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drop table if exists t1,t2;
create table t1 (a int not null primary key, b int not null,c int not null, key(b,c));
insert into t1 values (1,2,2),(2,2,3),(3,2,4),(4,2,4);
create table t2 type=isam select * from t1;
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize status OK
check table t1,t2;
Table Op Msg_type Msg_text
test.t1 check status OK
test.t2 check error The handler for the table doesn't support check/repair
repair table t1,t2;
Table Op Msg_type Msg_text
test.t1 repair status OK
test.t2 repair error The handler for the table doesn't support check/repair
check table t2,t1;
Table Op Msg_type Msg_text
test.t2 check error The handler for the table doesn't support check/repair
test.t1 check status OK
lock tables t1 write;
check table t2,t1;
Table Op Msg_type Msg_text
test.t2 check error Table 't2' was not locked with LOCK TABLES
test.t1 check status OK
show columns from t1;
Field Type Null Key Default Extra
a int(11) PRI 0
b int(11) MUL 0
c int(11) 0
show full columns from t1;
Field Type Null Key Default Extra Privileges
a int(11) PRI 0 select,insert,update,references
b int(11) MUL 0 select,insert,update,references
c int(11) 0 select,insert,update,references
show index from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Comment
t1 0 PRIMARY 1 a A 4 NULL NULL
t1 1 b 1 b A 1 NULL NULL
t1 1 b 2 c A 4 NULL NULL
drop table t1,t2;
create table t1 (a int not null primary key, b int not null,c int not null, key(b,c));
insert into t1 values (1,2,2),(2,2,3),(3,2,4),(4,2,4);
check table t1 type=fast;
Table Op Msg_type Msg_text
test.t1 check status Table is already up to date
check table t1 type=fast;
Table Op Msg_type Msg_text
test.t1 check status Table is already up to date
check table t1 type=changed;
Table Op Msg_type Msg_text
test.t1 check status OK
insert into t1 values (5,5,5);
check table t1 type=changed;
Table Op Msg_type Msg_text
test.t1 check status OK
check table t1 type=medium;
Table Op Msg_type Msg_text
test.t1 check status OK
check table t1 type=extended;
Table Op Msg_type Msg_text
test.t1 check status OK
show index from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Comment
t1 0 PRIMARY 1 a A 5 NULL NULL
t1 1 b 1 b A 1 NULL NULL
t1 1 b 2 c A 5 NULL NULL
insert into t1 values (5,5,5);
Duplicate entry '5' for key 1
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize status OK
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize status Table is already up to date
drop table t1;
show variables like "wait_timeout%";
Variable_name Value
wait_timeout 28800
show variables like "this_doesn't_exists%";
Variable_name Value
show table status from test like "this_doesn't_exists%";
Name Type Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Create_options Comment
show databases;
Database
mysql
test
show databases like "test%";
Database (test%)
test
create table t1 (f1 int not null, f2 int not null, f3 int not null, f4 int not null, primary key(f1,f2,f3,f4));
insert into t1 values (1,1,1,0),(1,1,2,0),(1,1,3,0),(1,2,1,0),(1,2,2,0),(1,2,3,0),(1,3,1,0),(1,3,2,0),(1,3,3,0),(1,1,1,1),(1,1,2,1),(1,1,3,1),(1,2,1,1),(1,2,2,1),(1,2,3,1),(1,3,1,1),(1,3,2,1),(1,3,3,1);
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
show index from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Comment
t1 0 PRIMARY 1 f1 A 1 NULL NULL
t1 0 PRIMARY 2 f2 A 3 NULL NULL
t1 0 PRIMARY 3 f3 A 9 NULL NULL
t1 0 PRIMARY 4 f4 A 18 NULL NULL
repair table t1;
Table Op Msg_type Msg_text
test.t1 repair status OK
show index from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Comment
t1 0 PRIMARY 1 f1 A 1 NULL NULL
t1 0 PRIMARY 2 f2 A 3 NULL NULL
t1 0 PRIMARY 3 f3 A 9 NULL NULL
t1 0 PRIMARY 4 f4 A 18 NULL NULL
drop table t1;
create temporary table t1 (a int not null);
show create table t1;
Table Create Table
t1 CREATE TEMPORARY TABLE `t1` (
`a` int(11) NOT NULL default '0'
) TYPE=MyISAM
alter table t1 rename t2;
show create table t2;
Table Create Table
t2 CREATE TEMPORARY TABLE `t2` (
`a` int(11) NOT NULL default '0'
) TYPE=MyISAM
drop table t2;
create table t1 (
test_set set( 'val1', 'val2', 'val3' ) not null default '',
name char(20) default 'O''Brien'
) comment = 'it\'s a table' ;
show create table t1 ;
Table Create Table
t1 CREATE TABLE `t1` (
`test_set` set('val1','val2','val3') NOT NULL default '',
`name` char(20) default 'O''Brien'
) TYPE=MyISAM COMMENT='it''s a table'
drop table t1;
create table t1 (a int not null, unique aa (a));
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
UNIQUE KEY `aa` (`a`)
) TYPE=MyISAM
drop table t1;
create table t1 (a int not null, primary key (a));
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
PRIMARY KEY (`a`)
) TYPE=MyISAM
drop table t1;
flush tables;
show open tables;
Database Table In_use Name_locked
create table t1(n int);
insert into t1 values (1);
show open tables;
Database Table In_use Name_locked
test t1 0 0
drop table t1;
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