	region	ALL	PRIMARY	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+1	SIMPLE	supplier	eq_ref	PRIMARY,i_s_nationkey	PRIMARY	4	dbt3_s001.lineitem.l_suppkey	1	Using where
+select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+n_name	revenue
+PERU	321915.8715
+ARGENTINA	69817.1451
+set optimizer_switch=@save_optimizer_switch;
+delete from mysql.index_stat;
+select * from mysql.table_stat;
+db_name	table_name	cardinality
+dbt3_s001	customer	150
+dbt3_s001	lineitem	6005
+dbt3_s001	nation	25
+dbt3_s001	orders	1500
+dbt3_s001	part	200
+dbt3_s001	partsupp	700
+dbt3_s001	region	5
+dbt3_s001	supplier	10
+select * from mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	customer	PRIMARY	1	1.0000
+dbt3_s001	customer	i_c_nationkey	1	6.0000
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	nation	PRIMARY	1	1.0000
+dbt3_s001	nation	i_n_regionkey	1	5.0000
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_custkey	1	15.0000
+dbt3_s001	part	PRIMARY	1	1.0000
+dbt3_s001	part	i_p_retailprice	1	1.0000
+dbt3_s001	partsupp	PRIMARY	1	3.5000
+dbt3_s001	partsupp	PRIMARY	2	1.0000
+dbt3_s001	partsupp	i_ps_partkey	1	3.5000
+dbt3_s001	partsupp	i_ps_suppkey	1	70.0000
+dbt3_s001	region	PRIMARY	1	1.0000
+dbt3_s001	supplier	PRIMARY	1	1.0000
+dbt3_s001	supplier	i_s_nationkey	1	1.1111
+select * from mysql.table_stat where table_name='orders';
+db_name	table_name	cardinality
+dbt3_s001	orders	1500
+select * from mysql.index_stat where table_name='orders';
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_custkey	1	15.0000
+select (select cardinality from mysql.table_stat where table_name='orders') /
+(select avg_frequency from mysql.index_stat 
+where index_name='i_o_orderdate' and prefix_arity=1) as n_distinct;
+n_distinct
+1126.0416
+select count(distinct o_orderdate) from orders;
+count(distinct o_orderdate)
+1126
+select (select cardinality from mysql.table_stat where table_name='orders') /
+(select avg_frequency from mysql.index_stat 
+where index_name='i_o_custkey' and prefix_arity=1) as n_distinct;
+n_distinct
+100.0000
+select count(distinct o_custkey) from orders;
+count(distinct o_custkey)
+100
+show index from orders;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+orders	0	PRIMARY	1	o_orderkey	A	1500	NULL	NULL		BTREE		
+orders	1	i_o_orderdate	1	o_orderDATE	A	1126	NULL	NULL	YES	BTREE		
+orders	1	i_o_custkey	1	o_custkey	A	100	NULL	NULL	YES	BTREE		
+select index_name, column_name, cardinality from information_schema.statistics
+where table_name='orders';
+index_name	column_name	cardinality
+PRIMARY	o_orderkey	1500
+i_o_orderdate	o_orderDATE	1126
+i_o_custkey	o_custkey	100
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='index_condition_pushdown=off';
+EXPLAIN select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	range	PRIMARY,i_o_orderdate,i_o_custkey	i_o_orderdate	4	NULL	179	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY,i_c_nationkey	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	nation	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.customer.c_nationkey	1	
+1	SIMPLE	region	ALL	PRIMARY	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+1	SIMPLE	supplier	eq_ref	PRIMARY,i_s_nationkey	PRIMARY	4	dbt3_s001.lineitem.l_suppkey	1	Using where
+select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+n_name	revenue
+PERU	321915.8715
+ARGENTINA	69817.1451
+set optimizer_switch=@save_optimizer_switch;
+EXPLAIN select o_year,
+sum(case when nation = 'UNITED STATES' then volume else 0 end) /
+sum(volume) as mkt_share
+from (select extract(year from o_orderdate) as o_year,
+l_extendedprice * (1-l_discount) as volume, 
+n2.n_name as nation
+from part, supplier, lineitem, orders, customer, 
+nation n1, nation n2, region
+where p_partkey = l_partkey and s_suppkey = l_suppkey
+and l_orderkey = o_orderkey and o_custkey = c_custkey
+and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey
+and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey
+and o_orderdate between date '1995-01-01' and date '1996-12-31'
+            and p_type = 'STANDARD BRUSHED STEEL' ) as all_nations
+group by o_year
+order by o_year;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	ALL	PRIMARY,i_o_orderdate,i_o_custkey	NULL	NULL	NULL	1500	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY,i_c_nationkey	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	n1	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.customer.c_nationkey	1	
+1	SIMPLE	region	ALL	PRIMARY	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+1	SIMPLE	part	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.lineitem.l_partkey	1	Using where
+1	SIMPLE	supplier	eq_ref	PRIMARY,i_s_nationkey	PRIMARY	4	dbt3_s001.lineitem.l_suppkey	1	Using where
+1	SIMPLE	n2	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	
+select o_year,
+sum(case when nation = 'UNITED STATES' then volume else 0 end) /
+sum(volume) as mkt_share
+from (select extract(year from o_orderdate) as o_year,
+l_extendedprice * (1-l_discount) as volume, 
+n2.n_name as nation
+from part, supplier, lineitem, orders, customer, 
+nation n1, nation n2, region
+where p_partkey = l_partkey and s_suppkey = l_suppkey
+and l_orderkey = o_orderkey and o_custkey = c_custkey
+and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey
+and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey
+and o_orderdate between date '1995-01-01' and date '1996-12-31'
+            and p_type = 'STANDARD BRUSHED STEEL' ) as all_nations
+group by o_year
+order by o_year;
+o_year	mkt_share
+1995	0.4495521838895718
+1996	0.024585468215352495
+EXPLAIN select nation, o_year, sum(amount) as sum_profit
+from (select n_name as nation, 
+extract(year from o_orderdate) as o_year,
+l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount
+from part, supplier, lineitem, partsupp, orders, nation
+where s_suppkey = l_suppkey and ps_suppkey = l_suppkey
+and ps_partkey = l_partkey and p_partkey = l_partkey
+and o_orderkey = l_orderkey and s_nationkey = n_nationkey
+and p_name like '%green%') as profit
+group by nation, o_year
+order by nation, o_year desc;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	supplier	ALL	PRIMARY,i_s_nationkey	NULL	NULL	NULL	10	Using where; Using temporary; Using filesort
+1	SIMPLE	nation	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	
+1	SIMPLE	partsupp	ref	PRIMARY,i_ps_partkey,i_ps_suppkey	i_ps_suppkey	4	dbt3_s001.supplier.s_suppkey	70	
+1	SIMPLE	part	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.partsupp.ps_partkey	1	Using where
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	i_l_suppkey_partkey	10	dbt3_s001.partsupp.ps_partkey,dbt3_s001.supplier.s_suppkey	8	
+1	SIMPLE	orders	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.lineitem.l_orderkey	1	
+select nation, o_year, sum(amount) as sum_profit
+from (select n_name as nation, 
+extract(year from o_orderdate) as o_year,
+l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount
+from part, supplier, lineitem, partsupp, orders, nation
+where s_suppkey = l_suppkey and ps_suppkey = l_suppkey
+and ps_partkey = l_partkey and p_partkey = l_partkey
+and o_orderkey = l_orderkey and s_nationkey = n_nationkey
+and p_name like '%green%') as profit
+group by nation, o_year
+order by nation, o_year desc;
+nation	o_year	sum_profit
+ARGENTINA	1997	18247.873399999993
+ARGENTINA	1996	7731.089399999995
+ARGENTINA	1995	134490.5697
+ARGENTINA	1994	36767.101500000004
+ARGENTINA	1993	35857.08
+ARGENTINA	1992	35740
+ETHIOPIA	1998	2758.7801999999992
+ETHIOPIA	1997	19419.294599999997
+ETHIOPIA	1995	51231.87439999999
+ETHIOPIA	1994	3578.9478999999974
+ETHIOPIA	1992	1525.8234999999986
+IRAN	1998	37817.229600000006
+IRAN	1997	52643.77359999999
+IRAN	1996	70143.7761
+IRAN	1995	84094.58260000001
+IRAN	1994	18140.925599999995
+IRAN	1993	78655.1676
+IRAN	1992	87142.23960000002
+IRAQ	1998	22860.8082
+IRAQ	1997	93676.24359999999
+IRAQ	1996	45103.3242
+IRAQ	1994	36010.728599999995
+IRAQ	1993	33221.9399
+IRAQ	1992	47755.05900000001
+KENYA	1998	44194.831999999995
+KENYA	1997	57578.36259999999
+KENYA	1996	59195.90210000001
+KENYA	1995	79262.6278
+KENYA	1994	102360.66609999999
+KENYA	1993	128422.0196
+KENYA	1992	181517.2089
+MOROCCO	1998	41797.823199999984
+MOROCCO	1997	23685.801799999994
+MOROCCO	1996	62115.19579999998
+MOROCCO	1995	42442.64300000001
+MOROCCO	1994	48655.878000000004
+MOROCCO	1993	22926.744400000003
+MOROCCO	1992	32239.8088
+PERU	1998	86999.36459999997
+PERU	1997	121110.41070000001
+PERU	1996	177040.40759999995
+PERU	1995	122247.94520000002
+PERU	1994	88046.25329999998
+PERU	1993	49379.813799999996
+PERU	1992	80646.86050000001
+UNITED KINGDOM	1998	50577.25560000001
+UNITED KINGDOM	1997	114288.8605
+UNITED KINGDOM	1996	147684.46480000002
+UNITED KINGDOM	1995	225267.65759999998
+UNITED KINGDOM	1994	140595.5864
+UNITED KINGDOM	1993	322548.49210000003
+UNITED KINGDOM	1992	67747.88279999999
+UNITED STATES	1998	3957.0431999999996
+UNITED STATES	1997	94729.5704
+UNITED STATES	1996	79297.85670000002
+UNITED STATES	1995	62201.23360000001
+UNITED STATES	1994	43075.629899999985
+UNITED STATES	1993	27168.486199999996
+UNITED STATES	1992	34092.366
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=on';
+EXPLAIN select o_orderkey, p_partkey
+from part, lineitem, orders
+where p_retailprice > 1100 and o_orderdate='1997-01-01' 
+and o_orderkey=l_orderkey and p_partkey=l_partkey;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	ref	PRIMARY,i_o_orderdate	i_o_orderdate	4	const	1	
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey_partkey,i_l_partkey,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+1	SIMPLE	part	eq_ref	PRIMARY,i_p_retailprice	PRIMARY	4	dbt3_s001.lineitem.l_partkey	1	Using where
+select o_orderkey, p_partkey
+from part, lineitem, orders
+where p_retailprice > 1100 and o_orderdate='1997-01-01' 
+and o_orderkey=l_orderkey and p_partkey=l_partkey;
+o_orderkey	p_partkey
+5895	200
+set optimizer_switch=@save_optimizer_switch;
+DROP DATABASE dbt3_s001;
+use test;
+#
+# Bug mdev-473: ANALYZE table locked for write
+# 
+set use_stat_tables='complementary';
+create table t1 (i int);
+lock table t1 write;
+analyze table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Table is already up to date
+alter table t1 add column a varchar(8);
+drop table t1;
+#
+# Bug mdev-487: memory leak in ANALYZE with stat tables
+# 
+SET  use_stat_tables = 'preferably';
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+DELETE FROM t1 WHERE a=1;
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+DROP TABLE t1;
+#
+# Bug mdev-518: corrupted/missing statistical tables
+# 
+CREATE TABLE t1 (i int) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1),(2);
+FLUSH TABLE t1;
+SET use_stat_tables='never';
+EXPLAIN SELECT * FROM t1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
+FLUSH TABLES;
+SET use_stat_tables='preferably';
+EXPLAIN SELECT * FROM t1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
+DROP TABLE t1;
+set use_stat_tables=@save_use_stat_tables;

=== added file 'mysql-test/r/stat_tables_disabled.result'
--- a/mysql-test/r/stat_tables_disabled.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/stat_tables_disabled.result	2012-09-02 06:51:47 +0000
@@ -0,0 +1,70 @@
+SET SESSION STORAGE_ENGINE='InnoDB';
+select @@global.use_stat_tables;
+@@global.use_stat_tables
+NEVER
+select @@session.use_stat_tables;
+@@session.use_stat_tables
+NEVER
+set @save_use_stat_tables=@@use_stat_tables;
+set use_stat_tables='preferably';
+DROP DATABASE IF EXISTS dbt3_s001;
+CREATE DATABASE dbt3_s001;
+use dbt3_s001;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+#
+# Bug mdev-503: optimizer ignores setting use_stat_tables='preferably'
+# 
+flush tables 
+customer, lineitem, nation, orders, part, partsupp, region, supplier;
+set use_stat_tables='never';
+EXPLAIN select sql_calc_found_rows straight_join
+l_orderkey, sum(l_extendedprice*(1-l_discount)) as revenue,
+o_orderdate, o_shippriority
+from orders, customer, lineitem
+where c_mktsegment = 'BUILDING' and c_custkey = o_custkey
+and l_orderkey = o_orderkey and o_orderdate < date '1995-03-15'
+      and l_shipdate > date '1995-03-15'
+group by l_orderkey, o_orderdate, o_shippriority
+order by revenue desc, o_orderdate
+limit 10;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	ALL	PRIMARY,i_o_orderdate,i_o_custkey	NULL	NULL	NULL	#	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.orders.o_custkey	#	Using where
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	#	Using where
+set use_stat_tables='preferably';
+EXPLAIN select sql_calc_found_rows straight_join
+l_orderkey, sum(l_extendedprice*(1-l_discount)) as revenue,
+o_orderdate, o_shippriority
+from orders, customer, lineitem
+where c_mktsegment = 'BUILDING' and c_custkey = o_custkey
+and l_orderkey = o_orderkey and o_orderdate < date '1995-03-15'
+      and l_shipdate > date '1995-03-15'
+group by l_orderkey, o_orderdate, o_shippriority
+order by revenue desc, o_orderdate
+limit 10;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	ALL	PRIMARY,i_o_orderdate,i_o_custkey	NULL	NULL	NULL	1500	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+flush tables customer, orders, lineitem;
+EXPLAIN select sql_calc_found_rows straight_join
+l_orderkey, sum(l_extendedprice*(1-l_discount)) as revenue,
+o_orderdate, o_shippriority
+from orders, customer, lineitem
+where c_mktsegment = 'BUILDING' and c_custkey = o_custkey
+and l_orderkey = o_orderkey and o_orderdate < date '1995-03-15'
+      and l_shipdate > date '1995-03-15'
+group by l_orderkey, o_orderdate, o_shippriority
+order by revenue desc, o_orderdate
+limit 10;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	ALL	PRIMARY,i_o_orderdate,i_o_custkey	NULL	NULL	NULL	1500	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+# End of the test case for mdev-503
+set optimizer_switch=@save_optimizer_switch;
+DROP DATABASE dbt3_s001;
+use test;
+set use_stat_tables=@save_use_stat_tables;
+SET SESSION STORAGE_ENGINE=DEFAULT;

=== added file 'mysql-test/r/stat_tables_innodb.result'
--- a/mysql-test/r/stat_tables_innodb.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/stat_tables_innodb.result	2012-09-12 05:36:04 +0000
@@ -0,0 +1,412 @@
+SET SESSION STORAGE_ENGINE='InnoDB';
+set @save_optimizer_switch_for_stat_tables_test=@@optimizer_switch;
+set optimizer_switch='extended_keys=on';
+select @@global.use_stat_tables;
+@@global.use_stat_tables
+COMPLEMENTARY
+select @@session.use_stat_tables;
+@@session.use_stat_tables
+COMPLEMENTARY
+set @save_use_stat_tables=@@use_stat_tables;
+set use_stat_tables='preferably';
+DROP DATABASE IF EXISTS dbt3_s001;
+CREATE DATABASE dbt3_s001;
+use dbt3_s001;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+select * from mysql.table_stat;
+db_name	table_name	cardinality
+dbt3_s001	customer	150
+dbt3_s001	lineitem	6005
+dbt3_s001	nation	25
+dbt3_s001	orders	1500
+dbt3_s001	part	200
+dbt3_s001	partsupp	700
+dbt3_s001	region	5
+dbt3_s001	supplier	10
+select * from mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	customer	PRIMARY	1	1.0000
+dbt3_s001	customer	i_c_nationkey	1	6.0000
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	nation	PRIMARY	1	1.0000
+dbt3_s001	nation	i_n_regionkey	1	5.0000
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_custkey	1	15.0000
+dbt3_s001	part	PRIMARY	1	1.0000
+dbt3_s001	part	i_p_retailprice	1	1.0000
+dbt3_s001	partsupp	PRIMARY	1	3.5000
+dbt3_s001	partsupp	PRIMARY	2	1.0000
+dbt3_s001	partsupp	i_ps_partkey	1	3.5000
+dbt3_s001	partsupp	i_ps_suppkey	1	70.0000
+dbt3_s001	region	PRIMARY	1	1.0000
+dbt3_s001	supplier	PRIMARY	1	1.0000
+dbt3_s001	supplier	i_s_nationkey	1	1.1111
+set optimizer_switch=@save_optimizer_switch;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='index_condition_pushdown=off';
+EXPLAIN select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	range	PRIMARY,i_o_orderdate,i_o_custkey	i_o_orderdate	4	NULL	211	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY,i_c_nationkey	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	nation	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.customer.c_nationkey	1	
+1	SIMPLE	supplier	ref	PRIMARY,i_s_nationkey	i_s_nationkey	5	dbt3_s001.customer.c_nationkey	1	Using index
+1	SIMPLE	region	ALL	PRIMARY	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+n_name	revenue
+PERU	321915.8715
+ARGENTINA	69817.1451
+set optimizer_switch=@save_optimizer_switch;
+delete from mysql.index_stat;
+select * from mysql.table_stat;
+db_name	table_name	cardinality
+dbt3_s001	customer	150
+dbt3_s001	lineitem	6005
+dbt3_s001	nation	25
+dbt3_s001	orders	1500
+dbt3_s001	part	200
+dbt3_s001	partsupp	700
+dbt3_s001	region	5
+dbt3_s001	supplier	10
+select * from mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	customer	PRIMARY	1	1.0000
+dbt3_s001	customer	i_c_nationkey	1	6.0000
+dbt3_s001	customer	i_c_nationkey	2	1.0000
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_shipdate	2	1.0149
+dbt3_s001	lineitem	i_l_shipdate	3	1.0000
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_suppkey_partkey	3	1.0030
+dbt3_s001	lineitem	i_l_suppkey_partkey	4	1.0000
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_partkey	2	1.0089
+dbt3_s001	lineitem	i_l_partkey	3	1.0000
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey	2	1.2073
+dbt3_s001	lineitem	i_l_suppkey	3	1.0000
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_receiptdate	2	1.0152
+dbt3_s001	lineitem	i_l_receiptdate	3	1.0000
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey	2	1.0000
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_orderkey_quantity	3	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_commitdate	2	1.0364
+dbt3_s001	lineitem	i_l_commitdate	3	1.0000
+dbt3_s001	nation	PRIMARY	1	1.0000
+dbt3_s001	nation	i_n_regionkey	1	5.0000
+dbt3_s001	nation	i_n_regionkey	2	1.0000
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_orderdate	2	1.0000
+dbt3_s001	orders	i_o_custkey	1	15.0000
+dbt3_s001	orders	i_o_custkey	2	1.0000
+dbt3_s001	part	PRIMARY	1	1.0000
+dbt3_s001	part	i_p_retailprice	1	1.0000
+dbt3_s001	part	i_p_retailprice	2	1.0000
+dbt3_s001	partsupp	PRIMARY	1	3.5000
+dbt3_s001	partsupp	PRIMARY	2	1.0000
+dbt3_s001	partsupp	i_ps_partkey	1	3.5000
+dbt3_s001	partsupp	i_ps_partkey	2	1.0000
+dbt3_s001	partsupp	i_ps_suppkey	1	70.0000
+dbt3_s001	partsupp	i_ps_suppkey	2	1.0000
+dbt3_s001	region	PRIMARY	1	1.0000
+dbt3_s001	supplier	PRIMARY	1	1.0000
+dbt3_s001	supplier	i_s_nationkey	1	1.1111
+dbt3_s001	supplier	i_s_nationkey	2	1.0000
+select * from mysql.table_stat where table_name='orders';
+db_name	table_name	cardinality
+dbt3_s001	orders	1500
+select * from mysql.index_stat where table_name='orders';
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_orderdate	2	1.0000
+dbt3_s001	orders	i_o_custkey	1	15.0000
+dbt3_s001	orders	i_o_custkey	2	1.0000
+select (select cardinality from mysql.table_stat where table_name='orders') /
+(select avg_frequency from mysql.index_stat 
+where index_name='i_o_orderdate' and prefix_arity=1) as n_distinct;
+n_distinct
+1126.0416
+select count(distinct o_orderdate) from orders;
+count(distinct o_orderdate)
+1126
+select (select cardinality from mysql.table_stat where table_name='orders') /
+(select avg_frequency from mysql.index_stat 
+where index_name='i_o_custkey' and prefix_arity=1) as n_distinct;
+n_distinct
+100.0000
+select count(distinct o_custkey) from orders;
+count(distinct o_custkey)
+100
+show index from orders;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+orders	0	PRIMARY	1	o_orderkey	A	1500	NULL	NULL		BTREE		
+orders	1	i_o_orderdate	1	o_orderDATE	A	1126	NULL	NULL	YES	BTREE		
+orders	1	i_o_custkey	1	o_custkey	A	100	NULL	NULL	YES	BTREE		
+select index_name, column_name, cardinality from information_schema.statistics
+where table_name='orders';
+index_name	column_name	cardinality
+PRIMARY	o_orderkey	1500
+i_o_orderdate	o_orderDATE	1126
+i_o_custkey	o_custkey	100
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='index_condition_pushdown=off';
+EXPLAIN select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	range	PRIMARY,i_o_orderdate,i_o_custkey	i_o_orderdate	4	NULL	211	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY,i_c_nationkey	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	nation	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.customer.c_nationkey	1	
+1	SIMPLE	supplier	ref	PRIMARY,i_s_nationkey	i_s_nationkey	5	dbt3_s001.customer.c_nationkey	1	Using index
+1	SIMPLE	region	ALL	PRIMARY	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+n_name	revenue
+PERU	321915.8715
+ARGENTINA	69817.1451
+set optimizer_switch=@save_optimizer_switch;
+EXPLAIN select o_year,
+sum(case when nation = 'UNITED STATES' then volume else 0 end) /
+sum(volume) as mkt_share
+from (select extract(year from o_orderdate) as o_year,
+l_extendedprice * (1-l_discount) as volume, 
+n2.n_name as nation
+from part, supplier, lineitem, orders, customer, 
+nation n1, nation n2, region
+where p_partkey = l_partkey and s_suppkey = l_suppkey
+and l_orderkey = o_orderkey and o_custkey = c_custkey
+and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey
+and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey
+and o_orderdate between date '1995-01-01' and date '1996-12-31'
+            and p_type = 'STANDARD BRUSHED STEEL' ) as all_nations
+group by o_year
+order by o_year;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	orders	ALL	PRIMARY,i_o_orderdate,i_o_custkey	NULL	NULL	NULL	1500	Using where; Using temporary; Using filesort
+1	SIMPLE	customer	eq_ref	PRIMARY,i_c_nationkey	PRIMARY	4	dbt3_s001.orders.o_custkey	1	Using where
+1	SIMPLE	n1	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.customer.c_nationkey	1	
+1	SIMPLE	region	ALL	PRIMARY	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	dbt3_s001.orders.o_orderkey	4	Using where
+1	SIMPLE	part	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.lineitem.l_partkey	1	Using where
+1	SIMPLE	supplier	eq_ref	PRIMARY,i_s_nationkey	PRIMARY	4	dbt3_s001.lineitem.l_suppkey	1	Using where
+1	SIMPLE	n2	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	
+select o_year,
+sum(case when nation = 'UNITED STATES' then volume else 0 end) /
+sum(volume) as mkt_share
+from (select extract(year from o_orderdate) as o_year,
+l_extendedprice * (1-l_discount) as volume, 
+n2.n_name as nation
+from part, supplier, lineitem, orders, customer, 
+nation n1, nation n2, region
+where p_partkey = l_partkey and s_suppkey = l_suppkey
+and l_orderkey = o_orderkey and o_custkey = c_custkey
+and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey
+and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey
+and o_orderdate between date '1995-01-01' and date '1996-12-31'
+            and p_type = 'STANDARD BRUSHED STEEL' ) as all_nations
+group by o_year
+order by o_year;
+o_year	mkt_share
+1995	0.4495521838895718
+1996	0.024585468215352495
+EXPLAIN select nation, o_year, sum(amount) as sum_profit
+from (select n_name as nation, 
+extract(year from o_orderdate) as o_year,
+l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount
+from part, supplier, lineitem, partsupp, orders, nation
+where s_suppkey = l_suppkey and ps_suppkey = l_suppkey
+and ps_partkey = l_partkey and p_partkey = l_partkey
+and o_orderkey = l_orderkey and s_nationkey = n_nationkey
+and p_name like '%green%') as profit
+group by nation, o_year
+order by nation, o_year desc;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	supplier	index	PRIMARY,i_s_nationkey	i_s_nationkey	5	NULL	10	Using where; Using index; Using temporary; Using filesort
+1	SIMPLE	nation	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	
+1	SIMPLE	partsupp	ref	PRIMARY,i_ps_partkey,i_ps_suppkey	i_ps_suppkey	4	dbt3_s001.supplier.s_suppkey	70	
+1	SIMPLE	part	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.partsupp.ps_partkey	1	Using where
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity	i_l_suppkey_partkey	10	dbt3_s001.partsupp.ps_partkey,dbt3_s001.supplier.s_suppkey	8	
+1	SIMPLE	orders	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.lineitem.l_orderkey	1	
+select nation, o_year, sum(amount) as sum_profit
+from (select n_name as nation, 
+extract(year from o_orderdate) as o_year,
+l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount
+from part, supplier, lineitem, partsupp, orders, nation
+where s_suppkey = l_suppkey and ps_suppkey = l_suppkey
+and ps_partkey = l_partkey and p_partkey = l_partkey
+and o_orderkey = l_orderkey and s_nationkey = n_nationkey
+and p_name like '%green%') as profit
+group by nation, o_year
+order by nation, o_year desc;
+nation	o_year	sum_profit
+ARGENTINA	1997	18247.873399999993
+ARGENTINA	1996	7731.089399999995
+ARGENTINA	1995	134490.5697
+ARGENTINA	1994	36767.101500000004
+ARGENTINA	1993	35857.08
+ARGENTINA	1992	35740
+ETHIOPIA	1998	2758.7801999999992
+ETHIOPIA	1997	19419.294599999997
+ETHIOPIA	1995	51231.87439999999
+ETHIOPIA	1994	3578.9478999999974
+ETHIOPIA	1992	1525.8234999999986
+IRAN	1998	37817.229600000006
+IRAN	1997	52643.77359999999
+IRAN	1996	70143.7761
+IRAN	1995	84094.58260000001
+IRAN	1994	18140.925599999995
+IRAN	1993	78655.1676
+IRAN	1992	87142.23960000002
+IRAQ	1998	22860.8082
+IRAQ	1997	93676.24359999999
+IRAQ	1996	45103.3242
+IRAQ	1994	36010.728599999995
+IRAQ	1993	33221.9399
+IRAQ	1992	47755.05900000001
+KENYA	1998	44194.831999999995
+KENYA	1997	57578.36259999999
+KENYA	1996	59195.90210000001
+KENYA	1995	79262.6278
+KENYA	1994	102360.66609999999
+KENYA	1993	128422.0196
+KENYA	1992	181517.2089
+MOROCCO	1998	41797.823199999984
+MOROCCO	1997	23685.801799999994
+MOROCCO	1996	62115.19579999998
+MOROCCO	1995	42442.64300000001
+MOROCCO	1994	48655.878000000004
+MOROCCO	1993	22926.744400000003
+MOROCCO	1992	32239.8088
+PERU	1998	86999.36459999997
+PERU	1997	121110.41070000001
+PERU	1996	177040.40759999995
+PERU	1995	122247.94520000002
+PERU	1994	88046.25329999998
+PERU	1993	49379.813799999996
+PERU	1992	80646.86050000001
+UNITED KINGDOM	1998	50577.25560000001
+UNITED KINGDOM	1997	114288.8605
+UNITED KINGDOM	1996	147684.46480000002
+UNITED KINGDOM	1995	225267.65759999998
+UNITED KINGDOM	1994	140595.5864
+UNITED KINGDOM	1993	322548.49210000003
+UNITED KINGDOM	1992	67747.88279999999
+UNITED STATES	1998	3957.0431999999996
+UNITED STATES	1997	94729.5704
+UNITED STATES	1996	79297.85670000002
+UNITED STATES	1995	62201.23360000001
+UNITED STATES	1994	43075.629899999985
+UNITED STATES	1993	27168.486199999996
+UNITED STATES	1992	34092.366
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=on';
+EXPLAIN select o_orderkey, p_partkey
+from part, lineitem, orders
+where p_retailprice > 1100 and o_orderdate='1997-01-01' 
+and o_orderkey=l_orderkey and p_partkey=l_partkey;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	part	range	PRIMARY,i_p_retailprice	i_p_retailprice	9	NULL	1	Using where; Using index
+1	SIMPLE	orders	ref	PRIMARY,i_o_orderdate	i_o_orderdate	4	const	1	Using index
+1	SIMPLE	lineitem	ref	PRIMARY,i_l_suppkey_partkey,i_l_partkey,i_l_orderkey,i_l_orderkey_quantity	i_l_partkey	9	dbt3_s001.part.p_partkey,dbt3_s001.orders.o_orderkey	1	Using index
+select o_orderkey, p_partkey
+from part, lineitem, orders
+where p_retailprice > 1100 and o_orderdate='1997-01-01' 
+and o_orderkey=l_orderkey and p_partkey=l_partkey;
+o_orderkey	p_partkey
+5895	200
+set optimizer_switch=@save_optimizer_switch;
+DROP DATABASE dbt3_s001;
+use test;
+#
+# Bug mdev-473: ANALYZE table locked for write
+# 
+set use_stat_tables='complementary';
+create table t1 (i int);
+lock table t1 write;
+analyze table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+alter table t1 add column a varchar(8);
+drop table t1;
+#
+# Bug mdev-487: memory leak in ANALYZE with stat tables
+# 
+SET  use_stat_tables = 'preferably';
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+DELETE FROM t1 WHERE a=1;
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+DROP TABLE t1;
+#
+# Bug mdev-518: corrupted/missing statistical tables
+# 
+CREATE TABLE t1 (i int) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1),(2);
+FLUSH TABLE t1;
+SET use_stat_tables='never';
+EXPLAIN SELECT * FROM t1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
+FLUSH TABLES;
+SET use_stat_tables='preferably';
+EXPLAIN SELECT * FROM t1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
+DROP TABLE t1;
+set use_stat_tables=@save_use_stat_tables;
+set optimizer_switch=@save_optimizer_switch_for_stat_tables_test;
+SET SESSION STORAGE_ENGINE=DEFAULT;

=== added file 'mysql-test/r/stat_tables_par.result'
--- a/mysql-test/r/stat_tables_par.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/stat_tables_par.result	2012-07-28 00:33:23 +0000
@@ -0,0 +1,167 @@
+set @save_use_stat_tables=@@use_stat_tables;
+set use_stat_tables='preferably';
+DROP DATABASE IF EXISTS dbt3_s001;
+CREATE DATABASE dbt3_s001;
+use dbt3_s001;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+select * from mysql.table_stat;
+db_name	table_name	cardinality
+dbt3_s001	customer	150
+dbt3_s001	lineitem	6005
+dbt3_s001	nation	25
+dbt3_s001	orders	1500
+dbt3_s001	part	200
+dbt3_s001	partsupp	700
+dbt3_s001	region	5
+dbt3_s001	supplier	10
+select * from mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	customer	PRIMARY	1	1.0000
+dbt3_s001	customer	i_c_nationkey	1	6.0000
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	nation	PRIMARY	1	1.0000
+dbt3_s001	nation	i_n_regionkey	1	5.0000
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_custkey	1	15.0000
+dbt3_s001	part	PRIMARY	1	1.0000
+dbt3_s001	partsupp	PRIMARY	1	3.5000
+dbt3_s001	partsupp	PRIMARY	2	1.0000
+dbt3_s001	partsupp	i_ps_partkey	1	3.5000
+dbt3_s001	partsupp	i_ps_suppkey	1	70.0000
+dbt3_s001	region	PRIMARY	1	1.0000
+dbt3_s001	supplier	PRIMARY	1	1.0000
+dbt3_s001	supplier	i_s_nationkey	1	1.1111
+flush table lineitem;
+set use_stat_tables='never';
+select sum(l_extendedprice*l_discount) as revenue
+from lineitem
+where l_shipdate >= date '1994-01-01' 
+and l_shipdate < date '1994-01-01' + interval '1' year
+and l_discount between 0.06 - 0.01 and 0.06 + 0.01
+and l_quantity < 24;
+revenue
+77949.91860000002
+set debug_sync='statistics_mem_alloc_start1  WAIT_FOR second_thread_started_too';
+set debug_sync='statistics_mem_alloc_start2  SIGNAL first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+select sum(l_extendedprice*l_discount) as revenue
+from lineitem
+where l_shipdate >= date '1994-01-01' 
+and l_shipdate < date '1994-01-01' + interval '1' year
+and l_discount between 0.06 - 0.01 and 0.06 + 0.01
+and l_quantity < 24                                            ;
+set debug_sync='statistics_mem_alloc_start1  SIGNAL second_thread_started_too';
+set debug_sync='statistics_mem_alloc_start2  WAIT_FOR first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+select sum(l_extendedprice*l_discount) as revenue
+from lineitem
+where l_shipdate >= date '1994-01-01' 
+and l_shipdate < date '1994-01-01' + interval '1' year
+and l_discount between 0.06 - 0.01 and 0.06 + 0.01
+and l_quantity < 24;
+revenue
+77949.91860000002
+revenue
+77949.91860000002
+set use_stat_tables='preferably';
+set debug_sync='RESET';
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+delete from mysql.index_stat 
+where table_name='lineitem' and
+index_name in ('i_l_shipdate', 'i_l_receiptdate');
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+analyze table lineitem persistent for columns() indexes (i_l_shipdate);
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+delete from mysql.index_stat 
+where table_name='lineitem' and index_name= 'i_l_shipdate';
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+set debug_sync='statistics_collection_start1  WAIT_FOR second_thread_started_too';
+set debug_sync='statistics_collection_start2  SIGNAL first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+analyze table lineitem persistent for columns() indexes (i_l_shipdate);
+set debug_sync='statistics_collection_start1  SIGNAL second_thread_started_too';
+set debug_sync='statistics_collection_start2  WAIT_FOR first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+analyze table lineitem persistent for columns() indexes (i_l_receiptdate);
+set debug_sync='RESET';
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+DROP DATABASE dbt3_s001;
+use test;
+set use_stat_tables=@save_use_stat_tables;

=== added file 'mysql-test/r/stat_tables_par_innodb.result'
--- a/mysql-test/r/stat_tables_par_innodb.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/stat_tables_par_innodb.result	2012-07-28 00:33:23 +0000
@@ -0,0 +1,172 @@
+SET SESSION STORAGE_ENGINE='InnoDB';
+set @save_optimizer_switch_for_stat_tables_test=@@optimizer_switch;
+set optimizer_switch='extended_keys=on';
+set @save_use_stat_tables=@@use_stat_tables;
+set use_stat_tables='preferably';
+DROP DATABASE IF EXISTS dbt3_s001;
+CREATE DATABASE dbt3_s001;
+use dbt3_s001;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+select * from mysql.table_stat;
+db_name	table_name	cardinality
+dbt3_s001	customer	150
+dbt3_s001	lineitem	6005
+dbt3_s001	nation	25
+dbt3_s001	orders	1500
+dbt3_s001	part	200
+dbt3_s001	partsupp	700
+dbt3_s001	region	5
+dbt3_s001	supplier	10
+select * from mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	customer	PRIMARY	1	1.0000
+dbt3_s001	customer	i_c_nationkey	1	6.0000
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	nation	PRIMARY	1	1.0000
+dbt3_s001	nation	i_n_regionkey	1	5.0000
+dbt3_s001	orders	PRIMARY	1	1.0000
+dbt3_s001	orders	i_o_orderdate	1	1.3321
+dbt3_s001	orders	i_o_custkey	1	15.0000
+dbt3_s001	part	PRIMARY	1	1.0000
+dbt3_s001	partsupp	PRIMARY	1	3.5000
+dbt3_s001	partsupp	PRIMARY	2	1.0000
+dbt3_s001	partsupp	i_ps_partkey	1	3.5000
+dbt3_s001	partsupp	i_ps_suppkey	1	70.0000
+dbt3_s001	region	PRIMARY	1	1.0000
+dbt3_s001	supplier	PRIMARY	1	1.0000
+dbt3_s001	supplier	i_s_nationkey	1	1.1111
+flush table lineitem;
+set use_stat_tables='never';
+select sum(l_extendedprice*l_discount) as revenue
+from lineitem
+where l_shipdate >= date '1994-01-01' 
+and l_shipdate < date '1994-01-01' + interval '1' year
+and l_discount between 0.06 - 0.01 and 0.06 + 0.01
+and l_quantity < 24;
+revenue
+77949.91860000002
+set debug_sync='statistics_mem_alloc_start1  WAIT_FOR second_thread_started_too';
+set debug_sync='statistics_mem_alloc_start2  SIGNAL first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+select sum(l_extendedprice*l_discount) as revenue
+from lineitem
+where l_shipdate >= date '1994-01-01' 
+and l_shipdate < date '1994-01-01' + interval '1' year
+and l_discount between 0.06 - 0.01 and 0.06 + 0.01
+and l_quantity < 24                                            ;
+set debug_sync='statistics_mem_alloc_start1  SIGNAL second_thread_started_too';
+set debug_sync='statistics_mem_alloc_start2  WAIT_FOR first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+select sum(l_extendedprice*l_discount) as revenue
+from lineitem
+where l_shipdate >= date '1994-01-01' 
+and l_shipdate < date '1994-01-01' + interval '1' year
+and l_discount between 0.06 - 0.01 and 0.06 + 0.01
+and l_quantity < 24;
+revenue
+77949.91860000002
+revenue
+77949.91860000002
+set use_stat_tables='preferably';
+set debug_sync='RESET';
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+delete from mysql.index_stat 
+where table_name='lineitem' and
+index_name in ('i_l_shipdate', 'i_l_receiptdate');
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+analyze table lineitem persistent for columns() indexes (i_l_shipdate);
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+delete from mysql.index_stat 
+where table_name='lineitem' and index_name= 'i_l_shipdate';
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+set debug_sync='statistics_collection_start1  WAIT_FOR second_thread_started_too';
+set debug_sync='statistics_collection_start2  SIGNAL first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+analyze table lineitem persistent for columns() indexes (i_l_shipdate);
+set debug_sync='statistics_collection_start1  SIGNAL second_thread_started_too';
+set debug_sync='statistics_collection_start2  WAIT_FOR first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+analyze table lineitem persistent for columns() indexes (i_l_receiptdate);
+set debug_sync='RESET';
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+dbt3_s001	lineitem	PRIMARY	1	4.0033
+dbt3_s001	lineitem	PRIMARY	2	1.0000
+dbt3_s001	lineitem	i_l_commitdate	1	2.7160
+dbt3_s001	lineitem	i_l_orderkey	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
+dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
+dbt3_s001	lineitem	i_l_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
+dbt3_s001	lineitem	i_l_shipdate	1	2.6500
+dbt3_s001	lineitem	i_l_suppkey	1	600.5000
+dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
+dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
+DROP DATABASE dbt3_s001;
+use test;
+set use_stat_tables=@save_use_stat_tables;
+set optimizer_switch=@save_optimizer_switch_for_stat_tables_test;
+SET SESSION STORAGE_ENGINE=DEFAULT;

=== added file 'mysql-test/r/stat_tables_rbr.result'
--- a/mysql-test/r/stat_tables_rbr.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/stat_tables_rbr.result	2012-09-12 22:33:03 +0000
@@ -0,0 +1,25 @@
+#
+# Bug mdev-463: assertion failure when running ANALYZE with RBR on
+# 
+SET GLOBAL use_stat_tables = PREFERABLY;
+CREATE TABLE t1 (i INT) ENGINE=InnoDB;
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+DROP TABLE t1;
+SET GLOBAL use_stat_tables = DEFAULT;
+SET use_stat_tables = PREFERABLY;
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM PARTITION BY HASH(a) PARTITIONS 2;
+ALTER TABLE t1 ANALYZE PARTITION p1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+SHOW BINLOG EVENTS;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+master-bin.000001	4	Format_desc	1	245	Server ver: #, Binlog ver: #
+master-bin.000001	245	Query	1	345	use `test`; CREATE TABLE t1 (i INT) ENGINE=InnoDB
+master-bin.000001	345	Query	1	424	use `test`; ANALYZE TABLE t1
+master-bin.000001	424	Query	1	528	use `test`; DROP TABLE `t1` /* generated by server */
+master-bin.000001	528	Query	1	664	use `test`; CREATE TABLE t1 ( a INT ) ENGINE=MyISAM PARTITION BY HASH(a) PARTITIONS 2
+master-bin.000001	664	Query	1	762	use `test`; ALTER TABLE t1 ANALYZE PARTITION p1
+SET use_stat_tables = DEFAULT;
+DROP TABLE t1;

=== added file 'mysql-test/r/stat_tables_repl.result'
--- a/mysql-test/r/stat_tables_repl.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/stat_tables_repl.result	2012-09-11 05:22:57 +0000
@@ -0,0 +1,41 @@
+include/master-slave.inc
+[connection master]
+#
+# Bug mdev-485: unexpected failure with replication of DROP/ALTER table
+#               when RBR is on
+#
+CREATE TABLE t1 ( a int, b int ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+DROP TABLE t1;
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+DROP INDEX idx1 ON t1;
+DROP TABLE t1;
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+ALTER TABLE t1 DROP COLUMN b;
+DROP TABLE t1;
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+ALTER TABLE t1 RENAME to s;
+DROP TABLE s;
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+ALTER TABLE t1 CHANGE COLUMN b c int ;
+DROP TABLE t1;
+include/rpl_end.inc

=== added file 'mysql-test/r/statistics.result'
--- a/mysql-test/r/statistics.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/statistics.result	2012-08-19 05:18:46 +0000
@@ -0,0 +1,1230 @@
+drop table if exists t1,t2;
+set @save_use_stat_tables=@@use_stat_tables;
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+set use_stat_tables='preferably';
+CREATE TABLE t1 (
+a int NOT NULL PRIMARY KEY,
+b varchar(32),
+c char(16),
+d date,
+e double,
+f bit(3),
+INDEX idx1 (b, e), 
+INDEX idx2 (c, d),
+INDEX idx3 (d),
+INDEX idx4 (e, b, d)
+) ENGINE= MYISAM;
+INSERT INTO t1 VALUES
+(0, NULL, NULL, NULL, NULL, NULL),
+(7, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'dddddddd', '1990-05-15', 0.1, b'100'),
+(17, 'vvvvvvvvvvvvv', 'aaaa', '1989-03-12', 0.01, b'101'),
+(1, 'vvvvvvvvvvvvv', NULL, '1989-03-12', 0.01, b'100'),
+(12, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.112, b'001'),
+(23, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.1, b'100'),
+(8, 'vvvvvvvvvvvvv', 'aaaa', '1999-07-23', 0.1, b'100'),
+(22, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'aaaa', '1989-03-12', 0.112, b'001'),
+(31, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'aaaa', '1999-07-23', 0.01, b'001'),
+(10, NULL, 'aaaa', NULL, 0.01, b'010'),
+(5, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.1, b'100'),
+(15, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.1, b'010'),
+(30, NULL, 'bbbbbb', NULL, NULL, b'100'),
+(38, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, NULL, NULL),
+(18, 'zzzzzzzzzzzzzzzzzz', 'ccccccccc', '1990-05-15', 0.01, b'010'),
+(9, 'yyy', 'bbbbbb', '1998-08-28', 0.01, NULL),
+(29, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.012, b'010'),
+(3, 'yyy', 'dddddddd',  '1990-05-15', 0.112, b'010'),
+(39, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, 0.01, b'100'),
+(14, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.1, b'100'),
+(40, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', '1989-03-12', NULL, NULL),
+(44, NULL, 'aaaa', '1989-03-12', NULL, b'010'),
+(19, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.012, b'011'),
+(21, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.112, b'100'),
+(45, NULL, NULL, '1989-03-12', NULL, b'011'),
+(2, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'ccccccccc', '1990-05-15', 0.1, b'001'),
+(35, 'yyy', 'aaaa', '1990-05-15', 0.05, b'011'),
+(4, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.01, b'101'),
+(47, NULL, 'aaaa', '1990-05-15', 0.05, b'010'),
+(42, NULL, 'ccccccccc', '1989-03-12', 0.01, b'010'),
+(32, NULL, 'bbbbbb', '1990-05-15', 0.01, b'011'),
+(49, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'aaaa', '1990-05-15', NULL, NULL),
+(43, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'bbbbbb', '1990-05-15', NULL, b'100'),
+(37, 'yyy', NULL, '1989-03-12', 0.05, b'011'),
+(41, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.05, NULL),
+(34, 'yyy', NULL, NULL, NULL, NULL),
+(33, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.05, b'011'),
+(24,  'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1990-05-15', 0.01,  b'101'),
+(11, 'yyy', 'ccccccccc', '1999-07-23', 0.1, NULL),
+(25, 'zzzzzzzzzzzzzzzzzz', 'bbb', '1989-03-12', 0.01,  b'101');
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+40
+SELECT * FROM mysql.column_stat
+WHERE db_name='test' AND table_name='t1' AND column_name='a';
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+SELECT MIN(t1.a), MAX(t1.a), 
+(SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
+(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.a)",
+(SELECT COUNT(t1.a) FROM t1) /
+(SELECT COUNT(DISTINCT t1.a) FROM t1) AS "AVG_FREQUENCY(t1.a)"
+FROM t1;
+MIN(t1.a)	MAX(t1.a)	NULLS_RATIO(t1.a)	AVG_FREQUENCY(t1.a)
+0	49	0.2000	1.0000
+SELECT * FROM mysql.column_stat
+WHERE db_name='test' AND table_name='t1' AND column_name='b';
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+SELECT MIN(t1.b), MAX(t1.b), 
+(SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
+(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.b)",
+(SELECT COUNT(t1.b) FROM t1) /
+(SELECT COUNT(DISTINCT t1.b) FROM t1) AS "AVG_FREQUENCY(t1.b)"
+FROM t1;
+MIN(t1.b)	MAX(t1.b)	NULLS_RATIO(t1.b)	AVG_FREQUENCY(t1.b)
+vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	6.4000
+SELECT * FROM mysql.column_stat 
+WHERE db_name='test' AND table_name='t1' AND column_name='c';
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+SELECT MIN(t1.c), MAX(t1.c), 
+(SELECT COUNT(*) FROM t1 WHERE t1.c IS NULL) /
+(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.c)",
+(SELECT COUNT(t1.c) FROM t1) /
+(SELECT COUNT(DISTINCT t1.c) FROM t1) AS "AVG_FREQUENCY(t1.c)"
+FROM t1;
+MIN(t1.c)	MAX(t1.c)	NULLS_RATIO(t1.c)	AVG_FREQUENCY(t1.c)
+aaaa	dddddddd	0.1250	7.0000
+SELECT * FROM mysql.column_stat
+WHERE db_name='test' AND table_name='t1' AND column_name='d';
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+SELECT MIN(t1.d), MAX(t1.d), 
+(SELECT COUNT(*) FROM t1 WHERE t1.d IS NULL) /
+(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.d)",
+(SELECT COUNT(t1.d) FROM t1) /
+(SELECT COUNT(DISTINCT t1.d) FROM t1) AS "AVG_FREQUENCY(t1.d)"
+FROM t1;
+MIN(t1.d)	MAX(t1.d)	NULLS_RATIO(t1.d)	AVG_FREQUENCY(t1.d)
+1989-03-12	1999-07-23	0.1500	8.5000
+SELECT * FROM mysql.column_stat
+WHERE db_name='test' AND table_name='t1' AND column_name='e';
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+SELECT MIN(t1.e), MAX(t1.e), 
+(SELECT COUNT(*) FROM t1 WHERE t1.e IS NULL) /
+(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.e)",
+(SELECT COUNT(t1.e) FROM t1) /
+(SELECT COUNT(DISTINCT t1.e) FROM t1) AS "AVG_FREQUENCY(t1.e)"
+FROM t1;
+MIN(t1.e)	MAX(t1.e)	NULLS_RATIO(t1.e)	AVG_FREQUENCY(t1.e)
+0.01	0.112	0.2250	6.2000
+SELECT * FROM mysql.index_stat
+WHERE db_name='test' AND table_name='t1' AND index_name='idx1';
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+SELECT 
+(SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL) /
+(SELECT COUNT(DISTINCT t1.b) FROM t1 WHERE t1.b IS NOT NULL)
+AS 'ARITY 1',
+(SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL) /
+(SELECT COUNT(DISTINCT t1.b, t1.e) FROM t1
+WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL) 
+AS 'ARITY 2';
+ARITY 1	ARITY 2
+6.4000	1.6875
+SELECT * FROM mysql.index_stat
+WHERE db_name='test' AND table_name='t1' AND index_name='idx2';
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+SELECT 
+(SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL) /
+(SELECT COUNT(DISTINCT t1.c) FROM t1 WHERE t1.c IS NOT NULL) 
+AS 'ARITY 1',
+(SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL) /
+(SELECT COUNT(DISTINCT t1.c, t1.d) FROM t1
+WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL)
+AS 'ARITY 2';
+ARITY 1	ARITY 2
+7.0000	2.3846
+SELECT * FROM mysql.index_stat
+WHERE db_name='test' AND table_name='t1' AND index_name='idx3';
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	idx3	1	8.5000
+SELECT 
+(SELECT COUNT(*) FROM t1 WHERE t1.d IS NOT NULL) /
+(SELECT COUNT(DISTINCT t1.d) FROM t1 WHERE t1.d IS NOT NULL)
+AS 'ARITY 1';
+ARITY 1
+8.5000
+SELECT * FROM mysql.index_stat
+WHERE db_name='test' AND table_name='t1' AND index_name='idx4';
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+SELECT 
+(SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL) /
+(SELECT COUNT(DISTINCT t1.e) FROM t1 WHERE t1.e IS NOT NULL)
+AS 'ARITY 1',
+(SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL) /
+(SELECT COUNT(DISTINCT t1.e, t1.b) FROM t1
+WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL)
+AS 'ARITY 2',
+(SELECT COUNT(*) FROM t1
+WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL) /  
+(SELECT COUNT(DISTINCT t1.e, t1.b, t1.d) FROM t1
+WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL)
+AS 'ARITY 3';
+ARITY 1	ARITY 2	ARITY 3
+6.2000	1.6875	1.1304
+CREATE TABLE t3 (
+a int NOT NULL PRIMARY KEY,
+b varchar(32),
+c char(16),
+INDEX idx (c)
+) ENGINE=MYISAM;
+INSERT INTO t3 VALUES
+(0, NULL, NULL),
+(7, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'dddddddd'),
+(17, 'vvvvvvvvvvvvv', 'aaaa'),
+(1, 'vvvvvvvvvvvvv', NULL),
+(12, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd'),
+(23, 'vvvvvvvvvvvvv', 'dddddddd'),
+(8, 'vvvvvvvvvvvvv', 'aaaa'),
+(22, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'aaaa'),
+(31, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'aaaa'),
+(10, NULL, 'aaaa'),
+(5, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd'),
+(15, 'vvvvvvvvvvvvv', 'ccccccccc'),
+(30, NULL, 'bbbbbb'),
+(38, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb'),
+(18, 'zzzzzzzzzzzzzzzzzz', 'ccccccccc'),
+(9, 'yyy', 'bbbbbb'),
+(29, 'vvvvvvvvvvvvv', 'dddddddd');
+ANALYZE TABLE t3;
+Table	Op	Msg_type	Msg_text
+test.t3	analyze	status	OK
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+test	t3	17
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+test	t3	a	0	38	0.0000	4.0000	1.0000
+test	t3	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.1765	18.0714	2.8000
+test	t3	c	aaaa	dddddddd	0.1176	6.4000	3.7500
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+test	t3	PRIMARY	1	1.0000
+test	t3	idx	1	3.7500
+ALTER TABLE t1 RENAME TO s1;
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	s1	40
+test	t3	17
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	s1	a	0	49	0.0000	4.0000	1.0000
+test	s1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	s1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	s1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	s1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	s1	f	1	5	0.2000	1.0000	6.4000
+test	t3	a	0	38	0.0000	4.0000	1.0000
+test	t3	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.1765	18.0714	2.8000
+test	t3	c	aaaa	dddddddd	0.1176	6.4000	3.7500
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	s1	PRIMARY	1	1.0000
+test	s1	idx1	1	6.4000
+test	s1	idx1	2	1.6875
+test	s1	idx2	1	7.0000
+test	s1	idx2	2	2.3846
+test	s1	idx3	1	8.5000
+test	s1	idx4	1	6.2000
+test	s1	idx4	2	1.6875
+test	s1	idx4	3	1.1304
+test	t3	PRIMARY	1	1.0000
+test	t3	idx	1	3.7500
+RENAME TABLE s1 TO t1;
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+test	t3	17
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+test	t3	a	0	38	0.0000	4.0000	1.0000
+test	t3	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.1765	18.0714	2.8000
+test	t3	c	aaaa	dddddddd	0.1176	6.4000	3.7500
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+test	t3	PRIMARY	1	1.0000
+test	t3	idx	1	3.7500
+DROP TABLE t3;
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+CREATE TEMPORARY TABLE t0 (
+a int NOT NULL PRIMARY KEY,
+b varchar(32)
+);
+INSERT INTO t0 SELECT a,b FROM t1;
+ALTER TABLE t1 CHANGE COLUMN b x varchar(32), 
+CHANGE COLUMN e y double;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `x` varchar(32) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `y` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`x`,`y`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`y`,`x`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	x	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	y	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+ALTER TABLE t1 CHANGE COLUMN x b varchar(32), 
+CHANGE COLUMN y e double;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `b` varchar(32) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`b`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`b`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+ALTER TABLE t1 RENAME TO s1, CHANGE COLUMN b x varchar(32);
+SHOW CREATE TABLE s1;
+Table	Create Table
+s1	CREATE TABLE `s1` (
+  `a` int(11) NOT NULL,
+  `x` varchar(32) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`x`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`x`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	s1	40
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	s1	a	0	49	0.0000	4.0000	1.0000
+test	s1	x	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	s1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	s1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	s1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	s1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	s1	PRIMARY	1	1.0000
+test	s1	idx1	1	6.4000
+test	s1	idx1	2	1.6875
+test	s1	idx2	1	7.0000
+test	s1	idx2	2	2.3846
+test	s1	idx3	1	8.5000
+test	s1	idx4	1	6.2000
+test	s1	idx4	2	1.6875
+test	s1	idx4	3	1.1304
+ALTER TABLE s1 RENAME TO t1, CHANGE COLUMN x b varchar(32);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `b` varchar(32) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`b`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`b`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+ALTER TABLE t1 CHANGE COLUMN b x varchar(30);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `x` varchar(30) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`x`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`x`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+ALTER TABLE t1 CHANGE COLUMN x b varchar(32);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `b` varchar(32) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`b`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`b`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx4);
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx4	3	1.1304
+test	t1	idx4	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx1	2	1.6875
+test	t1	idx1	1	6.4000
+SELECT * INTO OUTFILE 'MYSQLTEST_VARDIR/tmp/save_column_stat'
+  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n'
+  FROM mysql.column_stat WHERE column_name='b';
+SELECT * INTO OUTFILE 'MYSQLTEST_VARDIR/tmp/save_index_stat'
+  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n'
+  FROM mysql.index_stat WHERE index_name IN ('idx1', 'idx4');
+ALTER TABLE t1 CHANGE COLUMN b x varchar(30);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `x` varchar(30) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`x`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`x`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx4	3	1.1304
+test	t1	idx4	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t1	idx1	2	1.6875
+test	t1	idx1	1	6.4000
+ALTER TABLE t1 CHANGE COLUMN x b varchar(32);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `b` varchar(32) DEFAULT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`b`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`b`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/save_column_stat'
+  INTO TABLE mysql.column_stat
+FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n';
+LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/save_index_stat'
+  INTO TABLE mysql.index_stat
+FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n';
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx4	3	1.1304
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t1	idx4	2	1.6875
+test	t1	idx4	1	6.2000
+test	t1	idx1	2	1.6875
+test	t1	idx1	1	6.4000
+ALTER TABLE t1 DROP COLUMN b;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+DROP INDEX idx2 ON t1;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx1` (`e`),
+  KEY `idx3` (`d`),
+  KEY `idx4` (`e`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx3	1	8.5000
+DROP INDEX idx1 ON t1;
+DROP INDEX idx4 ON t1;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx3` (`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ALTER TABLE t1 ADD COLUMN b varchar(32);
+CREATE INDEX idx1 ON t1(b, e);
+CREATE INDEX idx2 ON t1(c, d);
+CREATE INDEX idx4 ON t1(e, b, d);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  `b` varchar(32) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx3` (`d`),
+  KEY `idx1` (`b`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx4` (`e`,`b`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx3	1	8.5000
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	NULL	NULL	1.0000	NULL	NULL
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx2	1	7.0000
+test	t1	idx1	2	NULL
+test	t1	idx1	1	NULL
+test	t1	idx3	1	8.5000
+test	t1	idx2	2	2.3846
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	NULL
+test	t1	idx4	3	NULL
+UPDATE t1 SET b=(SELECT b FROM t0 WHERE t0.a= t1.a);
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx2	1	7.0000
+test	t1	idx1	2	1.6875
+test	t1	idx1	1	6.4000
+test	t1	idx3	1	8.5000
+test	t1	idx2	2	2.3846
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+ALTER TABLE t1 DROP COLUMN b,
+DROP INDEX idx1, DROP INDEX idx2, DROP INDEX idx4;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx3` (`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx3	1	8.5000
+ALTER TABLE t1 ADD COLUMN b varchar(32);
+ALTER TABLE t1 
+ADD INDEX idx1 (b, e), ADD INDEX idx2 (c, d), ADD INDEX idx4 (e, b, d);
+UPDATE t1 SET b=(SELECT b FROM t0 WHERE t0.a= t1.a);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL,
+  `c` char(16) DEFAULT NULL,
+  `d` date DEFAULT NULL,
+  `e` double DEFAULT NULL,
+  `f` bit(3) DEFAULT NULL,
+  `b` varchar(32) DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  KEY `idx3` (`d`),
+  KEY `idx1` (`b`,`e`),
+  KEY `idx2` (`c`,`d`),
+  KEY `idx4` (`e`,`b`,`d`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx3	1	8.5000
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx3	1	8.5000
+test	t1	idx2	2	2.3846
+test	t1	idx2	1	7.0000
+test	t1	idx1	2	1.6875
+test	t1	idx1	1	6.4000
+test	t1	idx4	3	1.1304
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS() INDEXES();
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Table is already up to date
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(c,e,b) INDEXES(idx2,idx4);
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Table is already up to date
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+DELETE FROM mysql.index_stat WHERE table_name='t1' AND index_name='primary';
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS() INDEXES(primary);
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Table is already up to date
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+test	t1	PRIMARY	1	1.0000
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS ALL INDEXES ALL;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Table is already up to date
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx3	1	8.5000
+test	t1	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+CREATE TABLE t2 LIKE t1;
+ALTER TABLE t2 ENGINE=InnoDB;
+INSERT INTO t2 SELECT * FROM t1;
+ANALYZE TABLE t2;
+Table	Op	Msg_type	Msg_text
+test.t2	analyze	status	OK
+SELECT * FROM mysql.table_stat;
+db_name	table_name	cardinality
+test	t1	40
+test	t2	40
+SELECT * FROM mysql.column_stat ORDER BY column_name;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t2	a	0	49	0.0000	4.0000	1.0000
+test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t2	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t2	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t2	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t2	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+test	t2	f	1	5	0.2000	1.0000	6.4000
+SELECT * FROM mysql.index_stat ORDER BY index_name, prefix_arity, table_name;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t2	PRIMARY	1	1.0000
+test	t1	idx1	1	6.4000
+test	t2	idx1	1	6.4000
+test	t1	idx1	2	1.6875
+test	t2	idx1	2	1.6875
+test	t1	idx2	1	7.0000
+test	t2	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t2	idx2	2	2.3846
+test	t1	idx3	1	8.5000
+test	t2	idx3	1	8.5000
+test	t1	idx4	1	6.2000
+test	t2	idx4	1	6.2000
+test	t1	idx4	2	1.6875
+test	t2	idx4	2	1.6875
+test	t1	idx4	3	1.1304
+test	t2	idx4	3	1.1304
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+ALTER TABLE t1
+DROP INDEX idx1,
+DROP INDEX idx4;
+ALTER TABLE t1
+MODIFY COLUMN b text,
+ADD INDEX idx1 (b(4), e), 
+ADD INDEX idx4 (e, b(4), d);
+ANALYZE TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+SELECT * FROM mysql.column_stat;
+db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+test	t1	a	0	49	0.0000	4.0000	1.0000
+test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
+test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
+test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
+test	t1	f	1	5	0.2000	1.0000	6.4000
+test	t1	b	NULL	NULL	0.2000	17.1250	NULL
+SELECT * FROM mysql.index_stat;
+db_name	table_name	index_name	prefix_arity	avg_frequency
+test	t1	PRIMARY	1	1.0000
+test	t1	idx3	1	8.5000
+test	t1	idx2	1	7.0000
+test	t1	idx2	2	2.3846
+test	t1	idx1	1	NULL
+test	t1	idx1	2	NULL
+test	t1	idx4	1	6.2000
+test	t1	idx4	2	NULL
+test	t1	idx4	3	NULL
+DROP TABLE t1,t2;
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+set use_stat_tables='never';
+set names utf8;
+CREATE DATABASE world;
+use world;
+CREATE TABLE Country (
+Code char(3) NOT NULL default '',
+Name char(52) NOT NULL default '',
+SurfaceArea float(10,2) NOT NULL default '0.00',
+Population int(11) NOT NULL default '0',
+Capital int(11) default NULL,
+PRIMARY KEY  (Code),
+UNIQUE INDEX (Name)
+) CHARACTER SET utf8 COLLATE utf8_bin;
+CREATE TABLE City (
+ID int(11) NOT NULL auto_increment,
+Name char(35) NOT NULL default '',
+Country char(3) NOT NULL default '',
+Population int(11) NOT NULL default '0',
+PRIMARY KEY  (ID),
+INDEX (Population),
+INDEX (Country) 
+) CHARACTER SET utf8 COLLATE utf8_bin;
+CREATE TABLE CountryLanguage (
+Country char(3) NOT NULL default '',
+Language char(30) NOT NULL default '',
+Percentage float(3,1) NOT NULL default '0.0',
+PRIMARY KEY  (Country, Language),
+INDEX (Percentage)
+) CHARACTER SET utf8 COLLATE utf8_bin;
+set use_stat_tables='preferably';
+ANALYZE TABLE Country, City, CountryLanguage;
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+FROM mysql.table_stat;
+UPPER(db_name)	UPPER(table_name)	cardinality
+WORLD	COUNTRY	239
+WORLD	CITY	4079
+WORLD	COUNTRYLANGUAGE	984
+SELECT UPPER(db_name), UPPER(table_name), 
+column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+FROM mysql.column_stat;
+UPPER(db_name)	UPPER(table_name)	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+WORLD	COUNTRY	Code	ABW	ZWE	0.0000	3.0000	1.0000
+WORLD	COUNTRY	Name	Afghanistan	Zimbabwe	0.0000	10.1088	1.0000
+WORLD	COUNTRY	SurfaceArea	0.40	17075400.00	0.0000	4.0000	1.0042
+WORLD	COUNTRY	Population	0	1277558000	0.0000	4.0000	1.0575
+WORLD	COUNTRY	Capital	1	4074	0.0293	4.0000	1.0000
+WORLD	CITY	ID	1	4079	0.0000	4.0000	1.0000
+WORLD	CITY	Name	A Coru??a (La Coru??a)	??rgenc	0.0000	8.6416	1.0195
+WORLD	CITY	Country	ABW	ZWE	0.0000	3.0000	17.5819
+WORLD	CITY	Population	42	10500000	0.0000	4.0000	1.0467
+WORLD	COUNTRYLANGUAGE	Country	ABW	ZWE	0.0000	3.0000	4.2232
+WORLD	COUNTRYLANGUAGE	Language	Abhyasi	[South]Mande	0.0000	7.1778	2.1532
+WORLD	COUNTRYLANGUAGE	Percentage	0.0	99.9	0.0000	4.0000	2.7640
+SELECT UPPER(db_name), UPPER(table_name),
+index_name, prefix_arity, avg_frequency
+FROM mysql.index_stat;
+UPPER(db_name)	UPPER(table_name)	index_name	prefix_arity	avg_frequency
+WORLD	COUNTRY	PRIMARY	1	1.0000
+WORLD	COUNTRY	Name	1	1.0000
+WORLD	CITY	PRIMARY	1	1.0000
+WORLD	CITY	Population	1	1.0467
+WORLD	CITY	Country	1	17.5819
+WORLD	COUNTRYLANGUAGE	PRIMARY	1	4.2232
+WORLD	COUNTRYLANGUAGE	PRIMARY	2	1.0000
+WORLD	COUNTRYLANGUAGE	Percentage	1	2.7640
+use test;
+set use_stat_tables='never';
+CREATE DATABASE world_innodb;
+use world_innodb;
+CREATE TABLE Country (
+Code char(3) NOT NULL default '',
+Name char(52) NOT NULL default '',
+SurfaceArea float(10,2) NOT NULL default '0.00',
+Population int(11) NOT NULL default '0',
+Capital int(11) default NULL,
+PRIMARY KEY  (Code),
+UNIQUE INDEX (Name)
+) CHARACTER SET utf8 COLLATE utf8_bin;
+CREATE TABLE City (
+ID int(11) NOT NULL auto_increment,
+Name char(35) NOT NULL default '',
+Country char(3) NOT NULL default '',
+Population int(11) NOT NULL default '0',
+PRIMARY KEY  (ID),
+INDEX (Population),
+INDEX (Country) 
+) CHARACTER SET utf8 COLLATE utf8_bin;
+CREATE TABLE CountryLanguage (
+Country char(3) NOT NULL default '',
+Language char(30) NOT NULL default '',
+Percentage float(3,1) NOT NULL default '0.0',
+PRIMARY KEY  (Country, Language),
+INDEX (Percentage)
+) CHARACTER SET utf8 COLLATE utf8_bin;
+ALTER TABLE Country ENGINE=InnoDB;
+ALTER TABLE City ENGINE=InnoDB;
+ALTER TABLE CountryLanguage ENGINE=InnoDB;
+set use_stat_tables='preferably';
+ANALYZE TABLE Country, City, CountryLanguage;
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+FROM mysql.table_stat;
+UPPER(db_name)	UPPER(table_name)	cardinality
+WORLD	COUNTRY	239
+WORLD	CITY	4079
+WORLD	COUNTRYLANGUAGE	984
+WORLD_INNODB	COUNTRY	239
+WORLD_INNODB	CITY	4079
+WORLD_INNODB	COUNTRYLANGUAGE	984
+SELECT UPPER(db_name), UPPER(table_name), 
+column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+FROM mysql.column_stat;
+UPPER(db_name)	UPPER(table_name)	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+WORLD	COUNTRY	Code	ABW	ZWE	0.0000	3.0000	1.0000
+WORLD	COUNTRY	Name	Afghanistan	Zimbabwe	0.0000	10.1088	1.0000
+WORLD	COUNTRY	SurfaceArea	0.40	17075400.00	0.0000	4.0000	1.0042
+WORLD	COUNTRY	Population	0	1277558000	0.0000	4.0000	1.0575
+WORLD	COUNTRY	Capital	1	4074	0.0293	4.0000	1.0000
+WORLD	CITY	ID	1	4079	0.0000	4.0000	1.0000
+WORLD	CITY	Name	A Coru??a (La Coru??a)	??rgenc	0.0000	8.6416	1.0195
+WORLD	CITY	Country	ABW	ZWE	0.0000	3.0000	17.5819
+WORLD	CITY	Population	42	10500000	0.0000	4.0000	1.0467
+WORLD	COUNTRYLANGUAGE	Country	ABW	ZWE	0.0000	3.0000	4.2232
+WORLD	COUNTRYLANGUAGE	Language	Abhyasi	[South]Mande	0.0000	7.1778	2.1532
+WORLD	COUNTRYLANGUAGE	Percentage	0.0	99.9	0.0000	4.0000	2.7640
+WORLD_INNODB	COUNTRY	Code	ABW	ZWE	0.0000	3.0000	1.0000
+WORLD_INNODB	COUNTRY	Name	Afghanistan	Zimbabwe	0.0000	10.1088	1.0000
+WORLD_INNODB	COUNTRY	SurfaceArea	0.40	17075400.00	0.0000	4.0000	1.0042
+WORLD_INNODB	COUNTRY	Population	0	1277558000	0.0000	4.0000	1.0575
+WORLD_INNODB	COUNTRY	Capital	1	4074	0.0293	4.0000	1.0000
+WORLD_INNODB	CITY	ID	1	4079	0.0000	4.0000	1.0000
+WORLD_INNODB	CITY	Name	A Coru??a (La Coru??a)	??rgenc	0.0000	8.6416	1.0195
+WORLD_INNODB	CITY	Country	ABW	ZWE	0.0000	3.0000	17.5819
+WORLD_INNODB	CITY	Population	42	10500000	0.0000	4.0000	1.0467
+WORLD_INNODB	COUNTRYLANGUAGE	Country	ABW	ZWE	0.0000	3.0000	4.2232
+WORLD_INNODB	COUNTRYLANGUAGE	Language	Abhyasi	[South]Mande	0.0000	7.1778	2.1532
+WORLD_INNODB	COUNTRYLANGUAGE	Percentage	0.0	99.9	0.0000	4.0000	2.7640
+SELECT UPPER(db_name), UPPER(table_name),
+index_name, prefix_arity, avg_frequency
+FROM mysql.index_stat;
+UPPER(db_name)	UPPER(table_name)	index_name	prefix_arity	avg_frequency
+WORLD	COUNTRY	PRIMARY	1	1.0000
+WORLD	COUNTRY	Name	1	1.0000
+WORLD	CITY	PRIMARY	1	1.0000
+WORLD	CITY	Population	1	1.0467
+WORLD	CITY	Country	1	17.5819
+WORLD	COUNTRYLANGUAGE	PRIMARY	1	4.2232
+WORLD	COUNTRYLANGUAGE	PRIMARY	2	1.0000
+WORLD	COUNTRYLANGUAGE	Percentage	1	2.7640
+WORLD_INNODB	COUNTRY	PRIMARY	1	1.0000
+WORLD_INNODB	COUNTRY	Name	1	1.0000
+WORLD_INNODB	CITY	PRIMARY	1	1.0000
+WORLD_INNODB	CITY	Population	1	1.0467
+WORLD_INNODB	CITY	Country	1	17.5819
+WORLD_INNODB	COUNTRYLANGUAGE	PRIMARY	1	4.2232
+WORLD_INNODB	COUNTRYLANGUAGE	PRIMARY	2	1.0000
+WORLD_INNODB	COUNTRYLANGUAGE	Percentage	1	2.7640
+use test;
+DROP DATABASE world;
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+FROM mysql.table_stat;
+UPPER(db_name)	UPPER(table_name)	cardinality
+WORLD_INNODB	COUNTRY	239
+WORLD_INNODB	CITY	4079
+WORLD_INNODB	COUNTRYLANGUAGE	984
+SELECT UPPER(db_name), UPPER(table_name), 
+column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+FROM mysql.column_stat;
+UPPER(db_name)	UPPER(table_name)	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+WORLD_INNODB	COUNTRY	Code	ABW	ZWE	0.0000	3.0000	1.0000
+WORLD_INNODB	COUNTRY	Name	Afghanistan	Zimbabwe	0.0000	10.1088	1.0000
+WORLD_INNODB	COUNTRY	SurfaceArea	0.40	17075400.00	0.0000	4.0000	1.0042
+WORLD_INNODB	COUNTRY	Population	0	1277558000	0.0000	4.0000	1.0575
+WORLD_INNODB	COUNTRY	Capital	1	4074	0.0293	4.0000	1.0000
+WORLD_INNODB	CITY	ID	1	4079	0.0000	4.0000	1.0000
+WORLD_INNODB	CITY	Name	A Coru??a (La Coru??a)	??rgenc	0.0000	8.6416	1.0195
+WORLD_INNODB	CITY	Country	ABW	ZWE	0.0000	3.0000	17.5819
+WORLD_INNODB	CITY	Population	42	10500000	0.0000	4.0000	1.0467
+WORLD_INNODB	COUNTRYLANGUAGE	Country	ABW	ZWE	0.0000	3.0000	4.2232
+WORLD_INNODB	COUNTRYLANGUAGE	Language	Abhyasi	[South]Mande	0.0000	7.1778	2.1532
+WORLD_INNODB	COUNTRYLANGUAGE	Percentage	0.0	99.9	0.0000	4.0000	2.7640
+SELECT UPPER(db_name), UPPER(table_name),
+index_name, prefix_arity, avg_frequency
+FROM mysql.index_stat;
+UPPER(db_name)	UPPER(table_name)	index_name	prefix_arity	avg_frequency
+WORLD_INNODB	COUNTRY	PRIMARY	1	1.0000
+WORLD_INNODB	COUNTRY	Name	1	1.0000
+WORLD_INNODB	CITY	PRIMARY	1	1.0000
+WORLD_INNODB	CITY	Population	1	1.0467
+WORLD_INNODB	CITY	Country	1	17.5819
+WORLD_INNODB	COUNTRYLANGUAGE	PRIMARY	1	4.2232
+WORLD_INNODB	COUNTRYLANGUAGE	PRIMARY	2	1.0000
+WORLD_INNODB	COUNTRYLANGUAGE	Percentage	1	2.7640
+DROP DATABASE world_innodb;
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+FROM mysql.table_stat;
+UPPER(db_name)	UPPER(table_name)	cardinality
+SELECT UPPER(db_name), UPPER(table_name), 
+column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+FROM mysql.column_stat;
+UPPER(db_name)	UPPER(table_name)	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
+SELECT UPPER(db_name), UPPER(table_name),
+index_name, prefix_arity, avg_frequency
+FROM mysql.index_stat;
+UPPER(db_name)	UPPER(table_name)	index_name	prefix_arity	avg_frequency
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+set use_stat_tables=@save_use_stat_tables;

=== modified file 'mysql-test/r/status_user.result'
--- a/mysql-test/r/status_user.result	2012-04-17 18:25:03 +0000
+++ b/mysql-test/r/status_user.result	2012-07-10 23:34:39 +0000
@@ -107,7 +107,7 @@
 Handler_mrr_rowid_refills	0
 Handler_prepare	18
 Handler_read_first	0
-Handler_read_key	3
+Handler_read_key	9
 Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
@@ -123,7 +123,7 @@
 Handler_write	7
 select variable_value - @global_read_key as "handler_read_key" from information_schema.global_status where variable_name="handler_read_key";
 handler_read_key
-3
+9
 set @@global.userstat=0;
 select * from information_schema.index_statistics;
 TABLE_SCHEMA	TABLE_NAME	INDEX_NAME	ROWS_READ

=== modified file 'mysql-test/r/system_mysql_db.result'
--- a/mysql-test/r/system_mysql_db.result	2011-11-22 17:04:38 +0000
+++ b/mysql-test/r/system_mysql_db.result	2012-06-26 05:33:07 +0000
@@ -1,5 +1,6 @@
 show tables;
 Tables_in_db
+column_stat
 columns_priv
 db
 event
@@ -10,6 +11,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -17,6 +19,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second
@@ -264,5 +267,36 @@
   `server_id` int(10) unsigned NOT NULL,
   `sql_text` mediumtext NOT NULL
 ) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log'
+show create table table_stat;
+Table	Create Table
+table_stat	CREATE TABLE `table_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `cardinality` bigint(21) unsigned DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Tables'
+show create table column_stat;
+Table	Create Table
+column_stat	CREATE TABLE `column_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `column_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `min_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `max_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `nulls_ratio` decimal(12,4) DEFAULT NULL,
+  `avg_length` decimal(12,4) DEFAULT NULL,
+  `avg_frequency` decimal(12,4) DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`column_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Columns'
+show create table index_stat;
+Table	Create Table
+index_stat	CREATE TABLE `index_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `index_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `prefix_arity` int(11) unsigned NOT NULL,
+  `avg_frequency` decimal(12,4) DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`index_name`,`prefix_arity`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Indexes'
 show tables;
 Tables_in_test

=== modified file 'mysql-test/r/system_mysql_db_fix40123.result'
--- a/mysql-test/r/system_mysql_db_fix40123.result	2012-02-06 17:42:18 +0000
+++ b/mysql-test/r/system_mysql_db_fix40123.result	2012-03-19 08:35:32 +0000
@@ -1,5 +1,6 @@
 show tables;
 Tables_in_db
+column_stat
 columns_priv
 db
 event
@@ -10,6 +11,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -17,6 +19,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second
@@ -264,5 +267,36 @@
   `server_id` int(10) unsigned NOT NULL,
   `sql_text` mediumtext NOT NULL
 ) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log'
+show create table table_stat;
+Table	Create Table
+table_stat	CREATE TABLE `table_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `cardinality` bigint(21) unsigned DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Tables'
+show create table column_stat;
+Table	Create Table
+column_stat	CREATE TABLE `column_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `column_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `min_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `max_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `nulls_ratio` double DEFAULT NULL,
+  `avg_length` double DEFAULT NULL,
+  `avg_frequency` double DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`column_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Columns'
+show create table index_stat;
+Table	Create Table
+index_stat	CREATE TABLE `index_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `index_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `prefix_arity` int(11) unsigned NOT NULL,
+  `avg_frequency` double DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`index_name`,`prefix_arity`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Indexes'
 show tables;
 Tables_in_test

=== modified file 'mysql-test/r/system_mysql_db_fix50030.result'
--- a/mysql-test/r/system_mysql_db_fix50030.result	2012-02-06 17:42:18 +0000
+++ b/mysql-test/r/system_mysql_db_fix50030.result	2012-03-19 08:35:32 +0000
@@ -1,5 +1,6 @@
 show tables;
 Tables_in_db
+column_stat
 columns_priv
 db
 event
@@ -10,6 +11,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -17,6 +19,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second
@@ -264,5 +267,36 @@
   `server_id` int(10) unsigned NOT NULL,
   `sql_text` mediumtext NOT NULL
 ) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log'
+show create table table_stat;
+Table	Create Table
+table_stat	CREATE TABLE `table_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `cardinality` bigint(21) unsigned DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Tables'
+show create table column_stat;
+Table	Create Table
+column_stat	CREATE TABLE `column_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `column_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `min_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `max_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `nulls_ratio` double DEFAULT NULL,
+  `avg_length` double DEFAULT NULL,
+  `avg_frequency` double DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`column_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Columns'
+show create table index_stat;
+Table	Create Table
+index_stat	CREATE TABLE `index_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `index_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `prefix_arity` int(11) unsigned NOT NULL,
+  `avg_frequency` double DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`index_name`,`prefix_arity`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Indexes'
 show tables;
 Tables_in_test

=== modified file 'mysql-test/r/system_mysql_db_fix50117.result'
--- a/mysql-test/r/system_mysql_db_fix50117.result	2012-02-06 17:42:18 +0000
+++ b/mysql-test/r/system_mysql_db_fix50117.result	2012-03-19 08:35:32 +0000
@@ -1,5 +1,6 @@
 show tables;
 Tables_in_db
+column_stat
 columns_priv
 db
 event
@@ -10,6 +11,7 @@
 help_relation
 help_topic
 host
+index_stat
 ndb_binlog_index
 plugin
 proc
@@ -17,6 +19,7 @@
 proxies_priv
 servers
 slow_log
+table_stat
 tables_priv
 time_zone
 time_zone_leap_second
@@ -264,5 +267,36 @@
   `server_id` int(10) unsigned NOT NULL,
   `sql_text` mediumtext NOT NULL
 ) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log'
+show create table table_stat;
+Table	Create Table
+table_stat	CREATE TABLE `table_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `cardinality` bigint(21) unsigned DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Tables'
+show create table column_stat;
+Table	Create Table
+column_stat	CREATE TABLE `column_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `column_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `min_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `max_value` varchar(255) COLLATE utf8_bin DEFAULT NULL,
+  `nulls_ratio` double DEFAULT NULL,
+  `avg_length` double DEFAULT NULL,
+  `avg_frequency` double DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`column_name`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Columns'
+show create table index_stat;
+Table	Create Table
+index_stat	CREATE TABLE `index_stat` (
+  `db_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `table_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `index_name` varchar(64) COLLATE utf8_bin NOT NULL,
+  `prefix_arity` int(11) unsigned NOT NULL,
+  `avg_frequency` double DEFAULT NULL,
+  PRIMARY KEY (`db_name`,`table_name`,`index_name`,`prefix_arity`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Statistics on Indexes'
 show tables;
 Tables_in_test

=== modified file 'mysql-test/suite/funcs_1/r/is_columns_mysql.result'
--- a/mysql-test/suite/funcs_1/r/is_columns_mysql.result	2011-11-22 17:04:38 +0000
+++ b/mysql-test/suite/funcs_1/r/is_columns_mysql.result	2012-06-26 05:33:07 +0000
@@ -9,6 +9,14 @@
 def	mysql	columns_priv	Table_name	4		NO	char	64	192	NULL	NULL	NULL	utf8	utf8_bin	char(64)	PRI		select,insert,update,references	
 def	mysql	columns_priv	Timestamp	6	CURRENT_TIMESTAMP	NO	timestamp	NULL	NULL	NULL	NULL	0	NULL	NULL	timestamp		on update CURRENT_TIMESTAMP	select,insert,update,references	
 def	mysql	columns_priv	User	3		NO	char	16	48	NULL	NULL	NULL	utf8	utf8_bin	char(16)	PRI		select,insert,update,references	
+def	mysql	column_stat	avg_frequency	8	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)			select,insert,update,references	
+def	mysql	column_stat	avg_length	7	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)			select,insert,update,references	
+def	mysql	column_stat	column_name	3	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
+def	mysql	column_stat	db_name	1	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
+def	mysql	column_stat	max_value	5	NULL	YES	varchar	255	765	NULL	NULL	NULL	utf8	utf8_bin	varchar(255)			select,insert,update,references	
+def	mysql	column_stat	min_value	4	NULL	YES	varchar	255	765	NULL	NULL	NULL	utf8	utf8_bin	varchar(255)			select,insert,update,references	
+def	mysql	column_stat	nulls_ratio	6	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)			select,insert,update,references	
+def	mysql	column_stat	table_name	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
 def	mysql	db	Alter_priv	13	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')			select,insert,update,references	
 def	mysql	db	Alter_routine_priv	19	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')			select,insert,update,references	
 def	mysql	db	Create_priv	8	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')			select,insert,update,references	
@@ -97,6 +105,11 @@
 def	mysql	host	Show_view_priv	16	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')			select,insert,update,references	
 def	mysql	host	Trigger_priv	20	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')			select,insert,update,references	
 def	mysql	host	Update_priv	5	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')			select,insert,update,references	
+def	mysql	index_stat	avg_frequency	5	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)			select,insert,update,references	
+def	mysql	index_stat	db_name	1	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
+def	mysql	index_stat	index_name	3	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
+def	mysql	index_stat	prefix_arity	4	NULL	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(11) unsigned	PRI		select,insert,update,references	
+def	mysql	index_stat	table_name	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
 def	mysql	ndb_binlog_index	deletes	6	NULL	NO	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(20) unsigned			select,insert,update,references	
 def	mysql	ndb_binlog_index	epoch	3	NULL	NO	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(20) unsigned	PRI		select,insert,update,references	
 def	mysql	ndb_binlog_index	File	2	NULL	NO	varchar	255	255	NULL	NULL	NULL	latin1	latin1_swedish_ci	varchar(255)			select,insert,update,references	
@@ -169,6 +182,9 @@
 def	mysql	tables_priv	Table_priv	7		NO	set	98	294	NULL	NULL	NULL	utf8	utf8_general_ci	set('Select','Insert','Update','Delete','Create','Drop','Grant','References','Index','Alter','Create View','Show view','Trigger')			select,insert,update,references	
 def	mysql	tables_priv	Timestamp	6	CURRENT_TIMESTAMP	NO	timestamp	NULL	NULL	NULL	NULL	0	NULL	NULL	timestamp		on update CURRENT_TIMESTAMP	select,insert,update,references	
 def	mysql	tables_priv	User	3		NO	char	16	48	NULL	NULL	NULL	utf8	utf8_bin	char(16)	PRI		select,insert,update,references	
+def	mysql	table_stat	cardinality	3	NULL	YES	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(21) unsigned			select,insert,update,references	
+def	mysql	table_stat	db_name	1	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
+def	mysql	table_stat	table_name	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI		select,insert,update,references	
 def	mysql	time_zone	Time_zone_id	1	NULL	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(10) unsigned	PRI	auto_increment	select,insert,update,references	
 def	mysql	time_zone	Use_leap_seconds	2	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('Y','N')			select,insert,update,references	
 def	mysql	time_zone_leap_second	Correction	2	NULL	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(11)			select,insert,update,references	
@@ -258,6 +274,7 @@
 COL_CML	DATA_TYPE	CHARACTER_SET_NAME	COLLATION_NAME
 3.0000	char	utf8	utf8_bin
 3.0000	enum	utf8	utf8_bin
+3.0000	varchar	utf8	utf8_bin
 3.0000	char	utf8	utf8_general_ci
 3.0000	enum	utf8	utf8_general_ci
 3.0000	set	utf8	utf8_general_ci
@@ -274,6 +291,7 @@
 COL_CML	DATA_TYPE	CHARACTER_SET_NAME	COLLATION_NAME
 NULL	bigint	NULL	NULL
 NULL	datetime	NULL	NULL
+NULL	decimal	NULL	NULL
 NULL	int	NULL	NULL
 NULL	smallint	NULL	NULL
 NULL	time	NULL	NULL
@@ -302,6 +320,14 @@
 3.0000	mysql	columns_priv	Column_name	char	64	192	utf8	utf8_bin	char(64)
 NULL	mysql	columns_priv	Timestamp	timestamp	NULL	NULL	NULL	NULL	timestamp
 3.0000	mysql	columns_priv	Column_priv	set	31	93	utf8	utf8_general_ci	set('Select','Insert','Update','References')
+3.0000	mysql	column_stat	db_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	column_stat	table_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	column_stat	column_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	column_stat	min_value	varchar	255	765	utf8	utf8_bin	varchar(255)
+3.0000	mysql	column_stat	max_value	varchar	255	765	utf8	utf8_bin	varchar(255)
+NULL	mysql	column_stat	nulls_ratio	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
+NULL	mysql	column_stat	avg_length	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
+NULL	mysql	column_stat	avg_frequency	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
 3.0000	mysql	db	Host	char	60	180	utf8	utf8_bin	char(60)
 3.0000	mysql	db	Db	char	64	192	utf8	utf8_bin	char(64)
 3.0000	mysql	db	User	char	16	48	utf8	utf8_bin	char(16)
@@ -390,6 +416,11 @@
 3.0000	mysql	host	Alter_routine_priv	enum	1	3	utf8	utf8_general_ci	enum('N','Y')
 3.0000	mysql	host	Execute_priv	enum	1	3	utf8	utf8_general_ci	enum('N','Y')
 3.0000	mysql	host	Trigger_priv	enum	1	3	utf8	utf8_general_ci	enum('N','Y')
+3.0000	mysql	index_stat	db_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	index_stat	table_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	index_stat	index_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+NULL	mysql	index_stat	prefix_arity	int	NULL	NULL	NULL	NULL	int(11) unsigned
+NULL	mysql	index_stat	avg_frequency	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
 NULL	mysql	ndb_binlog_index	Position	bigint	NULL	NULL	NULL	NULL	bigint(20) unsigned
 1.0000	mysql	ndb_binlog_index	File	varchar	255	255	latin1	latin1_swedish_ci	varchar(255)
 NULL	mysql	ndb_binlog_index	epoch	bigint	NULL	NULL	NULL	NULL	bigint(20) unsigned
@@ -462,6 +493,9 @@
 NULL	mysql	tables_priv	Timestamp	timestamp	NULL	NULL	NULL	NULL	timestamp
 3.0000	mysql	tables_priv	Table_priv	set	98	294	utf8	utf8_general_ci	set('Select','Insert','Update','Delete','Create','Drop','Grant','References','Index','Alter','Create View','Show view','Trigger')
 3.0000	mysql	tables_priv	Column_priv	set	31	93	utf8	utf8_general_ci	set('Select','Insert','Update','References')
+3.0000	mysql	table_stat	db_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	table_stat	table_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+NULL	mysql	table_stat	cardinality	bigint	NULL	NULL	NULL	NULL	bigint(21) unsigned
 NULL	mysql	time_zone	Time_zone_id	int	NULL	NULL	NULL	NULL	int(10) unsigned
 3.0000	mysql	time_zone	Use_leap_seconds	enum	1	3	utf8	utf8_general_ci	enum('Y','N')
 NULL	mysql	time_zone_leap_second	Transition_time	bigint	NULL	NULL	NULL	NULL	bigint(20)

=== modified file 'mysql-test/suite/funcs_1/r/is_columns_mysql_embedded.result'
--- a/mysql-test/suite/funcs_1/r/is_columns_mysql_embedded.result	2012-01-26 15:55:40 +0000
+++ b/mysql-test/suite/funcs_1/r/is_columns_mysql_embedded.result	2012-07-11 05:12:23 +0000
@@ -9,6 +9,14 @@
 def	mysql	columns_priv	Table_name	4		NO	char	64	192	NULL	NULL	NULL	utf8	utf8_bin	char(64)	PRI			
 def	mysql	columns_priv	Timestamp	6	CURRENT_TIMESTAMP	NO	timestamp	NULL	NULL	NULL	NULL	0	NULL	NULL	timestamp		on update CURRENT_TIMESTAMP		
 def	mysql	columns_priv	User	3		NO	char	16	48	NULL	NULL	NULL	utf8	utf8_bin	char(16)	PRI			
+def	mysql	column_stat	avg_frequency	8	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)				
+def	mysql	column_stat	avg_length	7	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)				
+def	mysql	column_stat	column_name	3	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
+def	mysql	column_stat	db_name	1	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
+def	mysql	column_stat	max_value	5	NULL	YES	varchar	255	765	NULL	NULL	NULL	utf8	utf8_bin	varchar(255)				
+def	mysql	column_stat	min_value	4	NULL	YES	varchar	255	765	NULL	NULL	NULL	utf8	utf8_bin	varchar(255)				
+def	mysql	column_stat	nulls_ratio	6	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)				
+def	mysql	column_stat	table_name	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
 def	mysql	db	Alter_priv	13	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')				
 def	mysql	db	Alter_routine_priv	19	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')				
 def	mysql	db	Create_priv	8	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')				
@@ -97,6 +105,11 @@
 def	mysql	host	Show_view_priv	16	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')				
 def	mysql	host	Trigger_priv	20	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')				
 def	mysql	host	Update_priv	5	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('N','Y')				
+def	mysql	index_stat	avg_frequency	5	NULL	YES	decimal	NULL	NULL	12	4	NULL	NULL	NULL	decimal(12,4)				
+def	mysql	index_stat	db_name	1	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
+def	mysql	index_stat	index_name	3	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
+def	mysql	index_stat	prefix_arity	4	NULL	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(11) unsigned	PRI			
+def	mysql	index_stat	table_name	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
 def	mysql	ndb_binlog_index	deletes	6	NULL	NO	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(20) unsigned				
 def	mysql	ndb_binlog_index	epoch	3	NULL	NO	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(20) unsigned	PRI			
 def	mysql	ndb_binlog_index	File	2	NULL	NO	varchar	255	255	NULL	NULL	NULL	latin1	latin1_swedish_ci	varchar(255)				
@@ -169,6 +182,9 @@
 def	mysql	tables_priv	Table_priv	7		NO	set	98	294	NULL	NULL	NULL	utf8	utf8_general_ci	set('Select','Insert','Update','Delete','Create','Drop','Grant','References','Index','Alter','Create View','Show view','Trigger')				
 def	mysql	tables_priv	Timestamp	6	CURRENT_TIMESTAMP	NO	timestamp	NULL	NULL	NULL	NULL	0	NULL	NULL	timestamp		on update CURRENT_TIMESTAMP		
 def	mysql	tables_priv	User	3		NO	char	16	48	NULL	NULL	NULL	utf8	utf8_bin	char(16)	PRI			
+def	mysql	table_stat	cardinality	3	NULL	YES	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(21) unsigned				
+def	mysql	table_stat	db_name	1	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
+def	mysql	table_stat	table_name	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_bin	varchar(64)	PRI			
 def	mysql	time_zone	Time_zone_id	1	NULL	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(10) unsigned	PRI	auto_increment		
 def	mysql	time_zone	Use_leap_seconds	2	N	NO	enum	1	3	NULL	NULL	NULL	utf8	utf8_general_ci	enum('Y','N')				
 def	mysql	time_zone_leap_second	Correction	2	NULL	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(11)				
@@ -258,6 +274,7 @@
 COL_CML	DATA_TYPE	CHARACTER_SET_NAME	COLLATION_NAME
 3.0000	char	utf8	utf8_bin
 3.0000	enum	utf8	utf8_bin
+3.0000	varchar	utf8	utf8_bin
 3.0000	char	utf8	utf8_general_ci
 3.0000	enum	utf8	utf8_general_ci
 3.0000	set	utf8	utf8_general_ci
@@ -274,6 +291,7 @@
 COL_CML	DATA_TYPE	CHARACTER_SET_NAME	COLLATION_NAME
 NULL	bigint	NULL	NULL
 NULL	datetime	NULL	NULL
+NULL	decimal	NULL	NULL
 NULL	int	NULL	NULL
 NULL	smallint	NULL	NULL
 NULL	time	NULL	NULL
@@ -302,6 +320,14 @@
 3.0000	mysql	columns_priv	Column_name	char	64	192	utf8	utf8_bin	char(64)
 NULL	mysql	columns_priv	Timestamp	timestamp	NULL	NULL	NULL	NULL	timestamp
 3.0000	mysql	columns_priv	Column_priv	set	31	93	utf8	utf8_general_ci	set('Select','Insert','Update','References')
+3.0000	mysql	column_stat	db_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	column_stat	table_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	column_stat	column_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	column_stat	min_value	varchar	255	765	utf8	utf8_bin	varchar(255)
+3.0000	mysql	column_stat	max_value	varchar	255	765	utf8	utf8_bin	varchar(255)
+NULL	mysql	column_stat	nulls_ratio	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
+NULL	mysql	column_stat	avg_length	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
+NULL	mysql	column_stat	avg_frequency	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
 3.0000	mysql	db	Host	char	60	180	utf8	utf8_bin	char(60)
 3.0000	mysql	db	Db	char	64	192	utf8	utf8_bin	char(64)
 3.0000	mysql	db	User	char	16	48	utf8	utf8_bin	char(16)
@@ -390,6 +416,11 @@
 3.0000	mysql	host	Alter_routine_priv	enum	1	3	utf8	utf8_general_ci	enum('N','Y')
 3.0000	mysql	host	Execute_priv	enum	1	3	utf8	utf8_general_ci	enum('N','Y')
 3.0000	mysql	host	Trigger_priv	enum	1	3	utf8	utf8_general_ci	enum('N','Y')
+3.0000	mysql	index_stat	db_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	index_stat	table_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	index_stat	index_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+NULL	mysql	index_stat	prefix_arity	int	NULL	NULL	NULL	NULL	int(11) unsigned
+NULL	mysql	index_stat	avg_frequency	decimal	NULL	NULL	NULL	NULL	decimal(12,4)
 NULL	mysql	ndb_binlog_index	Position	bigint	NULL	NULL	NULL	NULL	bigint(20) unsigned
 1.0000	mysql	ndb_binlog_index	File	varchar	255	255	latin1	latin1_swedish_ci	varchar(255)
 NULL	mysql	ndb_binlog_index	epoch	bigint	NULL	NULL	NULL	NULL	bigint(20) unsigned
@@ -462,6 +493,9 @@
 NULL	mysql	tables_priv	Timestamp	timestamp	NULL	NULL	NULL	NULL	timestamp
 3.0000	mysql	tables_priv	Table_priv	set	98	294	utf8	utf8_general_ci	set('Select','Insert','Update','Delete','Create','Drop','Grant','References','Index','Alter','Create View','Show view','Trigger')
 3.0000	mysql	tables_priv	Column_priv	set	31	93	utf8	utf8_general_ci	set('Select','Insert','Update','References')
+3.0000	mysql	table_stat	db_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+3.0000	mysql	table_stat	table_name	varchar	64	192	utf8	utf8_bin	varchar(64)
+NULL	mysql	table_stat	cardinality	bigint	NULL	NULL	NULL	NULL	bigint(21) unsigned
 NULL	mysql	time_zone	Time_zone_id	int	NULL	NULL	NULL	NULL	int(10) unsigned
 3.0000	mysql	time_zone	Use_leap_seconds	enum	1	3	utf8	utf8_general_ci	enum('Y','N')
 NULL	mysql	time_zone_leap_second	Transition_time	bigint	NULL	NULL	NULL	NULL	bigint(20)

=== modified file 'mysql-test/suite/funcs_1/r/is_key_column_usage.result'
--- a/mysql-test/suite/funcs_1/r/is_key_column_usage.result	2010-12-17 11:11:34 +0000
+++ b/mysql-test/suite/funcs_1/r/is_key_column_usage.result	2012-03-19 08:35:32 +0000
@@ -75,6 +75,9 @@
 FROM information_schema.key_column_usage
 WHERE constraint_catalog IS NOT NULL OR table_catalog IS NOT NULL;
 constraint_catalog	constraint_schema	constraint_name	table_catalog	table_schema	table_name	column_name
+def	mysql	PRIMARY	def	mysql	column_stat	db_name
+def	mysql	PRIMARY	def	mysql	column_stat	table_name
+def	mysql	PRIMARY	def	mysql	column_stat	column_name
 def	mysql	PRIMARY	def	mysql	columns_priv	Host
 def	mysql	PRIMARY	def	mysql	columns_priv	Db
 def	mysql	PRIMARY	def	mysql	columns_priv	User
@@ -96,6 +99,10 @@
 def	mysql	name	def	mysql	help_topic	name
 def	mysql	PRIMARY	def	mysql	host	Host
 def	mysql	PRIMARY	def	mysql	host	Db
+def	mysql	PRIMARY	def	mysql	index_stat	db_name
+def	mysql	PRIMARY	def	mysql	index_stat	table_name
+def	mysql	PRIMARY	def	mysql	index_stat	index_name
+def	mysql	PRIMARY	def	mysql	index_stat	prefix_arity
 def	mysql	PRIMARY	def	mysql	ndb_binlog_index	epoch
 def	mysql	PRIMARY	def	mysql	plugin	name
 def	mysql	PRIMARY	def	mysql	proc	db
@@ -111,6 +118,8 @@
 def	mysql	PRIMARY	def	mysql	proxies_priv	Proxied_host
 def	mysql	PRIMARY	def	mysql	proxies_priv	Proxied_user
 def	mysql	PRIMARY	def	mysql	servers	Server_name
+def	mysql	PRIMARY	def	mysql	table_stat	db_name
+def	mysql	PRIMARY	def	mysql	table_stat	table_name
 def	mysql	PRIMARY	def	mysql	tables_priv	Host
 def	mysql	PRIMARY	def	mysql	tables_priv	Db
 def	mysql	PRIMARY	def	mysql	tables_priv	User

=== modified file 'mysql-test/suite/funcs_1/r/is_statistics.result'
--- a/mysql-test/suite/funcs_1/r/is_statistics.result	2011-12-12 22:58:40 +0000
+++ b/mysql-test/suite/funcs_1/r/is_statistics.result	2012-03-19 08:35:32 +0000
@@ -85,6 +85,9 @@
 SELECT table_catalog, table_schema, table_name, index_schema, index_name
 FROM information_schema.statistics WHERE table_catalog IS NOT NULL;
 table_catalog	table_schema	table_name	index_schema	index_name
+def	mysql	column_stat	mysql	PRIMARY
+def	mysql	column_stat	mysql	PRIMARY
+def	mysql	column_stat	mysql	PRIMARY
 def	mysql	columns_priv	mysql	PRIMARY
 def	mysql	columns_priv	mysql	PRIMARY
 def	mysql	columns_priv	mysql	PRIMARY
@@ -107,6 +110,10 @@
 def	mysql	help_topic	mysql	name
 def	mysql	host	mysql	PRIMARY
 def	mysql	host	mysql	PRIMARY
+def	mysql	index_stat	mysql	PRIMARY
+def	mysql	index_stat	mysql	PRIMARY
+def	mysql	index_stat	mysql	PRIMARY
+def	mysql	index_stat	mysql	PRIMARY
 def	mysql	ndb_binlog_index	mysql	PRIMARY
 def	mysql	plugin	mysql	PRIMARY
 def	mysql	proc	mysql	PRIMARY
@@ -124,6 +131,8 @@
 def	mysql	proxies_priv	mysql	PRIMARY
 def	mysql	proxies_priv	mysql	Grantor
 def	mysql	servers	mysql	PRIMARY
+def	mysql	table_stat	mysql	PRIMARY
+def	mysql	table_stat	mysql	PRIMARY
 def	mysql	tables_priv	mysql	PRIMARY
 def	mysql	tables_priv	mysql	PRIMARY
 def	mysql	tables_priv	mysql	PRIMARY

=== modified file 'mysql-test/suite/funcs_1/r/is_statistics_mysql.result'
--- a/mysql-test/suite/funcs_1/r/is_statistics_mysql.result	2010-12-17 11:11:34 +0000
+++ b/mysql-test/suite/funcs_1/r/is_statistics_mysql.result	2012-03-19 08:35:32 +0000
@@ -12,6 +12,9 @@
 def	mysql	columns_priv	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	4	Table_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	5	Column_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	3	column_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	1	Host	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
@@ -29,6 +32,10 @@
 def	mysql	help_topic	0	mysql	PRIMARY	1	help_topic_id	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	host	0	mysql	PRIMARY	1	Host	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	host	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	3	index_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	4	prefix_arity	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	ndb_binlog_index	0	mysql	PRIMARY	1	epoch	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	plugin	0	mysql	PRIMARY	1	name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	proc	0	mysql	PRIMARY	1	db	A	#CARD#	NULL	NULL		BTREE		
@@ -51,6 +58,8 @@
 def	mysql	tables_priv	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	tables_priv	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	tables_priv	0	mysql	PRIMARY	4	Table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	table_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	table_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone	0	mysql	PRIMARY	1	Time_zone_id	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone_leap_second	0	mysql	PRIMARY	1	Transition_time	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone_name	0	mysql	PRIMARY	1	Name	A	#CARD#	NULL	NULL		BTREE		

=== modified file 'mysql-test/suite/funcs_1/r/is_statistics_mysql_embedded.result'
--- a/mysql-test/suite/funcs_1/r/is_statistics_mysql_embedded.result	2011-03-18 11:14:42 +0000
+++ b/mysql-test/suite/funcs_1/r/is_statistics_mysql_embedded.result	2012-03-19 08:35:32 +0000
@@ -12,6 +12,9 @@
 def	mysql	columns_priv	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	4	Table_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	5	Column_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	3	column_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	1	Host	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
@@ -29,6 +32,10 @@
 def	mysql	help_topic	0	mysql	PRIMARY	1	help_topic_id	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	host	0	mysql	PRIMARY	1	Host	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	host	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	3	index_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	4	prefix_arity	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	ndb_binlog_index	0	mysql	PRIMARY	1	epoch	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	plugin	0	mysql	PRIMARY	1	name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	proc	0	mysql	PRIMARY	1	db	A	#CARD#	NULL	NULL		BTREE		
@@ -51,6 +58,8 @@
 def	mysql	tables_priv	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	tables_priv	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	tables_priv	0	mysql	PRIMARY	4	Table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	table_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	table_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone	0	mysql	PRIMARY	1	Time_zone_id	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone_leap_second	0	mysql	PRIMARY	1	Transition_time	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone_name	0	mysql	PRIMARY	1	Name	A	#CARD#	NULL	NULL		BTREE		
@@ -70,6 +79,9 @@
 def	mysql	columns_priv	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	4	Table_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	columns_priv	0	mysql	PRIMARY	5	Column_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	column_stat	0	mysql	PRIMARY	3	column_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	1	Host	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	db	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
@@ -87,6 +99,10 @@
 def	mysql	help_topic	0	mysql	PRIMARY	1	help_topic_id	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	host	0	mysql	PRIMARY	1	Host	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	host	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	3	index_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	index_stat	0	mysql	PRIMARY	4	prefix_arity	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	ndb_binlog_index	0	mysql	PRIMARY	1	epoch	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	plugin	0	mysql	PRIMARY	1	name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	proc	0	mysql	PRIMARY	1	db	A	#CARD#	NULL	NULL		BTREE		
@@ -109,6 +125,8 @@
 def	mysql	tables_priv	0	mysql	PRIMARY	2	Db	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	tables_priv	0	mysql	PRIMARY	3	User	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	tables_priv	0	mysql	PRIMARY	4	Table_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	table_stat	0	mysql	PRIMARY	1	db_name	A	#CARD#	NULL	NULL		BTREE		
+def	mysql	table_stat	0	mysql	PRIMARY	2	table_name	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone	0	mysql	PRIMARY	1	Time_zone_id	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone_leap_second	0	mysql	PRIMARY	1	Transition_time	A	#CARD#	NULL	NULL		BTREE		
 def	mysql	time_zone_name	0	mysql	PRIMARY	1	Name	A	#CARD#	NULL	NULL		BTREE		

=== modified file 'mysql-test/suite/funcs_1/r/is_table_constraints.result'
--- a/mysql-test/suite/funcs_1/r/is_table_constraints.result	2010-12-17 11:11:34 +0000
+++ b/mysql-test/suite/funcs_1/r/is_table_constraints.result	2012-03-19 08:35:32 +0000
@@ -57,6 +57,7 @@
 FROM information_schema.table_constraints
 WHERE constraint_catalog IS NOT NULL;
 constraint_catalog	constraint_schema	constraint_name	table_schema	table_name
+def	mysql	PRIMARY	mysql	column_stat
 def	mysql	PRIMARY	mysql	columns_priv
 def	mysql	PRIMARY	mysql	db
 def	mysql	PRIMARY	mysql	event
@@ -69,12 +70,14 @@
 def	mysql	PRIMARY	mysql	help_topic
 def	mysql	name	mysql	help_topic
 def	mysql	PRIMARY	mysql	host
+def	mysql	PRIMARY	mysql	index_stat
 def	mysql	PRIMARY	mysql	ndb_binlog_index
 def	mysql	PRIMARY	mysql	plugin
 def	mysql	PRIMARY	mysql	proc
 def	mysql	PRIMARY	mysql	procs_priv
 def	mysql	PRIMARY	mysql	proxies_priv
 def	mysql	PRIMARY	mysql	servers
+def	mysql	PRIMARY	mysql	table_stat
 def	mysql	PRIMARY	mysql	tables_priv
 def	mysql	PRIMARY	mysql	time_zone
 def	mysql	PRIMARY	mysql	time_zone_leap_second

=== modified file 'mysql-test/suite/funcs_1/r/is_table_constraints_mysql.result'
--- a/mysql-test/suite/funcs_1/r/is_table_constraints_mysql.result	2010-12-17 11:11:34 +0000
+++ b/mysql-test/suite/funcs_1/r/is_table_constraints_mysql.result	2012-03-19 08:35:32 +0000
@@ -8,6 +8,7 @@
 ORDER BY table_schema,table_name,constraint_name;
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_SCHEMA	TABLE_NAME	CONSTRAINT_TYPE
 def	mysql	PRIMARY	mysql	columns_priv	PRIMARY KEY
+def	mysql	PRIMARY	mysql	column_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	db	PRIMARY KEY
 def	mysql	PRIMARY	mysql	event	PRIMARY KEY
 def	mysql	PRIMARY	mysql	func	PRIMARY KEY
@@ -19,6 +20,7 @@
 def	mysql	name	mysql	help_topic	UNIQUE
 def	mysql	PRIMARY	mysql	help_topic	PRIMARY KEY
 def	mysql	PRIMARY	mysql	host	PRIMARY KEY
+def	mysql	PRIMARY	mysql	index_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	ndb_binlog_index	PRIMARY KEY
 def	mysql	PRIMARY	mysql	plugin	PRIMARY KEY
 def	mysql	PRIMARY	mysql	proc	PRIMARY KEY
@@ -26,6 +28,7 @@
 def	mysql	PRIMARY	mysql	proxies_priv	PRIMARY KEY
 def	mysql	PRIMARY	mysql	servers	PRIMARY KEY
 def	mysql	PRIMARY	mysql	tables_priv	PRIMARY KEY
+def	mysql	PRIMARY	mysql	table_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone_leap_second	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone_name	PRIMARY KEY

=== modified file 'mysql-test/suite/funcs_1/r/is_table_constraints_mysql_embedded.result'
--- a/mysql-test/suite/funcs_1/r/is_table_constraints_mysql_embedded.result	2011-03-18 11:14:42 +0000
+++ b/mysql-test/suite/funcs_1/r/is_table_constraints_mysql_embedded.result	2012-03-19 08:35:32 +0000
@@ -8,6 +8,7 @@
 ORDER BY table_schema,table_name,constraint_name;
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_SCHEMA	TABLE_NAME	CONSTRAINT_TYPE
 def	mysql	PRIMARY	mysql	columns_priv	PRIMARY KEY
+def	mysql	PRIMARY	mysql	column_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	db	PRIMARY KEY
 def	mysql	PRIMARY	mysql	event	PRIMARY KEY
 def	mysql	PRIMARY	mysql	func	PRIMARY KEY
@@ -19,6 +20,7 @@
 def	mysql	name	mysql	help_topic	UNIQUE
 def	mysql	PRIMARY	mysql	help_topic	PRIMARY KEY
 def	mysql	PRIMARY	mysql	host	PRIMARY KEY
+def	mysql	PRIMARY	mysql	index_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	ndb_binlog_index	PRIMARY KEY
 def	mysql	PRIMARY	mysql	plugin	PRIMARY KEY
 def	mysql	PRIMARY	mysql	proc	PRIMARY KEY
@@ -26,6 +28,7 @@
 def	mysql	PRIMARY	mysql	proxies_priv	PRIMARY KEY
 def	mysql	PRIMARY	mysql	servers	PRIMARY KEY
 def	mysql	PRIMARY	mysql	tables_priv	PRIMARY KEY
+def	mysql	PRIMARY	mysql	table_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone_leap_second	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone_name	PRIMARY KEY
@@ -38,6 +41,7 @@
 ORDER BY table_schema,table_name,constraint_name;
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_SCHEMA	TABLE_NAME	CONSTRAINT_TYPE
 def	mysql	PRIMARY	mysql	columns_priv	PRIMARY KEY
+def	mysql	PRIMARY	mysql	column_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	db	PRIMARY KEY
 def	mysql	PRIMARY	mysql	event	PRIMARY KEY
 def	mysql	PRIMARY	mysql	func	PRIMARY KEY
@@ -49,6 +53,7 @@
 def	mysql	name	mysql	help_topic	UNIQUE
 def	mysql	PRIMARY	mysql	help_topic	PRIMARY KEY
 def	mysql	PRIMARY	mysql	host	PRIMARY KEY
+def	mysql	PRIMARY	mysql	index_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	ndb_binlog_index	PRIMARY KEY
 def	mysql	PRIMARY	mysql	plugin	PRIMARY KEY
 def	mysql	PRIMARY	mysql	proc	PRIMARY KEY
@@ -56,6 +61,7 @@
 def	mysql	PRIMARY	mysql	proxies_priv	PRIMARY KEY
 def	mysql	PRIMARY	mysql	servers	PRIMARY KEY
 def	mysql	PRIMARY	mysql	tables_priv	PRIMARY KEY
+def	mysql	PRIMARY	mysql	table_stat	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone_leap_second	PRIMARY KEY
 def	mysql	PRIMARY	mysql	time_zone_name	PRIMARY KEY

=== modified file 'mysql-test/suite/funcs_1/r/is_tables_mysql.result'
--- a/mysql-test/suite/funcs_1/r/is_tables_mysql.result	2011-10-19 19:45:18 +0000
+++ b/mysql-test/suite/funcs_1/r/is_tables_mysql.result	2012-03-19 08:35:32 +0000
@@ -37,6 +37,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	column_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Columns
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	db
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA
@@ -244,6 +267,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	index_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Indexes
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	ndb_binlog_index
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA
@@ -428,6 +474,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	table_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Tables
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	time_zone
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA

=== modified file 'mysql-test/suite/funcs_1/r/is_tables_mysql_embedded.result'
--- a/mysql-test/suite/funcs_1/r/is_tables_mysql_embedded.result	2011-10-19 19:45:18 +0000
+++ b/mysql-test/suite/funcs_1/r/is_tables_mysql_embedded.result	2012-03-19 08:35:32 +0000
@@ -37,6 +37,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	column_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Columns
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	db
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA
@@ -244,6 +267,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	index_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Indexes
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	ndb_binlog_index
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA
@@ -428,6 +474,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	table_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Tables
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	time_zone
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA
@@ -605,6 +674,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	column_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Columns
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	db
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA
@@ -812,6 +904,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	index_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Indexes
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	ndb_binlog_index
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA
@@ -996,6 +1111,29 @@
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	mysql
+TABLE_NAME	table_stat
+TABLE_TYPE	BASE TABLE
+ENGINE	MYISAM_OR_MARIA
+VERSION	10
+ROW_FORMAT	DYNAMIC_OR_PAGE
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	NULL
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	utf8_bin
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	Statistics on Tables
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	mysql
 TABLE_NAME	time_zone
 TABLE_TYPE	BASE TABLE
 ENGINE	MYISAM_OR_MARIA

=== added directory 'mysql-test/suite/pbxt'
=== added directory 'mysql-test/suite/pbxt/r'
=== modified file 'mysql-test/suite/perfschema/r/myisam_file_io.result'
--- a/mysql-test/suite/perfschema/r/myisam_file_io.result	2010-12-01 09:24:16 +0000
+++ b/mysql-test/suite/perfschema/r/myisam_file_io.result	2012-07-10 23:34:39 +0000
@@ -17,6 +17,7 @@
 from performance_schema.events_waits_history_long
 where operation not like "tell"
   and event_name like "wait/io/file/myisam/%"
+  having short_name <> ""
   order by thread_id, event_id;
 event_name	short_source	operation	number_of_bytes	short_name
 wait/io/file/myisam/kfile	mi_create.c:	create	NULL	no_index_tab.MYI

=== modified file 'mysql-test/suite/perfschema/r/pfs_upgrade.result'
--- a/mysql-test/suite/perfschema/r/pfs_upgrade.result	2012-01-13 14:50:02 +0000
+++ b/mysql-test/suite/perfschema/r/pfs_upgrade.result	2012-03-19 08:35:32 +0000
@@ -25,7 +25,7 @@
 ERROR 1050 (42S01) at line 445: Table 'setup_instruments' already exists
 ERROR 1050 (42S01) at line 461: Table 'setup_timers' already exists
 ERROR 1050 (42S01) at line 478: Table 'threads' already exists
-ERROR 1644 (HY000) at line 1126: Unexpected content found in the performance_schema database.
+ERROR 1644 (HY000) at line 1132: Unexpected content found in the performance_schema database.
 FATAL ERROR: Upgrade failed
 show tables like "user_table";
 Tables_in_performance_schema (user_table)
@@ -55,7 +55,7 @@
 ERROR 1050 (42S01) at line 445: Table 'setup_instruments' already exists
 ERROR 1050 (42S01) at line 461: Table 'setup_timers' already exists
 ERROR 1050 (42S01) at line 478: Table 'threads' already exists
-ERROR 1644 (HY000) at line 1126: Unexpected content found in the performance_schema database.
+ERROR 1644 (HY000) at line 1132: Unexpected content found in the performance_schema database.
 FATAL ERROR: Upgrade failed
 show tables like "user_view";
 Tables_in_performance_schema (user_view)
@@ -83,7 +83,7 @@
 ERROR 1050 (42S01) at line 445: Table 'setup_instruments' already exists
 ERROR 1050 (42S01) at line 461: Table 'setup_timers' already exists
 ERROR 1050 (42S01) at line 478: Table 'threads' already exists
-ERROR 1644 (HY000) at line 1126: Unexpected content found in the performance_schema database.
+ERROR 1644 (HY000) at line 1132: Unexpected content found in the performance_schema database.
 FATAL ERROR: Upgrade failed
 select name from mysql.proc where db='performance_schema';
 name
@@ -111,7 +111,7 @@
 ERROR 1050 (42S01) at line 445: Table 'setup_instruments' already exists
 ERROR 1050 (42S01) at line 461: Table 'setup_timers' already exists
 ERROR 1050 (42S01) at line 478: Table 'threads' already exists
-ERROR 1644 (HY000) at line 1126: Unexpected content found in the performance_schema database.
+ERROR 1644 (HY000) at line 1132: Unexpected content found in the performance_schema database.
 FATAL ERROR: Upgrade failed
 select name from mysql.proc where db='performance_schema';
 name
@@ -139,7 +139,7 @@
 ERROR 1050 (42S01) at line 445: Table 'setup_instruments' already exists
 ERROR 1050 (42S01) at line 461: Table 'setup_timers' already exists
 ERROR 1050 (42S01) at line 478: Table 'threads' already exists
-ERROR 1644 (HY000) at line 1126: Unexpected content found in the performance_schema database.
+ERROR 1644 (HY000) at line 1132: Unexpected content found in the performance_schema database.
 FATAL ERROR: Upgrade failed
 select name from mysql.event where db='performance_schema';
 name

=== modified file 'mysql-test/suite/perfschema/t/myisam_file_io.test'
--- a/mysql-test/suite/perfschema/t/myisam_file_io.test	2011-10-19 21:44:17 +0000
+++ b/mysql-test/suite/perfschema/t/myisam_file_io.test	2012-07-10 23:34:39 +0000
@@ -46,6 +46,7 @@
   from performance_schema.events_waits_history_long
   where operation not like "tell"
   and event_name like "wait/io/file/myisam/%"
+  having short_name <> ""
   order by thread_id, event_id;
 
 # In case of failures, this will tell if file io are lost.

=== added file 'mysql-test/suite/sys_vars/r/use_stat_tables_basic.result'
--- a/mysql-test/suite/sys_vars/r/use_stat_tables_basic.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/suite/sys_vars/r/use_stat_tables_basic.result	2012-06-03 00:19:01 +0000
@@ -0,0 +1,95 @@
+SET @start_global_value = @@global.use_stat_tables;
+SELECT @start_global_value;
+ at start_global_value
+NEVER
+SET @start_session_value = @@session.use_stat_tables;
+SELECT @start_session_value;
+ at start_session_value
+NEVER
+SET @@global.use_stat_tables = 2;
+SET @@global.use_stat_tables = DEFAULT;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+NEVER
+SET @@global.use_stat_tables = 0;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+NEVER
+SET @@global.use_stat_tables = 1;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+COMPLEMENTARY
+SET @@global.use_stat_tables = 2;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+PREFERABLY
+SET @@global.use_stat_tables = NEVER;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+NEVER
+SET @@global.use_stat_tables = COMPLEMENTARY;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+COMPLEMENTARY
+SET @@global.use_stat_tables = PREFERABLY;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+PREFERABLY
+SET @@session.use_stat_tables = 0;
+SELECT @@session.use_stat_tables;
+@@session.use_stat_tables
+NEVER
+SET @@session.use_stat_tables = 1;
+SELECT @@session.use_stat_tables;
+@@session.use_stat_tables
+COMPLEMENTARY
+SET @@session.use_stat_tables = 2;
+SELECT @@session.use_stat_tables;
+@@session.use_stat_tables
+PREFERABLY
+SET @@session.use_stat_tables = NEVER;
+SELECT @@session.use_stat_tables;
+@@session.use_stat_tables
+NEVER
+SET @@session.use_stat_tables = PREFERABLY;
+SELECT @@session.use_stat_tables;
+@@session.use_stat_tables
+PREFERABLY
+SET @@session.use_stat_tables = COMPLEMENTARY;
+SELECT @@session.use_stat_tables;
+@@session.use_stat_tables
+COMPLEMENTARY
+set sql_mode=TRADITIONAL;
+SET @@global.use_stat_tables = 10;
+ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '10'
+SET @@global.use_stat_tables = -1024;
+ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '-1024'
+SET @@global.use_stat_tables = 2.4;
+ERROR 42000: Incorrect argument type to variable 'use_stat_tables'
+SET @@global.use_stat_tables = OFF;
+ERROR 42000: Variable 'use_stat_tables' can't be set to the value of 'OFF'
+SET @@session.use_stat_tables = 10;
+ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '10'
+SET @@session.use_stat_tables = -2;
+ERROR 42000: Variable 'use_stat_tables' can't be set to the value of '-2'
+SET @@session.use_stat_tables = 1.2;
+ERROR 42000: Incorrect argument type to variable 'use_stat_tables'
+SET @@session.use_stat_tables = ON;
+ERROR 42000: Variable 'use_stat_tables' can't be set to the value of 'ON'
+SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
+WHERE VARIABLE_NAME='use_stat_tables';
+VARIABLE_NAME	VARIABLE_VALUE
+USE_STAT_TABLES	PREFERABLY
+SELECT * FROM INFORMATION_SCHEMA.SESSION_VARIABLES 
+WHERE VARIABLE_NAME='use_stat_tables';
+VARIABLE_NAME	VARIABLE_VALUE
+USE_STAT_TABLES	COMPLEMENTARY
+SET @@global.use_stat_tables = @start_global_value;
+SELECT @@global.use_stat_tables;
+@@global.use_stat_tables
+NEVER
+SET @@session.use_stat_tables = @start_session_value;
+SELECT @@session.use_stat_tables;
+@@session.use_stat_tables
+NEVER
+set sql_mode='';

=== added file 'mysql-test/suite/sys_vars/t/use_stat_tables_basic.test'
--- a/mysql-test/suite/sys_vars/t/use_stat_tables_basic.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/suite/sys_vars/t/use_stat_tables_basic.test	2012-06-03 00:19:01 +0000
@@ -0,0 +1,100 @@
+--source include/load_sysvars.inc
+
+#############################################################
+#                 Save initial value                        #
+#############################################################
+
+SET @start_global_value = @@global.use_stat_tables;
+SELECT @start_global_value;
+SET @start_session_value = @@session.use_stat_tables;
+SELECT @start_session_value;
+
+###############################################################
+#     Display the DEFAULT value of use_stat_tables            #
+###############################################################
+
+SET @@global.use_stat_tables = 2;
+SET @@global.use_stat_tables = DEFAULT;
+SELECT @@global.use_stat_tables;
+
+
+##################################################################################
+# Change the value of use_stat_tables to a valid value for GLOBAL Scope          #
+##################################################################################
+
+SET @@global.use_stat_tables = 0;
+SELECT @@global.use_stat_tables;
+SET @@global.use_stat_tables = 1;
+SELECT @@global.use_stat_tables;
+SET @@global.use_stat_tables = 2;
+SELECT @@global.use_stat_tables;
+
+SET @@global.use_stat_tables = NEVER;
+SELECT @@global.use_stat_tables;
+SET @@global.use_stat_tables = COMPLEMENTARY;
+SELECT @@global.use_stat_tables;
+SET @@global.use_stat_tables = PREFERABLY;
+SELECT @@global.use_stat_tables;
+
+####################################################################################
+# Change the value of use_stat_tables to a valid value for SESSION Scope           #
+####################################################################################
+
+SET @@session.use_stat_tables = 0;
+SELECT @@session.use_stat_tables;
+SET @@session.use_stat_tables = 1;
+SELECT @@session.use_stat_tables;
+SET @@session.use_stat_tables = 2;
+SELECT @@session.use_stat_tables;
+
+SET @@session.use_stat_tables = NEVER;
+SELECT @@session.use_stat_tables;
+SET @@session.use_stat_tables = PREFERABLY;
+SELECT @@session.use_stat_tables;
+SET @@session.use_stat_tables = COMPLEMENTARY;
+SELECT @@session.use_stat_tables;
+
+#####################################################################
+# Change the value of use_stat_tables to an invalid value           #
+#####################################################################
+set sql_mode=TRADITIONAL;
+--Error ER_WRONG_VALUE_FOR_VAR
+SET @@global.use_stat_tables = 10;
+--Error ER_WRONG_VALUE_FOR_VAR
+SET @@global.use_stat_tables = -1024;
+--Error ER_WRONG_TYPE_FOR_VAR
+SET @@global.use_stat_tables = 2.4;
+--Error ER_WRONG_VALUE_FOR_VAR
+SET @@global.use_stat_tables = OFF;
+--Error ER_WRONG_VALUE_FOR_VAR
+SET @@session.use_stat_tables = 10;
+--Error ER_WRONG_VALUE_FOR_VAR
+SET @@session.use_stat_tables = -2;
+--Error ER_WRONG_TYPE_FOR_VAR
+SET @@session.use_stat_tables = 1.2;
+--Error ER_WRONG_VALUE_FOR_VAR
+SET @@session.use_stat_tables = ON;
+
+###############################################################################
+#   Check if the value in GLOBAL & SESSION Tables matches value in variable   #
+###############################################################################
+
+SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
+WHERE VARIABLE_NAME='use_stat_tables';
+
+SELECT * FROM INFORMATION_SCHEMA.SESSION_VARIABLES 
+WHERE VARIABLE_NAME='use_stat_tables';
+
+####################################
+#     Restore initial value        #
+####################################
+
+SET @@global.use_stat_tables = @start_global_value;
+SELECT @@global.use_stat_tables;
+SET @@session.use_stat_tables = @start_session_value;
+SELECT @@session.use_stat_tables;
+set sql_mode='';
+
+######################################################
+#         END OF use_stat_tables TESTS               #
+######################################################
\ No newline at end of file

=== added file 'mysql-test/t/mdev-504.test'
--- a/mysql-test/t/mdev-504.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/mdev-504.test	2012-09-03 18:01:52 +0000
@@ -0,0 +1,75 @@
+CREATE TABLE A (
+  pk INTEGER AUTO_INCREMENT PRIMARY KEY,
+  fdate DATE
+) ENGINE=MyISAM;
+
+--delimiter |
+
+CREATE PROCEDURE p_analyze()
+BEGIN
+  DECLARE attempts INTEGER DEFAULT 100;
+  wl_loop: WHILE attempts > 0 DO
+    ANALYZE TABLE A;
+    SET attempts = attempts - 1;
+  END WHILE wl_loop;
+END |
+
+CREATE FUNCTION rnd3() RETURNS INT
+BEGIN
+  RETURN ROUND(3 * RAND() + 0.5);
+END |
+
+--delimiter ;
+
+SET GLOBAL use_stat_tables = PREFERABLY;  
+
+--let $trial = 100
+
+--disable_query_log
+--disable_result_log
+--disable_warnings
+while ($trial)
+{
+
+  --connect (con1,localhost,root,,)
+  --send CALL p_analyze()
+
+  --connect (con2,localhost,root,,)
+  --send CALL p_analyze()
+
+  --let $run = 100
+
+  while ($run)
+  {
+    --connect (con3,localhost,root,,)
+  
+    let $query = `SELECT CASE rnd3() 
+      WHEN 1 THEN 'INSERT INTO A (pk) VALUES (NULL)'
+      WHEN 2 THEN 'DELETE FROM A LIMIT 1'
+      ELSE 'UPDATE A SET fdate = 2 LIMIT 1' END`;
+    --eval $query
+    --disconnect con3
+    --dec $run
+  }
+
+  --connection con2
+  --reap
+  --disconnect con2
+  --connection con1
+  --reap
+  --disconnect con1
+
+  --dec $trial
+}
+
+--enable_query_log
+--enable_result_log
+--enable_warnings
+
+# Cleanup
+--connection default
+DROP TABLE A;
+DROP PROCEDURE p_analyze;
+DROP FUNCTION rnd3;
+SET GLOBAL use_stat_tables = DEFAULT;
+

=== added file 'mysql-test/t/stat_tables.test'
--- a/mysql-test/t/stat_tables.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/stat_tables.test	2012-09-12 05:36:04 +0000
@@ -0,0 +1,207 @@
+--source include/have_stat_tables.inc
+
+select @@global.use_stat_tables;
+select @@session.use_stat_tables;
+
+set @save_use_stat_tables=@@use_stat_tables;
+
+set use_stat_tables='preferably';
+
+--disable_warnings
+DROP DATABASE IF EXISTS dbt3_s001;
+--enable_warnings
+
+CREATE DATABASE dbt3_s001;
+
+use dbt3_s001;
+
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+ 
+--disable_query_log
+--disable_result_log
+--disable_warnings
+--source include/dbt3_s001.inc
+create index i_p_retailprice on part(p_retailprice);
+delete from mysql.table_stat;
+delete from mysql.column_stat;
+delete from mysql.index_stat;
+ANALYZE TABLE
+customer, lineitem, nation, orders, part, partsupp, region, supplier;
+FLUSH TABLE mysql.table_stat, mysql.index_stat;
+--enable_warnings
+--enable_result_log
+--enable_query_log
+
+select * from mysql.table_stat;
+select * from mysql.index_stat;
+
+set optimizer_switch=@save_optimizer_switch; 
+
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='index_condition_pushdown=off';
+
+let $Q5=
+select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
+from customer, orders, lineitem, supplier, nation, region
+where c_custkey = o_custkey and l_orderkey = o_orderkey
+      and l_suppkey = s_suppkey and c_nationkey = s_nationkey
+      and s_nationkey = n_nationkey and n_regionkey = r_regionkey
+      and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
+      and o_orderdate < date '1995-01-01' + interval '1' year
+group by n_name
+order by revenue desc;
+
+eval EXPLAIN $Q5;
+eval $Q5;
+
+set optimizer_switch=@save_optimizer_switch;
+
+delete from mysql.index_stat;
+
+--disable_query_log
+--disable_result_log
+--disable_warnings
+ANALYZE TABLE
+customer, lineitem, nation, orders, part, partsupp, region, supplier;
+FLUSH TABLE mysql.table_stat, mysql.index_stat;
+--enable_warnings
+--enable_result_log
+--enable_query_log
+
+select * from mysql.table_stat;
+select * from mysql.index_stat;
+
+select * from mysql.table_stat where table_name='orders';
+select * from mysql.index_stat where table_name='orders';
+select (select cardinality from mysql.table_stat where table_name='orders') /
+       (select avg_frequency from mysql.index_stat 
+          where index_name='i_o_orderdate' and prefix_arity=1) as n_distinct; 
+select count(distinct o_orderdate) from orders;
+select (select cardinality from mysql.table_stat where table_name='orders') /
+       (select avg_frequency from mysql.index_stat 
+          where index_name='i_o_custkey' and prefix_arity=1) as n_distinct;
+select count(distinct o_custkey) from orders; 
+show index from orders;
+select index_name, column_name, cardinality from information_schema.statistics
+  where table_name='orders';
+
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='index_condition_pushdown=off';
+
+eval EXPLAIN $Q5;
+eval $Q5;
+
+set optimizer_switch=@save_optimizer_switch;
+
+let $Q8=
+select o_year,
+       sum(case when nation = 'UNITED STATES' then volume else 0 end) /
+       sum(volume) as mkt_share
+from (select extract(year from o_orderdate) as o_year,
+             l_extendedprice * (1-l_discount) as volume, 
+             n2.n_name as nation
+      from part, supplier, lineitem, orders, customer, 
+           nation n1, nation n2, region
+      where p_partkey = l_partkey and s_suppkey = l_suppkey
+            and l_orderkey = o_orderkey and o_custkey = c_custkey
+            and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey
+            and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey
+            and o_orderdate between date '1995-01-01' and date '1996-12-31'
+            and p_type = 'STANDARD BRUSHED STEEL' ) as all_nations
+group by o_year
+order by o_year;
+
+eval EXPLAIN $Q8;
+eval $Q8;
+
+
+let $Q9=
+select nation, o_year, sum(amount) as sum_profit
+from (select n_name as nation, 
+      extract(year from o_orderdate) as o_year,
+      l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount
+      from part, supplier, lineitem, partsupp, orders, nation
+      where s_suppkey = l_suppkey and ps_suppkey = l_suppkey
+            and ps_partkey = l_partkey and p_partkey = l_partkey
+            and o_orderkey = l_orderkey and s_nationkey = n_nationkey
+            and p_name like '%green%') as profit
+group by nation, o_year
+order by nation, o_year desc;
+
+eval EXPLAIN $Q9;
+eval $Q9;
+
+
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=on';
+
+let $QQ1=
+select o_orderkey, p_partkey
+  from part, lineitem, orders
+  where p_retailprice > 1100 and o_orderdate='1997-01-01' 
+        and o_orderkey=l_orderkey and p_partkey=l_partkey;
+
+eval EXPLAIN $QQ1;
+eval $QQ1;
+
+set optimizer_switch=@save_optimizer_switch;
+
+
+DROP DATABASE dbt3_s001;
+
+use test;
+
+--echo #
+--echo # Bug mdev-473: ANALYZE table locked for write
+--echo # 
+
+set use_stat_tables='complementary';
+
+create table t1 (i int);
+
+lock table t1 write;
+analyze table t1;
+alter table t1 add column a varchar(8);
+
+drop table t1;
+
+--echo #
+--echo # Bug mdev-487: memory leak in ANALYZE with stat tables
+--echo # 
+
+SET  use_stat_tables = 'preferably';
+
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+DELETE FROM t1 WHERE a=1;
+
+ANALYZE TABLE t1;
+
+DROP TABLE t1;
+
+--echo #
+--echo # Bug mdev-518: corrupted/missing statistical tables
+--echo # 
+
+CREATE TABLE t1 (i int) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1),(2);
+
+FLUSH TABLE t1;
+SET use_stat_tables='never';
+EXPLAIN SELECT * FROM t1;
+
+--move_file $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stat.MYD $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stat.MYD.save
+
+FLUSH TABLES;
+SET use_stat_tables='preferably';
+--disable_warnings
+EXPLAIN SELECT * FROM t1;
+--enable_warnings
+
+# Cleanup
+--move_file $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stat.MYD.save $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stat.MYD
+DROP TABLE t1;
+
+set use_stat_tables=@save_use_stat_tables;
+

=== added file 'mysql-test/t/stat_tables_disabled.test'
--- a/mysql-test/t/stat_tables_disabled.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/stat_tables_disabled.test	2012-09-02 06:51:47 +0000
@@ -0,0 +1,78 @@
+--source include/have_innodb.inc
+
+SET SESSION STORAGE_ENGINE='InnoDB';
+
+select @@global.use_stat_tables;
+select @@session.use_stat_tables;
+
+set @save_use_stat_tables=@@use_stat_tables;
+
+set use_stat_tables='preferably';
+
+--disable_warnings
+DROP DATABASE IF EXISTS dbt3_s001;
+--enable_warnings
+
+CREATE DATABASE dbt3_s001;
+
+use dbt3_s001;
+
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+ 
+--disable_query_log
+--disable_result_log
+--disable_warnings
+--source include/dbt3_s001.inc
+delete from mysql.table_stat;
+delete from mysql.column_stat;
+delete from mysql.index_stat;
+ANALYZE TABLE
+customer, lineitem, nation, orders, part, partsupp, region, supplier;
+--enable_warnings
+--enable_result_log
+--enable_query_log
+
+--echo #
+--echo # Bug mdev-503: optimizer ignores setting use_stat_tables='preferably'
+--echo # 
+
+flush tables 
+customer, lineitem, nation, orders, part, partsupp, region, supplier;
+
+let $Q3S=
+select sql_calc_found_rows straight_join
+       l_orderkey, sum(l_extendedprice*(1-l_discount)) as revenue,
+       o_orderdate, o_shippriority
+from orders, customer, lineitem
+where c_mktsegment = 'BUILDING' and c_custkey = o_custkey
+      and l_orderkey = o_orderkey and o_orderdate < date '1995-03-15'
+      and l_shipdate > date '1995-03-15'
+group by l_orderkey, o_orderdate, o_shippriority
+order by revenue desc, o_orderdate
+limit 10;
+
+set use_stat_tables='never';
+--replace_column 9 #
+eval EXPLAIN $Q3S;
+
+set use_stat_tables='preferably';
+--replace_result 2 1
+eval EXPLAIN $Q3S;
+
+flush tables customer, orders, lineitem;
+eval EXPLAIN $Q3S;
+
+--echo # End of the test case for mdev-503
+
+set optimizer_switch=@save_optimizer_switch;
+
+
+DROP DATABASE dbt3_s001;
+
+use test;
+
+set use_stat_tables=@save_use_stat_tables;
+
+
+SET SESSION STORAGE_ENGINE=DEFAULT;

=== added file 'mysql-test/t/stat_tables_innodb.test'
--- a/mysql-test/t/stat_tables_innodb.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/stat_tables_innodb.test	2012-05-07 05:42:14 +0000
@@ -0,0 +1,12 @@
+--source include/have_innodb.inc
+
+SET SESSION STORAGE_ENGINE='InnoDB';
+
+set @save_optimizer_switch_for_stat_tables_test=@@optimizer_switch;
+set optimizer_switch='extended_keys=on';
+
+--source stat_tables.test
+
+set optimizer_switch=@save_optimizer_switch_for_stat_tables_test;
+
+SET SESSION STORAGE_ENGINE=DEFAULT;

=== added file 'mysql-test/t/stat_tables_par.test'
--- a/mysql-test/t/stat_tables_par.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/stat_tables_par.test	2012-09-08 19:04:31 +0000
@@ -0,0 +1,153 @@
+--source include/have_stat_tables.inc
+--source include/have_debug_sync.inc
+--source include/not_embedded.inc
+
+set @save_use_stat_tables=@@use_stat_tables;
+
+set use_stat_tables='preferably';
+
+--disable_warnings
+DROP DATABASE IF EXISTS dbt3_s001;
+--enable_warnings
+
+CREATE DATABASE dbt3_s001;
+
+use dbt3_s001;
+
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='extended_keys=off';
+ 
+--disable_query_log
+--disable_result_log
+--disable_warnings
+--source include/dbt3_s001.inc
+delete from mysql.table_stat;
+delete from mysql.column_stat;
+delete from mysql.index_stat;
+ANALYZE TABLE
+customer, lineitem, nation, orders, part, partsupp, region, supplier;
+--enable_warnings
+--enable_result_log
+--enable_query_log
+
+select * from mysql.table_stat;
+select * from mysql.index_stat;
+
+
+#
+# Test for parallel memory allocation for statistical data
+# 
+#    assumes that start the code of memory allocation for stats data has this line:
+#
+#       DEBUG_SYNC(thd, "statistics_mem_alloc_start1");
+#       DEBUG_SYNC(thd, "statistics_mem_alloc_start2");
+#
+
+let $Q6=
+select sum(l_extendedprice*l_discount) as revenue
+from lineitem
+where l_shipdate >= date '1994-01-01' 
+      and l_shipdate < date '1994-01-01' + interval '1' year
+      and l_discount between 0.06 - 0.01 and 0.06 + 0.01
+      and l_quantity < 24;
+
+flush table lineitem;
+set use_stat_tables='never';
+eval $Q6;
+
+connect (con1, localhost, root,,);
+connect (con2, localhost, root,,);
+
+connection con1;
+set debug_sync='statistics_mem_alloc_start1  WAIT_FOR second_thread_started_too';
+set debug_sync='statistics_mem_alloc_start2  SIGNAL first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+--send_eval $Q6                                            
+
+connection con2;
+set debug_sync='statistics_mem_alloc_start1  SIGNAL second_thread_started_too';
+set debug_sync='statistics_mem_alloc_start2  WAIT_FOR first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+--send_eval $Q6
+
+connection con1;
+--reap
+
+connection con2;
+--reap
+
+connection default;
+set use_stat_tables='preferably';
+disconnect con1;
+disconnect con2;
+set debug_sync='RESET';
+
+#
+# Test for parallel statistics collection
+# 
+#    assumes that start of stats collection code has this line:
+#
+#       DEBUG_SYNC(thd, "statistics_collection_start1");
+#       DEBUG_SYNC(thd, "statistics_collection_start2");
+#
+
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+delete from mysql.index_stat 
+  where table_name='lineitem' and
+        index_name in ('i_l_shipdate', 'i_l_receiptdate');
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+--disable_result_log
+--disable_warnings
+analyze table lineitem persistent for columns() indexes (i_l_shipdate);
+--enable_warnings
+--enable_result_log
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+delete from mysql.index_stat 
+  where table_name='lineitem' and index_name= 'i_l_shipdate';
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+
+connect (con1, localhost, root,,);
+connect (con2, localhost, root,,);
+
+connection con1;
+set debug_sync='statistics_collection_start1  WAIT_FOR second_thread_started_too';
+set debug_sync='statistics_collection_start2  SIGNAL first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+--send analyze table lineitem persistent for columns() indexes (i_l_shipdate)
+
+connection con2;
+set debug_sync='statistics_collection_start1  SIGNAL second_thread_started_too';
+set debug_sync='statistics_collection_start2  WAIT_FOR first_thread_working';
+use dbt3_s001;
+set use_stat_tables='preferably';
+--send analyze table lineitem persistent for columns() indexes (i_l_receiptdate)
+
+connection con1;
+--disable_result_log
+--disable_warnings
+--reap
+--enable_warnings
+--enable_result_log
+
+connection con2;
+--disable_result_log
+--disable_warnings
+--reap
+--enable_warnings
+--enable_result_log
+
+connection default;
+disconnect con1;
+disconnect con2;
+set debug_sync='RESET';
+
+select * from mysql.index_stat where table_name='lineitem' order by index_name;
+
+DROP DATABASE dbt3_s001;
+
+use test;
+
+set use_stat_tables=@save_use_stat_tables;

=== added file 'mysql-test/t/stat_tables_par_innodb.test'
--- a/mysql-test/t/stat_tables_par_innodb.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/stat_tables_par_innodb.test	2012-07-28 00:33:23 +0000
@@ -0,0 +1,12 @@
+--source include/have_innodb.inc
+
+SET SESSION STORAGE_ENGINE='InnoDB';
+
+set @save_optimizer_switch_for_stat_tables_test=@@optimizer_switch;
+set optimizer_switch='extended_keys=on';
+
+--source stat_tables_par.test
+
+set optimizer_switch=@save_optimizer_switch_for_stat_tables_test;
+
+SET SESSION STORAGE_ENGINE=DEFAULT;

=== added file 'mysql-test/t/stat_tables_rbr.test'
--- a/mysql-test/t/stat_tables_rbr.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/stat_tables_rbr.test	2012-09-12 22:33:03 +0000
@@ -0,0 +1,31 @@
+--source include/have_binlog_format_row.inc
+--source include/have_innodb.inc
+--source include/have_partition.inc
+
+--echo #
+--echo # Bug mdev-463: assertion failure when running ANALYZE with RBR on
+--echo # 
+
+SET GLOBAL use_stat_tables = PREFERABLY;
+
+--connect (con1,localhost,root,,)
+CREATE TABLE t1 (i INT) ENGINE=InnoDB;
+ANALYZE TABLE t1;
+
+# Cleanup
+DROP TABLE t1;
+SET GLOBAL use_stat_tables = DEFAULT;
+--disconnect con1
+
+--connection default
+
+SET use_stat_tables = PREFERABLY;
+
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM PARTITION BY HASH(a) PARTITIONS 2;
+ALTER TABLE t1 ANALYZE PARTITION p1;
+--replace_regex /\/\* xid=.* \*\//\/* XID *\// /Server ver: .*, Binlog ver: .*/Server ver: #, Binlog ver: #/ /table_id: [0-9]+/table_id: #/
+SHOW BINLOG EVENTS;
+
+SET use_stat_tables = DEFAULT;
+
+DROP TABLE t1;

=== added file 'mysql-test/t/stat_tables_repl.test'
--- a/mysql-test/t/stat_tables_repl.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/stat_tables_repl.test	2012-09-11 05:22:57 +0000
@@ -0,0 +1,58 @@
+--source include/have_stat_tables.inc
+--source include/master-slave.inc
+--source include/have_binlog_format_row.inc
+
+--echo #
+--echo # Bug mdev-485: unexpected failure with replication of DROP/ALTER table
+--echo #               when RBR is on
+--echo #
+
+CREATE TABLE t1 ( a int, b int ) ENGINE=MyISAM; 
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+DROP TABLE t1;
+
+--sync_slave_with_master
+--connection master
+
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+DROP INDEX idx1 ON t1;
+
+--sync_slave_with_master
+--connection master
+
+DROP TABLE t1;
+
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+ALTER TABLE t1 DROP COLUMN b;
+
+--sync_slave_with_master
+--connection master
+
+DROP TABLE t1;
+
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+ALTER TABLE t1 RENAME to s;
+
+--sync_slave_with_master
+--connection master
+
+DROP TABLE s;
+
+CREATE TABLE t1 ( a int, b int, INDEX idx1(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (2,20), (1,20), (3,30);
+ANALYZE TABLE t1;
+ALTER TABLE t1 CHANGE COLUMN b c int ;
+
+--sync_slave_with_master
+--connection master
+
+DROP TABLE t1;
+
+--source include/rpl_end.inc

=== added file 'mysql-test/t/statistics.test'
--- a/mysql-test/t/statistics.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/statistics.test	2012-08-19 05:18:46 +0000
@@ -0,0 +1,504 @@
+--source include/have_stat_tables.inc
+--source include/have_innodb.inc
+--disable_warnings
+drop table if exists t1,t2;
+--enable_warnings
+
+set @save_use_stat_tables=@@use_stat_tables;
+
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;  
+   
+set use_stat_tables='preferably';
+
+CREATE TABLE t1 (
+  a int NOT NULL PRIMARY KEY,
+  b varchar(32),
+  c char(16),
+  d date,
+  e double,
+  f bit(3),
+  INDEX idx1 (b, e), 
+  INDEX idx2 (c, d),
+  INDEX idx3 (d),
+  INDEX idx4 (e, b, d)
+) ENGINE= MYISAM;
+
+INSERT INTO t1 VALUES
+  (0, NULL, NULL, NULL, NULL, NULL),
+  (7, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'dddddddd', '1990-05-15', 0.1, b'100'),
+  (17, 'vvvvvvvvvvvvv', 'aaaa', '1989-03-12', 0.01, b'101'),
+  (1, 'vvvvvvvvvvvvv', NULL, '1989-03-12', 0.01, b'100'),
+  (12, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.112, b'001'),
+  (23, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.1, b'100'),
+  (8, 'vvvvvvvvvvvvv', 'aaaa', '1999-07-23', 0.1, b'100'),
+  (22, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'aaaa', '1989-03-12', 0.112, b'001'),
+  (31, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'aaaa', '1999-07-23', 0.01, b'001'),
+  (10, NULL, 'aaaa', NULL, 0.01, b'010'),
+  (5, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.1, b'100'),
+  (15, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.1, b'010'),
+  (30, NULL, 'bbbbbb', NULL, NULL, b'100'),
+  (38, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, NULL, NULL),
+  (18, 'zzzzzzzzzzzzzzzzzz', 'ccccccccc', '1990-05-15', 0.01, b'010'),
+  (9, 'yyy', 'bbbbbb', '1998-08-28', 0.01, NULL),
+  (29, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.012, b'010'),
+  (3, 'yyy', 'dddddddd',  '1990-05-15', 0.112, b'010'),
+  (39, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, 0.01, b'100'),
+  (14, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.1, b'100'),
+  (40, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', '1989-03-12', NULL, NULL),
+  (44, NULL, 'aaaa', '1989-03-12', NULL, b'010'),
+  (19, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.012, b'011'),
+  (21, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.112, b'100'),
+  (45, NULL, NULL, '1989-03-12', NULL, b'011'),
+  (2, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'ccccccccc', '1990-05-15', 0.1, b'001'),
+  (35, 'yyy', 'aaaa', '1990-05-15', 0.05, b'011'),
+  (4, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.01, b'101'),
+  (47, NULL, 'aaaa', '1990-05-15', 0.05, b'010'),
+  (42, NULL, 'ccccccccc', '1989-03-12', 0.01, b'010'),
+  (32, NULL, 'bbbbbb', '1990-05-15', 0.01, b'011'),
+  (49, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'aaaa', '1990-05-15', NULL, NULL),
+  (43, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'bbbbbb', '1990-05-15', NULL, b'100'),
+  (37, 'yyy', NULL, '1989-03-12', 0.05, b'011'),
+  (41, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.05, NULL),
+  (34, 'yyy', NULL, NULL, NULL, NULL),
+  (33, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.05, b'011'),
+  (24,  'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1990-05-15', 0.01,  b'101'),
+  (11, 'yyy', 'ccccccccc', '1999-07-23', 0.1, NULL),
+  (25, 'zzzzzzzzzzzzzzzzzz', 'bbb', '1989-03-12', 0.01,  b'101');
+
+ANALYZE TABLE t1;
+
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+SELECT COUNT(*) FROM t1;
+
+SELECT * FROM mysql.column_stat
+  WHERE db_name='test' AND table_name='t1' AND column_name='a';
+SELECT MIN(t1.a), MAX(t1.a), 
+       (SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
+       (SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.a)",
+       (SELECT COUNT(t1.a) FROM t1) /
+       (SELECT COUNT(DISTINCT t1.a) FROM t1) AS "AVG_FREQUENCY(t1.a)"
+FROM t1;
+
+SELECT * FROM mysql.column_stat
+  WHERE db_name='test' AND table_name='t1' AND column_name='b';
+SELECT MIN(t1.b), MAX(t1.b), 
+       (SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
+       (SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.b)",
+       (SELECT COUNT(t1.b) FROM t1) /
+       (SELECT COUNT(DISTINCT t1.b) FROM t1) AS "AVG_FREQUENCY(t1.b)"
+FROM t1;
+
+SELECT * FROM mysql.column_stat 
+  WHERE db_name='test' AND table_name='t1' AND column_name='c';
+SELECT MIN(t1.c), MAX(t1.c), 
+       (SELECT COUNT(*) FROM t1 WHERE t1.c IS NULL) /
+       (SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.c)",
+       (SELECT COUNT(t1.c) FROM t1) /
+       (SELECT COUNT(DISTINCT t1.c) FROM t1) AS "AVG_FREQUENCY(t1.c)"
+FROM t1;
+
+SELECT * FROM mysql.column_stat
+  WHERE db_name='test' AND table_name='t1' AND column_name='d';
+SELECT MIN(t1.d), MAX(t1.d), 
+       (SELECT COUNT(*) FROM t1 WHERE t1.d IS NULL) /
+       (SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.d)",
+       (SELECT COUNT(t1.d) FROM t1) /
+       (SELECT COUNT(DISTINCT t1.d) FROM t1) AS "AVG_FREQUENCY(t1.d)"
+FROM t1;
+
+SELECT * FROM mysql.column_stat
+  WHERE db_name='test' AND table_name='t1' AND column_name='e';
+SELECT MIN(t1.e), MAX(t1.e), 
+       (SELECT COUNT(*) FROM t1 WHERE t1.e IS NULL) /
+       (SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.e)",
+       (SELECT COUNT(t1.e) FROM t1) /
+       (SELECT COUNT(DISTINCT t1.e) FROM t1) AS "AVG_FREQUENCY(t1.e)"
+FROM t1;
+
+SELECT * FROM mysql.index_stat
+  WHERE db_name='test' AND table_name='t1' AND index_name='idx1';
+SELECT 
+  (SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL) /
+  (SELECT COUNT(DISTINCT t1.b) FROM t1 WHERE t1.b IS NOT NULL)
+  AS 'ARITY 1',
+  (SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL) /
+  (SELECT COUNT(DISTINCT t1.b, t1.e) FROM t1
+     WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL) 
+  AS 'ARITY 2';
+
+SELECT * FROM mysql.index_stat
+  WHERE db_name='test' AND table_name='t1' AND index_name='idx2';
+SELECT 
+  (SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL) /
+  (SELECT COUNT(DISTINCT t1.c) FROM t1 WHERE t1.c IS NOT NULL) 
+  AS 'ARITY 1',
+  (SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL) /
+  (SELECT COUNT(DISTINCT t1.c, t1.d) FROM t1
+     WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL)
+  AS 'ARITY 2';
+
+SELECT * FROM mysql.index_stat
+  WHERE db_name='test' AND table_name='t1' AND index_name='idx3';
+SELECT 
+  (SELECT COUNT(*) FROM t1 WHERE t1.d IS NOT NULL) /
+  (SELECT COUNT(DISTINCT t1.d) FROM t1 WHERE t1.d IS NOT NULL)
+  AS 'ARITY 1';
+
+SELECT * FROM mysql.index_stat
+  WHERE db_name='test' AND table_name='t1' AND index_name='idx4';
+SELECT 
+  (SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL) /
+  (SELECT COUNT(DISTINCT t1.e) FROM t1 WHERE t1.e IS NOT NULL)
+  AS 'ARITY 1',
+  (SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL) /
+  (SELECT COUNT(DISTINCT t1.e, t1.b) FROM t1
+         WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL)
+  AS 'ARITY 2',
+  (SELECT COUNT(*) FROM t1
+     WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL) /  
+  (SELECT COUNT(DISTINCT t1.e, t1.b, t1.d) FROM t1
+     WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL)
+  AS 'ARITY 3';
+
+CREATE TABLE t3 (
+  a int NOT NULL PRIMARY KEY,
+  b varchar(32),
+  c char(16),
+  INDEX idx (c)
+) ENGINE=MYISAM;
+
+INSERT INTO t3 VALUES
+  (0, NULL, NULL),
+  (7, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'dddddddd'),
+  (17, 'vvvvvvvvvvvvv', 'aaaa'),
+  (1, 'vvvvvvvvvvvvv', NULL),
+  (12, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd'),
+  (23, 'vvvvvvvvvvvvv', 'dddddddd'),
+  (8, 'vvvvvvvvvvvvv', 'aaaa'),
+  (22, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'aaaa'),
+  (31, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'aaaa'),
+  (10, NULL, 'aaaa'),
+  (5, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd'),
+  (15, 'vvvvvvvvvvvvv', 'ccccccccc'),
+  (30, NULL, 'bbbbbb'),
+  (38, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb'),
+  (18, 'zzzzzzzzzzzzzzzzzz', 'ccccccccc'),
+  (9, 'yyy', 'bbbbbb'),
+  (29, 'vvvvvvvvvvvvv', 'dddddddd');
+
+ANALYZE TABLE t3;
+
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ALTER TABLE t1 RENAME TO s1;
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+RENAME TABLE s1 TO t1;
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+DROP TABLE t3;
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+
+CREATE TEMPORARY TABLE t0 (
+  a int NOT NULL PRIMARY KEY,
+  b varchar(32)
+);
+INSERT INTO t0 SELECT a,b FROM t1;
+
+ALTER TABLE t1 CHANGE COLUMN b x varchar(32), 
+               CHANGE COLUMN e y double;
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+
+ALTER TABLE t1 CHANGE COLUMN x b varchar(32), 
+               CHANGE COLUMN y e double;
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+
+ALTER TABLE t1 RENAME TO s1, CHANGE COLUMN b x varchar(32);
+SHOW CREATE TABLE s1;
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+ 
+ALTER TABLE s1 RENAME TO t1, CHANGE COLUMN x b varchar(32);
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ALTER TABLE t1 CHANGE COLUMN b x varchar(30);
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ALTER TABLE t1 CHANGE COLUMN x b varchar(32);
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx4);
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval
+SELECT * INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/save_column_stat'
+  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n'
+  FROM mysql.column_stat WHERE column_name='b';
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval
+SELECT * INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/save_index_stat'
+  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n'
+  FROM mysql.index_stat WHERE index_name IN ('idx1', 'idx4');
+
+ALTER TABLE t1 CHANGE COLUMN b x varchar(30);
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ALTER TABLE t1 CHANGE COLUMN x b varchar(32);
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval
+LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/save_column_stat'
+  INTO TABLE mysql.column_stat
+  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n';
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval
+LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/save_index_stat'
+  INTO TABLE mysql.index_stat
+  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n';
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+remove_file $MYSQLTEST_VARDIR/tmp/save_column_stat;
+remove_file $MYSQLTEST_VARDIR/tmp/save_index_stat;
+
+
+ALTER TABLE t1 DROP COLUMN b;
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+DROP INDEX idx2 ON t1;
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.index_stat;
+
+DROP INDEX idx1 ON t1;
+DROP INDEX idx4 ON t1;
+SHOW CREATE TABLE t1;
+
+ALTER TABLE t1 ADD COLUMN b varchar(32);
+CREATE INDEX idx1 ON t1(b, e);
+CREATE INDEX idx2 ON t1(c, d);
+CREATE INDEX idx4 ON t1(e, b, d);
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+UPDATE t1 SET b=(SELECT b FROM t0 WHERE t0.a= t1.a);
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ALTER TABLE t1 DROP COLUMN b,
+               DROP INDEX idx1, DROP INDEX idx2, DROP INDEX idx4;
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ALTER TABLE t1 ADD COLUMN b varchar(32);
+ALTER TABLE t1 
+  ADD INDEX idx1 (b, e), ADD INDEX idx2 (c, d), ADD INDEX idx4 (e, b, d);
+UPDATE t1 SET b=(SELECT b FROM t0 WHERE t0.a= t1.a);
+SHOW CREATE TABLE t1;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(b) INDEXES(idx1, idx2, idx4);
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS() INDEXES();
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS(c,e,b) INDEXES(idx2,idx4);
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+DELETE FROM mysql.index_stat WHERE table_name='t1' AND index_name='primary';
+SELECT * FROM mysql.index_stat;
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS() INDEXES(primary);
+SELECT * FROM mysql.index_stat;
+
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+
+ANALYZE TABLE t1 PERSISTENT FOR COLUMNS ALL INDEXES ALL;
+
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+
+CREATE TABLE t2 LIKE t1;
+ALTER TABLE t2 ENGINE=InnoDB;
+INSERT INTO t2 SELECT * FROM t1;
+
+ANALYZE TABLE t2;
+
+SELECT * FROM mysql.table_stat;
+SELECT * FROM mysql.column_stat ORDER BY column_name;
+SELECT * FROM mysql.index_stat ORDER BY index_name, prefix_arity, table_name;
+
+
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+
+ALTER TABLE t1
+  DROP INDEX idx1,
+  DROP INDEX idx4;
+ALTER TABLE t1
+  MODIFY COLUMN b text,
+  ADD INDEX idx1 (b(4), e), 
+  ADD INDEX idx4 (e, b(4), d);
+  
+ANALYZE TABLE t1;
+
+SELECT * FROM mysql.column_stat;
+SELECT * FROM mysql.index_stat;
+
+DROP TABLE t1,t2;
+
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+
+set use_stat_tables='never';  
+
+set names utf8;
+
+CREATE DATABASE world;
+
+use world;
+
+--source include/world_schema_utf8.inc
+
+--disable_query_log
+--disable_result_log
+--disable_warnings
+--source include/world.inc
+--enable_warnings
+--enable_result_log
+--enable_query_log
+
+set use_stat_tables='preferably';
+
+--disable_result_log
+ANALYZE TABLE Country, City, CountryLanguage;
+--enable_result_log
+
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+  FROM mysql.table_stat;
+SELECT UPPER(db_name), UPPER(table_name), 
+       column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+  FROM mysql.column_stat;
+SELECT UPPER(db_name), UPPER(table_name),
+       index_name, prefix_arity, avg_frequency
+  FROM mysql.index_stat;
+
+use test;
+
+set use_stat_tables='never'; 
+
+CREATE DATABASE world_innodb;
+
+use world_innodb;
+
+--source include/world_schema_utf8.inc
+
+ALTER TABLE Country ENGINE=InnoDB;
+ALTER TABLE City ENGINE=InnoDB;
+ALTER TABLE CountryLanguage ENGINE=InnoDB;
+
+--disable_query_log
+--disable_result_log
+--disable_warnings
+--source include/world.inc
+--enable_warnings
+--enable_result_log
+--enable_query_log
+
+set use_stat_tables='preferably';
+
+--disable_result_log
+ANALYZE TABLE Country, City, CountryLanguage;
+--enable_result_log
+
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+  FROM mysql.table_stat;
+SELECT UPPER(db_name), UPPER(table_name), 
+       column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+  FROM mysql.column_stat;
+SELECT UPPER(db_name), UPPER(table_name),
+       index_name, prefix_arity, avg_frequency
+  FROM mysql.index_stat;
+
+use test;
+
+DROP DATABASE world;
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+  FROM mysql.table_stat;
+SELECT UPPER(db_name), UPPER(table_name), 
+       column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+  FROM mysql.column_stat;
+SELECT UPPER(db_name), UPPER(table_name),
+       index_name, prefix_arity, avg_frequency
+  FROM mysql.index_stat;
+
+DROP DATABASE world_innodb;
+SELECT UPPER(db_name), UPPER(table_name), cardinality
+  FROM mysql.table_stat;
+SELECT UPPER(db_name), UPPER(table_name), 
+       column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
+  FROM mysql.column_stat;
+SELECT UPPER(db_name), UPPER(table_name),
+       index_name, prefix_arity, avg_frequency
+  FROM mysql.index_stat;
+
+DELETE FROM mysql.table_stat;
+DELETE FROM mysql.column_stat;
+DELETE FROM mysql.index_stat;
+  
+set use_stat_tables=@save_use_stat_tables;
+
+    
\ No newline at end of file

=== modified file 'mysql-test/t/system_mysql_db_fix40123.test'
--- a/mysql-test/t/system_mysql_db_fix40123.test	2012-02-23 06:50:11 +0000
+++ b/mysql-test/t/system_mysql_db_fix40123.test	2012-03-19 08:35:32 +0000
@@ -59,6 +59,11 @@
 
 CREATE TABLE time_zone_leap_second (   Transition_time bigint signed NOT NULL,   Correction int signed NOT NULL,   PRIMARY KEY TranTime (Transition_time) ) engine=MyISAM CHARACTER SET utf8   comment='Leap seconds information for time zones';
 
+CREATE TABLE table_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, cardinality bigint(21) unsigned DEFAULT NULL, PRIMARY KEY (db_name,table_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Tables';
+
+CREATE TABLE column_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, column_name varchar(64) NOT NULL, min_value varchar(255) DEFAULT NULL, max_value varchar(255) DEFAULT NULL, nulls_ratio double DEFAULT NULL, avg_length double DEFAULT NULL, avg_frequency double DEFAULT NULL, PRIMARY KEY (db_name,table_name,column_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Columns';
+
+CREATE TABLE index_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, index_name varchar(64) NOT NULL, prefix_arity int(11) unsigned NOT NULL, avg_frequency double DEFAULT NULL, PRIMARY KEY (db_name,table_name,index_name,prefix_arity) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Indexes';
 
 # Run the mysql_fix_privilege_tables.sql using "mysql --force"
 --exec $MYSQL --force test < $MYSQL_FIX_PRIVILEGE_TABLES
@@ -72,7 +77,7 @@
 -- disable_query_log
 
 # Drop all tables created by this test
-DROP TABLE db, host, user, func, plugin, tables_priv, columns_priv, procs_priv, servers, help_category, help_keyword, help_relation, help_topic, proc, time_zone, time_zone_leap_second, time_zone_name, time_zone_transition, time_zone_transition_type, general_log, slow_log, event, ndb_binlog_index, proxies_priv;
+DROP TABLE db, host, user, func, plugin, tables_priv, columns_priv, procs_priv, servers, help_category, help_keyword, help_relation, help_topic, proc, time_zone, time_zone_leap_second, time_zone_name, time_zone_transition, time_zone_transition_type, general_log, slow_log, event, ndb_binlog_index, proxies_priv, table_stat, column_stat, index_stat;
 
 -- enable_query_log
 

=== modified file 'mysql-test/t/system_mysql_db_fix50030.test'
--- a/mysql-test/t/system_mysql_db_fix50030.test	2012-02-23 06:50:11 +0000
+++ b/mysql-test/t/system_mysql_db_fix50030.test	2012-03-19 08:35:32 +0000
@@ -66,6 +66,12 @@
 
 INSERT INTO servers VALUES ('test','localhost','test','root','', 0,'','mysql','root');
 
+CREATE TABLE table_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, cardinality bigint(21) unsigned DEFAULT NULL, PRIMARY KEY (db_name,table_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Tables';
+
+CREATE TABLE column_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, column_name varchar(64) NOT NULL, min_value varchar(255) DEFAULT NULL, max_value varchar(255) DEFAULT NULL, nulls_ratio double DEFAULT NULL, avg_length double DEFAULT NULL, avg_frequency double DEFAULT NULL, PRIMARY KEY (db_name,table_name,column_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Columns';
+
+CREATE TABLE index_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, index_name varchar(64) NOT NULL, prefix_arity int(11) unsigned NOT NULL, avg_frequency double DEFAULT NULL, PRIMARY KEY (db_name,table_name,index_name,prefix_arity) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Indexes';
+
 # Run the mysql_fix_privilege_tables.sql using "mysql --force"
 --exec $MYSQL --force test < $MYSQL_FIX_PRIVILEGE_TABLES
 
@@ -78,7 +84,7 @@
 -- disable_query_log
 
 # Drop all tables created by this test
-DROP TABLE db, host, user, func, plugin, tables_priv, columns_priv, procs_priv, servers, help_category, help_keyword, help_relation, help_topic, proc, time_zone, time_zone_leap_second, time_zone_name, time_zone_transition, time_zone_transition_type, general_log, slow_log, event, ndb_binlog_index, proxies_priv;
+DROP TABLE db, host, user, func, plugin, tables_priv, columns_priv, procs_priv, servers, help_category, help_keyword, help_relation, help_topic, proc, time_zone, time_zone_leap_second, time_zone_name, time_zone_transition, time_zone_transition_type, general_log, slow_log, event, ndb_binlog_index, proxies_priv, table_stat, column_stat, index_stat;
 
 -- enable_query_log
 

=== modified file 'mysql-test/t/system_mysql_db_fix50117.test'
--- a/mysql-test/t/system_mysql_db_fix50117.test	2012-02-23 06:50:11 +0000
+++ b/mysql-test/t/system_mysql_db_fix50117.test	2012-03-19 08:35:32 +0000
@@ -85,6 +85,12 @@
 
 CREATE TABLE IF NOT EXISTS ndb_binlog_index (Position BIGINT UNSIGNED NOT NULL, File VARCHAR(255) NOT NULL, epoch BIGINT UNSIGNED NOT NULL, inserts BIGINT UNSIGNED NOT NULL, updates BIGINT UNSIGNED NOT NULL, deletes BIGINT UNSIGNED NOT NULL, schemaops BIGINT UNSIGNED NOT NULL, PRIMARY KEY(epoch)) ENGINE=MYISAM;
 
+CREATE TABLE table_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, cardinality bigint(21) unsigned DEFAULT NULL, PRIMARY KEY (db_name,table_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Tables';
+
+CREATE TABLE column_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, column_name varchar(64) NOT NULL, min_value varchar(255) DEFAULT NULL, max_value varchar(255) DEFAULT NULL, nulls_ratio double DEFAULT NULL, avg_length double DEFAULT NULL, avg_frequency double DEFAULT NULL, PRIMARY KEY (db_name,table_name,column_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Columns';
+
+CREATE TABLE index_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, index_name varchar(64) NOT NULL, prefix_arity int(11) unsigned NOT NULL, avg_frequency double DEFAULT NULL, PRIMARY KEY (db_name,table_name,index_name,prefix_arity) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Indexes';
+
 # Run the mysql_fix_privilege_tables.sql using "mysql --force"
 --exec $MYSQL --force test < $MYSQL_FIX_PRIVILEGE_TABLES
 
@@ -97,7 +103,7 @@
 -- disable_query_log
 
 # Drop all tables created by this test
-DROP TABLE db, host, user, func, plugin, tables_priv, columns_priv, procs_priv, servers, help_category, help_keyword, help_relation, help_topic, proc, time_zone, time_zone_leap_second, time_zone_name, time_zone_transition, time_zone_transition_type, general_log, slow_log, event, ndb_binlog_index, proxies_priv;
+DROP TABLE db, host, user, func, plugin, tables_priv, columns_priv, procs_priv, servers, help_category, help_keyword, help_relation, help_topic, proc, time_zone, time_zone_leap_second, time_zone_name, time_zone_transition, time_zone_transition_type, general_log, slow_log, event, ndb_binlog_index, proxies_priv, table_stat, column_stat, index_stat;
 
 -- enable_query_log
 

=== modified file 'scripts/mysql_system_tables.sql'
--- a/scripts/mysql_system_tables.sql	2012-01-13 14:50:02 +0000
+++ b/scripts/mysql_system_tables.sql	2012-06-26 05:33:07 +0000
@@ -482,3 +482,9 @@
 
 -- Remember for later if proxies_priv table already existed
 set @had_proxies_priv_table= @@warning_count != 0;
+
+CREATE TABLE IF NOT EXISTS table_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, cardinality bigint(21) unsigned DEFAULT NULL, PRIMARY KEY (db_name,table_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Tables';
+
+CREATE TABLE IF NOT EXISTS column_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, column_name varchar(64) NOT NULL, min_value varchar(255) DEFAULT NULL, max_value varchar(255) DEFAULT NULL, nulls_ratio decimal(12,4) DEFAULT NULL, avg_length decimal(12,4) DEFAULT NULL, avg_frequency decimal(12,4) DEFAULT NULL, PRIMARY KEY (db_name,table_name,column_name) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Columns';
+
+CREATE TABLE IF NOT EXISTS index_stat (db_name varchar(64) NOT NULL, table_name varchar(64) NOT NULL, index_name varchar(64) NOT NULL, prefix_arity int(11) unsigned NOT NULL, avg_frequency decimal(12,4) DEFAULT NULL, PRIMARY KEY (db_name,table_name,index_name,prefix_arity) ) ENGINE=MyISAM CHARACTER SET utf8 COLLATE utf8_bin comment='Statistics on Indexes';

=== modified file 'sql/CMakeLists.txt'
--- a/sql/CMakeLists.txt	2012-08-09 15:22:00 +0000
+++ b/sql/CMakeLists.txt	2012-08-14 19:42:14 +0000
@@ -62,7 +62,8 @@
                sql_list.cc sql_load.cc sql_manager.cc sql_parse.cc
                sql_partition.cc sql_plugin.cc sql_prepare.cc sql_rename.cc 
                debug_sync.cc debug_sync.h
-               sql_repl.cc sql_select.cc sql_show.cc sql_state.c sql_string.cc
+               sql_repl.cc sql_select.cc sql_show.cc sql_state.c
+               sql_statistics.cc sql_string.cc 
                sql_table.cc sql_test.cc sql_trigger.cc sql_udf.cc sql_union.cc
                sql_update.cc sql_view.cc strfunc.cc table.cc thr_malloc.cc 
                sql_time.cc tztime.cc uniques.cc unireg.cc item_xmlfunc.cc 

=== modified file 'sql/field.cc'
--- a/sql/field.cc	2012-09-08 22:22:06 +0000
+++ b/sql/field.cc	2012-11-03 03:38:05 +0000
@@ -76,7 +76,7 @@
 ((ulong) ((LL(1) << min(arg, 4) * 8) - LL(1)))
 
 #define ASSERT_COLUMN_MARKED_FOR_READ DBUG_ASSERT(!table || (!table->read_set || bitmap_is_set(table->read_set, field_index)))
-#define ASSERT_COLUMN_MARKED_FOR_WRITE_OR_COMPUTED DBUG_ASSERT(!table || (!table->write_set || bitmap_is_set(table->write_set, field_index) || bitmap_is_set(table->vcol_set, field_index)))
+#define ASSERT_COLUMN_MARKED_FOR_WRITE_OR_COMPUTED DBUG_ASSERT(is_stat_field || !table || (!table->write_set || bitmap_is_set(table->write_set, field_index) || bitmap_is_set(table->vcol_set, field_index)))
 
 #define FLAGSTR(S,F) ((S) & (F) ? #F " " : "")
 
@@ -1180,11 +1180,11 @@
   if (str == int_end || error == MY_ERRNO_EDOM)
   {
     ErrConvString err(str, length, cs);
-    push_warning_printf(table->in_use, MYSQL_ERROR::WARN_LEVEL_WARN,
+    push_warning_printf(get_thd(), MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_TRUNCATED_WRONG_VALUE_FOR_FIELD, 
                         ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
                         "integer", err.ptr(), field_name,
-                        (ulong) table->in_use->warning_info->current_row_for_warning());
+                        (ulong) get_thd()->warning_info->current_row_for_warning());
     return 1;
   }
   /* Test if we have garbage at the end of the given string. */
@@ -1253,7 +1253,7 @@
       goto out_of_range;
     }
   }
-  if (table->in_use->count_cuted_fields &&
+  if (get_thd()->count_cuted_fields &&
       check_int(cs, from, len, end, error))
     return 1;
   return 0;
@@ -1324,13 +1324,16 @@
   option_struct(0), key_start(0), part_of_key(0),
   part_of_key_not_clustered(0), part_of_sortkey(0),
   unireg_check(unireg_check_arg), field_length(length_arg),
-  null_bit(null_bit_arg), is_created_from_null_item(FALSE), vcol_info(0),
+  null_bit(null_bit_arg), is_created_from_null_item(FALSE),
+  read_stats(NULL), collected_stats(0),
+  vcol_info(0),
   stored_in_db(TRUE)
 {
   flags=null_ptr ? 0: NOT_NULL_FLAG;
   comment.str= (char*) "";
   comment.length=0;
-  field_index= 0;
+  field_index= 0;   
+  is_stat_field= FALSE;
 }
 
 
@@ -1430,10 +1433,11 @@
                  enum_check_fields check_level)
 {
   int res;
-  enum_check_fields old_check_level= table->in_use->count_cuted_fields;
-  table->in_use->count_cuted_fields= check_level;
+  THD *thd= get_thd();
+  enum_check_fields old_check_level= thd->count_cuted_fields;
+  thd->count_cuted_fields= check_level;
   res= store(to, length, cs);
-  table->in_use->count_cuted_fields= old_check_level;
+  thd->count_cuted_fields= old_check_level;
   return res;
 }
 
@@ -1855,6 +1859,32 @@
 }
 
 
+
+Field *Field::clone(MEM_ROOT *root, TABLE *new_table, my_ptrdiff_t diff,
+                    bool stat_flag)
+{
+  Field *tmp;
+  if ((tmp= (Field*) memdup_root(root,(char*) this,size_of())))
+  {
+    tmp->init(new_table);
+    tmp->move_field_offset(diff);
+  }
+  tmp->is_stat_field= stat_flag;
+  return tmp;
+}
+
+
+Field *Field::clone(MEM_ROOT *root, my_ptrdiff_t diff)
+{
+  Field *tmp;
+  if ((tmp= (Field*) memdup_root(root,(char*) this,size_of())))
+  {
+    tmp->move_field_offset(diff);
+  }
+  return tmp;
+}
+
+
 /****************************************************************************
   Field_null, a field that always return NULL
 ****************************************************************************/
@@ -1969,7 +1999,7 @@
   uchar *left_wall,*right_wall;
   uchar tmp_char;
   /*
-    To remember if table->in_use->cuted_fields has already been incremented,
+    To remember if get_thd()->cuted_fields has already been incremented,
     to do that only once
   */
   bool is_cuted_fields_incr=0;
@@ -2060,7 +2090,7 @@
     it makes the code easer to read.
   */
 
-  if (table->in_use->count_cuted_fields)
+  if (get_thd()->count_cuted_fields)
   {
     // Skip end spaces
     for (;from != end && my_isspace(&my_charset_bin, *from); from++) ;
@@ -2212,7 +2242,7 @@
   
   /*
     Write digits of the frac_% parts ;
-    Depending on table->in_use->count_cutted_fields, we may also want
+    Depending on get_thd()->count_cutted_fields, we may also want
     to know if some non-zero tail of these parts will
     be truncated (for example, 0.002->0.00 will generate a warning,
     while 0.000->0.00 will not)
@@ -2230,7 +2260,7 @@
     {
       if (pos == right_wall) 
       {
-        if (table->in_use->count_cuted_fields && !is_cuted_fields_incr) 
+        if (get_thd()->count_cuted_fields && !is_cuted_fields_incr) 
           break; // Go on below to see if we lose non zero digits
         return 0;
       }
@@ -2651,20 +2681,21 @@
   ASSERT_COLUMN_MARKED_FOR_WRITE_OR_COMPUTED;
   int err;
   my_decimal decimal_value;
+  THD *thd= get_thd();
   DBUG_ENTER("Field_new_decimal::store(char*)");
 
   if ((err= str2my_decimal(E_DEC_FATAL_ERROR &
                            ~(E_DEC_OVERFLOW | E_DEC_BAD_NUM),
                            from, length, charset_arg,
                            &decimal_value)) &&
-      table->in_use->abort_on_warning)
+      thd->abort_on_warning)
   {
     ErrConvString errmsg(from, length, &my_charset_bin);
-    push_warning_printf(table->in_use, MYSQL_ERROR::WARN_LEVEL_WARN,
+    push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_TRUNCATED_WRONG_VALUE_FOR_FIELD,
                         ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
                         "decimal", errmsg.ptr(), field_name,
-                        (ulong) table->in_use->warning_info->current_row_for_warning());
+                        (ulong) thd->warning_info->current_row_for_warning());
 
     DBUG_RETURN(err);
   }
@@ -2680,11 +2711,11 @@
   case E_DEC_BAD_NUM:
     {
       ErrConvString errmsg(from, length, &my_charset_bin);
-      push_warning_printf(table->in_use, MYSQL_ERROR::WARN_LEVEL_WARN,
+      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                           ER_TRUNCATED_WRONG_VALUE_FOR_FIELD,
                           ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
                           "decimal", errmsg.ptr(), field_name,
-                          (ulong) table->in_use->warning_info->
+                          (ulong) thd->warning_info->
                           current_row_for_warning());
       my_decimal_set_zero(&decimal_value);
       break;
@@ -2712,6 +2743,7 @@
   ASSERT_COLUMN_MARKED_FOR_WRITE_OR_COMPUTED;
   my_decimal decimal_value;
   int err;
+  THD *thd= get_thd();
   DBUG_ENTER("Field_new_decimal::store(double)");
 
   err= double2my_decimal(E_DEC_FATAL_ERROR & ~E_DEC_OVERFLOW, nr,
@@ -2721,11 +2753,11 @@
     if (check_overflow(err))
       set_value_on_overflow(&decimal_value, decimal_value.sign());
     /* Only issue a warning if store_value doesn't issue an warning */
-    table->in_use->got_warning= 0;
+    thd->got_warning= 0;
   }
   if (store_value(&decimal_value))
     err= 1;
-  else if (err && !table->in_use->got_warning)
+  else if (err && !thd->got_warning)
     err= warn_if_overflow(err);
   DBUG_RETURN(err);
 }
@@ -2743,11 +2775,11 @@
     if (check_overflow(err))
       set_value_on_overflow(&decimal_value, decimal_value.sign());
     /* Only issue a warning if store_value doesn't issue an warning */
-    table->in_use->got_warning= 0;
+    get_thd()->got_warning= 0;
   }
   if (store_value(&decimal_value))
     err= 1;
-  else if (err && !table->in_use->got_warning)
+  else if (err && !get_thd()->got_warning)
     err= warn_if_overflow(err);
   return err;
 }
@@ -3643,7 +3675,7 @@
   ASSERT_COLUMN_MARKED_FOR_READ;
   int32 j;
   /* See the comment in Field_long::store(long long) */
-  DBUG_ASSERT(table->in_use == current_thd);
+  DBUG_ASSERT(!table || table->in_use == current_thd);
   j=sint4korr(ptr);
   return unsigned_flag ? (longlong) (uint32) j : (longlong) j;
 }
@@ -3725,7 +3757,7 @@
     set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
     error= 1;
   }
-  else if (table->in_use->count_cuted_fields && 
+  else if (get_thd()->count_cuted_fields && 
            check_int(cs, from, len, end, error))
     error= 1;
   else
@@ -3877,7 +3909,7 @@
   char *end;
   double nr= my_strntod(cs,(char*) from,len,&end,&error);
   if (error || (!len || ((uint) (end-from) != len &&
-                         table->in_use->count_cuted_fields)))
+                         get_thd()->count_cuted_fields)))
   {
     set_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                 (error ? ER_WARN_DATA_OUT_OF_RANGE : WARN_DATA_TRUNCATED), 1);
@@ -4065,7 +4097,7 @@
   char *end;
   double nr= my_strntod(cs,(char*) from, len, &end, &error);
   if (error || (!len || ((uint) (end-from) != len &&
-                         table->in_use->count_cuted_fields)))
+                         get_thd()->count_cuted_fields)))
   {
     set_warning(MYSQL_ERROR::WARN_LEVEL_WARN,
                 (error ? ER_WARN_DATA_OUT_OF_RANGE : WARN_DATA_TRUNCATED), 1);
@@ -4513,10 +4545,11 @@
 
 int Field_timestamp::store_time_dec(MYSQL_TIME *ltime, uint dec)
 {
-  THD *thd= table->in_use;
   int unused;
   MYSQL_TIME l_time= *ltime;
   ErrConvTime str(ltime);
+  THD *thd= get_thd();
+
   bool valid= !check_date(&l_time, pack_time(&l_time) != 0,
                           (thd->variables.sql_mode & MODE_NO_ZERO_DATE) |
                                        MODE_NO_ZERO_IN_DATE, &unused);
@@ -4531,7 +4564,7 @@
   int error;
   int have_smth_to_conv;
   ErrConvString str(from, len, cs);
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
 
   /* We don't want to store invalid or fuzzy datetime values in TIMESTAMP */
   have_smth_to_conv= (str_to_datetime(cs, from, len, &l_time,
@@ -4548,7 +4581,7 @@
   MYSQL_TIME l_time;
   int error;
   ErrConvDouble str(nr);
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
 
   longlong tmp= double_to_datetime(nr, &l_time, (thd->variables.sql_mode &
                                                  MODE_NO_ZERO_DATE) |
@@ -4562,7 +4595,7 @@
   MYSQL_TIME l_time;
   int error;
   ErrConvInteger str(nr);
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
 
   /* We don't want to store invalid or fuzzy datetime values in TIMESTAMP */
   longlong tmp= number_to_datetime(nr, 0, &l_time, (thd->variables.sql_mode &
@@ -4654,7 +4687,7 @@
 
 bool Field_timestamp::get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
 {
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   thd->time_zone_used= 1;
   ulong sec_part;
   my_time_t temp= get_timestamp(&sec_part);
@@ -4707,7 +4740,7 @@
 
 int Field_timestamp::set_time()
 {
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   set_notnull();
   store_TIME(thd->query_start(), 0);
   return 0;
@@ -4856,7 +4889,7 @@
   int error;
   MYSQL_TIME ltime;
   longlong tmp;
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   ErrConvDecimal str(d);
 
   if (my_decimal2seconds(d, &nr, &sec_part))
@@ -4874,7 +4907,7 @@
 
 int Field_timestamp_hires::set_time()
 {
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   set_notnull();
   store_TIME(thd->query_start(), thd->query_start_sec_part());
   return 0;
@@ -4993,7 +5026,7 @@
   MYSQL_TIME ltime;
   int error;
   enum enum_mysql_timestamp_type func_res;
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   ErrConvString str(from, len, cs);
 
   func_res= str_to_datetime(cs, from, len, &ltime,
@@ -5010,7 +5043,7 @@
 {
   int error= 0;
   MYSQL_TIME ltime;
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   ErrConvDouble str(nr);
 
   longlong tmp= double_to_datetime(nr, &ltime,
@@ -5028,7 +5061,7 @@
   int error;
   MYSQL_TIME ltime;
   longlong tmp;
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   ErrConvInteger str(nr);
 
   tmp= number_to_datetime(nr, 0, &ltime, (TIME_FUZZY_DATE |
@@ -5093,7 +5126,7 @@
   int was_cut;
   int have_smth_to_conv=
     str_to_time(cs, from, len, &ltime,
-                table->in_use->variables.sql_mode &
+                get_thd()->variables.sql_mode &
                 (MODE_NO_ZERO_DATE | MODE_NO_ZERO_IN_DATE |
                  MODE_INVALID_DATES),
                 &was_cut) > MYSQL_TIMESTAMP_ERROR;
@@ -5199,7 +5232,7 @@
  
 bool Field_time::get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
 {
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   if (!(fuzzydate & (TIME_FUZZY_DATE|TIME_TIME_ONLY)))
   {
     push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
@@ -5389,7 +5422,7 @@
     set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
     return 1;
   }
-  if (table->in_use->count_cuted_fields && 
+  if (get_thd()->count_cuted_fields && 
       (error= check_int(cs, from, len, end, error)))
   {
     if (error == 1)  /* empty or incorrect string */
@@ -5849,7 +5882,7 @@
   int error;
   MYSQL_TIME ltime;
   longlong tmp;
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   ErrConvDecimal str(d);
 
   if (my_decimal2seconds(d, &nr, &sec_part))
@@ -5986,7 +6019,9 @@
 {
   const char *pos;
   char tmp[32];
-  THD *thd= field->table->in_use;
+  THD *thd;
+
+  thd= field->get_thd();
 
   if (!(pos= well_formed_error_pos) &&
       !(pos= cannot_convert_error_pos))
@@ -6028,11 +6063,12 @@
 Field_longstr::report_if_important_data(const char *pstr, const char *end,
                                         bool count_spaces)
 {
-  if ((pstr < end) && table->in_use->count_cuted_fields)
+  THD *thd= get_thd();
+  if ((pstr < end) && thd->count_cuted_fields)
   {
     if (test_if_important_data(field_charset, pstr, end))
     {
-      if (table->in_use->abort_on_warning)
+      if (thd->abort_on_warning)
         set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_DATA_TOO_LONG, 1);
       else
         set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
@@ -6059,7 +6095,7 @@
   const char *from_end_pos;
 
   /* See the comment for Field_long::store(long long) */
-  DBUG_ASSERT(table->in_use == current_thd);
+  DBUG_ASSERT(!table || table->in_use == current_thd);
 
   copy_length= well_formed_copy_nchars(field_charset,
                                        (char*) ptr, field_length,
@@ -6105,7 +6141,7 @@
 
   if (error)
   {
-    if (table->in_use->abort_on_warning)
+    if (get_thd()->abort_on_warning)
       set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_DATA_TOO_LONG, 1);
     else
       set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
@@ -6165,7 +6201,7 @@
   double result;
   
   result=  my_strntod(cs,(char*) ptr,field_length,&end,&error);
-  if (!table->in_use->no_errors &&
+  if (!get_thd()->no_errors &&
       (error || (field_length != (uint32)(end - (char*) ptr) && 
                  !check_if_only_end_space(cs, end,
                                           (char*) ptr + field_length))))
@@ -6189,7 +6225,7 @@
   longlong result;
 
   result= my_strntoll(cs, (char*) ptr,field_length,10,&end,&error);
-  if (!table->in_use->no_errors &&
+  if (!get_thd()->no_errors &&
       (error || (field_length != (uint32)(end - (char*) ptr) && 
                  !check_if_only_end_space(cs, end,
                                           (char*) ptr + field_length))))
@@ -6209,9 +6245,9 @@
 {
   ASSERT_COLUMN_MARKED_FOR_READ;
   /* See the comment for Field_long::store(long long) */
-  DBUG_ASSERT(table->in_use == current_thd);
+  DBUG_ASSERT(!table || table->in_use == current_thd);
   uint length;
-  if (table->in_use->variables.sql_mode &
+  if (get_thd()->variables.sql_mode &
       MODE_PAD_CHAR_TO_FULL_LENGTH)
     length= my_charpos(field_charset, ptr, ptr + field_length,
                        field_length / field_charset->mbmaxlen);
@@ -6228,7 +6264,7 @@
   ASSERT_COLUMN_MARKED_FOR_READ;
   int err= str2my_decimal(E_DEC_FATAL_ERROR, (char*) ptr, field_length,
                           charset(), decimal_value);
-  if (!table->in_use->no_errors && err)
+  if (!get_thd()->no_errors && err)
   {
     ErrConvString errmsg((char*) ptr, field_length, charset());
     push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
@@ -6612,7 +6648,7 @@
   uint length= length_bytes == 1 ? (uint) *ptr : uint2korr(ptr);
   result= my_strntod(cs, (char*)ptr+length_bytes, length, &end, &error);
   
-  if (!table->in_use->no_errors && 
+  if (!get_thd()->no_errors && 
        (error || (length != (uint)(end - (char*)ptr+length_bytes) && 
          !check_if_only_end_space(cs, end, (char*)ptr+length_bytes+length)))) 
   {
@@ -6635,7 +6671,7 @@
   longlong result= my_strntoll(cs, (char*) ptr+length_bytes, length, 10,
                      &end, &error);
 		     
-  if (!table->in_use->no_errors && 
+  if (!get_thd()->no_errors && 
        (error || (length != (uint)(end - (char*)ptr+length_bytes) && 
          !check_if_only_end_space(cs, end, (char*)ptr+length_bytes+length)))) 
   {
@@ -6664,7 +6700,7 @@
   int error= str2my_decimal(E_DEC_FATAL_ERROR, (char*) ptr+length_bytes, length,
                  cs, decimal_value);
 
-  if (!table->in_use->no_errors && error)
+  if (!get_thd()->no_errors && error)
   {
     push_numerical_conversion_warning(current_thd, (char*)ptr+length_bytes, 
                                       length, cs, "DECIMAL", 
@@ -7645,7 +7681,7 @@
 	tmp=0;
 	set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
       }
-      if (!table->in_use->count_cuted_fields)
+      if (!get_thd()->count_cuted_fields)
         err= 0;
     }
     else
@@ -7669,7 +7705,7 @@
   if ((ulonglong) nr > typelib->count || nr == 0)
   {
     set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
-    if (nr != 0 || table->in_use->count_cuted_fields)
+    if (nr != 0 || get_thd()->count_cuted_fields)
     {
       nr= 0;
       error= 1;
@@ -8199,7 +8235,7 @@
   {
     set_rec_bits((1 << bit_len) - 1, bit_ptr, bit_ofs, bit_len);
     memset(ptr, 0xff, bytes_in_rec);
-    if (table->in_use->really_abort_on_warning())
+    if (get_thd()->really_abort_on_warning())
       set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_DATA_TOO_LONG, 1);
     else
       set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
@@ -8634,7 +8670,7 @@
     memset(ptr, 0xff, bytes_in_rec);
     if (bits)
       *ptr&= ((1 << bits) - 1); /* set first uchar */
-    if (table->in_use->really_abort_on_warning())
+    if (get_thd()->really_abort_on_warning())
       set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_DATA_TOO_LONG, 1);
     else
       set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);
@@ -9750,7 +9786,7 @@
                                  uint code, const ErrConv *str,
                                  timestamp_type ts_type, int cuted_increment)
 {
-  THD *thd= table->in_use;
+  THD *thd= get_thd();
   if (thd->really_abort_on_warning() && level >= MYSQL_ERROR::WARN_LEVEL_WARN)
     make_truncated_value_warning(thd, level, str, ts_type, field_name);
   else

=== modified file 'sql/field.h'
--- a/sql/field.h	2012-06-25 16:17:24 +0000
+++ b/sql/field.h	2012-09-09 03:33:03 +0000
@@ -36,6 +36,8 @@
 class Create_field;
 class Relay_log_info;
 class Field;
+class Column_statistics;
+class Column_statistics_collected;
 
 enum enum_check_fields
 {
@@ -66,6 +68,8 @@
 /* The length of the header part for each virtual column in the .frm file */
 #define FRM_VCOL_HEADER_SIZE(b) (3 + test(b))
 
+class Count_distinct_field;
+
 struct ha_field_option_struct;
 
 struct st_cache_field;
@@ -216,6 +220,19 @@
    */
   bool is_created_from_null_item;
 
+  bool is_stat_field; /* TRUE in Field objects created for column min/max values */
+
+  /*
+    This structure is used for statistical data on the column
+    that has been read from the statistical table column_stat
+  */ 
+  Column_statistics *read_stats;
+  /*
+    This structure is used for statistical data on the column that
+    is collected by the function collect_statistics_for_table
+  */
+  Column_statistics_collected *collected_stats;
+
   /* 
     This is additional data provided for any computed(virtual) field.
     In particular it includes a pointer to the item by  which this field
@@ -308,6 +325,26 @@
   virtual uint32 data_length() { return pack_length(); }
   virtual uint32 sort_length() const { return pack_length(); }
 
+  /* 
+    Get the number bytes occupied by the value in the field.
+    CHAR values are stripped of trailing spaces.
+    Flexible values are stripped of their length.
+  */
+  virtual uint32 value_length()
+  {
+    uint len;
+    if (!zero_pack() &&
+	(type() == MYSQL_TYPE_STRING &&
+        (len= pack_length()) >= 4 && len < 256))
+    {
+      uchar *str, *end;
+      for (str= ptr, end= str+len; end > str && end[-1] == ' '; end--) {}
+      len=(uint) (end-str); 
+      return len;
+    } 
+    return data_length();
+  }
+
   /**
      Get the maximum size of the data in packed format.
 
@@ -349,6 +386,36 @@
   { return cmp(a, b); }
   virtual int key_cmp(const uchar *str, uint length)
   { return cmp(ptr,str); }
+  /*
+    Update the value m of the 'min_val' field with the current value v
+    of this field if force_update is set to TRUE or if v < m.
+    Return TRUE if the value has been updated.
+  */  
+  virtual bool update_min(Field *min_val, bool force_update)
+  { 
+    bool update_fl= force_update || cmp(ptr, min_val->ptr) < 0;
+    if (update_fl)
+    {
+      min_val->set_notnull();
+      memcpy(min_val->ptr, ptr, pack_length());
+    }
+    return update_fl;
+  }
+  /*
+    Update the value m of the 'max_val' field with the current value v
+    of this field if force_update is set to TRUE or if v > m.
+    Return TRUE if the value has been updated.
+  */  
+  virtual bool update_max(Field *max_val, bool force_update)
+  { 
+    bool update_fl= force_update || cmp(ptr, max_val->ptr) > 0;
+    if (update_fl)
+    {
+      max_val->set_notnull();
+      memcpy(max_val->ptr, ptr, pack_length());
+    }
+    return update_fl;
+  }
   virtual uint decimals() const { return 0; }
   /*
     Caller beware: sql_type can change str.Ptr, so check
@@ -384,6 +451,8 @@
   */
   inline bool real_maybe_null(void) { return null_ptr != 0; }
 
+  inline THD *get_thd() { return table ? table->in_use : current_thd; }
+
   enum {
     LAST_NULL_BYTE_UNDEF= 0
   };
@@ -420,6 +489,9 @@
                                uchar *new_ptr, uchar *new_null_ptr,
                                uint new_null_bit);
   Field *clone(MEM_ROOT *mem_root, TABLE *new_table);
+  Field *clone(MEM_ROOT *mem_root, TABLE *new_table, my_ptrdiff_t diff,
+               bool stat_flag= FALSE);
+  Field *clone(MEM_ROOT *mem_root, my_ptrdiff_t diff);
   inline void move_field(uchar *ptr_arg,uchar *null_ptr_arg,uchar null_bit_arg)
   {
     ptr=ptr_arg; null_ptr=null_ptr_arg; null_bit=null_bit_arg;
@@ -1811,6 +1883,10 @@
   int cmp_binary(const uchar *a,const uchar *b, uint32 max_length=~0L);
   int key_cmp(const uchar *,const uchar*);
   int key_cmp(const uchar *str, uint length);
+  /* Never update the value of min_val for a blob field */
+  bool update_min(Field *min_val, bool force_update) { return FALSE; }
+  /* Never update the value of max_val for a blob field */
+  bool update_max(Field *max_val, bool force_update) { return FALSE; }
   uint32 key_length() const { return 0; }
   void sort_string(uchar *buff,uint length);
   uint32 pack_length() const
@@ -1828,6 +1904,7 @@
   { return (uint32) (packlength); }
   uint row_pack_length() { return pack_length_no_ptr(); }
   uint32 sort_length() const;
+  uint32 value_length() { return get_length(); }
   virtual uint32 max_data_length() const
   {
     return (uint32) (((ulonglong) 1 << (packlength*8)) -1);
@@ -2099,6 +2176,28 @@
   { return cmp_binary((uchar *) a, (uchar *) b); }
   int key_cmp(const uchar *str, uint length);
   int cmp_offset(uint row_offset);
+  bool update_min(Field *min_val, bool force_update)
+  { 
+    longlong val= val_int();
+    bool update_fl= force_update || val < min_val->val_int();
+    if (update_fl)
+    {
+      min_val->set_notnull();
+      min_val->store(val, FALSE);
+    }
+    return update_fl;
+  }
+  bool update_max(Field *max_val, bool force_update)
+  { 
+    longlong val= val_int();
+    bool update_fl= force_update || val > max_val->val_int();
+    if (update_fl)
+    {
+      max_val->set_notnull();
+      max_val->store(val, FALSE);
+    }
+    return update_fl;
+  }
   void get_image(uchar *buff, uint length, CHARSET_INFO *cs)
   { get_key_image(buff, length, itRAW); }   
   void set_image(const uchar *buff,uint length, CHARSET_INFO *cs)

=== modified file 'sql/item_sum.cc'
--- a/sql/item_sum.cc	2012-06-20 11:01:28 +0000
+++ b/sql/item_sum.cc	2012-06-26 18:37:48 +0000
@@ -636,13 +636,24 @@
     @retval > 0       if key1 > key2
 */
 
-static int simple_str_key_cmp(void* arg, uchar* key1, uchar* key2)
+int simple_str_key_cmp(void* arg, uchar* key1, uchar* key2)
 {
   Field *f= (Field*) arg;
   return f->cmp(key1, key2);
 }
 
 
+C_MODE_START
+
+int count_distinct_walk(void *elem, element_count count, void *arg)
+{
+  (*((ulonglong*)arg))++;
+  return 0;
+}
+
+C_MODE_END
+
+
 /**
   Correctly compare composite keys.
  
@@ -710,13 +721,13 @@
 
 /* Declarations for auxilary C-callbacks */
 
-static int simple_raw_key_cmp(void* arg, const void* key1, const void* key2)
+int simple_raw_key_cmp(void* arg, const void* key1, const void* key2)
 {
     return memcmp(key1, key2, *(uint *) arg);
 }
 
 
-static int item_sum_distinct_walk(void *element, element_count num_of_dups,
+int item_sum_distinct_walk(void *element, element_count num_of_dups,
                                   void *item)
 {
   return ((Aggregator_distinct*) (item))->unique_walk_function(element);

=== modified file 'sql/multi_range_read.cc'
--- a/sql/multi_range_read.cc	2012-08-14 16:59:28 +0000
+++ b/sql/multi_range_read.cc	2012-08-30 01:50:38 +0000
@@ -1201,7 +1201,7 @@
   uint parts= my_count_bits(key_tuple_map);
   ulong rpc;
   ulonglong rowids_size= rowid_buf_elem_size;
-  if ((rpc= key_info->rec_per_key[parts - 1]))
+  if ((rpc= key_info->real_rec_per_key(parts - 1)))
     rowids_size= rowid_buf_elem_size * rpc;
 
   double fraction_for_rowids=

=== modified file 'sql/mysqld.cc'
--- a/sql/mysqld.cc	2012-10-18 21:33:06 +0000
+++ b/sql/mysqld.cc	2012-11-03 03:38:05 +0000
@@ -488,6 +488,7 @@
 query_id_t global_query_id;
 my_atomic_rwlock_t global_query_id_lock;
 my_atomic_rwlock_t thread_running_lock;
+my_atomic_rwlock_t statistics_lock;
 ulong aborted_threads, aborted_connects;
 ulong delayed_insert_timeout, delayed_insert_limit, delayed_queue_size;
 ulong delayed_insert_threads, delayed_insert_writes, delayed_rows_in_use;
@@ -1872,6 +1873,7 @@
   sys_var_end();
   my_atomic_rwlock_destroy(&global_query_id_lock);
   my_atomic_rwlock_destroy(&thread_running_lock);
+  my_atomic_rwlock_destroy(&statistics_lock); 
   mysql_mutex_lock(&LOCK_thread_count);
   DBUG_PRINT("quit", ("got thread count lock"));
   ready_to_exit=1;
@@ -6084,6 +6086,7 @@
 */
 
 struct my_option my_long_options[]=
+
 {
   {"help", '?', "Display this help and exit.", 
    &opt_help, &opt_help, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0,
@@ -7308,6 +7311,7 @@
   global_query_id= thread_id= 1L;
   my_atomic_rwlock_init(&global_query_id_lock);
   my_atomic_rwlock_init(&thread_running_lock);
+  my_atomic_rwlock_init(&statistics_lock);
   strmov(server_version, MYSQL_SERVER_VERSION);
   threads.empty();
   thread_cache.empty();

=== modified file 'sql/mysqld.h'
--- a/sql/mysqld.h	2012-10-18 21:33:06 +0000
+++ b/sql/mysqld.h	2012-11-03 03:38:05 +0000
@@ -105,6 +105,7 @@
 extern size_t opt_secure_backup_file_priv_len;
 extern my_bool opt_log_slow_admin_statements, opt_log_slow_slave_statements;
 extern my_bool sp_automatic_privileges, opt_noacl;
+extern ulong use_stat_tables;
 extern my_bool opt_old_style_user_limits, trust_function_creators;
 extern uint opt_crash_binlog_innodb;
 extern char *shared_memory_base_name, *mysqld_unix_port;
@@ -433,6 +434,7 @@
 typedef int64 query_id_t;
 extern query_id_t global_query_id;
 extern my_atomic_rwlock_t global_query_id_lock;
+extern my_atomic_rwlock_t statistics_lock;
 
 void unireg_end(void) __attribute__((noreturn));
 

=== modified file 'sql/opt_range.cc'
--- a/sql/opt_range.cc	2012-10-16 11:04:42 +0000
+++ b/sql/opt_range.cc	2012-11-03 03:38:05 +0000
@@ -2914,7 +2914,7 @@
   DBUG_PRINT("enter",("keys_to_use: %lu  prev_tables: %lu  const_tables: %lu",
 		      (ulong) keys_to_use.to_ulonglong(), (ulong) prev_tables,
 		      (ulong) const_tables));
-  DBUG_PRINT("info", ("records: %lu", (ulong) head->file->stats.records));
+  DBUG_PRINT("info", ("records: %lu", (ulong) head->stat_records()));
   delete quick;
   quick=0;
   needed_reg.clear_all();
@@ -2922,7 +2922,7 @@
   DBUG_ASSERT(!head->is_filled_at_execution());
   if (keys_to_use.is_clear_all() || head->is_filled_at_execution())
     DBUG_RETURN(0);
-  records= head->file->stats.records;
+  records= head->stat_records();
   if (!records)
     records++;					/* purecov: inspected */
   scan_time= (double) records / TIME_FOR_COMPARE + 1;
@@ -3059,7 +3059,7 @@
     if (group_trp)
     {
       param.table->quick_condition_rows= min(group_trp->records,
-                                             head->file->stats.records);
+                                             head->stat_records());
       if (group_trp->read_cost < best_read_time)
       {
         best_trp= group_trp;
@@ -4665,7 +4665,7 @@
   DBUG_PRINT("info", ("index_merge scans cost %g", imerge_cost));
   if (imerge_too_expensive || (imerge_cost > read_time) ||
       ((non_cpk_scan_records+cpk_scan_records >=
-        param->table->file->stats.records) &&
+        param->table->stat_records()) &&
        read_time != DBL_MAX))
   {
     /*
@@ -4736,7 +4736,7 @@
       imerge_trp->read_cost= imerge_cost;
       imerge_trp->records= non_cpk_scan_records + cpk_scan_records;
       imerge_trp->records= min(imerge_trp->records,
-                               param->table->file->stats.records);
+                               param->table->stat_records());
       imerge_trp->range_scans= range_scans;
       imerge_trp->range_scans_end= range_scans + n_child_scans;
       read_time= imerge_cost;
@@ -4807,7 +4807,7 @@
         ((TRP_ROR_INTERSECT*)(*cur_roru_plan))->index_scan_costs;
     roru_total_records += (*cur_roru_plan)->records;
     roru_intersect_part *= (*cur_roru_plan)->records /
-                           param->table->file->stats.records;
+                           param->table->stat_records();
   }
 
   /*
@@ -4817,7 +4817,7 @@
     in disjunction do not share key parts.
   */
   roru_total_records -= (ha_rows)(roru_intersect_part*
-                                  param->table->file->stats.records);
+                                  param->table->stat_records());
   /* ok, got a ROR read plan for each of the disjuncts
     Calculate cost:
     cost(index_union_scan(scan_1, ... scan_n)) =
@@ -5094,12 +5094,12 @@
 ha_rows get_table_cardinality_for_index_intersect(TABLE *table)
 {
   if (table->file->ha_table_flags() & HA_STATS_RECORDS_IS_EXACT)
-    return table->file->stats.records;
+    return table->stat_records();
   else
   {
     ha_rows d;
     double q;
-    for (q= (double)table->file->stats.records, d= 1 ; q >= 10; q/= 10, d*= 10 ) ;
+    for (q= (double)table->stat_records(), d= 1 ; q >= 10; q/= 10, d*= 10 ) ;
     return (ha_rows) (floor(q+0.5) * d);
   } 
 }
@@ -5502,9 +5502,8 @@
     ha_rows ext_records= ext_index_scan->records;
     if (i < used_key_parts)
     {
-      ulong *rec_per_key= key_info->rec_per_key+i-1;
-      ulong f1= rec_per_key[0] ? rec_per_key[0] : 1;
-      ulong f2= rec_per_key[1] ? rec_per_key[1] : 1;
+      ulong f1= key_info->real_rec_per_key(i-1);
+      ulong f2= key_info->real_rec_per_key(i);
       ext_records= (ha_rows) ((double) ext_records / f2 * f1);
     }
     if (ext_records < table_cardinality)
@@ -5996,7 +5995,7 @@
   info->is_covering= FALSE;
   info->index_scan_costs= 0.0;
   info->index_records= 0;
-  info->out_rows= (double) param->table->file->stats.records;
+  info->out_rows= (double) param->table->stat_records();
   bitmap_clear_all(&info->covered_fields);
   return info;
 }
@@ -6122,7 +6121,7 @@
   min_range.flag= HA_READ_KEY_EXACT;
   max_range.key= key_val;
   max_range.flag= HA_READ_AFTER_KEY;
-  ha_rows prev_records= info->param->table->file->stats.records;
+  ha_rows prev_records= info->param->table->stat_records();
   DBUG_ENTER("ror_scan_selectivity");
 
   for (sel_arg= scan->sel_arg; sel_arg;
@@ -6349,7 +6348,7 @@
   double min_cost= DBL_MAX;
   DBUG_ENTER("get_best_ror_intersect");
 
-  if ((tree->n_ror_scans < 2) || !param->table->file->stats.records ||
+  if ((tree->n_ror_scans < 2) || !param->table->stat_records() ||
       !optimizer_flag(param->thd, OPTIMIZER_SWITCH_INDEX_MERGE_INTERSECT))
     DBUG_RETURN(NULL);
 
@@ -12629,14 +12628,14 @@
   double cpu_cost= 0; /* TODO: CPU cost of index_read calls? */
   DBUG_ENTER("cost_group_min_max");
 
-  table_records= table->file->stats.records;
+  table_records= table->stat_records();
   keys_per_block= (table->file->stats.block_size / 2 /
                    (index_info->key_length + table->file->ref_length)
                         + 1);
   num_blocks= (uint)(table_records / keys_per_block) + 1;
 
   /* Compute the number of keys in a group. */
-  keys_per_group= index_info->rec_per_key[group_key_parts - 1];
+  keys_per_group= index_info->real_rec_per_key(group_key_parts - 1);
   if (keys_per_group == 0) /* If there is no statistics try to guess */
     /* each group contains 10% of all records */
     keys_per_group= (uint)(table_records / 10) + 1;
@@ -12656,7 +12655,7 @@
       Compute the probability that two ends of a subgroup are inside
       different blocks.
     */
-    keys_per_subgroup= index_info->rec_per_key[used_key_parts - 1];
+    keys_per_subgroup= index_info->real_rec_per_key(used_key_parts - 1);
     if (keys_per_subgroup >= keys_per_block) /* If a subgroup is bigger than */
       p_overlap= 1.0;       /* a block, it will overlap at least two blocks. */
     else

=== modified file 'sql/sql_admin.cc'
--- a/sql/sql_admin.cc	2012-08-28 16:39:49 +0000
+++ b/sql/sql_admin.cc	2012-09-11 05:22:57 +0000
@@ -27,6 +27,7 @@
 #include "sql_acl.h"                         // *_ACL
 #include "sp.h"                              // Sroutine_hash_entry
 #include "sql_parse.h"                       // check_table_access
+#include "strfunc.h"
 #include "sql_admin.h"
 
 /* Prepare, run and cleanup for mysql_recreate_table() */
@@ -320,7 +321,9 @@
   Protocol *protocol= thd->protocol;
   LEX *lex= thd->lex;
   int result_code;
+  int compl_result_code;
   bool need_repair_or_alter= 0;
+
   DBUG_ENTER("mysql_admin_table");
   DBUG_PRINT("enter", ("extra_open_options: %u", extra_open_options));
 
@@ -640,9 +643,84 @@
       }
     }
 
-    DBUG_PRINT("admin", ("calling operator_func '%s'", operator_name));
-    result_code = (table->table->file->*operator_func)(thd, check_opt);
-    DBUG_PRINT("admin", ("operator_func returned: %d", result_code));
+    result_code= compl_result_code= HA_ADMIN_OK;
+
+    if (operator_func == &handler::ha_analyze)
+    {
+      TABLE *tab= table->table;
+      Field **field_ptr= tab->field;
+
+      if (!lex->column_list)
+      { 
+        uint fields= 0;
+        for ( ; *field_ptr; field_ptr++, fields++) ;         
+        bitmap_set_prefix(tab->read_set, fields);
+      }
+      else
+      {
+        int pos;
+        LEX_STRING *column_name;
+        List_iterator_fast<LEX_STRING> it(*lex->column_list);
+
+        bitmap_clear_all(tab->read_set);
+        while ((column_name= it++))
+	{
+          if (tab->s->fieldnames.type_names == 0 ||
+              (pos= find_type(&tab->s->fieldnames, column_name->str,
+                              column_name->length, 1)) <= 0)
+          {
+            compl_result_code= result_code= HA_ADMIN_INVALID;
+            break;
+          }
+          bitmap_set_bit(tab->read_set, pos-1);
+        } 
+        tab->file->column_bitmaps_signal(); 
+      }
+      
+      if (!lex->index_list)
+      {
+        tab->keys_in_use_for_query.init(tab->s->keys);
+      }
+      else
+      {
+        int pos;
+        LEX_STRING *index_name;
+        List_iterator_fast<LEX_STRING> it(*lex->index_list);
+   
+        tab->keys_in_use_for_query.clear_all();  
+        while ((index_name= it++))
+	{
+          if (tab->s->keynames.type_names == 0 ||
+              (pos= find_type(&tab->s->keynames, index_name->str,
+                              index_name->length, 1)) <= 0)
+          {
+            compl_result_code= result_code= HA_ADMIN_INVALID;
+            break;
+          }
+          tab->keys_in_use_for_query.set_bit(--pos);
+        }  
+      }
+    }
+
+    if (result_code == HA_ADMIN_OK)
+    {    
+      DBUG_PRINT("admin", ("calling operator_func '%s'", operator_name));
+      result_code = (table->table->file->*operator_func)(thd, check_opt);
+      DBUG_PRINT("admin", ("operator_func returned: %d", result_code));
+    }
+
+    if (compl_result_code == HA_ADMIN_OK &&
+        operator_func == &handler::ha_analyze && 
+	thd->variables.use_stat_tables > 0)
+    {
+      if (!(compl_result_code=
+            alloc_statistics_for_table(thd, table->table)) &&
+          !(compl_result_code=
+            collect_statistics_for_table(thd, table->table)))
+        compl_result_code= update_statistics_for_table(thd, table->table);
+      if (compl_result_code)
+        result_code= HA_ADMIN_FAILED;
+    }
 
     if (result_code == HA_ADMIN_NOT_IMPLEMENTED && need_repair_or_alter)
     {

=== modified file 'sql/sql_base.cc'
--- a/sql/sql_base.cc	2012-10-16 11:04:42 +0000
+++ b/sql/sql_base.cc	2012-11-03 03:38:05 +0000
@@ -3142,6 +3142,16 @@
     while (table_cache_count > table_cache_size && unused_tables)
       free_cache_entry(unused_tables);
 
+    if (thd->variables.use_stat_tables > 0)
+    {
+      if (share->table_category != TABLE_CATEGORY_SYSTEM)
+      {
+        if (!share->stats_can_be_read && 
+            !alloc_statistics_for_table_share(thd, share, TRUE))
+	  share->stats_can_be_read= TRUE;
+      }
+    }
+
     mysql_mutex_unlock(&LOCK_open);
 
     /* make a new table */
@@ -4624,6 +4634,29 @@
     goto end;
   }
 
+  if (thd->variables.use_stat_tables > 0 && tables->table)
+  {
+    TABLE_SHARE *table_share= tables->table->s;
+    if (table_share && table_share->table_category != TABLE_CATEGORY_SYSTEM)
+    {
+      if (!table_share->stats_can_be_read && 
+          !alloc_statistics_for_table_share(thd, table_share, FALSE))
+      {    
+        KEY *key_info= table_share->key_info;
+        KEY *key_info_end= key_info + table_share->keys;
+        KEY *table_key_info= tables->table->key_info;
+        for ( ; key_info < key_info_end; key_info++, table_key_info++)
+          table_key_info->read_stats= key_info->read_stats;
+        Field **field_ptr= table_share->field;
+        Field **table_field_ptr= tables->table->field;
+        for ( ; *field_ptr; field_ptr++, table_field_ptr++)
+          (*table_field_ptr)->read_stats= (*field_ptr)->read_stats;
+  
+	table_share->stats_can_be_read= TRUE;
+      }	
+    }
+  }
+
 process_view_routines:
   /*
     Again we may need cache all routines used by this view and add
@@ -5571,6 +5604,8 @@
   if (lock_tables(thd, tables, counter, flags))
     goto err;
 
+  (void) read_statistics_for_tables_if_needed(thd, tables);
+  
   if (derived)
   {
     if (mysql_handle_derived(thd->lex, DT_INIT))
@@ -9605,6 +9640,70 @@
 
 
 /*
+  Unlock opened tables and open and lock system tables for write.
+
+  SYNOPSIS
+    unlock_tables_n_open_system_tables_for_write()
+      thd         Thread context.
+      table_list  List of tables to open.
+      backup      Pointer to Open_tables_state instance where
+                  information about currently open tables will be
+                  saved, and from which will be restored when we will
+                  end work with system tables.
+
+  DESCRIPTION
+    The function first unlocks the opened tables, but do not close them.
+    Then it opens and locks for write the specified system tables.
+  
+  NOTE
+    The system tables cannot be locked for write without unlocking
+    the current opened tables. Yet in some cases we still need valid TABLE
+    structures for these tables to be able to extract data that is to be
+    written into the system tables.
+    This function is used when updating the statistical tables. 
+
+  RETURN
+    FALSE   Success
+    TRUE    Error
+*/
+
+bool
+unlock_tables_n_open_system_tables_for_write(THD *thd,
+                                             TABLE_LIST *table_list,
+                                             Open_tables_backup *backup)
+{
+  Query_tables_list query_tables_list_backup;
+  LEX *lex= thd->lex;
+
+  DBUG_ENTER("unlock_tables_n_open_system_tables_for_write");
+
+  lex->reset_n_backup_query_tables_list(&query_tables_list_backup);
+  thd->reset_n_backup_open_tables_state(backup);
+
+ if (open_and_lock_tables(thd, table_list, FALSE,
+                          MYSQL_OPEN_IGNORE_FLUSH | MYSQL_LOCK_IGNORE_TIMEOUT))
+ {
+    lex->restore_backup_query_tables_list(&query_tables_list_backup);
+    goto error;
+  }
+
+  for (TABLE_LIST *tables= table_list; tables; tables= tables->next_global)
+  {
+    DBUG_ASSERT(tables->table->s->table_category == TABLE_CATEGORY_SYSTEM);
+    tables->table->use_all_columns();
+  }
+  lex->restore_backup_query_tables_list(&query_tables_list_backup);
+
+  DBUG_RETURN(FALSE);
+
+error:
+  close_system_tables(thd, backup);
+
+  DBUG_RETURN(TRUE);
+}
+
+
+/*
   Close system tables, opened with open_system_tables_for_read().
 
   SYNOPSIS

=== modified file 'sql/sql_base.h'
--- a/sql/sql_base.h	2012-05-16 15:44:17 +0000
+++ b/sql/sql_base.h	2012-09-08 19:04:31 +0000
@@ -275,6 +275,9 @@
 /* Functions to work with system tables. */
 bool open_system_tables_for_read(THD *thd, TABLE_LIST *table_list,
                                  Open_tables_backup *backup);
+bool unlock_tables_n_open_system_tables_for_write(THD *thd,
+                                                  TABLE_LIST *table_list,
+                                                  Open_tables_backup *backup);
 void close_system_tables(THD *thd, Open_tables_backup *backup);
 void close_mysql_tables(THD *thd);
 TABLE *open_system_table_for_update(THD *thd, TABLE_LIST *one_table);
@@ -306,6 +309,29 @@
 int update_virtual_fields(THD *thd, TABLE *table, bool ignore_stored= FALSE);
 int dynamic_column_error_message(enum_dyncol_func_result rc);
 
+/* open_and_lock_tables with optional derived handling */
+int open_and_lock_tables_derived(THD *thd, TABLE_LIST *tables, bool derived);
+
+int read_statistics_for_tables_if_needed(THD *thd, TABLE_LIST *tables);
+int collect_statistics_for_table(THD *thd, TABLE *table);
+int alloc_statistics_for_table_share(THD* thd, TABLE_SHARE *share,
+                                     bool is_safe);
+int alloc_statistics_for_table(THD *thd, TABLE *table);
+int update_statistics_for_table(THD *thd, TABLE *table);
+int delete_statistics_for_table(THD *thd, LEX_STRING *db, LEX_STRING *tab);
+int delete_statistics_for_column(THD *thd, TABLE *tab, Field *col);
+int delete_statistics_for_index(THD *thd, TABLE *tab, KEY *key_info);
+int rename_table_in_stat_tables(THD *thd, LEX_STRING *db, LEX_STRING *tab,
+                                LEX_STRING *new_db, LEX_STRING *new_tab);
+int rename_column_in_stat_tables(THD *thd, TABLE *tab, Field *col,
+                                  const char *new_name);
+void set_statistics_for_table(THD *thd, TABLE *table);
+
+extern "C" int simple_raw_key_cmp(void* arg, const void* key1,
+                                  const void* key2);
+extern "C" int count_distinct_walk(void *elem, element_count count, void *arg);
+int simple_str_key_cmp(void* arg, uchar* key1, uchar* key2);
+
 extern TABLE *unused_tables;
 extern Item **not_found_item;
 extern Field *not_found_field;
@@ -472,7 +498,6 @@
   return open_tables(thd, tables, counter, flags, &prelocking_strategy);
 }
 
-
 inline TABLE *open_n_lock_single_table(THD *thd, TABLE_LIST *table_l,
                                        thr_lock_type lock_type, uint flags)
 {

=== modified file 'sql/sql_class.h'
--- a/sql/sql_class.h	2012-10-16 11:04:42 +0000
+++ b/sql/sql_class.h	2012-11-03 03:38:05 +0000
@@ -502,6 +502,7 @@
   ulong net_write_timeout;
   ulong optimizer_prune_level;
   ulong optimizer_search_depth;
+  ulong use_stat_tables;
   ulong preload_buff_size;
   ulong profiling_history_size;
   ulong read_buff_size;

=== modified file 'sql/sql_db.cc'
--- a/sql/sql_db.cc	2012-08-24 13:29:01 +0000
+++ b/sql/sql_db.cc	2012-08-30 01:50:38 +0000
@@ -816,6 +816,17 @@
       lock_db_routines(thd, db))
     goto exit;
 
+  if (!in_bootstrap)
+  {
+    for (table= tables; table; table= table->next_local)
+    {
+      LEX_STRING db_name= { table->db, table->db_length };
+      LEX_STRING table_name= { table->table_name, table->table_name_length };
+      if (table->open_type == OT_BASE_ONLY || !find_temporary_table(thd, table))
+        (void) delete_statistics_for_table(thd, &db_name, &table_name);
+    }
+  }
+
   /* mysql_ha_rm_tables() requires a non-null TABLE_LIST. */
   if (tables)
     mysql_ha_rm_tables(thd, tables);

=== modified file 'sql/sql_delete.cc'
--- a/sql/sql_delete.cc	2012-08-09 15:22:00 +0000
+++ b/sql/sql_delete.cc	2012-08-14 19:42:14 +0000
@@ -200,6 +200,7 @@
 #endif
   /* Update the table->file->stats.records number */
   table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
+  set_statistics_for_table(thd, table);
 
   table->covering_keys.clear_all();
   table->quick_keys.clear_all();		// Can't use 'only index'

=== modified file 'sql/sql_join_cache.cc'
--- a/sql/sql_join_cache.cc	2012-10-18 21:33:06 +0000
+++ b/sql/sql_join_cache.cc	2012-11-03 03:38:05 +0000
@@ -3812,7 +3812,7 @@
   uint incr= 0;
   TABLE_REF *ref= &join_tab->ref;
   TABLE *tab= join_tab->table;
-  uint rec_per_key= tab->key_info[ref->key].rec_per_key[ref->key_parts-1];
+  uint rec_per_key= tab->key_info[ref->key].real_rec_per_key(ref->key_parts-1);
   set_if_bigger(rec_per_key, 1);
   if (recno == 1)
     incr=  ref->key_length + tab->file->ref_length;

=== modified file 'sql/sql_lex.cc'
--- a/sql/sql_lex.cc	2012-08-27 16:13:17 +0000
+++ b/sql/sql_lex.cc	2012-08-30 01:50:38 +0000
@@ -458,6 +458,8 @@
   lex->set_var_list.empty();
   lex->param_list.empty();
   lex->view_list.empty();
+  lex->column_list= NULL;
+  lex->index_list= NULL;
   lex->prepared_stmt_params.empty();
   lex->auxiliary_table_list.empty();
   lex->unit.next= lex->unit.master=

=== modified file 'sql/sql_lex.h'
--- a/sql/sql_lex.h	2012-08-27 16:13:17 +0000
+++ b/sql/sql_lex.h	2012-08-30 01:50:38 +0000
@@ -2391,6 +2391,8 @@
   List<Item_func_set_user_var> set_var_list; // in-query assignment list
   List<Item_param>    param_list;
   List<LEX_STRING>    view_list; // view list (list of field names in view)
+  List<LEX_STRING>   *column_list; // list of column names (in ANALYZE)
+  List<LEX_STRING>   *index_list;  // list of index names (in ANALYZE)
   /*
     A stack of name resolution contexts for the query. This stack is used
     at parse time to set local name resolution contexts for various parts

=== modified file 'sql/sql_priv.h'
--- a/sql/sql_priv.h	2012-10-18 21:33:06 +0000
+++ b/sql/sql_priv.h	2012-11-03 03:38:05 +0000
@@ -327,6 +327,7 @@
 };
 
 #ifdef MYSQL_SERVER
+
 /*
   External variables
 */

=== modified file 'sql/sql_rename.cc'
--- a/sql/sql_rename.cc	2012-01-13 14:50:02 +0000
+++ b/sql/sql_rename.cc	2012-07-10 23:34:39 +0000
@@ -279,6 +279,12 @@
                                      ren_table->db, old_alias,
                                      new_db, new_alias, 0)))
         {
+          LEX_STRING db_name= { ren_table->db, ren_table->db_length };
+          LEX_STRING table_name= { ren_table->table_name,
+                                   ren_table->table_name_length };
+          LEX_STRING new_table= { (char *) new_alias, strlen(new_alias) };
+          (void) rename_table_in_stat_tables(thd, &db_name, &table_name,
+                                             &db_name, &new_table);
           if ((rc= Table_triggers_list::change_table_name(thd, ren_table->db,
                                                           old_alias,
                                                           ren_table->table_name,

=== modified file 'sql/sql_select.cc'
--- a/sql/sql_select.cc	2012-10-18 21:33:06 +0000
+++ b/sql/sql_select.cc	2012-11-03 03:38:05 +0000
@@ -51,6 +51,7 @@
 #include "opt_subselect.h"
 #include "log_slow.h"
 #include "sql_derived.h"
+#include "sql_statistics.h"
 
 #include "debug_sync.h"          // DEBUG_SYNC
 #include <m_ctype.h>
@@ -3182,6 +3183,7 @@
     table_vector[i]=s->table=table=tables->table;
     table->pos_in_table_list= tables;
     error= tables->fetch_number_of_rows();
+    set_statistics_for_table(join->thd, table);
 
 #ifdef WITH_PARTITION_STORAGE_ENGINE
     const bool no_partitions_used= table->no_partitions_used;
@@ -3213,8 +3215,8 @@
 
     s->dependent= tables->dep_tables;
     if (tables->schema_table)
-      table->file->stats.records= 2;
-    table->quick_condition_rows= table->file->stats.records;
+      table->file->stats.records= table->used_stat_records= 2;
+    table->quick_condition_rows= table->stat_records();
 
     s->on_expr_ref= &tables->on_expr;
     if (*s->on_expr_ref)
@@ -3447,7 +3449,7 @@
 	// All dep. must be constants
 	if (s->dependent & ~(found_const_table_map))
 	  continue;
-	if (table->file->stats.records <= 1L &&
+	if (table->stat_records() <= 1L &&
 	    (table->file->ha_table_flags() & HA_STATS_RECORDS_IS_EXACT) &&
             !table->pos_in_table_list->embedding &&
 	      !((outer_join & table->map) && 
@@ -5415,7 +5417,7 @@
             else
             {
               uint key_parts= table->actual_n_key_parts(keyinfo);
-              if (!(records=keyinfo->rec_per_key[key_parts-1]))
+              if (!(records= keyinfo->real_rec_per_key(key_parts-1)))
               {                                   /* Prefer longer keys */
                 records=
                   ((double) s->records / (double) rec *
@@ -5515,7 +5517,7 @@
             else
             {
               /* Check if we have statistic about the distribution */
-              if ((records= keyinfo->rec_per_key[max_key_part-1]))
+              if ((records= keyinfo->real_rec_per_key(max_key_part-1)))
               {
                 /* 
                   Fix for the case where the index statistics is too
@@ -7730,6 +7732,7 @@
   keyinfo->key_length=0;
   keyinfo->algorithm= HA_KEY_ALG_UNDEF;
   keyinfo->flags= HA_GENERATED_KEY;
+  keyinfo->is_statistics_from_stat_tables= FALSE;
   keyinfo->name= (char *) "$hj";
   keyinfo->rec_per_key= (ulong*) thd->calloc(sizeof(ulong)*key_parts);
   if (!keyinfo->rec_per_key)
@@ -10290,7 +10293,7 @@
     }
     else
     {
-      found_records= records= table->file->stats.records;
+      found_records= records= table->stat_records();
       read_time= table->file->scan_time();
       /*
         table->quick_condition_rows has already been set to
@@ -10301,7 +10304,7 @@
   }
   else
   {
-    found_records= records=table->file->stats.records;
+    found_records= records=table->stat_records();
     read_time= found_records ? (double)found_records: 10.0;// TODO:fix this stub
     res= read_time;
   }
@@ -10342,7 +10345,7 @@
           handler->info(HA_STATUS_VARIABLE) has been called in
           make_join_statistics()
         */
-        examined_rows= table->file->stats.records;
+        examined_rows= table->stat_records();
       }
     }
   }
@@ -14684,8 +14687,11 @@
     keyinfo->usable_key_parts=keyinfo->key_parts= param->group_parts;
     keyinfo->ext_key_parts= keyinfo->key_parts;
     keyinfo->key_length=0;
-    keyinfo->rec_per_key=0;
+    keyinfo->rec_per_key=NULL;
+    keyinfo->read_stats= NULL;
+    keyinfo->collected_stats= NULL;
     keyinfo->algorithm= HA_KEY_ALG_UNDEF;
+    keyinfo->is_statistics_from_stat_tables= FALSE;
     keyinfo->name= (char*) "group_key";
     ORDER *cur_group= group;
     for (; cur_group ; cur_group= cur_group->next, key_part_info++)
@@ -14798,7 +14804,10 @@
     keyinfo->key_length= 0;  // Will compute the sum of the parts below.
     keyinfo->name= (char*) "distinct_key";
     keyinfo->algorithm= HA_KEY_ALG_UNDEF;
+    keyinfo->is_statistics_from_stat_tables= FALSE;
     keyinfo->rec_per_key=0;
+    keyinfo->read_stats= NULL;
+    keyinfo->collected_stats= NULL;
 
     /*
       Create an extra field to hold NULL bits so that unique indexes on
@@ -18576,7 +18585,7 @@
     uint saved_best_key_parts= 0;
     int best_key_direction= 0;
     JOIN *join= tab->join;
-    ha_rows table_records= table->file->stats.records;
+    ha_rows table_records= table->stat_records();
 
     test_if_cheaper_ordering(tab, order, table, usable_keys,
                              ref_key, select_limit,
@@ -18691,7 +18700,7 @@
         {
           tab->ref.key= -1;
           tab->ref.key_parts= 0;
-          if (select_limit < table->file->stats.records)
+          if (select_limit < table->stat_records())
             tab->limit= select_limit;
           table->disable_keyread();
         }
@@ -18931,7 +18940,7 @@
   if (!tab->preread_init_done && tab->preread_init())
     goto err;
   if (table->s->tmp_table)
-    table->file->info(HA_STATUS_VARIABLE);	// Get record count
+    table->file->info(HA_STATUS_VARIABLE);     // Get record count
   table->sort.found_records=filesort(thd, table,join->sortorder, length,
                                      select, filesort_limit, 0,
                                      &examined_rows);
@@ -22700,7 +22709,7 @@
   int best_key= -1;
   bool is_best_covering= FALSE;
   double fanout= 1;
-  ha_rows table_records= table->file->stats.records;
+  ha_rows table_records= table->stat_records();
   bool group= join && join->group && order == join->group_list;
   ha_rows ref_key_quick_rows= HA_POS_ERROR;
 
@@ -22790,7 +22799,7 @@
           if (used_key_parts > used_index_parts)
             used_pk_parts= used_key_parts-used_index_parts;
           rec_per_key= used_key_parts ?
-                       keyinfo->rec_per_key[used_key_parts-1] : 1;
+	               keyinfo->real_rec_per_key(used_key_parts-1) : 1;
           /* Take into account the selectivity of the used pk prefix */
           if (used_pk_parts)
 	  {
@@ -22805,8 +22814,8 @@
               rec_per_key= 1;                 
             if (rec_per_key > 1)
 	    {
-              rec_per_key*= pkinfo->rec_per_key[used_pk_parts-1];
-              rec_per_key/= pkinfo->rec_per_key[0];
+              rec_per_key*= pkinfo->real_rec_per_key(used_pk_parts-1);
+              rec_per_key/= pkinfo->real_rec_per_key(0);
               /* 
                 The value of rec_per_key for the extended key has
                 to be adjusted accordingly if some components of
@@ -22820,9 +22829,9 @@
                     We presume here that for any index rec_per_key[i] != 0
                     if rec_per_key[0] != 0.
 	          */
-                  DBUG_ASSERT(pkinfo->rec_per_key[i]);
-                  rec_per_key*= pkinfo->rec_per_key[i-1];
-                  rec_per_key/= pkinfo->rec_per_key[i];
+                  DBUG_ASSERT(pkinfo->real_rec_per_key(i));
+                  rec_per_key*= pkinfo->real_rec_per_key(i-1);
+                  rec_per_key/= pkinfo->real_rec_per_key(i);
                 }
 	      }
             }    
@@ -22867,7 +22876,7 @@
           select_limit= (ha_rows) (select_limit *
                                    (double) table_records /
                                     table->quick_condition_rows);
-        rec_per_key= keyinfo->rec_per_key[keyinfo->key_parts-1];
+        rec_per_key= keyinfo->real_rec_per_key(keyinfo->key_parts-1);
         set_if_bigger(rec_per_key, 1);
         /*
           Here we take into account the fact that rows are
@@ -23008,7 +23017,7 @@
       Update quick_condition_rows since single table UPDATE/DELETE procedures
       don't call make_join_statistics() and leave this variable uninitialized.
     */
-    table->quick_condition_rows= table->file->stats.records;
+    table->quick_condition_rows= table->stat_records();
     
     int key, direction;
     if (test_if_cheaper_ordering(NULL, order, table,

=== modified file 'sql/sql_show.cc'
--- a/sql/sql_show.cc	2012-10-18 21:33:06 +0000
+++ b/sql/sql_show.cc	2012-11-03 03:38:05 +0000
@@ -5727,9 +5727,12 @@
     TABLE *show_table= tables->table;
     KEY *key_info=show_table->s->key_info;
     if (show_table->file)
+    {
       show_table->file->info(HA_STATUS_VARIABLE |
                              HA_STATUS_NO_LOCK |
                              HA_STATUS_TIME);
+      set_statistics_for_table(thd, show_table);
+    }
     for (uint i=0 ; i < show_table->s->keys ; i++,key_info++)
     {
       KEY_PART_INFO *key_part= key_info->key_part;
@@ -5760,8 +5763,8 @@
           KEY *key=show_table->key_info+i;
           if (key->rec_per_key[j])
           {
-            ha_rows records=(show_table->file->stats.records /
-                             key->rec_per_key[j]);
+            ha_rows records=((double) show_table->stat_records() /
+                             key->real_rec_per_key(j));
             table->field[9]->store((longlong) records, TRUE);
             table->field[9]->set_notnull();
           }

=== added file 'sql/sql_statistics.cc'
--- a/sql/sql_statistics.cc	1970-01-01 00:00:00 +0000
+++ b/sql/sql_statistics.cc	2012-09-12 05:36:04 +0000
@@ -0,0 +1,2925 @@
+/* Copyright (C) 2009 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/**
+  @file
+
+  @brief
+  functions to update persitent statistical tables and to read from them
+
+  @defgroup Query_Optimizer  Query Optimizer
+  @{
+*/
+
+#include "sql_base.h"
+#include "key.h"
+#include "sql_statistics.h"
+#include "my_atomic.h"
+
+/*
+  The system variable 'use_stat_tables' can take one of the
+  following values:
+  "never", "complementary", "preferably". 
+  If the values of the variable 'use_stat_tables' is set to
+  "never then any statistical data from  the persistent statistical tables
+  is ignored by the optimizer.
+  If the value of the variable 'use_stat_tables' is set to
+  "complementary" then a particular statistical characteristic is used
+  by the optimizer only if the database engine does not provide similar
+  statistics. For example, 'nulls_ratio' for table columns  currently 
+  are not provided by any engine. So optimizer uses this statistical data
+  from the  statistical tables. At the same time it does not use 
+  'avg_frequency' for any index prefix from the statistical tables since
+  the a similar statistical characteristic 'records_per_key' can be
+  requested from the database engine.
+  If the value the variable 'use_stat_tables' is set to
+  "preferably" the optimizer uses a particular statistical data only if
+  it can't be found in the statistical data.
+  If an ANALYZE command is executed then it results in collecting
+  statistical data for the tables specified by the command and storing
+  the collected statistics in the persistent statistical tables only
+  when the value of the variable 'use_stat_tables' is not
+  equal to "never".
+*/ 
+   
+/* Currently there are only 3 persistent statistical tables */
+static const uint STATISTICS_TABLES= 3;
+
+/* 
+  The names of the statistical tables in this array must correspond the
+  definitions of the tables in the file ../scripts/mysql_system_tables.sql
+*/
+static const LEX_STRING stat_table_name[STATISTICS_TABLES]=
+{
+  { C_STRING_WITH_LEN("table_stat") },
+  { C_STRING_WITH_LEN("column_stat") },
+  { C_STRING_WITH_LEN("index_stat") }
+};
+
+/* Name of database to which the statistical tables belong */
+static const LEX_STRING stat_tables_db_name= { C_STRING_WITH_LEN("mysql") };
+
+
+/**
+  @details
+  The function builds a list of TABLE_LIST elements for system statistical
+  tables using array of TABLE_LIST passed as a parameter. 
+  The lock type of each element is set to TL_READ if for_write = FALSE,
+  otherwise it is set to TL_WRITE.
+*/
+
+static
+inline void init_table_list_for_stat_tables(TABLE_LIST *tables, bool for_write)
+{
+  uint i;
+
+  memset((char *) &tables[0], 0, sizeof(TABLE_LIST) * STATISTICS_TABLES);
+
+  for (i= 0; i < STATISTICS_TABLES; i++)
+  {
+    tables[i].db= stat_tables_db_name.str;
+    tables[i].db_length= stat_tables_db_name.length;
+    tables[i].alias= tables[i].table_name= stat_table_name[i].str;
+    tables[i].table_name_length= stat_table_name[i].length;
+    tables[i].lock_type= for_write ? TL_WRITE : TL_READ;
+    if (i < STATISTICS_TABLES - 1)
+    tables[i].next_global= tables[i].next_local=
+      tables[i].next_name_resolution_table= &tables[i+1];
+    if (i != 0)
+      tables[i].prev_global= &tables[i-1].next_global;
+  }
+}
+
+
+/**
+  @details
+  The function builds a TABLE_LIST containing only one element 'tbl' for
+  the statistical table called 'stat_tab_name'. 
+  The lock type of the element is set to TL_READ if for_write = FALSE,
+  otherwise it is set to TL_WRITE.
+*/
+
+static
+inline void init_table_list_for_single_stat_table(TABLE_LIST *tbl,
+                                                  const LEX_STRING *stat_tab_name, 
+                                                  bool for_write)
+{
+  memset((char *) tbl, 0, sizeof(TABLE_LIST));
+
+  tbl->db= stat_tables_db_name.str;
+  tbl->db_length= stat_tables_db_name.length;
+  tbl->alias= tbl->table_name= stat_tab_name->str;
+  tbl->table_name_length= stat_tab_name->length;
+  tbl->lock_type= for_write ? TL_WRITE : TL_READ;
+}
+
+
+/**
+  @details
+  If the value of the parameter is_safe is TRUE then the function
+  just copies the address pointed by the parameter src into the memory
+  pointed by the parameter dest. Otherwise the function performs the
+  following statement as an atomic action:
+     if (*dest == NULL) { *dest= *src; }
+  i.e. the same copying is performed only if *dest is NULL.
+*/  
+
+static
+inline void store_address_if_first(void **dest, void **src, bool is_safe)
+{
+  if (is_safe)
+  {
+    if (!*dest)
+      memcpy(dest, src, sizeof(void *));
+  }
+  else
+  {
+    char *null= NULL;
+    my_atomic_rwlock_wrlock(&statistics_lock);
+    my_atomic_casptr(dest, (void **) &null, *src) 
+    my_atomic_rwlock_wrunlock(&statistics_lock);
+  }
+}
+
+
+/*
+  The class Column_statistics_collected is a helper class used to collect
+  statistics on a table column. The class is derived directly from
+  the class Column_statistics, and, additionally to the fields of the
+  latter, it contains the fields to accumulate the results of aggregation
+  for the number of nulls in the column and for the size of the column
+  values. There is also a container for distinct column values used
+  to calculate the average number of records per distinct column value. 
+*/ 
+
+class Column_statistics_collected :public Column_statistics
+{
+
+private:
+  Field *column;  /* The column to collect statistics on */
+  ha_rows nulls;  /* To accumulate the number of nulls in the column */ 
+  ulonglong column_total_length; /* To accumulate the size of column values */
+  Count_distinct_field *count_distinct; /* The container for distinct 
+                                           column values */
+
+public:
+
+  inline void init(THD *thd, Field * table_field);
+  inline void add(ha_rows rowno);
+  inline void finish(ha_rows rows); 
+  inline void cleanup();
+};
+
+
+/**
+  Stat_table is the base class for classes Table_stat, Column_stat and
+  Index_stat. The methods of these classes allow us to read statistical
+  data from statistical tables, write collected statistical data into
+  statistical tables and update statistical data in these  tables
+  as well as update access fields belonging to the primary key and
+  delete records by prefixes of the primary key.
+  Objects of the classes Table_stat, Column_stat  and Index stat are used 
+  for reading/writing statistics from/into persistent tables table_stat,
+  column_stat and index_stat correspondingly.  These tables are stored in
+  the system database 'mysql'.
+
+  Statistics is read and written always for a given database table t. When
+  an  object of any of these classes is created a pointer to the TABLE
+  structure for this database table is passed as a parameter to the constructor
+  of the object. The other parameter is a pointer to the TABLE structure for
+  the corresponding statistical table st. So construction of an object to 
+  read/write statistical data on table t from/into statistical table st 
+  requires both table t and st to be opened.
+  In some cases the TABLE structure for table t may be undefined. Then
+  the objects of the classes Table_stat, Column_stat  and Index stat are
+  created by the alternative constructor that require only the name
+  of the table t and the name of the database it belongs to. Currently the
+  alternative constructors are used only in the cases when some records
+  belonging to the table are to be deleted, or its keys are to be updated   
+
+  Reading/writing statistical data from/into a statistical table is always
+  performed by a key.  At the moment there is only one key defined for each
+  statistical table and this key is primary.
+  The primary key for the table table_stat is built as (db_name, table_name).
+  The primary key for the table column_stat is built as (db_name, table_name,
+  column_name).
+  The primary key for the table index_stat is built as (db_name, table_name,
+  index_name, prefix_arity).
+
+  Reading statistical data from a statistical table is performed by the 
+  following pattern. First a table dependent method sets the values of the
+  the fields that comprise the lookup key. Then an implementation of the 
+  method get_stat_values() declared in Stat_table as a pure virtual method
+  finds the row from the statistical table by the set key. If the row is
+  found the values of statistical fields are read from this row and are
+  distributed in the internal structures.
+
+  Let's assume the statistical data is read for table t from database db.
+
+  When statistical data is searched in the table table_stat first 
+  Table_stat::set_key_fields() should set the fields of db_name and
+  table_name. Then get_stat_values looks for a row by the set key value,
+  and, if the row is found, reads the value from the column
+  table_stat.cardinality into the field read_stat.cardinality of the TABLE
+  structure for table t and sets the value of read_stat.cardinality_is_null
+  from this structure to FALSE. If the value of the 'cardinality' column
+  in the row is null or if no row is found read_stat.cardinality_is_null
+  is set to TRUE.
+
+  When statistical data is searched in the table column_stat first
+  Column_stat::set_key_fields() should set the fields of db_name, table_name
+  and column_name with column_name taken out of the only parameter f of the
+  Field* type passed to this method. After this get_stat_values looks
+  for a row by the set key value. If the row is found the values of statistical 
+  data columns min_value, max_value, nulls_ratio, avg_length, avg_frequency
+  are read into internal structures. Values of nulls_ratio, avg_length,
+  avg_frequency are read into the corresponding fields of the read_stat
+  structure from the Field object f, while values from min_value and max_value
+  are copied into the min_value and  max_value record buffers attached to the
+  TABLE structure for table t.
+  If the value of a statistical column in the found row is null, then the
+  corresponding flag in the f->read_stat.column_stat_nulls bitmap is set off.
+  Otherwise the flag is set on. If no row is found for the column the all flags
+  in f->column_stat_nulls are set off.
+  
+  When statistical data is searched in the table index_stat first
+  Index_stat::set_key_fields() has to be called to set the fields of db_name,
+  table_name, index_name and prefix_arity. The value of index_name is extracted
+  from the first parameter key_info of the KEY* type passed to the method.
+  This parameter  specifies the index of interest idx. The second parameter
+  passed to the method specifies the arity k of the index prefix for which
+  statistical data is to be read. E.g. if the index idx consists of 3
+  components (p1,p2,p3) the table  index_stat usually will contain 3 rows for
+  this index: the first - for the prefix (p1), the second - for the prefix
+  (p1,p2), and the third - for the the prefix (p1,p2,p3). After the key fields
+  has been set a call of get_stat_value looks for a row by the set key value.
+  If the row is found and the value of the avg_frequency column is not null 
+  then this value is assigned to key_info->read_stat.avg_frequency[k].
+  Otherwise 0 is assigned to this element. 
+
+  The method Stat_table::update_stat is used to write statistical data
+  collected in the internal structures into a statistical table st.
+  It is assumed that before any invocation of this method a call of the
+  function st.set_key_fields has set the values of the primary key fields
+  that serve to locate the row from the statistical table st where the 
+  the collected statistical data from internal structures are to be written
+  to. The statistical data is written from the counterparts of the
+  statistical fields of internal structures into which it would be read
+  by the functions get_stat_values. The counterpart fields are used
+  only when statistics is collected
+  When updating/inserting a row from the statistical table st the method
+  Stat_table::update_stat calls the implementation of the pure virtual
+  method store_field_values to transfer statistical data from the fields
+  of internal structures to the fields of record buffer used for updates
+  of the statistical table st.     
+*/  
+         
+class Stat_table 
+{
+
+private:
+
+  /* Handler used for the retrieval of the statistical table stat_table */
+  handler *stat_file;
+  
+  uint stat_key_length; /* Length of the key to access stat_table */
+  uchar *record[2];     /* Record buffers used to access/update stat_table */
+  uint stat_key_idx;    /* The number of the key to access stat_table */
+
+  /* This is a helper function used only by the Stat_table constructors */
+  void common_init_stat_table()
+  {
+    stat_file= stat_table->file;
+    /* Currently any statistical table has only one key */
+    stat_key_idx= 0;
+    stat_key_info= &stat_table->key_info[stat_key_idx];
+    stat_key_length= stat_key_info->key_length;
+    record[0]= stat_table->record[0];
+    record[1]= stat_table->record[1];
+  }
+
+protected:
+
+  /* Statistical table to read statistics from or to update/delete */
+  TABLE *stat_table;
+  KEY *stat_key_info;   /* Structure for the index to access stat_table */
+  
+  /* Table for which statistical data is read / updated */
+  TABLE *table;
+  TABLE_SHARE *table_share; /* Table share for 'table */    
+  LEX_STRING *db_name;      /* Name of the database containing 'table' */ 
+  LEX_STRING *table_name;   /* Name of the table 'table' */
+
+  void store_record_for_update()
+  {
+    store_record(stat_table, record[1]);
+  }
+
+  void store_record_for_lookup()
+  {
+    store_record(stat_table, record[0]);
+  }
+
+  bool update_record()
+  {
+    int err;
+    if ((err= stat_file->ha_update_row(record[1], record[0])) &&
+         err != HA_ERR_RECORD_IS_THE_SAME)
+      return TRUE;
+    return FALSE;
+  }
+
+public:
+
+
+  /**
+    @details
+    This constructor has to be called by any constructor of the derived
+    classes. The constructor 'tunes' the private and protected members of
+    the constructed object to the statistical table 'stat_table' with the
+    statistical data of our interest and to the table 'tab' for which this
+    statistics has been collected.
+  */  
+
+  Stat_table(TABLE *stat, TABLE *tab) 
+    :stat_table(stat), table(tab)
+  {
+    table_share= tab->s;
+    common_init_stat_table();
+    db_name= &table_share->db;
+    table_name= &table_share->table_name;
+  }
+
+
+  /**
+    @details
+    This constructor has to be called by any constructor of the derived
+    classes. The constructor 'tunes' the private and protected members of
+    the constructed object to the statistical table 'stat_table' with the
+    statistical data of our interest and to the table t for which this
+    statistics has been collected. The table t is uniquely specified
+    by the database name 'db' and the table name 'tab'.
+  */  
+  
+  Stat_table(TABLE *stat, LEX_STRING *db, LEX_STRING *tab)
+    :stat_table(stat), table_share(NULL)
+  {
+    common_init_stat_table();
+    db_name= db;
+    table_name= tab;
+  } 
+
+
+  virtual ~Stat_table() {}
+
+  /**
+    @brief
+    Store the given values of fields for database name and table name 
+   
+    @details
+    This is a purely virtual method.
+    The implementation for any derived class shall store the given
+    values of the database name and table name in the corresponding
+    fields of stat_table.
+    
+    @note
+    The method is called by the update_table_name_key_parts function.
+  */      
+
+ virtual void change_full_table_name(LEX_STRING *db, LEX_STRING *tab)= 0;
+
+ 
+  /**
+    @brief
+    Store statistical data into fields of the statistical table
+   
+    @details
+    This is a purely virtual method.
+    The implementation for any derived class shall put the appropriate
+    statistical data into the corresponding fields of stat_table.
+    
+    @note
+    The method is called by the update_stat function.
+  */      
+
+  virtual void store_stat_fields()= 0;
+
+  
+  /**
+    @brief
+    Read statistical data from fields of the statistical table
+   
+    @details
+    This is a purely virtual method.
+    The implementation for any derived read shall read the appropriate
+    statistical data from the corresponding fields of stat_table.    
+  */      
+  
+  virtual void get_stat_values()= 0;
+
+
+  /**
+    @brief
+    Find a record in the statistical table by a primary key
+
+    @details
+    The function looks for a record in stat_table by its primary key.
+    It assumes that the key fields have been already stored in the record
+    buffer of stat_table.
+
+    @retval
+    FALSE    the record is not found
+    @retval
+    TRUE     the record is found
+  */
+
+  bool find_stat()
+  {
+    uchar key[MAX_KEY_LENGTH];
+    key_copy(key, record[0], stat_key_info, stat_key_length);
+    return !stat_file->ha_index_read_idx_map(record[0], stat_key_idx, key,
+                                             HA_WHOLE_KEY, HA_READ_KEY_EXACT);
+  }
+
+ 
+  /**
+    @brief
+    Find a record in the statistical table by a key prefix value 
+
+    @details
+    The function looks for a record in stat_table by the key value consisting
+    of 'prefix_parts' major components for the primary index.  
+    It assumes that the key prefix fields have been already stored in the record
+    buffer of stat_table.
+
+    @retval
+    FALSE    the record is not found
+    @retval
+    TRUE     the record is found
+  */
+
+  bool find_next_stat_for_prefix(uint prefix_parts)
+  {
+    uchar key[MAX_KEY_LENGTH];
+    uint prefix_key_length= 0;
+    for (uint i= 0; i < prefix_parts; i++)
+      prefix_key_length+= stat_key_info->key_part[i].store_length;
+    key_copy(key, record[0], stat_key_info, prefix_key_length);
+    key_part_map prefix_map= (key_part_map) ((1 << prefix_parts) - 1);
+    return !stat_file->ha_index_read_idx_map(record[0], stat_key_idx, key,
+                                             prefix_map, HA_READ_KEY_EXACT);
+  }
+   
+
+  /**
+    @brief
+    Update/insert a record in the statistical table with new statistics
+
+    @details
+    The function first looks for a record by its primary key in the statistical
+    table stat_table. If the record is found the function updates statistical
+    fields of the records. The data for these fields are taken from internal
+    structures containing info on the table 'table'. If the record is not
+    found the function inserts a new record with the primary key set to the
+    search key and the statistical data taken from the internal structures.
+    The function assumes that the key fields have been already stored in
+    the record buffer of stat_table.
+
+    @retval
+    FALSE    success with the update/insert of the record
+    @retval
+    TRUE     failure with the update/insert of the record
+
+    @note
+    The function calls the virtual method store_stat_fields to populate the
+    statistical fields of the updated/inserted row with new statistics.
+  */
+
+  bool update_stat()
+  {
+    if (find_stat())
+    {    
+      store_record_for_update();
+      store_stat_fields();
+      return update_record();
+    }
+    else
+    {
+      int err;
+      store_stat_fields();
+      if ((err= stat_file->ha_write_row(record[0])))
+	return TRUE;
+    } 
+    return FALSE;
+  }
+
+
+  /** 
+    @brief
+    Update the table name fields in the current record of stat_table
+
+    @details
+    The function updates the fields containing database name and table name
+    for the last found record in the statistical table stat_table.
+    The corresponding names for update is taken from the parameters
+    db and tab.
+ 
+    @retval
+    FALSE    success with the update of the record
+    @retval
+    TRUE     failure with the update of the record
+
+    @note
+    The function calls the virtual method change_full_table_name  
+    to store the new names in the record buffer used for updates.
+  */
+
+  bool update_table_name_key_parts(LEX_STRING *db, LEX_STRING *tab)
+  {
+    store_record_for_update();
+    change_full_table_name(db, tab);
+    bool rc= update_record();
+    store_record_for_lookup();
+    return rc;
+  }   
+
+
+  /** 
+    @brief
+    Delete the current record of the statistical table stat_table
+
+    @details
+    The function deletes the last found record from the statistical
+    table stat_table.
+ 
+    @retval
+    FALSE    success with the deletion of the record
+    @retval
+    TRUE     failure with the deletion of the record
+  */
+
+  bool delete_stat()
+  {
+    int err;
+    if ((err= stat_file->ha_delete_row(record[0])))
+      return TRUE;
+    return FALSE;
+  } 
+};
+
+
+/*
+  An object of the class Table_stat is created to read statistical
+  data on tables from the statistical table table_stat, to update
+  table_stat with such statistical data, or to update columns
+  of the primary key, or to delete the record by its primary key or
+  its prefix. 
+  Rows from the statistical table are read and updated always by
+  primary key. 
+*/
+
+class Table_stat: public Stat_table
+{
+
+private:
+
+  Field *db_name_field;     /* Field for the column table_stat.db_name */
+  Field *table_name_field;  /* Field for the column table_stat.table_name */
+
+  void common_init_table_stat()
+  {  
+    db_name_field= stat_table->field[TABLE_STAT_DB_NAME];
+    table_name_field= stat_table->field[TABLE_STAT_TABLE_NAME];
+  }
+
+  void change_full_table_name(LEX_STRING *db, LEX_STRING *tab)
+  {
+    db_name_field->store(db->str, db->length, system_charset_info);
+    table_name_field->store(tab->str, tab->length, system_charset_info);
+  }
+
+public:
+
+  /**
+    @details
+    The constructor 'tunes' the private and protected members of the
+    constructed object for the statistical table table_stat to read/update
+    statistics on table 'tab'. The TABLE structure for the table table_stat
+    must be passed as a value for the parameter 'stat'.
+  */
+
+  Table_stat(TABLE *stat, TABLE *tab) :Stat_table(stat, tab)
+  {
+    common_init_table_stat();
+  }
+
+
+  /**
+    @details
+    The constructor 'tunes' the private and protected members of the
+    object constructed for the statistical table table_stat for 
+    the future updates/deletes of the record concerning the table 'tab'
+    from the database 'db'.
+  */
+
+  Table_stat(TABLE *stat, LEX_STRING *db, LEX_STRING *tab) 
+    :Stat_table(stat, db, tab)
+  {
+    common_init_table_stat();
+  }
+
+
+  /** 
+    @brief
+    Set the key fields for the statistical table table_stat
+
+    @details
+    The function sets the values of the fields db_name and table_name
+    in the record buffer for the statistical table table_stat.
+    These fields comprise the primary key for the table.
+
+    @note
+    The function is supposed to be called before any use of the  
+    method find_stat for an object of the Table_stat class. 
+  */
+
+  void set_key_fields()
+  {
+    db_name_field->store(db_name->str, db_name->length, system_charset_info);
+    table_name_field->store(table_name->str, table_name->length,
+                            system_charset_info);
+  }
+
+
+  /** 
+    @brief
+    Store statistical data into statistical fields of table_stat
+
+    @details
+    This implementation of a purely virtual method sets the value of the
+    column 'cardinality' of the statistical table table_stat according to
+    the value of the flag write_stat.cardinality_is_null and the value of
+    the field write_stat.cardinality' from the TABLE structure for 'table'.
+  */    
+
+  void store_stat_fields()
+  {
+    Field *stat_field= stat_table->field[TABLE_STAT_CARDINALITY];
+    if (table->collected_stats->cardinality_is_null)
+      stat_field->set_null();
+    else
+    {
+      stat_field->set_notnull();
+      stat_field->store(table->collected_stats->cardinality);
+    }
+  }
+
+
+  /**
+    @brief
+    Read statistical data from statistical fields of table_stat
+
+    @details
+    This implementation of a purely virtual method first looks for a record
+    the statistical table table_stat by its primary key set the record
+    buffer with the help of Table_stat::set_key_fields.  Then, if the row is
+    found the function reads the value of the column 'cardinality' of the table
+    table_stat and sets the value of the flag read_stat.cardinality_is_null
+    and the value of the field read_stat.cardinality' from the TABLE structure
+    for 'table' accordingly.
+  */    
+
+  void get_stat_values()
+  {
+    table_share->read_stats->cardinality_is_null= TRUE;
+    table_share->read_stats->cardinality= 0;
+    if (find_stat())
+    {
+      Field *stat_field= stat_table->field[TABLE_STAT_CARDINALITY];
+      if (!stat_field->is_null())
+      {
+        table_share->read_stats->cardinality_is_null= FALSE;
+        table_share->read_stats->cardinality= stat_field->val_int();
+      }
+    }
+  } 
+
+};
+
+
+/*
+  An object of the class Column_stat is created to read statistical data
+  on table columns from the statistical table column_stat, to update
+  column_stat with such statistical data, or to update columns
+  of the primary key, or to delete the record by its primary key or
+  its prefix.
+  Rows from the statistical table are read and updated always by 
+  primary key.
+*/ 
+
+class Column_stat: public Stat_table
+{
+
+private:
+
+  Field *db_name_field;     /* Field for the column column_stat.db_name */
+  Field *table_name_field;  /* Field for the column column_stat.table_name */
+  Field *column_name_field; /* Field for the column column_stat.column_name */
+
+  Field *table_field;  /* Field from 'table' to read /update statistics on */
+
+  void common_init_column_stat_table()
+  {
+    db_name_field= stat_table->field[COLUMN_STAT_DB_NAME];
+    table_name_field= stat_table->field[COLUMN_STAT_TABLE_NAME];
+    column_name_field= stat_table->field[COLUMN_STAT_COLUMN_NAME];
+  } 
+
+  void change_full_table_name(LEX_STRING *db, LEX_STRING *tab)
+  {
+     db_name_field->store(db->str, db->length, system_charset_info);
+     table_name_field->store(tab->str, tab->length, system_charset_info);
+  }
+
+public:
+
+  /**
+    @details
+    The constructor 'tunes' the private and protected members of the
+    constructed object for the statistical table column_stat to read/update
+    statistics on fields of the table 'tab'. The TABLE structure for the table
+    column_stat must be passed as a value for the parameter 'stat'.
+  */
+
+  Column_stat(TABLE *stat, TABLE *tab) :Stat_table(stat, tab)
+  {
+    common_init_column_stat_table();
+  } 
+
+
+  /**
+    @details
+    The constructor 'tunes' the private and protected members of the
+    object constructed for the statistical table column_stat for 
+    the future updates/deletes of the record concerning the table 'tab'
+    from the database 'db'. 
+  */
+
+  Column_stat(TABLE *stat, LEX_STRING *db, LEX_STRING *tab) 
+    :Stat_table(stat, db, tab)
+  {
+    common_init_column_stat_table();
+  } 
+
+  /** 
+    @brief
+    Set table name fields for the statistical table column_stat
+
+    @details
+    The function stores the values of the fields db_name and table_name 
+    of the statistical table column_stat in the record buffer.
+  */
+
+  void set_full_table_name()
+  {
+    db_name_field->store(db_name->str, db_name->length, system_charset_info);
+    table_name_field->store(table_name->str, table_name->length,
+                            system_charset_info);
+  }
+
+
+  /** 
+    @brief
+    Set the key fields for the statistical table column_stat
+
+    @param
+    col       Field for the 'table' column to read/update statistics on
+
+    @details
+    The function stores the values of the fields db_name, table_name and
+    column_name in the record buffer for the statistical table column_stat.
+    These fields comprise the primary key for the table.
+    It also sets table_field to the passed parameter.
+
+    @note
+    The function is supposed to be called before any use of the  
+    method find_stat for an object of the Column_stat class.
+  */
+
+  void set_key_fields(Field *col)
+  {
+    set_full_table_name();
+    const char *column_name= col->field_name;
+    column_name_field->store(column_name, strlen(column_name),
+                             system_charset_info);  
+    table_field= col;
+  }
+
+
+  /** 
+    @brief
+    Update the table name fields in the current record of stat_table
+
+    @details
+    The function updates the primary key fields containing database name,
+    table name, and column name for the last found record in the statistical
+    table column_stat.
+    
+    @retval
+    FALSE    success with the update of the record
+    @retval
+    TRUE     failure with the update of the record
+  */
+
+  bool update_column_key_part(const char *col)
+  {
+    store_record_for_update();
+    set_full_table_name();
+    column_name_field->store(col, strlen(col), system_charset_info);
+    bool rc= update_record();
+    store_record_for_lookup();
+    return rc;
+  }   
+
+
+  /** 
+    @brief
+    Store statistical data into statistical fields of column_stat
+
+    @details
+    This implementation of a purely virtual method sets the value of the
+    columns 'min_value', 'max_value', 'nulls_ratio', 'avg_length' and
+    'avg_frequency' of the stistical table columns_stat according to the
+    contents of the bitmap write_stat.column_stat_nulls and the values
+    of the fields min_value, max_value, nulls_ratio, avg_length and
+    avg_frequency of the structure write_stat from the Field structure
+    for the field 'table_field'.
+    The value of the k-th column in the table columns_stat is set to NULL
+    if the k-th bit in the bitmap 'column_stat_nulls' is set to 1. 
+
+    @note
+    A value from the field min_value/max_value is always converted
+    into a utf8 string. If the length of the column 'min_value'/'max_value'
+    is less than the length of the string the string is trimmed to fit the
+    length of the column. 
+  */    
+
+  void store_stat_fields()
+  {
+    char buff[MAX_FIELD_WIDTH];
+    String val(buff, sizeof(buff), &my_charset_utf8_bin);
+
+    for (uint i= COLUMN_STAT_MIN_VALUE; i <= COLUMN_STAT_AVG_FREQUENCY; i++)
+    {  
+      Field *stat_field= stat_table->field[i];
+      if (table_field->collected_stats->is_null(i))
+        stat_field->set_null();
+      else
+      {
+        stat_field->set_notnull();
+        switch (i) {
+        case COLUMN_STAT_MIN_VALUE:
+          if (table_field->type() == MYSQL_TYPE_BIT)
+            stat_field->store(table_field->collected_stats->min_value->val_int());
+          else
+          {
+            table_field->collected_stats->min_value->val_str(&val);
+            stat_field->store(val.ptr(), val.length(), &my_charset_utf8_bin);
+          }
+          break;
+        case COLUMN_STAT_MAX_VALUE:
+          if (table_field->type() == MYSQL_TYPE_BIT)
+            stat_field->store(table_field->collected_stats->max_value->val_int());
+          else
+          {
+            table_field->collected_stats->max_value->val_str(&val);
+            stat_field->store(val.ptr(), val.length(), &my_charset_utf8_bin);
+          }
+          break;
+        case COLUMN_STAT_NULLS_RATIO:
+          stat_field->store(table_field->collected_stats->get_nulls_ratio());
+          break;
+        case COLUMN_STAT_AVG_LENGTH:
+          stat_field->store(table_field->collected_stats->get_avg_length());
+          break;
+        case COLUMN_STAT_AVG_FREQUENCY:
+          stat_field->store(table_field->collected_stats->get_avg_frequency());
+          break;            
+        }
+      }
+    }
+  }
+
+
+  /** 
+    @brief
+    Read statistical data from statistical fields of column_stat
+
+    @details
+    This implementation of a purely virtual method first looks for a record
+    the statistical table column_stat by its primary key set the record
+    buffer with the help of Column_stat::set_key_fields. Then, if the row is
+    found, the function reads the values of the columns 'min_value',
+    'max_value', 'nulls_ratio', 'avg_length' and 'avg_frequency' of the
+    table column_stat and sets accordingly the value of the bitmap 
+    read_stat.column_stat_nulls' and the values of the fields min_value,
+    max_value, nulls_ratio, avg_length and avg_frequency of the structure
+    read_stat from the Field structure for the field 'table_field'.
+  */    
+
+  void get_stat_values()
+  {
+    table_field->read_stats->set_all_nulls();
+
+    if (table_field->read_stats->min_value)
+      table_field->read_stats->min_value->set_null();
+    if (table_field->read_stats->max_value)
+      table_field->read_stats->max_value->set_null();
+
+    if (find_stat())
+    {
+      char buff[MAX_FIELD_WIDTH];
+      String val(buff, sizeof(buff), &my_charset_utf8_bin);
+
+      for (uint i= COLUMN_STAT_MIN_VALUE; i <= COLUMN_STAT_AVG_FREQUENCY; i++)
+      {  
+        Field *stat_field= stat_table->field[i];
+
+        if (!stat_field->is_null() &&
+            (i > COLUMN_STAT_MAX_VALUE ||
+             (i == COLUMN_STAT_MIN_VALUE && 
+              table_field->read_stats->min_value) ||
+             (i == COLUMN_STAT_MAX_VALUE && 
+              table_field->read_stats->max_value)))
+        {
+          table_field->read_stats->set_not_null(i);
+
+          switch (i) {
+          case COLUMN_STAT_MIN_VALUE:
+            stat_field->val_str(&val);
+            table_field->read_stats->min_value->store(val.ptr(), val.length(),
+                                                      &my_charset_utf8_bin);
+            break;
+          case COLUMN_STAT_MAX_VALUE:
+            stat_field->val_str(&val);
+            table_field->read_stats->max_value->store(val.ptr(), val.length(),
+                                                      &my_charset_utf8_bin);
+            break;
+          case COLUMN_STAT_NULLS_RATIO:
+            table_field->read_stats->set_nulls_ratio(stat_field->val_real());
+            break;
+          case COLUMN_STAT_AVG_LENGTH:
+            table_field->read_stats->set_avg_length(stat_field->val_real());
+            break;
+          case COLUMN_STAT_AVG_FREQUENCY:
+            table_field->read_stats->set_avg_frequency(stat_field->val_real());
+            break;            
+          }
+        }
+      }
+    }
+  }
+
+};
+
+
+/*
+  An object of the class Index_stat is created to read statistical
+  data on tables from the statistical table table_stat, to update
+  index_stat with such statistical data, or to update columns
+  of the primary key, or to delete the record by its primary key or
+  its prefix. 
+  Rows from the statistical table are read and updated always by
+  primary key. 
+*/ 
+
+class Index_stat: public Stat_table
+{
+
+private:
+
+  Field *db_name_field;      /* Field for the column index_stat.db_name */
+  Field *table_name_field;   /* Field for the column index_stat.table_name */
+  Field *index_name_field;   /* Field for the column index_stat.table_name */
+  Field *prefix_arity_field; /* Field for the column index_stat.prefix_arity */
+
+  KEY *table_key_info;  /* Info on the index to read/update statistics on */
+  uint prefix_arity; /* Number of components of the index prefix of interest */
+
+  void common_init_index_stat_table()
+  {
+    db_name_field= stat_table->field[INDEX_STAT_DB_NAME];
+    table_name_field= stat_table->field[INDEX_STAT_TABLE_NAME];
+    index_name_field= stat_table->field[INDEX_STAT_INDEX_NAME];
+    prefix_arity_field= stat_table->field[INDEX_STAT_PREFIX_ARITY];
+  } 
+
+  void change_full_table_name(LEX_STRING *db, LEX_STRING *tab)
+  {
+     db_name_field->store(db->str, db->length, system_charset_info);
+     table_name_field->store(tab->str, tab->length, system_charset_info);
+  }
+
+public:
+
+
+  /**
+    @details
+    The constructor 'tunes' the private and protected members of the
+    constructed object for the statistical table index_stat to read/update
+    statistics on prefixes of different indexes of the table 'tab'.
+    The TABLE structure for the table index_stat must be passed as a value
+    for the parameter 'stat'.
+  */
+
+  Index_stat(TABLE *stat, TABLE*tab) :Stat_table(stat, tab)
+  {
+    common_init_index_stat_table();
+  }
+
+
+  /**
+    @details
+    The constructor 'tunes' the private and protected members of the
+    object constructed for the statistical table index_stat for 
+    the future updates/deletes of the record concerning the table 'tab'
+    from the database 'db'. 
+  */
+
+  Index_stat(TABLE *stat, LEX_STRING *db, LEX_STRING *tab) 
+    :Stat_table(stat, db, tab)
+  {
+    common_init_index_stat_table();
+  }
+
+
+  /**
+    @brief
+    Set table name fields for the statistical table index_stat
+
+    @details
+    The function stores the values of the fields db_name and table_name 
+    of the statistical table index_stat in the record buffer.
+  */
+
+  void set_full_table_name()
+  {
+    db_name_field->store(db_name->str, db_name->length, system_charset_info);
+    table_name_field->store(table_name->str, table_name->length,
+                            system_charset_info);
+  }
+
+  /** 
+    @brief
+    Set the key fields of index_stat used to access records for index prefixes
+
+    @param
+    index_info   Info for the index of 'table' to read/update statistics on
+
+    @details
+    The function sets the values of the fields db_name, table_name and
+    index_name in the record buffer for the statistical table index_stat. 
+    It also sets table_key_info to the passed parameter.
+
+    @note
+    The function is supposed to be called before any use of the method
+    find_next_stat_for_prefix for an object of the Index_stat class.
+  */
+
+  void set_index_prefix_key_fields(KEY *index_info)
+  {
+    set_full_table_name();
+    char *index_name= index_info->name;
+    index_name_field->store(index_name, strlen(index_name),
+                            system_charset_info);
+    table_key_info= index_info;
+  }
+
+
+  /** 
+    @brief
+    Set the key fields for the statistical table index_stat
+
+    @param
+    index_info   Info for the index of 'table' to read/update statistics on
+    @param
+    index_prefix_arity Number of components in the index prefix of interest
+
+    @details
+    The function sets the values of the fields db_name, table_name and
+    index_name, prefix_arity in the record buffer for the statistical
+    table index_stat. These fields comprise the primary key for the table. 
+
+    @note
+    The function is supposed to be called before any use of the  
+    method find_stat for an object of the Index_stat class.
+  */
+
+  void set_key_fields(KEY *index_info, uint index_prefix_arity)
+  {
+    set_index_prefix_key_fields(index_info);
+    prefix_arity= index_prefix_arity; 
+    prefix_arity_field->store(index_prefix_arity, TRUE);  
+  }
+
+
+  /** 
+    @brief
+    Store statistical data into statistical fields of table index_stat
+
+    @details
+    This implementation of a purely virtual method sets the value of the
+    column 'avg_frequency' of the statistical table index_stat according to
+    the value of write_stat.avg_frequency[Index_stat::prefix_arity]
+    from the KEY_INFO structure 'table_key_info'.
+    If the value of write_stat. avg_frequency[Index_stat::prefix_arity] is
+    equal  to 0, the value of the column is set to NULL.
+  */    
+
+  void store_stat_fields()
+  {
+    Field *stat_field= stat_table->field[INDEX_STAT_AVG_FREQUENCY];
+    double avg_frequency=
+      table_key_info->collected_stats->get_avg_frequency(prefix_arity-1);
+    if (avg_frequency == 0)
+      stat_field->set_null();
+    else
+    {
+      stat_field->set_notnull();
+      stat_field->store(avg_frequency);
+    }
+  }
+
+
+  /** 
+    @brief
+    Read statistical data from statistical fields of index_stat
+
+    @details
+    This implementation of a purely virtual method first looks for a record the
+    statistical table index_stat by its primary key set the record buffer with
+    the help of Index_stat::set_key_fields. If the row is found the function
+    reads the value of the column 'avg_freguency' of the table index_stat and
+    sets the value of read_stat.avg_frequency[Index_stat::prefix_arity]
+    from the KEY_INFO structure 'table_key_info' accordingly. If the value of
+    the column is NULL, read_stat.avg_frequency[Index_stat::prefix_arity] is
+    set to 0. Otherwise, read_stat.avg_frequency[Index_stat::prefix_arity] is
+    set to the value of the column.
+  */    
+
+  void get_stat_values()
+  {
+    double avg_frequency= 0;
+    if(find_stat())
+    {
+      Field *stat_field= stat_table->field[INDEX_STAT_AVG_FREQUENCY];
+      if (!stat_field->is_null())
+        avg_frequency= stat_field->val_real();
+    }
+    table_key_info->read_stats->set_avg_frequency(prefix_arity-1, avg_frequency);
+  }  
+
+};
+
+
+/*
+  The class Count_distinct_field is a helper class used to calculate
+  the number of distinct values for a column. The class employs the
+  Unique class for this purpose.
+  The class Count_distinct_field is used only by the function
+  collect_statistics_from_table to calculate the values for 
+  column avg_frequency of the statistical table column_stat.
+*/
+    
+class Count_distinct_field: public Sql_alloc
+{
+protected:
+
+  /* Field for which the number of distinct values is to be find out */
+  Field *table_field;  
+  Unique *tree;       /* The helper object to contain distinct values */
+  uint tree_key_length; /* The length of the keys for the elements of 'tree */
+
+public:
+
+  /**
+    @param
+    field               Field for which the number of distinct values is 
+                        to be find out
+    @param
+    max_heap_table_size The limit for the memory used by the RB tree container
+                        of the constructed Unique object 'tree' 
+
+    @details
+    The constructor sets the values of 'table_field' and 'tree_key_length',
+    and then calls the 'new' operation to create a Unique object for 'tree'.
+    The type of 'field' and the value max_heap_table_size of determine the set
+    of the parameters to be passed to the constructor of the Unique object. 
+  */  
+
+  Count_distinct_field(Field *field, uint max_heap_table_size)
+  {
+    qsort_cmp2 compare_key;
+    void* cmp_arg;
+    enum enum_field_types f_type= field->type();
+
+    table_field= field;
+    tree_key_length= field->pack_length();
+
+    if ((f_type == MYSQL_TYPE_VARCHAR) ||
+	(!field->binary() && (f_type == MYSQL_TYPE_STRING ||
+                              f_type == MYSQL_TYPE_VAR_STRING)))
+    {
+      compare_key= (qsort_cmp2) simple_str_key_cmp;
+      cmp_arg= (void*) field;      
+    }
+    else
+    {
+      cmp_arg= (void*) &tree_key_length;
+      compare_key= (qsort_cmp2) simple_raw_key_cmp;
+    }
+        
+    tree= new Unique(compare_key, cmp_arg,
+                     tree_key_length, max_heap_table_size);
+  }
+
+  virtual ~Count_distinct_field()
+  {
+    delete tree;
+    tree= NULL;
+  }
+
+  /* 
+    @brief
+    Check whether the Unique object tree has been successfully created
+  */
+  bool exists()
+  {
+    return (tree != NULL);
+  }
+
+  /*
+    @brief
+    Add the value of 'field' to the container of the Unique object 'tree'
+  */
+  virtual bool add()
+  {
+    return tree->unique_add(table_field->ptr);
+  }
+  
+  /*
+    @brief
+    Calculate the number of elements accumulated in the container of 'tree'
+  */
+  ulonglong get_value()
+  {
+    ulonglong count;
+    if (tree->elements == 0)
+      return (ulonglong) tree->elements_in_tree();
+    count= 0;  
+    tree->walk(count_distinct_walk, (void*) &count);
+    return count;
+  }
+};
+
+
+/* 
+  The class Count_distinct_field_bit is derived from the class 
+  Count_distinct_field to be used only for fields of the MYSQL_TYPE_BIT type.
+  The class provides a different implementation for the method add 
+*/
+
+class Count_distinct_field_bit: public Count_distinct_field
+{
+public:
+  Count_distinct_field_bit(Field *field, uint max_heap_table_size)
+    :Count_distinct_field(field, max_heap_table_size) {}
+  bool add()
+  {
+    longlong val= table_field->val_int();   
+    return tree->unique_add(&val);
+  }
+};
+
+
+/* 
+  The class Index_prefix_calc is a helper class used to calculate the values
+  for the column 'avg_frequency' of the statistical table index_stat.
+  For any table t from the database db and any k-component prefix of the
+  index i for this table the row from index_stat with the primary key
+  (db,t,i,k) must contain in the column 'avg_frequency' either NULL or 
+  the number that is the ratio of N and V, where N is the number of index
+  entries without NULL values in the first k components of the index i,
+  and V is the number of distinct tuples composed of the first k components
+  encountered among these index entries.  
+  Currently the objects of this class are used only by the function
+  collect_statistics_for_index. 
+*/
+
+class Index_prefix_calc: public Sql_alloc
+{
+
+private:
+
+  /* Table containing index specified by index_info */
+  TABLE *index_table;  
+  /* Info for the index i for whose prefix 'avg_frequency' is calculated */
+  KEY *index_info;  
+  /* The maximum number of the components in the prefixes of interest */   
+  uint prefixes; 
+  bool empty;  
+
+  /* This structure is created for every k components of the index i */
+  class Prefix_calc_state
+  {
+  public:
+    /* 
+      The number of the scanned index entries without nulls 
+      in the first k components
+    */
+    ulonglong entry_count;
+    /* 
+      The number if the scanned index entries without nulls with 
+      the last encountered k-component prefix
+    */
+    ulonglong prefix_count;
+    /* The values of the last encountered k-component prefix */
+    Cached_item *last_prefix;
+  };
+
+  /* 
+    Array of structures used to calculate 'avg_frequency' for different
+    prefixes of the index i
+  */   
+  Prefix_calc_state *calc_state;
+    
+public:
+
+  Index_prefix_calc(TABLE *table, KEY *key_info)
+    : index_table(table), index_info(key_info)
+  {
+    uint i;
+    Prefix_calc_state *state;
+    uint key_parts= table->actual_n_key_parts(key_info);
+    empty= TRUE;
+    prefixes= 0;
+    if ((calc_state=
+         (Prefix_calc_state *) sql_alloc(sizeof(Prefix_calc_state)*key_parts)))
+    {
+      uint keyno= key_info-table->key_info;
+      for (i= 0, state= calc_state; i < key_parts; i++, state++)
+      {
+        /* 
+          Do not consider prefixes containing a component that is only part
+          of the field. This limitation is set to avoid fetching data when
+          calculating the values of 'avg_frequency' for prefixes.
+	*/   
+        if (!key_info->key_part[i].field->part_of_key.is_set(keyno))
+          break;
+
+        if (!(state->last_prefix=
+              new Cached_item_field(key_info->key_part[i].field)))
+          break;
+        state->entry_count= state->prefix_count= 0;
+        prefixes++;
+      }
+    }
+  }
+
+  /** 
+    @breif
+    Change the elements of calc_state after reading the next index entry
+
+    @details
+    This function is to be called at the index scan each time the next
+    index entry has been read into the record buffer.
+    For each of the index prefixes the function checks whether nulls
+    are encountered in any of the k components of the prefix.
+    If this is not the case the value of calc_state[k-1].entry_count
+    is incremented by 1. Then the function checks whether the value of
+    any of these k components has changed. If so, the value of 
+    calc_state[k-1].prefix_count is incremented by 1. 
+  */
+
+  void add()
+  {
+    uint i;
+    Prefix_calc_state *state;
+    uint first_changed= prefixes;
+    for (i= prefixes, state= calc_state+prefixes-1; i; i--, state--)
+    {
+      if (state->last_prefix->cmp())
+        first_changed= i-1;
+    }
+    if (empty)
+    {
+      first_changed= 0;
+      empty= FALSE;
+    }
+    for (i= 0, state= calc_state; i < prefixes; i++, state++)
+    {
+      if (state->last_prefix->null_value)
+        break;
+      if (i >= first_changed)
+        state->prefix_count++;
+      state->entry_count++;
+    }   
+  }
+
+  /**
+    @brief
+    Calculate the values of avg_frequency for all prefixes of an index
+
+    @details
+    This function is to be called after the index scan to count the number
+    of distinct index prefixes has been done. The function calculates
+    the value of avg_frequency for the index prefix with k components
+    as calc_state[k-1].entry_count/calc_state[k-1].prefix_count.
+    If calc_state[k-1].prefix_count happens to be 0, the value of
+    avg_frequency[k-1] is set to 0, i.e. is considered as unknown.
+  */
+
+  void get_avg_frequency()
+  {
+    uint i;
+    Prefix_calc_state *state;
+    for (i= 0, state= calc_state; i < prefixes; i++, state++)
+    {
+      if (i < prefixes)
+      {
+        double val= state->prefix_count == 0 ?
+	            0 : (double) state->entry_count / state->prefix_count;                     
+        index_info->collected_stats->set_avg_frequency(i, val);
+      }
+    }
+  }       
+};
+
+
+/**
+  @brief 
+  Create fields for min/max values to collect column statistics
+
+  @param
+  table       Table the fields are created for
+
+  @details
+  The function first allocates record buffers to store min/max values
+  for 'table's fields. Then for each table field f it creates Field structures
+  that points to these buffers rather that to the record buffer as the
+  Field object for f does. The pointers of the created fields are placed
+  in the collected_stats structure of the Field object for f.
+  The function allocates the buffers for min/max values in the table
+  memory. 
+
+  @note 
+  The buffers allocated when min/max values are used to read statistics
+  from the persistent statistical tables differ from those buffers that
+  are used when statistics on min/max values for column is collected
+  as they are allocated in different mem_roots.
+  The same is true for the fields created for min/max values.  
+*/      
+
+static
+void create_min_max_stistical_fields_for_table(TABLE *table)
+{
+  Field *table_field;
+  Field **field_ptr;
+  uchar *record;
+  uint rec_buff_length= table->s->rec_buff_length;
+
+  for (field_ptr= table->field; *field_ptr; field_ptr++) 
+  {
+    table_field= *field_ptr;
+    table_field->collected_stats->max_value=
+      table_field->collected_stats->min_value= NULL;
+  }
+
+  if ((record= (uchar *) alloc_root(&table->mem_root, 2*rec_buff_length)))
+  {
+    for (uint i=0; i < 2; i++, record+= rec_buff_length)
+    {
+      for (field_ptr= table->field; *field_ptr; field_ptr++) 
+      {
+        Field *fld;
+        table_field= *field_ptr;
+        my_ptrdiff_t diff= record-table->record[0];
+        if (!bitmap_is_set(table->read_set, table_field->field_index))
+          continue; 
+        if (!(fld= table_field->clone(&table->mem_root, table, diff, TRUE)))
+          continue;
+        if (i == 0)
+          table_field->collected_stats->min_value= fld;
+        else
+          table_field->collected_stats->max_value= fld;
+      }
+    }
+  }
+}
+
+
+/**
+  @brief 
+  Create fields for min/max values to read column statistics
+
+  @param
+  thd          Thread handler
+  @param
+  table_share  Table share the fields are created for
+  @param
+  is_safe      TRUE <-> at any time only one thread can perform the function
+
+  @details
+  The function first allocates record buffers to store min/max values
+  for 'table_share's fields. Then for each field f it creates Field structures
+  that points to these buffers rather that to the record buffer as the
+  Field object for f does. The pointers of the created fields are placed
+  in the read_stats structure of the Field object for f.
+  The function allocates the buffers for min/max values in the table share
+  memory. 
+  If the parameter is_safe is TRUE then it is guaranteed that at any given time
+  only one thread is executed the code of the function.
+
+  @note 
+  The buffers allocated when min/max values are used to collect statistics
+  from the persistent statistical tables differ from those buffers that
+  are used when statistics on min/max values for column is read as they
+  are allocated in different mem_roots.
+  The same is true for the fields created for min/max values.  
+*/      
+
+static
+void create_min_max_stistical_fields_for_table_share(THD *thd,
+                                                     TABLE_SHARE *table_share,
+                                                     bool is_safe)
+{
+  Field *table_field;
+  Field **field_ptr;
+  uchar *record;
+  uint rec_buff_length= table_share->rec_buff_length;
+
+  for (field_ptr= table_share->field; *field_ptr; field_ptr++) 
+  {
+    table_field= *field_ptr;
+    table_field->read_stats->max_value=
+      table_field->read_stats->min_value= NULL;
+  }
+
+  if ((record= (uchar *) alloc_root(&table_share->mem_root, 2*rec_buff_length)))
+  {
+    for (uint i=0; i < 2; i++, record+= rec_buff_length)
+    {
+      for (field_ptr= table_share->field; *field_ptr; field_ptr++) 
+      {
+        Field *fld;
+        table_field= *field_ptr;
+        my_ptrdiff_t diff= record - table_share->default_values;
+        if (!(fld= table_field->clone(&table_share->mem_root, diff)))
+          continue;
+        store_address_if_first(i == 0 ?
+                               (void **) &table_field->read_stats->min_value :
+		               (void **) &table_field->read_stats->max_value,
+                               (void **) &fld, 
+                               is_safe);
+      }
+    }
+  }
+}
+
+
+/**
+  @brief 
+  Allocate memory for the table's statistical data to be collected
+
+  @param
+  table       Table for which the memory for statistical data is allocated
+
+  @note
+  The function allocates the memory for the statistical data on 'table' with
+  the intention to collect the data there. The memory is allocated for
+  the statistics on the table, on the table's columns, and on the table's
+  indexes. The memory is allocated in the table's mem_root.
+
+  @retval
+  0      If the memory for all statistical data has been successfully allocated  
+  @retval
+  1      Otherwise
+
+  @note 
+  Each thread allocates its own memory to collect statistics on the table
+  It allows us, for example, to collect statistics on the different indexes
+  of the same table in parallel. 
+*/      
+
+int alloc_statistics_for_table(THD* thd, TABLE *table)
+{ 
+  Field **field_ptr;
+  uint cnt= 0;
+
+  DBUG_ENTER("alloc_statistics_for_table");
+
+  Table_statistics *table_stats= 
+    (Table_statistics *) alloc_root(&table->mem_root,
+                                    sizeof(Table_statistics));
+
+  for (field_ptr= table->field; *field_ptr; field_ptr++, cnt++) ; 
+  Column_statistics_collected *column_stats=
+    (Column_statistics_collected *) alloc_root(&table->mem_root,
+                                    sizeof(Column_statistics_collected) * cnt);
+
+  uint keys= table->s->keys;
+  Index_statistics *index_stats=
+    (Index_statistics *) alloc_root(&table->mem_root,
+                                    sizeof(Index_statistics) * keys);
+
+  uint key_parts= table->s->ext_key_parts;
+  ulong *idx_avg_frequency= (ulong*) alloc_root(&table->mem_root,
+                                                sizeof(ulong) * key_parts);
+
+  if (!table_stats || !column_stats || !index_stats || !idx_avg_frequency)
+    DBUG_RETURN(1);
+
+  table->collected_stats= table_stats;
+  table_stats->column_stats= column_stats;
+  table_stats->index_stats= index_stats;
+  table_stats->idx_avg_frequency= idx_avg_frequency;
+  
+  memset(column_stats, 0, sizeof(Column_statistics) * cnt);
+
+  for (field_ptr= table->field; *field_ptr; field_ptr++, column_stats++)
+    (*field_ptr)->collected_stats= column_stats;
+
+  memset(idx_avg_frequency, 0, sizeof(ulong) * key_parts);
+
+  KEY *key_info, *end;
+  for (key_info= table->key_info, end= key_info + table->s->keys;
+       key_info < end; 
+       key_info++, index_stats++)
+  {
+    key_info->collected_stats= index_stats;
+    key_info->collected_stats->init_avg_frequency(idx_avg_frequency);
+    idx_avg_frequency+= key_info->ext_key_parts;
+  }
+
+  create_min_max_stistical_fields_for_table(table);
+
+  DBUG_RETURN(0);
+}
+
+
+/**
+  @brief 
+  Allocate memory for the statistical data used by a table share
+
+  @param
+  thd         Thread handler
+  @param
+  table_share Table share for which the memory for statistical data is allocated
+  @param
+  is_safe     TRUE <-> at any time only one thread can perform the function
+
+  @note
+  The function allocates the memory for the statistical data on a table in the
+  table's share memory with the intention to read the statistics there from
+  the system persistent statistical tables mysql.table_stat, mysql.column_stat,
+  mysql.index_stat. The memory is allocated for the statistics on the table,
+  on the tables's columns, and on the table's indexes. The memory is allocated
+  in the table_share's mem_root.
+  If the parameter is_safe is TRUE then it is guaranteed that at any given time
+  only one thread is executed the code of the function.
+
+  @retval
+  0     If the memory for all statistical data has been successfully allocated  
+  @retval
+  1     Otherwise
+
+  @note
+  The situation when more than one thread try to allocate memory for 
+  statistical data is rare. It happens under the following scenario:
+  1. One thread executes a query over table t with the system variable 
+    'use_stat_tables' set to 'never'.
+  2. After this the second thread sets 'use_stat_tables' to 'preferably'
+     and executes a query over table t.    
+  3. Simultaneously the third thread sets 'use_stat_tables' to 'preferably'
+     and executes a query over table t. 
+  Here the second and the third threads try to allocate the memory for
+  statistical data at the same time. The precautions are taken to
+  guarantee the correctness of the allocation.
+*/      
+
+int alloc_statistics_for_table_share(THD* thd, TABLE_SHARE *table_share, 
+                                     bool is_safe)
+{
+  
+  Field **field_ptr;
+  uint cnt= 0;
+
+  DBUG_ENTER("alloc_statistics_for_table_share");
+
+  DEBUG_SYNC(thd, "statistics_mem_alloc_start1");
+  DEBUG_SYNC(thd, "statistics_mem_alloc_start2");
+
+  Table_statistics *table_stats= 
+    (Table_statistics *) alloc_root(&table_share->mem_root,
+                                    sizeof(Table_statistics)); 
+  if (!table_stats)
+    DBUG_RETURN(1);
+  memset(table_stats, 0, sizeof(Table_statistics));
+  store_address_if_first((void **) &table_share->read_stats,
+                         (void **) &table_stats, is_safe);
+  table_stats= table_share->read_stats;
+
+  for (field_ptr= table_share->field; *field_ptr; field_ptr++, cnt++) ; 
+  Column_statistics *column_stats=
+    (Column_statistics *) alloc_root(&table_share->mem_root,
+                                     sizeof(Column_statistics) * cnt);
+  if (!column_stats)
+    DBUG_RETURN(1);
+  memset(column_stats, 0, sizeof(Column_statistics) * cnt);
+  store_address_if_first((void **) &table_stats->column_stats,
+                         (void **) &column_stats, is_safe);
+  column_stats= table_stats->column_stats;
+
+  for (field_ptr= table_share->field; *field_ptr; field_ptr++, column_stats++)
+    (*field_ptr)->read_stats= column_stats;
+
+  uint keys= table_share->keys;
+  Index_statistics *index_stats=
+    (Index_statistics *) alloc_root(&table_share->mem_root,
+                                    sizeof(Index_statistics) * keys);
+  if (!index_stats)
+    DBUG_RETURN(1);
+  memset(index_stats, 0, sizeof(Index_statistics) * keys);
+  store_address_if_first((void **) &table_stats->index_stats, 
+                         (void **) &index_stats, is_safe);
+  index_stats= table_stats->index_stats;
+
+  uint key_parts= table_share->ext_key_parts;
+  ulong *idx_avg_frequency= (ulong*) alloc_root(&table_share->mem_root,
+                                                sizeof(ulong) * key_parts);
+  if (!idx_avg_frequency)
+    DBUG_RETURN(1);
+  memset(idx_avg_frequency, 0, sizeof(ulong) * key_parts);
+  store_address_if_first((void **) &table_stats->idx_avg_frequency,
+                         (void **) &idx_avg_frequency, is_safe);
+  idx_avg_frequency= table_stats->idx_avg_frequency;
+  
+  KEY *key_info, *end;
+  for (key_info= table_share->key_info, end= key_info + table_share->keys;
+       key_info < end; 
+       key_info++, index_stats++)
+  {
+    key_info->read_stats= index_stats;
+    key_info->read_stats->init_avg_frequency(idx_avg_frequency);
+    idx_avg_frequency+= key_info->ext_key_parts;
+  }
+   
+  create_min_max_stistical_fields_for_table_share(thd, table_share, is_safe);
+ 
+  DBUG_RETURN(0);
+}
+
+
+/**
+  @brief
+  Initialize the aggregation fields to collect statistics on a column
+
+  @param
+  thd            Thread handler
+  @param
+  table_field    Column to collect statistics for
+*/
+
+inline
+void Column_statistics_collected::init(THD *thd, Field *table_field)
+{
+  uint max_heap_table_size= thd->variables.max_heap_table_size;
+
+  column= table_field;
+
+  set_all_nulls();
+
+  nulls= 0;
+  column_total_length= 0;
+  if (table_field->flags & BLOB_FLAG)
+    count_distinct= NULL;
+  else
+  {
+    count_distinct=
+      table_field->type() == MYSQL_TYPE_BIT ?
+      new Count_distinct_field_bit(table_field, max_heap_table_size) :
+      new Count_distinct_field(table_field, max_heap_table_size);
+  }
+  if (count_distinct && !count_distinct->exists())
+    count_distinct= NULL;
+}
+
+
+/**
+  @brief
+  Perform aggregation for a row when collecting statistics on a column
+
+  @param
+  rowno     The order number of the row
+*/
+
+inline
+void Column_statistics_collected::add(ha_rows rowno)
+{
+
+  if (column->is_null())
+    nulls++;
+  else
+  {
+    column_total_length+= column->value_length();
+    if (min_value && column->update_min(min_value, rowno == nulls))
+      set_not_null(COLUMN_STAT_MIN_VALUE);
+    if (max_value && column->update_max(max_value, rowno == nulls))
+      set_not_null(COLUMN_STAT_MAX_VALUE);
+    if (count_distinct) 
+      count_distinct->add();
+  } 
+}
+
+
+/**
+  @brief
+  Get the results of aggregation when collecting the statistics on a column
+  
+  @param
+  rows          The total number of rows in the table 
+*/
+
+inline
+void Column_statistics_collected::finish(ha_rows rows)
+{
+  double val;
+
+  if (rows)
+  {
+     val= (double) nulls / rows;
+     set_nulls_ratio(val);
+     set_not_null(COLUMN_STAT_NULLS_RATIO);
+  }
+  if (rows - nulls)
+  {
+     val= (double) column_total_length / (rows - nulls);
+     set_avg_length(val);
+     set_not_null(COLUMN_STAT_AVG_LENGTH);
+  }
+  if (count_distinct)
+  { 
+    ulonglong distincts= count_distinct->get_value();
+    if (distincts)
+    {
+      val= (double) (rows - nulls) / distincts;
+      set_avg_frequency(val); 
+      set_not_null(COLUMN_STAT_AVG_FREQUENCY);
+    }
+    delete count_distinct;
+    count_distinct= NULL;
+  }
+}
+
+
+/**
+  @brief
+  Clean up auxiliary structures used for aggregation
+*/
+
+inline
+void Column_statistics_collected::cleanup()
+{
+  if (count_distinct)
+  { 
+    delete count_distinct;
+    count_distinct= NULL;
+  }
+}
+
+
+/**
+  @brief
+  Collect statistical data on an index
+
+  @param 
+  table       The table the index belongs to
+  index       The number of this index in the table
+
+  @details
+  The function collects the value of 'avg_frequency' for the prefixes
+  on an index from 'table'. The index is specified by its number.
+  If the scan is successful the calculated statistics is saved in the
+  elements of the array write_stat.avg_frequency of the KEY_INFO structure
+  for the index. The statistics for the prefix with k components is saved
+  in the element number k-1.
+
+  @retval
+  0         If the statistics has been successfully collected  
+  @retval
+  1         Otherwise
+
+  @note
+  The function collects statistics for the index prefixes for one index
+  scan during which no data is fetched from the table records. That's why
+  statistical data for prefixes that contain part of a field is not
+  collected.
+  The function employs an object of the helper class Index_prefix_calc to
+  count for each index prefix the number of index entries without nulls and
+  the number of distinct entries among them.
+ 
+*/
+
+static
+int collect_statistics_for_index(THD *thd, TABLE *table, uint index)
+{
+  int rc= 0;
+  KEY *key_info= &table->key_info[index];
+  ha_rows rows= 0;
+  Index_prefix_calc index_prefix_calc(table, key_info);
+  DBUG_ENTER("collect_statistics_for_index");
+
+  DEBUG_SYNC(table->in_use, "statistics_collection_start1");
+  DEBUG_SYNC(table->in_use, "statistics_collection_start2");
+
+  table->key_read= 1;
+  table->file->extra(HA_EXTRA_KEYREAD);
+
+  table->file->ha_index_init(index, TRUE);
+  rc= table->file->ha_index_first(table->record[0]);
+  while (rc != HA_ERR_END_OF_FILE)
+  {
+    if (thd->killed)
+      break;
+
+    if (rc)
+      break;
+    rows++;
+    index_prefix_calc.add();
+    rc= table->file->ha_index_next(table->record[0]);
+  }
+  table->key_read= 0;
+  table->file->ha_index_end();
+
+  rc= (rc == HA_ERR_END_OF_FILE && !thd->killed) ? 0 : 1;
+
+  if (!rc)
+    index_prefix_calc.get_avg_frequency();
+
+  DBUG_RETURN(rc);            
+}
+
+
+/**
+  @brief 
+  Collect statistical data for a table
+
+  @param
+  thd         The thread handle
+  @param
+  table       The table to collect statistics on
+
+  @details
+  The function collects data for various statistical characteristics on
+  the table 'table'. These data is saved in the internal fields that could
+  be reached from 'table'. The data is prepared to be saved in the persistent
+  statistical table by the function update_statistics_for_table.
+  The collected statistical values are not placed in the same fields that
+  keep the statistical data used by the optimizer. Therefore, at any time,
+  there is no collision between the statistics being collected and the one
+  used by the optimizer to look for optimal query execution plans for other
+  clients.
+
+  @retval
+  0         If the statistics has been successfully collected  
+  @retval
+  1         Otherwise
+
+  @note
+  The function first collects statistical data for statistical characteristics
+  to be saved in the statistical tables table_stat and column_stat. To do this
+  it performs a full table scan of 'table'. At this scan the function collects
+  statistics on each column of the table and count the total number of the
+  scanned rows. To calculate the value of 'avg_frequency' for a column the
+  function constructs an object of the helper class Count_distinct_field
+  (or its derivation). Currently this class cannot count the number of
+  distinct values for blob columns. So the value of 'avg_frequency' for
+  blob columns is always null.
+  After the full table scan the function calls collect_statistics_for_index
+  for each table index. The latter performs full index scan for each index.
+
+  @note
+  Currently the statistical data is collected indiscriminately for all
+  columns/indexes of 'table', for all statistical characteristics.
+  TODO. Collect only specified statistical characteristics for specified
+  columns/indexes.
+
+  @note
+  Currently the process of collecting statistical data is not optimized.
+  For example, 'avg_frequency' for a column could be copied from the
+  'avg_frequency' collected for an index if this column is used as the
+  first component of the index. Min and min values for this column could
+  be extracted from the index as well.       
+*/
+
+int collect_statistics_for_table(THD *thd, TABLE *table)
+{
+  int rc;
+  Field **field_ptr;
+  Field *table_field;
+  ha_rows rows= 0;
+  handler *file=table->file;
+
+  DBUG_ENTER("collect_statistics_for_table");
+
+  table->collected_stats->cardinality_is_null= TRUE;
+  table->collected_stats->cardinality= 0;
+ 
+  for (field_ptr= table->field; *field_ptr; field_ptr++)
+  {
+    table_field= *field_ptr;   
+    if (!bitmap_is_set(table->read_set, table_field->field_index))
+      continue; 
+    table_field->collected_stats->init(thd, table_field);
+  }
+
+  /* Perform a full table scan to collect statistics on 'table's columns */
+  if (!(rc= file->ha_rnd_init(TRUE)))
+  {  
+    while ((rc= file->ha_rnd_next(table->record[0])) != HA_ERR_END_OF_FILE)
+    {
+      if (thd->killed)
+        break;
+
+      if (rc)
+      {
+        if (rc == HA_ERR_RECORD_DELETED)
+          continue;
+        break;
+      }
+
+      for (field_ptr= table->field; *field_ptr; field_ptr++)
+      {
+        table_field= *field_ptr;
+        if (!bitmap_is_set(table->read_set, table_field->field_index))
+          continue;  
+        table_field->collected_stats->add(rows);
+      }
+      rows++;
+    }
+    file->ha_rnd_end();
+  }
+  rc= (rc == HA_ERR_END_OF_FILE && !thd->killed) ? 0 : 1;
+
+  /* 
+    Calculate values for all statistical characteristics on columns and
+    and for each field f of 'table' save them in the write_stat structure
+    from the Field object for f. 
+  */
+  if (!rc)
+  {
+    table->collected_stats->cardinality_is_null= FALSE;
+    table->collected_stats->cardinality= rows;
+  }
+
+  for (field_ptr= table->field; *field_ptr; field_ptr++)
+  {
+    table_field= *field_ptr;
+    if (!bitmap_is_set(table->read_set, table_field->field_index))
+      continue;
+    if (!rc)
+      table_field->collected_stats->finish(rows);
+    else
+      table_field->collected_stats->cleanup();
+  }
+
+  if (!rc)
+  {
+    uint key;
+    key_map::Iterator it(table->keys_in_use_for_query);
+
+    MY_BITMAP *save_read_set= table->read_set;
+    table->read_set= &table->tmp_set;
+    bitmap_set_all(table->read_set);
+     
+    /* Collect statistics for indexes */
+    while ((key= it++) != key_map::Iterator::BITMAP_END)
+    {
+      if ((rc= collect_statistics_for_index(thd, table, key)))
+        break;
+    }
+
+    table->read_set= save_read_set;
+  }
+
+  DBUG_RETURN(rc);          
+}
+
+
+/**
+  @brief
+  Update statistics for a table in the persistent statistical tables
+
+  @param
+  thd         The thread handle
+  @param
+  table       The table to collect statistics on
+
+  @details
+  For each statistical table st the function looks for the rows from this
+  table that contain statistical data on 'table'. If rows with given 
+  statistical characteristics exist they are updated with the new statistical
+  values taken from internal structures for 'table'. Otherwise new rows
+  with these statistical characteristics are added into st.
+  It is assumed that values stored in the statistical tables are found and
+  saved by the function collect_statistics_for_table. 
+
+  @retval
+  0         If all statistical tables has been successfully updated  
+  @retval
+  1         Otherwise
+
+  @note
+  The function is called when executing the ANALYZE actions for 'table'.
+  The function first unlocks the opened table the statistics on which has
+  been collected, but does not closes it, so all collected statistical data
+  remains in internal structures for 'table'. Then the function opens the
+  statistical tables and writes the statistical data for 'table'into them.
+  It is not allowed just to open statistical tables for writing when some
+  other tables are locked for reading.
+  After the statistical tables have been opened they are updated one by one
+  with the new statistics on 'table'. Objects of the helper classes
+  Table_stat, Column_stat and Index_stat are employed for this. 
+  After having been updated the statistical system tables are closed.     
+*/
+
+int update_statistics_for_table(THD *thd, TABLE *table)
+{
+  TABLE_LIST tables[STATISTICS_TABLES];
+  Open_tables_backup open_tables_backup;
+  uint i;
+  int err;
+  bool save_binlog_row_based;
+  int rc= 0;
+  TABLE *stat_table;
+
+  DBUG_ENTER("update_statistics_for_table");
+
+  init_table_list_for_stat_tables(tables, TRUE);
+  init_mdl_requests(tables);
+
+  if (unlock_tables_n_open_system_tables_for_write(thd,
+                                                   tables,
+                                                   &open_tables_backup))
+  {
+    thd->clear_error();
+    DBUG_RETURN(rc);
+  }
+   
+  if ((save_binlog_row_based= thd->is_current_stmt_binlog_format_row()))
+    thd->clear_current_stmt_binlog_format_row();
+
+  /* Update the statistical table table_stat */
+  stat_table= tables[TABLE_STAT].table;
+  Table_stat table_stat(stat_table, table);
+  restore_record(stat_table, s->default_values);
+  table_stat.set_key_fields();
+  err= table_stat.update_stat();
+  if (err)
+    rc= 1;
+
+  /* Update the statistical table colum_stat */
+  stat_table= tables[COLUMN_STAT].table;
+  Column_stat column_stat(stat_table, table);
+  for (Field **field_ptr= table->field; *field_ptr; field_ptr++)
+  {
+    Field *table_field= *field_ptr;
+    if (!bitmap_is_set(table->read_set, table_field->field_index))
+      continue;
+    restore_record(stat_table, s->default_values);
+    column_stat.set_key_fields(table_field);
+    err= column_stat.update_stat();
+    if (err && !rc)
+      rc= 1;
+  }
+
+  /* Update the statistical table index_stat */
+  stat_table= tables[INDEX_STAT].table;
+  uint key;
+  key_map::Iterator it(table->keys_in_use_for_query);
+  Index_stat index_stat(stat_table, table);
+
+  while ((key= it++) != key_map::Iterator::BITMAP_END)
+  {
+    KEY *key_info= table->key_info+key;
+    uint key_parts= table->actual_n_key_parts(key_info);
+    for (i= 0; i < key_parts; i++)
+    {
+      restore_record(stat_table, s->default_values);
+      index_stat.set_key_fields(key_info, i+1);
+      err= index_stat.update_stat();
+      if (err && !rc)
+        rc= 1;
+    }
+  }
+
+  if (save_binlog_row_based)
+    thd->set_current_stmt_binlog_format_row();
+
+  close_system_tables(thd, &open_tables_backup);
+
+  DBUG_RETURN(rc);
+}
+
+
+/**
+  @brief
+  Read statistics for a table from the persistent statistical tables
+
+  @param
+  thd         The thread handle
+  @param
+  table       The table to read statistics on
+  @param
+  stat_tables The array of TABLE_LIST objects for statistical tables
+
+  @details
+  For each statistical table the function looks for the rows from this
+  table that contain statistical data on 'table'. If such rows is found
+  the data from statistical columns of it is read into the appropriate
+  fields of internal structures for 'table'. Later at the query processing
+  this data are supposed to be used by the optimizer. 
+  The parameter stat_tables should point to an array of TABLE_LIST
+  objects for all statistical tables linked into a list. All statistical
+  tables are supposed to be opened.  
+  The function is called by read_statistics_for_table_if_needed().
+
+  @retval
+  0         If data has been successfully read for the table  
+  @retval
+  1         Otherwise
+
+  @note
+  Objects of the helper classes Table_stat, Column_stat and Index_stat
+  are employed to read statistical data from the statistical tables. 
+  now.        
+*/
+
+static
+int read_statistics_for_table(THD *thd, TABLE *table, TABLE_LIST *stat_tables)
+{
+  uint i;
+  TABLE *stat_table;
+  Field *table_field;
+  Field **field_ptr;
+  KEY *key_info, *key_info_end;
+  TABLE_SHARE *table_share= table->s;
+
+  DBUG_ENTER("read_statistics_for_table");
+
+  /* Read statistics from the statistical table table_stat */
+  stat_table= stat_tables[TABLE_STAT].table;
+  Table_stat table_stat(stat_table, table);
+  table_stat.set_key_fields();
+  table_stat.get_stat_values();
+   
+  /* Read statistics from the statistical table column_stat */
+  stat_table= stat_tables[COLUMN_STAT].table;
+  Column_stat column_stat(stat_table, table);
+  for (field_ptr= table_share->field; *field_ptr; field_ptr++)
+  {
+    table_field= *field_ptr;
+    column_stat.set_key_fields(table_field);
+    column_stat.get_stat_values();
+  }
+
+  /* Read statistics from the statistical table index_stat */
+  stat_table= stat_tables[INDEX_STAT].table;
+  Index_stat index_stat(stat_table, table);
+  for (key_info= table_share->key_info,
+       key_info_end= key_info + table_share->keys;
+       key_info < key_info_end; key_info++)
+  {
+    uint key_parts= key_info->ext_key_parts;
+    for (i= 0; i < key_parts; i++)
+    {
+      index_stat.set_key_fields(key_info, i+1);
+      index_stat.get_stat_values();
+    }
+   
+    key_part_map ext_key_part_map= key_info->ext_key_part_map;
+    if (key_info->key_parts != key_info->ext_key_parts &&
+        key_info->read_stats->get_avg_frequency(key_info->key_parts) == 0)
+    {
+      KEY *pk_key_info= table_share->key_info + table_share->primary_key;
+      uint k= key_info->key_parts;
+      uint pk_parts= pk_key_info->key_parts;
+      ha_rows n_rows= table_share->read_stats->cardinality;
+      double k_dist= n_rows / key_info->read_stats->get_avg_frequency(k-1);
+      uint m= 0;
+      for (uint j= 0; j < pk_parts; j++)
+      {
+        if (!(ext_key_part_map & 1 << j))
+	{
+          for (uint l= k; l < k + m; l++)
+	  {
+            double avg_frequency=
+                     pk_key_info->read_stats->get_avg_frequency(j-1);
+            set_if_smaller(avg_frequency, 1);
+            double val= pk_key_info->read_stats->get_avg_frequency(j) /
+	                avg_frequency; 
+	    key_info->read_stats->set_avg_frequency (l, val);
+          }
+        }
+        else
+	{
+	  double avg_frequency= pk_key_info->read_stats->get_avg_frequency(j);
+	  key_info->read_stats->set_avg_frequency(k + m, avg_frequency);
+	  m++;
+        }    
+      }      
+      for (uint l= k; l < k + m; l++)
+      {
+        double avg_frequency= key_info->read_stats->get_avg_frequency(l);
+        if (avg_frequency == 0 ||
+            table_share->read_stats->cardinality_is_null)
+          avg_frequency= 1;
+        else if (avg_frequency > 1)
+	{
+          avg_frequency/= k_dist;
+          set_if_bigger(avg_frequency, 1);
+	}
+        key_info->read_stats->set_avg_frequency(l, avg_frequency);
+      }
+    }
+  }
+      
+  DBUG_RETURN(0);
+}
+
+
+/**
+  @brief
+  Check whether any statistics is to be read for tables from a table list
+
+  @param
+  thd         The thread handle
+  @param
+  tables      The tables list for whose tables the check is to be done
+
+  @details
+  The function checks whether for any of the tables opened and locked for
+  a statement statistics from statistical tables is needed to be read.
+
+  @retval
+  TRUE        statistics for any of the tables is needed to be read 
+  @retval
+  FALSE       Otherwise
+*/
+
+static
+bool statistics_for_tables_is_needed(THD *thd, TABLE_LIST *tables)
+{
+  if (thd->bootstrap || thd->variables.use_stat_tables == 0)
+    return FALSE;
+
+  if (!tables)
+    return FALSE;
+  
+  switch(thd->lex->sql_command) {
+  case SQLCOM_SELECT:
+  case SQLCOM_INSERT:
+  case SQLCOM_INSERT_SELECT:
+  case SQLCOM_UPDATE:
+  case SQLCOM_UPDATE_MULTI:
+  case SQLCOM_DELETE:
+  case SQLCOM_DELETE_MULTI:
+  case SQLCOM_REPLACE:
+  case SQLCOM_REPLACE_SELECT:
+    break;
+  default: 
+    return FALSE;
+  }
+
+  for (TABLE_LIST *tl= tables; tl; tl= tl->next_global)
+  {
+    if (!tl->is_view_or_derived() && tl->table)
+    {
+      TABLE_SHARE *table_share= tl->table->s;
+      if (table_share && 
+          table_share->stats_can_be_read &&
+          !table_share->stats_is_read)
+        return TRUE;
+    } 
+  }
+
+  return FALSE;
+}
+
+
+/**
+  @brief
+  Read statistics for tables from a table list if it is needed
+
+  @param
+  thd         The thread handle
+  @param
+  tables      The tables list for whose tables to read statistics
+
+  @details
+  The function first checks whether for any of the tables opened and locked
+  for a statement statistics from statistical tables is needed to be read.
+  Then, if so, it opens system statistical tables for read and reads
+  the statistical data from them for those tables from the list for which it
+  makes sense. Then the function closes system statistical tables.
+
+  @retval
+  0       Statistics for tables was successfully read  
+  @retval
+  1       Otherwise
+*/
+
+int read_statistics_for_tables_if_needed(THD *thd, TABLE_LIST *tables)
+{
+  TABLE_LIST stat_tables[STATISTICS_TABLES];
+  Open_tables_backup open_tables_backup;
+
+  DBUG_ENTER("read_statistics_for_table_if_needed");
+
+  if (!statistics_for_tables_is_needed(thd, tables))
+    DBUG_RETURN(0);
+
+  init_table_list_for_stat_tables(stat_tables, FALSE);  
+  init_mdl_requests(stat_tables);
+  if (open_system_tables_for_read(thd, stat_tables, &open_tables_backup))
+  {
+    thd->clear_error();
+    DBUG_RETURN(1);
+  }
+
+  for (TABLE_LIST *tl= tables; tl; tl= tl->next_global)
+  {
+    if (!tl->is_view_or_derived() && tl->table)
+    { 
+      TABLE_SHARE *table_share= tl->table->s;
+      if (table_share && 
+          table_share->stats_can_be_read &&
+	  !table_share->stats_is_read)
+      {
+        (void) read_statistics_for_table(thd, tl->table, stat_tables);
+        table_share->stats_is_read= TRUE;
+      }
+    }
+  }  
+
+  close_system_tables(thd, &open_tables_backup);
+
+  DBUG_RETURN(0);
+}
+
+
+/**
+  @brief
+  Delete statistics on a table from all statistical tables
+
+  @param
+  thd         The thread handle
+  @param
+  db          The name of the database the table belongs to
+  @param
+  tab         The name of the table whose statistics is to be deleted
+
+  @details
+  The function delete statistics on the table called 'tab' of the database
+  'db' from all statistical tables: table_stat, column_stat, index_stat.
+
+  @retval
+  0         If all deletions are successful  
+  @retval
+  1         Otherwise
+
+  @note
+  The function is called when executing the statement DROP TABLE 'tab'.
+*/
+
+int delete_statistics_for_table(THD *thd, LEX_STRING *db, LEX_STRING *tab)
+{
+  int err;
+  bool save_binlog_row_based;
+  TABLE *stat_table;
+  TABLE_LIST tables[STATISTICS_TABLES];
+  Open_tables_backup open_tables_backup;
+  int rc= 0;
+
+  DBUG_ENTER("delete_statistics_for_table");
+   
+  init_table_list_for_stat_tables(tables, TRUE);
+  init_mdl_requests(tables);
+
+  if (open_system_tables_for_read(thd,
+                                  tables,
+                                  &open_tables_backup))
+  {
+    thd->clear_error();
+    DBUG_RETURN(rc);
+  }
+
+  if ((save_binlog_row_based= thd->is_current_stmt_binlog_format_row()))
+    thd->clear_current_stmt_binlog_format_row();
+
+  /* Delete statistics on table from the statistical table index_stat */
+  stat_table= tables[INDEX_STAT].table;
+  Index_stat index_stat(stat_table, db, tab);
+  index_stat.set_full_table_name();
+  while (index_stat.find_next_stat_for_prefix(2))
+  {
+    err= index_stat.delete_stat();
+    if (err & !rc)
+      rc= 1;
+  }
+
+  /* Delete statistics on table from the statistical table column_stat */
+  stat_table= tables[COLUMN_STAT].table;
+  Column_stat column_stat(stat_table, db, tab);
+  column_stat.set_full_table_name();
+  while (column_stat.find_next_stat_for_prefix(2))
+  {
+    err= column_stat.delete_stat();
+    if (err & !rc)
+      rc= 1;
+  }
+   
+  /* Delete statistics on table from the statistical table table_stat */
+  stat_table= tables[TABLE_STAT].table;
+  Table_stat table_stat(stat_table, db, tab);
+  table_stat.set_key_fields();
+  if (table_stat.find_stat())
+  {
+    err= table_stat.delete_stat();
+    if (err & !rc)
+      rc= 1;
+  }
+
+  if (save_binlog_row_based)
+    thd->set_current_stmt_binlog_format_row();
+
+  close_system_tables(thd, &open_tables_backup);
+
+  DBUG_RETURN(rc);
+}
+
+
+/**
+  @brief
+  Delete statistics on a column of the specified table
+
+  @param
+  thd         The thread handle
+  @param
+  tab         The table the column belongs to
+  @param
+  col         The field of the column whose statistics is to be deleted
+
+  @details
+  The function delete statistics on the column 'col' belonging to the table 
+  'tab' from the statistical table column_stat. 
+
+  @retval
+  0         If the deletion is successful  
+  @retval
+  1         Otherwise
+
+  @note
+  The function is called when dropping a table column  or when changing
+  the definition of this column.
+*/
+
+int delete_statistics_for_column(THD *thd, TABLE *tab, Field *col)
+{
+  int err;
+  bool save_binlog_row_based;
+  TABLE *stat_table;
+  TABLE_LIST tables;
+  Open_tables_backup open_tables_backup;
+  int rc= 0;
+
+  DBUG_ENTER("delete_statistics_for_column");
+   
+  init_table_list_for_single_stat_table(&tables, &stat_table_name[1], TRUE);
+  init_mdl_requests(&tables);
+
+  if (open_system_tables_for_read(thd,
+                                  &tables,
+                                  &open_tables_backup))
+  {
+    thd->clear_error();
+    DBUG_RETURN(rc);
+  }
+
+  if ((save_binlog_row_based= thd->is_current_stmt_binlog_format_row()))
+    thd->clear_current_stmt_binlog_format_row();
+
+  stat_table= tables.table;
+  Column_stat column_stat(stat_table, tab);
+  column_stat.set_key_fields(col);
+  if (column_stat.find_stat())
+  {
+    err= column_stat.delete_stat();
+    if (err)
+      rc= 1;
+  }
+
+  if (save_binlog_row_based)
+    thd->set_current_stmt_binlog_format_row();
+
+  close_system_tables(thd, &open_tables_backup);
+
+  DBUG_RETURN(rc);
+}
+
+
+/**
+  @brief
+  Delete statistics on an index of the specified table
+
+  @param
+  thd         The thread handle
+  @param
+  tab         The table the index belongs to
+  @param
+  key_info    The descriptor of the index whose statistics is to be deleted
+
+  @details
+  The function delete statistics on the index  specified by 'key_info'
+  defined on the table 'tab' from the statistical table index_stat.
+
+  @retval
+  0         If the deletion is successful  
+  @retval
+  1         Otherwise
+
+  @note
+  The function is called when dropping an index, or dropping/changing the
+   definition of a column used in the definition of the index. 
+*/
+
+int delete_statistics_for_index(THD *thd, TABLE *tab, KEY *key_info)
+{
+  int err;
+  bool save_binlog_row_based;
+  TABLE *stat_table;
+  TABLE_LIST tables;
+  Open_tables_backup open_tables_backup;
+  int rc= 0;
+
+  DBUG_ENTER("delete_statistics_for_index");
+   
+  init_table_list_for_single_stat_table(&tables, &stat_table_name[2], TRUE);
+  init_mdl_requests(&tables);
+
+  if (open_system_tables_for_read(thd,
+                                  &tables,
+                                  &open_tables_backup))
+  {
+    thd->clear_error();
+    DBUG_RETURN(rc);
+  }
+
+  if ((save_binlog_row_based= thd->is_current_stmt_binlog_format_row()))
+    thd->clear_current_stmt_binlog_format_row();
+
+  stat_table= tables.table;
+  Index_stat index_stat(stat_table, tab);
+  index_stat.set_index_prefix_key_fields(key_info);
+  while (index_stat.find_next_stat_for_prefix(3))
+  {
+    err= index_stat.delete_stat();
+    if (err && !rc)
+      rc= 1;
+  }
+
+  if (save_binlog_row_based)
+    thd->set_current_stmt_binlog_format_row();
+
+  close_system_tables(thd, &open_tables_backup);
+
+  DBUG_RETURN(rc);
+}
+
+
+/**
+  @brief
+  Rename a table in all statistical tables
+
+  @param
+  thd         The thread handle
+  @param
+  db          The name of the database the table belongs to
+  @param
+  tab         The name of the table to be renamed in statistical tables
+  @param
+  new_tab     The new name of the table
+
+  @details
+  The function replaces the name of the table 'tab' from the database 'db' 
+  for 'new_tab' in all all statistical tables: table_stat, column_stat,
+  index_stat.
+
+  @retval
+  0         If all updates of the table name are successful  
+  @retval
+  1         Otherwise
+
+  @note
+  The function is called when executing any statement that renames a table
+*/
+
+int rename_table_in_stat_tables(THD *thd, LEX_STRING *db, LEX_STRING *tab,
+                                LEX_STRING *new_db, LEX_STRING *new_tab)
+{
+  int err;
+  bool save_binlog_row_based;
+  TABLE *stat_table;
+  TABLE_LIST tables[STATISTICS_TABLES];
+  Open_tables_backup open_tables_backup;
+  int rc= 0;
+
+  DBUG_ENTER("rename_table_in_stat_tables");
+   
+  init_table_list_for_stat_tables(tables, TRUE);
+  init_mdl_requests(tables);
+
+  if (open_system_tables_for_read(thd,
+                                  tables,
+                                  &open_tables_backup))
+  {
+    thd->clear_error();
+    DBUG_RETURN(rc);
+  }
+
+  if ((save_binlog_row_based= thd->is_current_stmt_binlog_format_row()))
+    thd->clear_current_stmt_binlog_format_row();
+
+  /* Rename table in the statistical table index_stat */
+  stat_table= tables[INDEX_STAT].table;
+  Index_stat index_stat(stat_table, db, tab);
+  index_stat.set_full_table_name();
+  while (index_stat.find_next_stat_for_prefix(2))
+  {
+    err= index_stat.update_table_name_key_parts(new_db, new_tab);
+    if (err & !rc)
+      rc= 1;
+    index_stat.set_full_table_name();
+  }
+
+  /* Rename table in the statistical table column_stat */
+  stat_table= tables[COLUMN_STAT].table;
+  Column_stat column_stat(stat_table, db, tab);
+  column_stat.set_full_table_name();
+  while (column_stat.find_next_stat_for_prefix(2))
+  {
+    err= column_stat.update_table_name_key_parts(new_db, new_tab);
+    if (err & !rc)
+      rc= 1;
+    column_stat.set_full_table_name();
+  }
+   
+  /* Rename table in the statistical table table_stat */
+  stat_table= tables[TABLE_STAT].table;
+  Table_stat table_stat(stat_table, db, tab);
+  table_stat.set_key_fields();
+  if (table_stat.find_stat())
+  {
+    err= table_stat.update_table_name_key_parts(new_db, new_tab);
+    if (err & !rc)
+      rc= 1;
+  }
+
+  if (save_binlog_row_based)
+    thd->set_current_stmt_binlog_format_row();
+
+  close_system_tables(thd, &open_tables_backup);
+
+  DBUG_RETURN(rc);
+}
+
+
+/**
+  @brief
+  Rename a column in the statistical table column_stat
+
+  @param
+  thd         The thread handle
+  @param
+  tab         The table the column belongs to
+  @param
+  col         The column to be renamed
+  @param
+  new_name    The new column name
+
+  @details
+  The function replaces the name of the column 'col' belonging to the table 
+  'tab' for 'new_name' in the statistical table column_stat..
+
+  @retval
+  0         If all updates of the table name are successful  
+  @retval
+  1         Otherwise
+
+  @note
+  The function is called when executing any statement that renames a column,
+  but does not change the column definition.
+*/
+
+int rename_column_in_stat_tables(THD *thd, TABLE *tab, Field *col,
+                                 const char *new_name)
+{
+  int err;
+  bool save_binlog_row_based;
+  TABLE *stat_table;
+  TABLE_LIST tables;
+  Open_tables_backup open_tables_backup;
+  int rc= 0;
+
+  DBUG_ENTER("rename_column_in_stat_tables");
+   
+  init_table_list_for_single_stat_table(&tables, &stat_table_name[1], TRUE);
+  init_mdl_requests(&tables);
+
+  if (open_system_tables_for_read(thd,
+                                  &tables,
+                                  &open_tables_backup))
+  {
+    thd->clear_error();
+    DBUG_RETURN(rc);
+  }
+
+  if ((save_binlog_row_based= thd->is_current_stmt_binlog_format_row()))
+    thd->clear_current_stmt_binlog_format_row();
+
+  /* Rename column in the statistical table table_stat */
+  stat_table= tables.table;
+  Column_stat column_stat(stat_table, tab);
+  column_stat.set_key_fields(col);
+  if (column_stat.find_stat())
+  { 
+    err= column_stat.update_column_key_part(new_name);
+    if (err & !rc)
+      rc= 1;
+  }
+
+  if (save_binlog_row_based)
+    thd->set_current_stmt_binlog_format_row();
+
+  close_system_tables(thd, &open_tables_backup);
+
+  DBUG_RETURN(rc);
+}
+
+
+/**
+  @brief
+  Set statistics for a table that will be used by the optimizer 
+
+  @param
+  thd         The thread handle
+  @param
+  table       The table to set statistics for 
+
+  @details
+  Depending on the value of thd->variables.use_stat_tables 
+  the function performs the settings for the table that will control
+  from where the statistical data used by the optimizer will be taken.
+*/
+
+void set_statistics_for_table(THD *thd, TABLE *table)
+{
+  uint use_stat_table_mode= thd->variables.use_stat_tables;
+  table->used_stat_records= 
+    (use_stat_table_mode <= 1 ||
+     !table->s->stats_is_read || !table->s->read_stats ||
+     table->s->read_stats->cardinality_is_null) ?
+    table->file->stats.records : table->s->read_stats->cardinality;
+  KEY *key_info, *key_info_end;
+  for (key_info= table->key_info, key_info_end= key_info+table->s->keys;
+       key_info < key_info_end; key_info++)
+  {
+    key_info->is_statistics_from_stat_tables=
+      (use_stat_table_mode > 1  && table->s->stats_is_read &&
+       key_info->read_stats &&
+       key_info->read_stats->avg_frequency_is_inited() &&
+       key_info->read_stats->get_avg_frequency(0) > 0.5);
+  }
+}

=== added file 'sql/sql_statistics.h'
--- a/sql/sql_statistics.h	1970-01-01 00:00:00 +0000
+++ b/sql/sql_statistics.h	2012-07-27 00:50:08 +0000
@@ -0,0 +1,218 @@
+/* Copyright 2006-2008 MySQL AB, 2008 Sun Microsystems, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+#ifndef SQL_STATISTICS_H
+#define SQL_STATISTICS_H
+
+/* 
+  These enumeration types comprise the dictionary of three
+  statistical tables table_stat, column_stat and index_stat
+  as they defined in ../scripts/mysql_system_tables.sql.
+
+  It would be nice if the declarations of these types were
+  generated automatically by the table definitions.   
+*/
+
+enum enum_stat_tables
+{
+  TABLE_STAT,
+  COLUMN_STAT,
+  INDEX_STAT,
+};
+
+enum enum_table_stat_col
+{
+  TABLE_STAT_DB_NAME,
+  TABLE_STAT_TABLE_NAME,
+  TABLE_STAT_CARDINALITY
+};
+
+enum enum_column_stat_col
+{
+  COLUMN_STAT_DB_NAME,
+  COLUMN_STAT_TABLE_NAME,
+  COLUMN_STAT_COLUMN_NAME,
+  COLUMN_STAT_MIN_VALUE,
+  COLUMN_STAT_MAX_VALUE,
+  COLUMN_STAT_NULLS_RATIO,
+  COLUMN_STAT_AVG_LENGTH,
+  COLUMN_STAT_AVG_FREQUENCY
+};
+
+enum enum_index_stat_col
+{
+  INDEX_STAT_DB_NAME,
+  INDEX_STAT_TABLE_NAME,
+  INDEX_STAT_INDEX_NAME,
+  INDEX_STAT_PREFIX_ARITY,
+  INDEX_STAT_AVG_FREQUENCY
+};
+
+
+class Columns_statistics;
+class Index_statistics;
+
+
+/* Statistical data on a table */
+
+class Table_statistics
+{
+
+public:
+  my_bool cardinality_is_null;      /* TRUE if the cardinality is unknown */
+  ha_rows cardinality;              /* Number of rows in the table        */
+  Column_statistics *column_stats;  /* Array of statistical data for columns */
+  Index_statistics *index_stats;    /* Array of statistical data for indexes */
+  ulong *idx_avg_frequency;   /* Array of records per key for index prefixes */                                       
+
+};
+
+
+/* Statistical data on a column */
+
+class Column_statistics
+{
+
+private:
+  static const uint Scale_factor_nulls_ratio= 100000;
+  static const uint Scale_factor_avg_length= 100000;
+  static const uint Scale_factor_avg_frequency= 100000;
+
+public:
+  /* 
+    Bitmap indicating  what statistical characteristics
+    are available for the column
+  */
+  uint32 column_stat_nulls;
+
+  /* Minimum value for the column */
+  Field *min_value; 
+  /* Maximum value for the column */   
+  Field *max_value;
+
+private:
+
+  /* 
+    The ratio Z/N multiplied by the scale factor Scale_factor_nulls_ratio,
+    where 
+      N is the total number of rows,
+      Z is the number of nulls in the column
+  */
+  ulong nulls_ratio;
+ 
+  /*
+    Average number of bytes occupied by the representation of a
+    value of the column in memory buffers such as join buffer
+    multiplied by the scale factor Scale_factor_avg_length.
+    CHAR values are stripped of trailing spaces.
+    Flexible values are stripped of their length prefixes.
+  */
+  ulong avg_length;
+
+  /*
+    The ratio N/D multiplied by the scale factor Scale_factor_avg_frequency,
+    where
+       N is the number of rows with not null value in the column,
+       D the number of distinct values among them
+  */
+  ulong avg_frequency;
+
+public:
+
+  void set_all_nulls()
+  {
+    column_stat_nulls= 
+      ((1 << (COLUMN_STAT_AVG_FREQUENCY-COLUMN_STAT_COLUMN_NAME))-1) <<
+      (COLUMN_STAT_COLUMN_NAME+1);
+  }
+
+  void set_not_null(uint stat_field_no)
+  {
+    column_stat_nulls&= ~(1 << stat_field_no);
+  }
+
+  bool is_null(uint stat_field_no)
+  {
+    return test(column_stat_nulls & (1 << stat_field_no));
+  }
+
+  double get_nulls_ratio()
+  {
+    return (double) nulls_ratio /  Scale_factor_nulls_ratio;
+  }
+
+  double get_avg_length()
+  {
+    return (double) avg_length / Scale_factor_avg_length;
+  }
+
+  double get_avg_frequency()
+  {
+    return (double) avg_frequency / Scale_factor_avg_frequency;
+  }
+
+  void set_nulls_ratio (double val)
+  {
+    nulls_ratio= (ulong) (val * Scale_factor_nulls_ratio);
+  }
+
+  void set_avg_length (double val)
+  {
+    avg_length= (ulong) (val * Scale_factor_avg_length);
+  }
+
+  void set_avg_frequency (double val)
+  {
+    avg_frequency= (ulong) (val * Scale_factor_avg_frequency);
+  }
+
+};
+
+
+/* Statistical data on an index prefixes */
+
+class Index_statistics
+{
+
+private:
+  static const uint Scale_factor_avg_frequency= 100000;
+  /*
+    The k-th element of this array contains the ratio N/D
+    multiplied by the scale factor Scale_factor_avg_frequency, 
+    where N is the number of index entries without nulls 
+    in the first k components, and D is the number of distinct
+    k-component prefixes among them 
+  */
+  ulong *avg_frequency;
+
+public:
+
+  void init_avg_frequency(ulong *ptr) { avg_frequency= ptr; }
+
+  bool avg_frequency_is_inited() { return avg_frequency != NULL; }
+
+  double get_avg_frequency(uint i)
+  {
+    return (double) avg_frequency[i] / Scale_factor_avg_frequency;
+  }
+
+  void set_avg_frequency(uint i, double val)
+  {
+    avg_frequency[i]= (ulong) (val * Scale_factor_avg_frequency);
+  }
+
+};
+
+#endif /* SQL_STATISTICS_H */

=== modified file 'sql/sql_table.cc'
--- a/sql/sql_table.cc	2012-09-18 12:14:19 +0000
+++ b/sql/sql_table.cc	2012-11-03 03:38:05 +0000
@@ -1886,6 +1886,17 @@
     }
   }
 
+  if (!in_bootstrap)
+  {
+    for (table= tables; table; table= table->next_local)
+    {
+      LEX_STRING db_name= { table->db, table->db_length };
+      LEX_STRING table_name= { table->table_name, table->table_name_length };
+      if (table->open_type == OT_BASE_ONLY || !find_temporary_table(thd, table))
+        (void) delete_statistics_for_table(thd, &db_name, &table_name);
+    }
+  }
+  
   mysql_ha_rm_tables(thd, tables);
 
   if (!drop_temporary)
@@ -1896,6 +1907,7 @@
                            MYSQL_OPEN_SKIP_TEMPORARY))
         DBUG_RETURN(true);
       for (table= tables; table; table= table->next_local)
+     
         tdc_remove_table(thd, TDC_RT_REMOVE_ALL, table->db, table->table_name,
                          false);
     }
@@ -5146,6 +5158,21 @@
          thd->calloc(sizeof(void*) * table->s->keys)) == NULL)
     DBUG_RETURN(1);
 
+  tmp_new_field_it.init(tmp_alter_info.create_list);
+  for (i= 0, f_ptr= table->field, tmp_new_field= tmp_new_field_it++;
+       (field= *f_ptr);
+       i++, f_ptr++, tmp_new_field= tmp_new_field_it++)
+  {
+    if (field->is_equal(tmp_new_field) == IS_EQUAL_NO &&
+        table->s->tmp_table == NO_TMP_TABLE)                             
+      (void) delete_statistics_for_column(thd, table, field);
+    else if (my_strcasecmp(system_charset_info,
+		           field->field_name,
+		           tmp_new_field->field_name))
+      (void) rename_column_in_stat_tables(thd, table, field,
+                                          tmp_new_field->field_name);
+  }    
+
   /*
     Use transformed info to evaluate possibility of in-place ALTER TABLE
     but use the preserved field to persist modifications.
@@ -5206,7 +5233,12 @@
     if (my_strcasecmp(system_charset_info,
 		      field->field_name,
 		      tmp_new_field->field_name))
-      field->flags|= FIELD_IS_RENAMED;      
+    {
+      field->flags|= FIELD_IS_RENAMED;
+      if (table->s->tmp_table == NO_TMP_TABLE)
+        rename_column_in_stat_tables(thd, table, field,
+                                     tmp_new_field->field_name);
+    }     
 
     /* Evaluate changes bitmap and send to check_if_incompatible_data() */
     if (!(tmp= field->is_equal(tmp_new_field)))
@@ -5309,6 +5341,8 @@
       field= table->field[key_part->fieldnr];
       field->flags|= FIELD_IN_ADD_INDEX;
     }
+    if (table->s->tmp_table == NO_TMP_TABLE)
+      (void) delete_statistics_for_index(thd, table, table_key);
     DBUG_PRINT("info", ("index changed: '%s'", table_key->name));
   }
   /*end of for (; table_key < table_key_end;) */
@@ -5566,6 +5600,8 @@
     }
     if (drop)
     {
+      if (table->s->tmp_table == NO_TMP_TABLE)
+        (void) delete_statistics_for_column(thd, table, field);
       drop_it.remove();
       /*
         ALTER TABLE DROP COLUMN always changes table data even in cases
@@ -5718,12 +5754,15 @@
     }
     if (drop)
     {
+      if (table->s->tmp_table == NO_TMP_TABLE)
+        (void) delete_statistics_for_index(thd, table, key_info);
       drop_it.remove();
       continue;
     }
 
     KEY_PART_INFO *key_part= key_info->key_part;
     key_parts.empty();
+    bool delete_index_stat= FALSE;
     for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
     {
       if (!key_part->field)
@@ -5746,7 +5785,10 @@
 	  break;
       }
       if (!cfield)
+      {
+        delete_index_stat= TRUE;
 	continue;				// Field is removed
+      }
       key_part_length= key_part->length;
       if (cfield->field)			// Not new field
       {
@@ -5788,6 +5830,8 @@
                                             strlen(cfield->field_name),
 					    key_part_length));
     }
+    if (delete_index_stat && table->s->tmp_table == NO_TMP_TABLE)
+      (void) delete_statistics_for_index(thd, table, key_info);
     if (key_parts.elements)
     {
       KEY_CREATE_INFO key_create_info;
@@ -5967,6 +6011,9 @@
   enum ha_extra_function extra_func= thd->locked_tables_mode
                                        ? HA_EXTRA_NOT_USED
                                        : HA_EXTRA_FORCE_REOPEN;
+  LEX_STRING old_db_name= { table_list->db, table_list->db_length };
+  LEX_STRING old_table_name= { table_list->table_name,
+                               table_list->table_name_length };
   DBUG_ENTER("mysql_alter_table");
 
   /*
@@ -6285,6 +6332,12 @@
       else
       {
         *fn_ext(new_name)=0;
+
+        LEX_STRING new_db_name= { new_db, strlen(new_db) };
+        LEX_STRING new_table_name= { new_alias, strlen(new_alias) };
+        (void) rename_table_in_stat_tables(thd, &old_db_name, &old_table_name,
+                                           &new_db_name, &new_table_name);
+
         if (mysql_rename_table(old_db_type,db,table_name,new_db,new_alias, 0))
           error= -1;
         else if (Table_triggers_list::change_table_name(thd, db,
@@ -7029,6 +7082,15 @@
     table is renamed and the SE is also changed, then an intermediate table
     is created and the additional call will not take place.
   */
+
+  if (new_name != table_name || new_db != db)
+  {
+    LEX_STRING new_db_name= { new_db, strlen(new_db) };
+    LEX_STRING new_table_name= { new_name, strlen(new_name) };
+    (void) rename_table_in_stat_tables(thd, &old_db_name, &old_table_name,
+                                        &new_db_name, &new_table_name);
+  }
+
   if (need_copy_table == ALTER_TABLE_METADATA_ONLY)
   {
     DBUG_ASSERT(new_db_type == old_db_type);

=== modified file 'sql/sql_yacc.yy'
--- a/sql/sql_yacc.yy	2012-09-05 15:23:51 +0000
+++ b/sql/sql_yacc.yy	2012-11-03 03:38:05 +0000
@@ -1594,7 +1594,12 @@
         show describe load alter optimize keycache preload flush
         reset purge begin commit rollback savepoint release
         slave master_def master_defs master_file_def slave_until_opts
-        repair analyze check start checksum
+        repair analyze
+        analyze_table_list analyze_table_elem_spec
+        opt_persistent_stat_clause persistent_stat_spec
+        persistent_column_stat_spec persistent_index_stat_spec
+        table_column_list table_index_list table_index_name
+        check start checksum
         field_list field_list_item field_spec kill column_def key_def
         keycache_list keycache_list_or_parts assign_to_keycache
         assign_to_keycache_parts
@@ -7229,7 +7234,7 @@
             /* Will be overriden during execution. */
             YYPS->m_lock_type= TL_UNLOCK;
           }
-          table_list
+          analyze_table_list
           {
             THD *thd= YYTHD;
             LEX* lex= thd->lex;
@@ -7240,6 +7245,93 @@
           }
         ;
 
+analyze_table_list:
+          analyze_table_elem_spec
+        | analyze_table_list ',' analyze_table_elem_spec
+        ;
+
+analyze_table_elem_spec:
+          table_name opt_persistent_stat_clause
+        ;
+
+opt_persistent_stat_clause:
+          /* empty */
+          {}        
+        | PERSISTENT_SYM FOR_SYM persistent_stat_spec  
+          {}
+        ;
+
+persistent_stat_spec:
+          ALL
+          {}
+        | COLUMNS persistent_column_stat_spec INDEXES persistent_index_stat_spec
+          {}
+
+persistent_column_stat_spec:
+          ALL {}
+        | '('
+          { 
+            THD *thd= YYTHD;
+            LEX* lex= thd->lex;
+            lex->column_list= new List<LEX_STRING>;
+            if (lex->column_list == NULL)
+              MYSQL_YYABORT;
+          }
+          table_column_list
+          ')' 
+        ;
+ 
+persistent_index_stat_spec:
+          ALL {}
+        | '('
+          { 
+            THD *thd= YYTHD;
+            LEX* lex= thd->lex;
+            lex->index_list= new List<LEX_STRING>;
+            if (lex->index_list == NULL)
+              MYSQL_YYABORT;
+          }
+          table_index_list
+          ')' 
+        ;
+
+table_column_list:
+          /* empty */
+          {}
+        | ident 
+          {
+            Lex->column_list->push_back((LEX_STRING*)
+            sql_memdup(&$1, sizeof(LEX_STRING)));
+          }
+        | table_column_list ',' ident
+          {
+            Lex->column_list->push_back((LEX_STRING*)
+            sql_memdup(&$3, sizeof(LEX_STRING)));
+          }
+        ;
+
+table_index_list:
+          /* empty */
+          {}
+        | table_index_name 
+        | table_index_list ',' table_index_name
+        ;
+
+table_index_name:
+          ident
+          {
+            Lex->index_list->push_back(
+              (LEX_STRING*) sql_memdup(&$1, sizeof(LEX_STRING)));
+          }
+        |
+          PRIMARY_SYM
+          {
+            LEX_STRING str= {(char*) "PRIMARY", 7};
+            Lex->index_list->push_back(
+              (LEX_STRING*) sql_memdup(&str, sizeof(LEX_STRING)));
+          }  
+        ;  
+
 binlog_base64_event:
           BINLOG_SYM TEXT_STRING_sys
           {

=== modified file 'sql/structs.h'
--- a/sql/structs.h	2012-03-02 23:03:20 +0000
+++ b/sql/structs.h	2012-07-27 00:50:08 +0000
@@ -29,6 +29,7 @@
 
 struct TABLE;
 class Field;
+class Index_statistics;
 
 class THD;
 
@@ -96,6 +97,11 @@
   uint  block_size;
   uint  name_length;
   enum  ha_key_alg algorithm;
+  /* 
+    The flag is on if statistical data for the index prefixes
+    has to be taken from the system statistical tables.
+  */
+  bool is_statistics_from_stat_tables;
   /*
     Note that parser is used when the table is opened for use, and
     parser_name is used when the table is being created.
@@ -115,6 +121,18 @@
     For temporary heap tables this member is NULL.
   */
   ulong *rec_per_key;
+
+  /*
+    This structure is used for statistical data on the index
+    that has been read from the statistical table index_stat
+  */ 
+  Index_statistics *read_stats;
+  /*
+    This structure is used for statistical data on the index that
+    is collected by the function collect_statistics_for_table
+  */
+  Index_statistics *collected_stats;
+ 
   union {
     int  bdb_return_if_eq;
   } handler;
@@ -123,6 +141,9 @@
   /** reference to the list of options or NULL */
   engine_option_value *option_list;
   ha_index_option_struct *option_struct;                  /* structure with parsed options */
+
+  double real_rec_per_key(uint i);
+
 } KEY;
 
 

=== modified file 'sql/sys_vars.cc'
--- a/sql/sys_vars.cc	2012-10-18 21:33:06 +0000
+++ b/sql/sys_vars.cc	2012-11-03 03:38:05 +0000
@@ -3791,6 +3791,15 @@
        SESSION_VAR(progress_report_time), CMD_LINE(REQUIRED_ARG),
        VALID_RANGE(0, UINT_MAX), DEFAULT(56), BLOCK_SIZE(1));
 
+const char *use_stat_tables_modes[] =
+           {"NEVER", "COMPLEMENTARY", "PREFERABLY", 0};
+static Sys_var_enum Sys_optimizer_use_stat_tables(
+       "use_stat_tables",
+       "Specifies how to use system statistics tables. Possible values are "
+       "NEVER, COMPLEMENTARY, PREVERABLY",
+       SESSION_VAR(use_stat_tables), CMD_LINE(REQUIRED_ARG),
+       use_stat_tables_modes, DEFAULT(0));
+
 static Sys_var_mybool Sys_no_thread_alarm(
        "debug_no_thread_alarm",
        "Disable system thread alarm calls. Disabling it may be useful "

=== modified file 'sql/table.cc'
--- a/sql/table.cc	2012-10-18 21:33:06 +0000
+++ b/sql/table.cc	2012-11-03 03:38:05 +0000
@@ -39,6 +39,7 @@
 #include "my_bit.h"
 #include "sql_select.h"
 #include "sql_derived.h"
+#include "sql_statistics.h"
 #include "mdl.h"                 // MDL_wait_for_graph_visitor
 
 /* INFORMATION_SCHEMA name */
@@ -544,6 +545,12 @@
              my_tolower(ci, name[2]) == 'm' &&
              my_tolower(ci, name[3]) == 'e') ||
 
+            /* one of mysql.*_stat tables */
+            (my_tolower(ci, name[length-4]) == 's' &&
+             my_tolower(ci, name[length-3]) == 't' &&
+             my_tolower(ci, name[length-2]) == 'a' &&
+             my_tolower(ci, name[length-1]) == 't') ||
+           
             /* mysql.event table */
             (my_tolower(ci, name[0]) == 'e' &&
              my_tolower(ci, name[1]) == 'v' &&
@@ -753,7 +760,7 @@
   uchar forminfo[288];
   uchar *record;
   uchar *disk_buff, *strpos, *null_flags, *null_pos;
-  ulong pos, record_offset;
+  ulong pos, record_offset; 
   ulong *rec_per_key= NULL;
   ulong rec_buff_length;
   handler *handler_file= 0;
@@ -5971,6 +5978,7 @@
   keyinfo->algorithm= HA_KEY_ALG_UNDEF;
   keyinfo->flags= HA_GENERATED_KEY;
   keyinfo->ext_key_flags= keyinfo->flags;
+  keyinfo->is_statistics_from_stat_tables= FALSE;
   if (unique)
     keyinfo->flags|= HA_NOSAME;
   sprintf(buf, "key%i", key);
@@ -5981,6 +5989,8 @@
   if (!keyinfo->rec_per_key)
     return TRUE;
   bzero(keyinfo->rec_per_key, sizeof(ulong)*key_parts);
+  keyinfo->read_stats= NULL;
+  keyinfo->collected_stats= NULL;
 
   for (i= 0; i < key_parts; i++)
   {
@@ -6671,6 +6681,7 @@
   {
     table->file->stats.records= ((select_union*)derived->result)->records;
     set_if_bigger(table->file->stats.records, 2);
+    table->used_stat_records= table->file->stats.records;
   }
   else
     error= table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
@@ -6767,6 +6778,14 @@
 }  
 
 
+double KEY::real_rec_per_key(uint i)
+{ 
+  if (rec_per_key == 0)
+    return 0;
+  return (is_statistics_from_stat_tables ?
+          read_stats->get_avg_frequency(i) : (double) rec_per_key[i]);
+}
+
 /*****************************************************************************
 ** Instansiate templates
 *****************************************************************************/

=== modified file 'sql/table.h'
--- a/sql/table.h	2012-10-18 21:33:06 +0000
+++ b/sql/table.h	2012-11-03 03:38:05 +0000
@@ -45,6 +45,7 @@
 class ACL_internal_schema_access;
 class ACL_internal_table_access;
 class Field;
+class Table_statistics;
 
 /*
   Used to identify NESTED_JOIN structures within a join (applicable only to
@@ -577,6 +578,15 @@
   KEY  *key_info;			/* data of keys in database */
   uint	*blob_field;			/* Index to blobs in Field arrray*/
 
+  bool stats_can_be_read;      /* Memory for statistical data is allocated */
+  bool stats_is_read;          /* Statistical data for table has been read
+                                  from statistical tables */   
+  /*
+    This structure is used for statistical data on the table
+    that has been read from the statistical table table_stat
+  */ 
+  Table_statistics *read_stats;
+
   uchar	*default_values;		/* row with default values */
   LEX_STRING comment;			/* Comment about table */
   CHARSET_INFO *table_charset;		/* Default charset of string fields */
@@ -1007,6 +1017,15 @@
   */
   query_id_t	query_id;
 
+  /*
+    This structure is used for statistical data on the table that
+    is collected by the function collect_statistics_for_table
+  */
+  Table_statistics *collected_stats;
+
+  /* The estimate of the number of records in the table used by optimizer */ 
+  ha_rows used_stat_records;
+
   /* 
     For each key that has quick_keys.is_set(key) == TRUE: estimate of #records
     and max #key parts that range access would use.
@@ -1258,6 +1277,7 @@
   bool update_const_key_parts(COND *conds);
   uint actual_n_key_parts(KEY *keyinfo);
   ulong actual_key_flags(KEY *keyinfo);
+  inline ha_rows stat_records() { return used_stat_records; }
 };
 
 



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