drop table if exists t1,t2,t3,t4;
drop database if exists mysqltest;
create table t1 (v varchar(16384)) engine=innodb;
drop table t1;
create table t1 (a char(1), b char(1), key(a, b)) engine=innodb;
insert into t1 values ('8', '6'), ('4', '7');
select min(a) from t1;
min(a)
4
select min(b) from t1 where a='8';
min(b)
6
drop table t1;
CREATE TABLE t1 ( `a` int(11) NOT NULL auto_increment, `b` int(11) default NULL,PRIMARY KEY  (`a`),UNIQUE KEY `b` (`b`)) ENGINE=innodb;
insert into t1 (b) values (1);
replace into t1 (b) values (2), (1), (3);
select * from t1;
a	b
3	1
2	2
4	3
truncate table t1;
insert into t1 (b) values (1);
replace into t1 (b) values (2);
replace into t1 (b) values (1);
replace into t1 (b) values (3);
select * from t1;
a	b
3	1
2	2
4	3
drop table t1;
create table t1 (rowid int not null auto_increment, val int not null,primary
key (rowid), unique(val)) engine=innodb;
replace into t1 (val) values ('1'),('2');
replace into t1 (val) values ('1'),('2');
insert into t1 (val) values ('1'),('2');
ERROR 23000: Duplicate entry '1' for key 'val'
select * from t1;
rowid	val
3	1
4	2
drop table t1;
create table t1 (a int not null auto_increment primary key, val int) engine=InnoDB;
insert into t1 (val) values (1);
update t1 set a=2 where a=1;
insert into t1 (val) values (1);
ERROR 23000: Duplicate entry '2' for key 'PRIMARY'
select * from t1;
a	val
2	1
drop table t1;
CREATE TABLE t1 (GRADE DECIMAL(4) NOT NULL, PRIMARY KEY (GRADE)) ENGINE=INNODB;
INSERT INTO t1 (GRADE) VALUES (151),(252),(343);
SELECT GRADE  FROM t1 WHERE GRADE > 160 AND GRADE < 300;
GRADE
252
SELECT GRADE  FROM t1 WHERE GRADE= 151;
GRADE
151
DROP TABLE t1;
create table t1 (f1 varchar(10), f2 varchar(10), primary key (f1,f2)) engine=innodb;
create table t2 (f3 varchar(10), f4 varchar(10), key (f4)) engine=innodb;
insert into t2 values ('aa','cc');
insert into t1 values ('aa','bb'),('aa','cc');
delete t1 from t1,t2 where f1=f3 and f4='cc';
select * from t1;
f1	f2
drop table t1,t2;
CREATE TABLE t1 (
id INTEGER NOT NULL AUTO_INCREMENT, PRIMARY KEY (id)
) ENGINE=InnoDB;
CREATE TABLE t2 (
id INTEGER NOT NULL,
FOREIGN KEY (id) REFERENCES t1 (id)
) ENGINE=InnoDB;
INSERT INTO t1 (id) VALUES (NULL);
SELECT * FROM t1;
id
1
TRUNCATE t1;
INSERT INTO t1 (id) VALUES (NULL);
SELECT * FROM t1;
id
1
DELETE FROM t1;
TRUNCATE t1;
INSERT INTO t1 (id) VALUES (NULL);
SELECT * FROM t1;
id
1
DROP TABLE t2, t1;
CREATE TABLE t1
(
id INT PRIMARY KEY
) ENGINE=InnoDB;
CREATE TEMPORARY TABLE t2
(
id INT NOT NULL PRIMARY KEY,
b INT,
FOREIGN KEY (b) REFERENCES test.t1(id)
) ENGINE=InnoDB;
Got one of the listed errors
DROP TABLE t1;
create table t1 (col1 varchar(2000), index (col1(767)))
character set = latin1 engine = innodb;
create table t2 (col1 char(255), index (col1))
character set = latin1 engine = innodb;
create table t3 (col1 binary(255), index (col1))
character set = latin1 engine = innodb;
create table t4 (col1 varchar(767), index (col1))
character set = latin1 engine = innodb;
create table t5 (col1 varchar(767) primary key)
character set = latin1 engine = innodb;
create table t6 (col1 varbinary(767) primary key)
character set = latin1 engine = innodb;
create table t7 (col1 text, index(col1(767)))
character set = latin1 engine = innodb;
create table t8 (col1 blob, index(col1(767)))
character set = latin1 engine = innodb;
create table t9 (col1 varchar(512), col2 varchar(512), index(col1, col2))
character set = latin1 engine = innodb;
show create table t9;
Table	Create Table
t9	CREATE TABLE `t9` (
  `col1` varchar(512) DEFAULT NULL,
  `col2` varchar(512) DEFAULT NULL,
  KEY `col1` (`col1`,`col2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1, t2, t3, t4, t5, t6, t7, t8, t9;
create table t1 (col1 varchar(768), index(col1))
character set = latin1 engine = innodb;
Warnings:
Warning	1071	Specified key was too long; max key length is 767 bytes
create table t2 (col1 varbinary(768), index(col1))
character set = latin1 engine = innodb;
Warnings:
Warning	1071	Specified key was too long; max key length is 767 bytes
create table t3 (col1 text, index(col1(768)))
character set = latin1 engine = innodb;
Warnings:
Warning	1071	Specified key was too long; max key length is 767 bytes
create table t4 (col1 blob, index(col1(768)))
character set = latin1 engine = innodb;
Warnings:
Warning	1071	Specified key was too long; max key length is 767 bytes
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `col1` varchar(768) DEFAULT NULL,
  KEY `col1` (`col1`(767))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1, t2, t3, t4;
create table t1 (col1 varchar(768) primary key)
character set = latin1 engine = innodb;
ERROR 42000: Specified key was too long; max key length is 767 bytes
create table t2 (col1 varbinary(768) primary key)
character set = latin1 engine = innodb;
ERROR 42000: Specified key was too long; max key length is 767 bytes
create table t3 (col1 text, primary key(col1(768)))
character set = latin1 engine = innodb;
ERROR 42000: Specified key was too long; max key length is 767 bytes
create table t4 (col1 blob, primary key(col1(768)))
character set = latin1 engine = innodb;
ERROR 42000: Specified key was too long; max key length is 767 bytes
CREATE TABLE t1
(
id INT PRIMARY KEY
) ENGINE=InnoDB;
CREATE TABLE t2
(
v INT,
CONSTRAINT c1 FOREIGN KEY (v) REFERENCES t1(id)
) ENGINE=InnoDB;
INSERT INTO t2 VALUES(2);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c1` FOREIGN KEY (`v`) REFERENCES `t1` (`id`))
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1);
DELETE FROM t1 WHERE id = 1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c1` FOREIGN KEY (`v`) REFERENCES `t1` (`id`))
DROP TABLE t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
SET FOREIGN_KEY_CHECKS=0;
DROP TABLE t1;
SET FOREIGN_KEY_CHECKS=1;
INSERT INTO t2 VALUES(3);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c1` FOREIGN KEY (`v`) REFERENCES `t1` (`id`))
DROP TABLE t2;
create table t1(a int not null) engine=innodb DEFAULT CHARSET=latin1;
insert into t1 values (1),(2);
set autocommit=0;
checksum table t1;
Table	Checksum
test.t1	1531596814
insert into t1 values(3);
checksum table t1;
Table	Checksum
test.t1	1531596814
commit;
checksum table t1;
Table	Checksum
test.t1	2050879373
commit;
drop table t1;
create table t1(a int not null) engine=innodb DEFAULT CHARSET=latin1;
insert into t1 values (1),(2);
set autocommit=1;
checksum table t1;
Table	Checksum
test.t1	1531596814
set autocommit=1;
insert into t1 values(3);
checksum table t1;
Table	Checksum
test.t1	2050879373
drop table t1;
set foreign_key_checks=0;
create table t2 (a int primary key, b int, foreign key (b) references t1(a)) engine = innodb;
create table t1(a char(10) primary key, b varchar(20)) engine = innodb;
ERROR HY000: Can't create table 'test.t1' (errno: 150)
set foreign_key_checks=1;
drop table t2;
set foreign_key_checks=0;
create table t1(a varchar(10) primary key) engine = innodb DEFAULT CHARSET=latin1;
create table t2 (a varchar(10), foreign key (a) references t1(a)) engine = innodb DEFAULT CHARSET=utf8;
ERROR HY000: Can't create table 'test.t2' (errno: 150)
set foreign_key_checks=1;
drop table t1;
set foreign_key_checks=0;
create table t2 (a varchar(10), foreign key (a) references t1(a)) engine = innodb;
create table t1(a varchar(10) primary key) engine = innodb;
alter table t1 modify column a int;
Got one of the listed errors
set foreign_key_checks=1;
drop table t2,t1;
set foreign_key_checks=0;
create table t2 (a varchar(10), foreign key (a) references t1(a)) engine = innodb DEFAULT CHARSET=latin1;
create table t1(a varchar(10) primary key) engine = innodb DEFAULT CHARSET=latin1;
alter table t1 convert to character set utf8;
set foreign_key_checks=1;
drop table t2,t1;
set foreign_key_checks=0;
create table t2 (a varchar(10), foreign key (a) references t1(a)) engine = innodb DEFAULT CHARSET=latin1;
create table t3(a varchar(10) primary key) engine = innodb DEFAULT CHARSET=utf8;
rename table t3 to t1;
ERROR HY000: Error on rename of './test/t3' to './test/t1' (errno: 150)
set foreign_key_checks=1;
drop table t2,t3;
create table t1(a int primary key) row_format=redundant engine=innodb;
create table t2(a int primary key,constraint foreign key(a)references t1(a)) row_format=compact engine=innodb;
create table t3(a int primary key) row_format=compact engine=innodb;
create table t4(a int primary key,constraint foreign key(a)references t3(a)) row_format=redundant engine=innodb;
insert into t1 values(1);
insert into t3 values(1);
insert into t2 values(2);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
insert into t4 values(2);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
insert into t2 values(1);
insert into t4 values(1);
update t1 set a=2;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
update t2 set a=2;
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
update t3 set a=2;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
update t4 set a=2;
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
truncate t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
truncate t3;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
truncate t2;
truncate t4;
truncate t1;
truncate t3;
drop table t4,t3,t2,t1;
create table t1 (a varchar(255) character set utf8,
b varchar(255) character set utf8,
c varchar(255) character set utf8,
d varchar(255) character set utf8,
key (a,b,c,d)) engine=innodb;
drop table t1;
create table t1 (a varchar(255) character set utf8,
b varchar(255) character set utf8,
c varchar(255) character set utf8,
d varchar(255) character set utf8,
e varchar(255) character set utf8,
key (a,b,c,d,e)) engine=innodb;
ERROR 42000: Specified key was too long; max key length is 3072 bytes
create table t1 (s1 varbinary(2),primary key (s1)) engine=innodb;
create table t2 (s1 binary(2),primary key (s1)) engine=innodb;
create table t3 (s1 varchar(2) binary,primary key (s1)) engine=innodb;
create table t4 (s1 char(2) binary,primary key (s1)) engine=innodb;
insert into t1 values (0x41),(0x4120),(0x4100);
insert into t2 values (0x41),(0x4120),(0x4100);
ERROR 23000: Duplicate entry 'A' for key 'PRIMARY'
insert into t2 values (0x41),(0x4120);
insert into t3 values (0x41),(0x4120),(0x4100);
ERROR 23000: Duplicate entry 'A ' for key 'PRIMARY'
insert into t3 values (0x41),(0x4100);
insert into t4 values (0x41),(0x4120),(0x4100);
ERROR 23000: Duplicate entry 'A' for key 'PRIMARY'
insert into t4 values (0x41),(0x4100);
select hex(s1) from t1;
hex(s1)
41
4100
4120
select hex(s1) from t2;
hex(s1)
4100
4120
select hex(s1) from t3;
hex(s1)
4100
41
select hex(s1) from t4;
hex(s1)
4100
41
drop table t1,t2,t3,t4;
create table t1 (a int primary key,s1 varbinary(3) not null unique) engine=innodb;
create table t2 (s1 binary(2) not null, constraint c foreign key(s1) references t1(s1) on update cascade) engine=innodb;
insert into t1 values(1,0x4100),(2,0x41),(3,0x4120),(4,0x42);
insert into t2 values(0x42);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c` FOREIGN KEY (`s1`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
insert into t2 values(0x41);
select hex(s1) from t2;
hex(s1)
4100
update t1 set s1=0x123456 where a=2;
select hex(s1) from t2;
hex(s1)
4100
update t1 set s1=0x12 where a=1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c` FOREIGN KEY (`s1`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
update t1 set s1=0x12345678 where a=1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c` FOREIGN KEY (`s1`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
update t1 set s1=0x123457 where a=1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c` FOREIGN KEY (`s1`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
update t1 set s1=0x1220 where a=1;
select hex(s1) from t2;
hex(s1)
1220
update t1 set s1=0x1200 where a=1;
select hex(s1) from t2;
hex(s1)
1200
update t1 set s1=0x4200 where a=1;
select hex(s1) from t2;
hex(s1)
4200
delete from t1 where a=1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c` FOREIGN KEY (`s1`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
delete from t1 where a=2;
update t2 set s1=0x4120;
delete from t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c` FOREIGN KEY (`s1`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
delete from t1 where a!=3;
select a,hex(s1) from t1;
a	hex(s1)
3	4120
select hex(s1) from t2;
hex(s1)
4120
drop table t2,t1;
create table t1 (a int primary key,s1 varchar(2) binary not null unique) engine=innodb;
create table t2 (s1 char(2) binary not null, constraint c foreign key(s1) references t1(s1) on update cascade) engine=innodb;
insert into t1 values(1,0x4100),(2,0x41);
insert into t2 values(0x41);
select hex(s1) from t2;
hex(s1)
41
update t1 set s1=0x1234 where a=1;
select hex(s1) from t2;
hex(s1)
41
update t1 set s1=0x12 where a=2;
select hex(s1) from t2;
hex(s1)
12
delete from t1 where a=1;
delete from t1 where a=2;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `c` FOREIGN KEY (`s1`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
select a,hex(s1) from t1;
a	hex(s1)
2	12
select hex(s1) from t2;
hex(s1)
12
drop table t2,t1;
CREATE TABLE t1(a INT, PRIMARY KEY(a)) ENGINE=InnoDB;
CREATE TABLE t2(a INT) ENGINE=InnoDB;
ALTER TABLE t2 ADD FOREIGN KEY (a) REFERENCES t1(a);
ALTER TABLE t2 DROP FOREIGN KEY t2_ibfk_1;
ALTER TABLE t2 ADD CONSTRAINT t2_ibfk_0 FOREIGN KEY (a) REFERENCES t1(a);
ALTER TABLE t2 DROP FOREIGN KEY t2_ibfk_0;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(11) DEFAULT NULL,
  KEY `t2_ibfk_0` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t2,t1;
create table t1(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
insert into t1(a) values (1),(2),(3);
commit;
set autocommit = 0;
update t1 set b = 5 where a = 2;
create trigger t1t before insert on t1 for each row begin set NEW.b = NEW.a * 10 + 5, NEW.c = NEW.a / 10; end |
set autocommit = 0;
insert into t1(a) values (10),(20),(30),(40),(50),(60),(70),(80),(90),(100),
(11),(21),(31),(41),(51),(61),(71),(81),(91),(101),
(12),(22),(32),(42),(52),(62),(72),(82),(92),(102),
(13),(23),(33),(43),(53),(63),(73),(83),(93),(103),
(14),(24),(34),(44),(54),(64),(74),(84),(94),(104);
commit;
commit;
drop trigger t1t;
drop table t1;
create table t1(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
create table t2(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
create table t3(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
create table t4(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
create table t5(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
insert into t1(a) values (1),(2),(3);
insert into t2(a) values (1),(2),(3);
insert into t3(a) values (1),(2),(3);
insert into t4(a) values (1),(2),(3);
insert into t3(a) values (5),(7),(8);
insert into t4(a) values (5),(7),(8);
insert into t5(a) values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12);
create trigger t1t before insert on t1 for each row begin 
INSERT INTO t2 SET a = NEW.a;
end |
create trigger t2t before insert on t2 for each row begin
DELETE FROM t3 WHERE a = NEW.a;
end |
create trigger t3t before delete on t3 for each row begin  
UPDATE t4 SET b = b + 1 WHERE a = OLD.a;
end |
create trigger t4t before update on t4 for each row begin
UPDATE t5 SET b = b + 1 where a = NEW.a;
end |
commit;
set autocommit = 0;
update t1 set b = b + 5 where a = 1;
update t2 set b = b + 5 where a = 1;
update t3 set b = b + 5 where a = 1;
update t4 set b = b + 5 where a = 1;
insert into t5(a) values(20);
set autocommit = 0;
insert into t1(a) values(7);
insert into t2(a) values(8);
delete from t2 where a = 3;
update t4 set b = b + 1 where a = 3;
commit;
drop trigger t1t;
drop trigger t2t;
drop trigger t3t;
drop trigger t4t;
drop table t1, t2, t3, t4, t5;
CREATE TABLE t1 (
field1 varchar(8) NOT NULL DEFAULT '',
field2 varchar(8) NOT NULL DEFAULT '',
PRIMARY KEY  (field1, field2)
) ENGINE=InnoDB;
CREATE TABLE t2 (
field1 varchar(8) NOT NULL DEFAULT '' PRIMARY KEY,
FOREIGN KEY (field1) REFERENCES t1 (field1)
ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB;
INSERT INTO t1 VALUES ('old', 'somevalu');
INSERT INTO t1 VALUES ('other', 'anyvalue');
INSERT INTO t2 VALUES ('old');
INSERT INTO t2 VALUES ('other');
UPDATE t1 SET field1 = 'other' WHERE field2 = 'somevalu';
ERROR 23000: Upholding foreign key constraints for table 't1', entry 'other-somevalu', key 1 would lead to a duplicate entry
DROP TABLE t2;
DROP TABLE t1;
create table t1 (
c1 bigint not null,
c2 bigint not null,
primary key (c1),
unique  key (c2)
) engine=innodb;
create table t2 (
c1 bigint not null,
primary key (c1)
) engine=innodb;
alter table t1 add constraint c2_fk foreign key (c2)
references t2(c1) on delete cascade;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` bigint(20) NOT NULL,
  `c2` bigint(20) NOT NULL,
  PRIMARY KEY (`c1`),
  UNIQUE KEY `c2` (`c2`),
  CONSTRAINT `c2_fk` FOREIGN KEY (`c2`) REFERENCES `t2` (`c1`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 drop foreign key c2_fk;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` bigint(20) NOT NULL,
  `c2` bigint(20) NOT NULL,
  PRIMARY KEY (`c1`),
  UNIQUE KEY `c2` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1, t2;
create table t1(a date) engine=innodb;
create table t2(a date, key(a)) engine=innodb;
insert into t1 values('2005-10-01');
insert into t2 values('2005-10-01');
select * from t1, t2
where t2.a between t1.a - interval 2 day and t1.a + interval 2 day;
a	a
2005-10-01	2005-10-01
drop table t1, t2;
create table t1 (id int not null, f_id int not null, f int not null,
primary key(f_id, id)) engine=innodb;
create table t2 (id int not null,s_id int not null,s varchar(200),
primary key(id)) engine=innodb;
INSERT INTO t1 VALUES (8, 1, 3);
INSERT INTO t1 VALUES (1, 2, 1);
INSERT INTO t2 VALUES (1, 0, '');
INSERT INTO t2 VALUES (8, 1, '');
commit;
DELETE ml.* FROM t1 AS ml LEFT JOIN t2 AS mm ON (mm.id=ml.id)
WHERE mm.id IS NULL;
select ml.* from t1 as ml left join t2 as mm on (mm.id=ml.id)
where mm.id is null lock in share mode;
id	f_id	f
drop table t1,t2;
create table t1(a int not null, b int, primary key(a)) engine=innodb;
insert into t1 values(1,1),(2,2),(3,1),(4,2),(5,1),(6,2),(7,3);
commit;
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
update t1 set b = 5 where b = 1;
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
select * from t1 where a = 7 and b = 3 for update;
a	b
7	3
commit;
commit;
drop table t1;
create table t1(a int not null, b int, primary key(a)) engine=innodb;
insert into t1 values(1,1),(2,2),(3,1),(4,2),(5,1),(6,2);
commit;
set autocommit = 0;
select * from t1 lock in share mode;
a	b
1	1
2	2
3	1
4	2
5	1
6	2
update t1 set b = 5 where b = 1;
set autocommit = 0;
select * from t1 where a = 2 and b = 2 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
commit;
drop table t1;
create table t1(a int not null, b int, primary key(a)) engine=innodb;
insert into t1 values (1,2),(5,3),(4,2);
create table t2(d int not null, e int, primary key(d)) engine=innodb;
insert into t2 values (8,6),(12,1),(3,1);
commit;
set autocommit = 0;
select * from t2 for update;
d	e
3	1
8	6
12	1
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
insert into t1 select * from t2;
update t1 set b = (select e from t2 where a = d);
create table t3(d int not null, e int, primary key(d)) engine=innodb
select * from t2;
commit;
commit;
drop table t1, t2, t3;
create table t1(a int not null, b int, primary key(a)) engine=innodb;
insert into t1 values (1,2),(5,3),(4,2);
create table t2(a int not null, b int, primary key(a)) engine=innodb;
insert into t2 values (8,6),(12,1),(3,1);
create table t3(d int not null, b int, primary key(d)) engine=innodb;
insert into t3 values (8,6),(12,1),(3,1);
create table t5(a int not null, b int, primary key(a)) engine=innodb;
insert into t5 values (1,2),(5,3),(4,2);
create table t6(d int not null, e int, primary key(d)) engine=innodb;
insert into t6 values (8,6),(12,1),(3,1);
create table t8(a int not null, b int, primary key(a)) engine=innodb;
insert into t8 values (1,2),(5,3),(4,2);
create table t9(d int not null, e int, primary key(d)) engine=innodb;
insert into t9 values (8,6),(12,1),(3,1);
commit;
set autocommit = 0;
select * from t2 for update;
a	b
3	1
8	6
12	1
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
insert into t1 select * from t2;
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
update t3 set b = (select b from t2 where a = d);
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
create table t4(a int not null, b int, primary key(a)) engine=innodb select * from t2;
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
insert into t5 (select * from t2 lock in share mode);
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
update t6 set e = (select b from t2 where a = d lock in share mode);
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
create table t7(a int not null, b int, primary key(a)) engine=innodb select * from t2 lock in share mode;
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
insert into t8 (select * from t2 for update);
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
update t9 set e = (select b from t2 where a = d for update);
SET binlog_format='MIXED';
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
create table t10(a int not null, b int, primary key(a)) engine=innodb select * from t2 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
drop table t1, t2, t3, t5, t6, t8, t9;
CREATE TABLE t1 (DB_ROW_ID int) engine=innodb;
ERROR HY000: Can't create table 'test.t1' (errno: -1)
CREATE TABLE t1 (
a BIGINT(20) NOT NULL,
PRIMARY KEY  (a)
) ENGINE=INNODB DEFAULT CHARSET=UTF8;
CREATE TABLE t2 (
a BIGINT(20) NOT NULL,
b VARCHAR(128) NOT NULL,
c TEXT NOT NULL,
PRIMARY KEY  (a,b),
KEY idx_t2_b_c (b,c(200)),
CONSTRAINT t_fk FOREIGN KEY (a) REFERENCES t1 (a) 
ON DELETE CASCADE
) ENGINE=INNODB DEFAULT CHARSET=UTF8;
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1, 'bar', 'vbar');
INSERT INTO t2 VALUES (1, 'BAR2', 'VBAR');
INSERT INTO t2 VALUES (1, 'bar_bar', 'bibi');
INSERT INTO t2 VALUES (1, 'customer_over', '1');
SELECT * FROM t2 WHERE b = 'customer_over';
a	b	c
1	customer_over	1
SELECT * FROM t2 WHERE BINARY b = 'customer_over';
a	b	c
1	customer_over	1
SELECT DISTINCT p0.a FROM t2 p0 WHERE p0.b = 'customer_over';
a
1
/* Bang: Empty result set, above was expected: */
SELECT DISTINCT p0.a FROM t2 p0 WHERE BINARY p0.b = 'customer_over';
a
1
SELECT p0.a FROM t2 p0 WHERE BINARY p0.b = 'customer_over';
a
1
drop table t2, t1;
CREATE TABLE t1 ( a int ) ENGINE=innodb;
BEGIN;
INSERT INTO t1 VALUES (1);
OPTIMIZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	note	Table does not support optimize, doing recreate + analyze instead
test.t1	optimize	status	OK
DROP TABLE t1;
CREATE TABLE t1 (id int PRIMARY KEY, f int NOT NULL, INDEX(f)) ENGINE=InnoDB;
CREATE TABLE t2 (id int PRIMARY KEY, f INT NOT NULL,
CONSTRAINT t2_t1 FOREIGN KEY (id) REFERENCES t1 (id)
ON DELETE CASCADE ON UPDATE CASCADE) ENGINE=InnoDB;
ALTER TABLE t2 ADD FOREIGN KEY (f) REFERENCES t1 (f) ON
DELETE CASCADE ON UPDATE CASCADE;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `id` int(11) NOT NULL,
  `f` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `f` (`f`),
  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f`) REFERENCES `t1` (`f`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `t2_t1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t2, t1;
CREATE TABLE t1 (a INT, INDEX(a)) ENGINE=InnoDB;
CREATE TABLE t2 (a INT, INDEX(a)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1);
ALTER TABLE t2 ADD FOREIGN KEY (a) REFERENCES t1 (a) ON DELETE SET NULL;
ALTER TABLE t2 MODIFY a INT NOT NULL;
ERROR HY000: Error on rename of '#sql-temporary' to './test/t2' (errno: 150)
DELETE FROM t1;
DROP TABLE t2,t1;
CREATE TABLE t1 (a VARCHAR(5) COLLATE utf8_unicode_ci PRIMARY KEY)
ENGINE=InnoDB;
INSERT INTO t1 VALUES (0xEFBCA4EFBCA4EFBCA4);
DELETE FROM t1;
INSERT INTO t1 VALUES ('DDD');
SELECT * FROM t1;
a
DDD
DROP TABLE t1;
CREATE TABLE t1 (id int PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB
AUTO_INCREMENT=42;
INSERT INTO t1 VALUES (0),(347),(0);
SELECT * FROM t1;
id
42
347
348
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=349 DEFAULT CHARSET=latin1
CREATE TABLE t2 (id int PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t2 VALUES(42),(347),(348);
ALTER TABLE t1 ADD CONSTRAINT t1_t2 FOREIGN KEY (id) REFERENCES t2(id);
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`),
  CONSTRAINT `t1_t2` FOREIGN KEY (`id`) REFERENCES `t2` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=349 DEFAULT CHARSET=latin1
DROP TABLE t1,t2;
CREATE TABLE t1 (
c01 CHAR(255), c02 CHAR(255), c03 CHAR(255), c04 CHAR(255),
c05 CHAR(255), c06 CHAR(255), c07 CHAR(255), c08 CHAR(255),
c09 CHAR(255), c10 CHAR(255), c11 CHAR(255), c12 CHAR(255),
c13 CHAR(255), c14 CHAR(255), c15 CHAR(255), c16 CHAR(255),
c17 CHAR(255), c18 CHAR(255), c19 CHAR(255), c20 CHAR(255),
c21 CHAR(255), c22 CHAR(255), c23 CHAR(255), c24 CHAR(255),
c25 CHAR(255), c26 CHAR(255), c27 CHAR(255), c28 CHAR(255),
c29 CHAR(255), c30 CHAR(255), c31 CHAR(255), c32 CHAR(255)
) ENGINE = InnoDB;
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. You have to change some columns to TEXT or BLOBs
DROP TABLE IF EXISTS t1;
Warnings:
Note	1051	Unknown table 't1'
CREATE TABLE t1(
id BIGINT(20) NOT NULL AUTO_INCREMENT PRIMARY KEY
) ENGINE=InnoDB;
INSERT INTO t1 VALUES(-10);
SELECT * FROM t1;
id
-10
INSERT INTO t1 VALUES(NULL);
SELECT * FROM t1;
id
-10
1
DROP TABLE t1;
SET binlog_format='MIXED';
SET TX_ISOLATION='read-committed';
SET AUTOCOMMIT=0;
DROP TABLE IF EXISTS t1, t2;
Warnings:
Note	1051	Unknown table 't1'
Note	1051	Unknown table 't2'
CREATE TABLE t1 ( a int ) ENGINE=InnoDB;
CREATE TABLE t2 LIKE t1;
SELECT * FROM t2;
a
SET binlog_format='MIXED';
SET TX_ISOLATION='read-committed';
SET AUTOCOMMIT=0;
INSERT INTO t1 VALUES (1);
COMMIT;
SELECT * FROM t1 WHERE a=1;
a
1
SET binlog_format='MIXED';
SET TX_ISOLATION='read-committed';
SET AUTOCOMMIT=0;
SELECT * FROM t2;
a
SET binlog_format='MIXED';
SET TX_ISOLATION='read-committed';
SET AUTOCOMMIT=0;
INSERT INTO t1 VALUES (2);
COMMIT;
SELECT * FROM t1 WHERE a=2;
a
2
SELECT * FROM t1 WHERE a=2;
a
2
DROP TABLE t1;
DROP TABLE t2;
create table t1 (i int, j int) engine=innodb;
insert into t1 (i, j) values (1, 1), (2, 2);
update t1 set j = 2;
affected rows: 1
info: Rows matched: 2  Changed: 1  Warnings: 0
drop table t1;
create table t1 (id int) comment='this is a comment' engine=innodb;
select table_comment, data_free > 0 as data_free_is_set
from information_schema.tables
where table_schema='test' and table_name = 't1';
table_comment	data_free_is_set
this is a comment	1
drop table t1;
CREATE TABLE t1 (
c1 INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
c2 VARCHAR(128) NOT NULL,
PRIMARY KEY(c1)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=100;
CREATE TABLE t2 (
c1 INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
c2 INT(10) UNSIGNED DEFAULT NULL,
PRIMARY KEY(c1)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=200;
SELECT AUTO_INCREMENT FROM INFORMATION_SCHEMA.TABLES WHERE table_name = 't2';
AUTO_INCREMENT
200
ALTER TABLE t2 ADD CONSTRAINT t1_t2_1 FOREIGN KEY(c1) REFERENCES t1(c1);
SELECT AUTO_INCREMENT FROM INFORMATION_SCHEMA.TABLES WHERE table_name = 't2';
AUTO_INCREMENT
200
DROP TABLE t2;
DROP TABLE t1;
CREATE TABLE t1 (c1 int default NULL,
c2 int default NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
TRUNCATE TABLE t1;
affected rows: 0
INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4), (5, 5);
affected rows: 5
info: Records: 5  Duplicates: 0  Warnings: 0
TRUNCATE TABLE t1;
affected rows: 0
DROP TABLE t1;
Variable_name	Value
Handler_update	0
Variable_name	Value
Handler_delete	0
Variable_name	Value
Handler_update	1
Variable_name	Value
Handler_delete	1