set global innodb_file_per_table=on;
set global innodb_file_format='Barracuda';
CREATE TABLE t1_purge (
A INT,
B BLOB, C BLOB, D BLOB, E BLOB,
F BLOB, G BLOB, H BLOB,
PRIMARY KEY (B(767), C(767), D(767), E(767), A),
INDEX (A)
) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
INSERT INTO t1_purge VALUES (1,
REPEAT('b', 766), REPEAT('c', 766), REPEAT('d', 766), REPEAT('e', 766),
REPEAT('f', 766), REPEAT('g', 766), REPEAT('h', 766));
CREATE TABLE t2_purge (
A INT PRIMARY KEY,
B BLOB, C BLOB, D BLOB, E BLOB,
F BLOB, G BLOB, H BLOB, I BLOB,
J BLOB, K BLOB, L BLOB,
INDEX (B(767))) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
INSERT INTO t2_purge VALUES (1,
REPEAT('b', 766), REPEAT('c', 766), REPEAT('d', 766), REPEAT('e', 766),
REPEAT('f', 766), REPEAT('g', 766), REPEAT('h', 766), REPEAT('i', 766),
REPEAT('j', 766), REPEAT('k', 766), REPEAT('l', 766));
CREATE TABLE t3_purge (
A INT,
B VARCHAR(800), C VARCHAR(800), D VARCHAR(800), E VARCHAR(800),
F VARCHAR(800), G VARCHAR(800), H VARCHAR(800),
PRIMARY KEY (B(767), C(767), D(767), E(767), A),
INDEX (A)
) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
INSERT INTO t3_purge SELECT * FROM t1_purge;
CREATE TABLE t4_purge (
A INT PRIMARY KEY,
B VARCHAR(800), C VARCHAR(800), D VARCHAR(800), E VARCHAR(800),
F VARCHAR(800), G VARCHAR(800), H VARCHAR(800), I VARCHAR(800),
J VARCHAR(800), K VARCHAR(800), L VARCHAR(800),
INDEX (B(767))) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
INSERT INTO t4_purge SELECT * FROM t2_purge;
DELETE FROM t1_purge;
DELETE FROM t2_purge;
DELETE FROM t3_purge;
DELETE FROM t4_purge;
SET @r=REPEAT('a',500);
CREATE TABLE t12637786(a INT,
v1 VARCHAR(500), v2 VARCHAR(500), v3 VARCHAR(500),
v4 VARCHAR(500), v5 VARCHAR(500), v6 VARCHAR(500),
v7 VARCHAR(500), v8 VARCHAR(500), v9 VARCHAR(500),
v10 VARCHAR(500), v11 VARCHAR(500), v12 VARCHAR(500),
v13 VARCHAR(500), v14 VARCHAR(500), v15 VARCHAR(500),
v16 VARCHAR(500), v17 VARCHAR(500), v18 VARCHAR(500)
) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
CREATE INDEX idx1 ON t12637786(a,v1);
INSERT INTO t12637786 VALUES(9,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r,@r);
UPDATE t12637786 SET a=1000;
DELETE FROM t12637786;
create table t12963823(a blob,b blob,c blob,d blob,e blob,f blob,g blob,h blob,
i blob,j blob,k blob,l blob,m blob,n blob,o blob,p blob)
engine=innodb row_format=dynamic;
SET @r = repeat('a', 767);
insert into t12963823 values (@r,@r,@r,@r, @r,@r,@r,@r, @r,@r,@r,@r, @r,@r,@r,@r);
create index ndx_a on t12963823 (a(500));
create index ndx_b on t12963823 (b(500));
create index ndx_c on t12963823 (c(500));
create index ndx_d on t12963823 (d(500));
create index ndx_e on t12963823 (e(500));
create index ndx_f on t12963823 (f(500));
create index ndx_k on t12963823 (k(500));
create index ndx_l on t12963823 (l(500));
SET @r = repeat('b', 500);
update t12963823 set a=@r,b=@r,c=@r,d=@r;
update t12963823 set e=@r,f=@r,g=@r,h=@r;
update t12963823 set i=@r,j=@r,k=@r,l=@r;
update t12963823 set m=@r,n=@r,o=@r,p=@r;
alter table t12963823 drop index ndx_a;
alter table t12963823 drop index ndx_b;
create index ndx_g on t12963823 (g(500));
create index ndx_h on t12963823 (h(500));
create index ndx_i on t12963823 (i(500));
create index ndx_j on t12963823 (j(500));
create index ndx_m on t12963823 (m(500));
create index ndx_n on t12963823 (n(500));
create index ndx_o on t12963823 (o(500));
create index ndx_p on t12963823 (p(500));
show create table t12963823;
Table	Create Table
t12963823	CREATE TABLE `t12963823` (
  `a` blob,
  `b` blob,
  `c` blob,
  `d` blob,
  `e` blob,
  `f` blob,
  `g` blob,
  `h` blob,
  `i` blob,
  `j` blob,
  `k` blob,
  `l` blob,
  `m` blob,
  `n` blob,
  `o` blob,
  `p` blob,
  KEY `ndx_c` (`c`(500)),
  KEY `ndx_d` (`d`(500)),
  KEY `ndx_e` (`e`(500)),
  KEY `ndx_f` (`f`(500)),
  KEY `ndx_k` (`k`(500)),
  KEY `ndx_l` (`l`(500)),
  KEY `ndx_g` (`g`(500)),
  KEY `ndx_h` (`h`(500)),
  KEY `ndx_i` (`i`(500)),
  KEY `ndx_j` (`j`(500)),
  KEY `ndx_m` (`m`(500)),
  KEY `ndx_n` (`n`(500)),
  KEY `ndx_o` (`o`(500)),
  KEY `ndx_p` (`p`(500))
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC
create table t1(a varchar(2) primary key) engine=innodb;
insert into t1 values('');
create index t1a1 on t1(a(1));
drop table t1;
set global innodb_file_per_table=0;
set global innodb_file_format=Antelope;
create table t1(a int not null, b int, c char(10) not null, d varchar(20)) engine = innodb;
insert into t1 values (5,5,'oo','oo'),(4,4,'tr','tr'),(3,4,'ad','ad'),(2,3,'ak','ak');
commit;
alter table t1 add index b (b), add index b (b);
ERROR 42000: Duplicate key name 'b'
alter table t1 add index (b,b);
ERROR 42S21: Duplicate column name 'b'
alter table t1 add index d2 (d);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  KEY `d2` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
explain select * from t1 force index(d2) order by d;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	d2	23	NULL	4	
select * from t1 force index (d2) order by d;
a	b	c	d
3	4	ad	ad
2	3	ak	ak
5	5	oo	oo
4	4	tr	tr
alter table t1 add unique index (b);
ERROR 23000: Duplicate entry '4' for key 'b'
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  KEY `d2` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 add index (b);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  KEY `d2` (`d`),
  KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 add unique index (c), add index (d);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  UNIQUE KEY `c` (`c`),
  KEY `d2` (`d`),
  KEY `b` (`b`),
  KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c	10	NULL	4	
alter table t1 add primary key (a), drop index c;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `d2` (`d`),
  KEY `b` (`b`),
  KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 add primary key (c);
ERROR 42000: Multiple primary key defined
alter table t1 drop primary key, add primary key (b);
ERROR 23000: Duplicate entry '4' for key 'PRIMARY'
create unique index c on t1 (c);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `c` (`c`),
  KEY `d2` (`d`),
  KEY `b` (`b`),
  KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c	10	NULL	4	
select * from t1 force index(c) order by c;
a	b	c	d
3	4	ad	ad
2	3	ak	ak
5	5	oo	oo
4	4	tr	tr
alter table t1 drop index b, add index (b);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `c` (`c`),
  KEY `d2` (`d`),
  KEY `d` (`d`),
  KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
insert into t1 values(6,1,'ggg','ggg');
select * from t1;
a	b	c	d
2	3	ak	ak
3	4	ad	ad
4	4	tr	tr
5	5	oo	oo
6	1	ggg	ggg
select * from t1 force index(b) order by b;
a	b	c	d
6	1	ggg	ggg
2	3	ak	ak
3	4	ad	ad
4	4	tr	tr
5	5	oo	oo
select * from t1 force index(c) order by c;
a	b	c	d
3	4	ad	ad
2	3	ak	ak
6	1	ggg	ggg
5	5	oo	oo
4	4	tr	tr
select * from t1 force index(d) order by d;
a	b	c	d
3	4	ad	ad
2	3	ak	ak
6	1	ggg	ggg
5	5	oo	oo
4	4	tr	tr
explain select * from t1 force index(b) order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	b	5	NULL	5	
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c	10	NULL	5	
explain select * from t1 force index(d) order by d;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	d	23	NULL	5	
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) NOT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `c` (`c`),
  KEY `d2` (`d`),
  KEY `d` (`d`),
  KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,3,'ad','ad'),(4,4,'afe','afe');
commit;
alter table t1 add index (c(2));
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 add unique index (d(10));
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `d` (`d`(10)),
  KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
insert into t1 values(5,1,'ggg','ggg');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	3	ad	ad
4	4	afe	afe
5	1	ggg	ggg
select * from t1 force index(c) order by c;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	3	ad	ad
4	4	afe	afe
5	1	ggg	ggg
select * from t1 force index(d) order by d;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	3	ad	ad
4	4	afe	afe
5	1	ggg	ggg
explain select * from t1 order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	Using filesort
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	Using filesort
explain select * from t1 force index(d) order by d;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	Using filesort
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `d` (`d`(10)),
  KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 drop index d;
insert into t1 values(8,9,'fff','fff');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	3	ad	ad
4	4	afe	afe
5	1	ggg	ggg
8	9	fff	fff
select * from t1 force index(c) order by c;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	3	ad	ad
4	4	afe	afe
8	9	fff	fff
5	1	ggg	ggg
explain select * from t1 order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	6	Using filesort
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	6	Using filesort
explain select * from t1 order by d;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	6	Using filesort
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,2,'ad','ad'),(4,4,'afe','afe');
commit;
alter table t1 add unique index (b,c);
insert into t1 values(8,9,'fff','fff');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
select * from t1 force index(b) order by b;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
explain select * from t1 force index(b) order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	b	16	NULL	5	
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `b` (`b`,`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 add index (b,c);
insert into t1 values(11,11,'kkk','kkk');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
11	11	kkk	kkk
select * from t1 force index(b) order by b;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
11	11	kkk	kkk
explain select * from t1 force index(b) order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	b	16	NULL	6	
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `b` (`b`,`c`),
  KEY `b_2` (`b`,`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t1 add unique index (c,d);
insert into t1 values(13,13,'yyy','aaa');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
11	11	kkk	kkk
13	13	yyy	aaa
select * from t1 force index(b) order by b;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
11	11	kkk	kkk
13	13	yyy	aaa
select * from t1 force index(c) order by c;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
11	11	kkk	kkk
13	13	yyy	aaa
explain select * from t1 force index(b) order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	b	16	NULL	7	
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c	34	NULL	7	
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `b` (`b`,`c`),
  UNIQUE KEY `c` (`c`,`d`),
  KEY `b_2` (`b`,`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;
create table t1(a int not null, b int not null, c int, primary key (a), key (b)) engine = innodb;
create table t3(a int not null, c int not null, d int, primary key (a), key (c)) engine = innodb;
create table t4(a int not null, d int not null, e int, primary key (a), key (d)) engine = innodb;
create table t2(a int not null, b int not null, c int not null, d int not null, e int,
foreign key (b) references t1(b) on delete cascade,
foreign key (c) references t3(c), foreign key (d) references t4(d))
engine = innodb;
alter table t1 drop index b;
ERROR HY000: Cannot drop index 'b': needed in a foreign key constraint
alter table t3 drop index c;
ERROR HY000: Cannot drop index 'c': needed in a foreign key constraint
alter table t4 drop index d;
ERROR HY000: Cannot drop index 'd': needed in a foreign key constraint
alter table t2 drop index b;
ERROR HY000: Cannot drop index 'b': needed in a foreign key constraint
alter table t2 drop index b, drop index c, drop index d;
ERROR HY000: Cannot drop index 'b': needed in a foreign key constraint
create unique index dc on t2 (d,c);
create index dc on t1 (b,c);
alter table t2 add primary key (a);
insert into t1 values (1,1,1);
insert into t3 values (1,1,1);
insert into t4 values (1,1,1);
insert into t2 values (1,1,1,1,1);
commit;
alter table t4 add constraint dc foreign key (a) references t1(a);
show create table t4;
Table	Create Table
t4	CREATE TABLE `t4` (
  `a` int(11) NOT NULL,
  `d` int(11) NOT NULL,
  `e` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `d` (`d`),
  CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t3 add constraint dc foreign key (a) references t1(a);
ERROR HY000: Can't create table `test`.`#sql-temporary` (errno: 121 "Duplicate key on write or update")
show create table t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  `d` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `c` (`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table t2 drop index b, add index (b);
ERROR 42000: Incorrect index name 'b'
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  `d` int(11) NOT NULL,
  `e` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `dc` (`d`,`c`),
  KEY `b` (`b`),
  KEY `c` (`c`),
  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`b`) ON DELETE CASCADE,
  CONSTRAINT `t2_ibfk_2` FOREIGN KEY (`c`) REFERENCES `t3` (`c`),
  CONSTRAINT `t2_ibfk_3` FOREIGN KEY (`d`) REFERENCES `t4` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
delete from t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
drop index dc on t4;
ERROR 42000: Can't DROP 'dc'; check that column/key exists
alter table t3 drop foreign key dc;
ERROR HY000: Error on rename of './test/t3' to '#sql2-temporary' (errno: 152 "Cannot delete a parent row")
alter table t4 drop foreign key dc;
select * from t2;
a	b	c	d	e
1	1	1	1	1
delete from t1;
select * from t2;
a	b	c	d	e
drop table t2,t4,t3,t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb default charset=utf8;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,2,'ad','ad'),(4,4,'afe','afe');
commit;
alter table t1 add unique index (b);
ERROR 23000: Duplicate entry '2' for key 'b'
insert into t1 values(8,9,'fff','fff');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
alter table t1 add index (b);
insert into t1 values(10,10,'kkk','iii');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
10	10	kkk	iii
select * from t1 force index(b) order by b;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
10	10	kkk	iii
explain select * from t1 force index(b) order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	b	5	NULL	6	
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
alter table t1 add unique index (c), add index (d);
insert into t1 values(11,11,'aaa','mmm');
select * from t1;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
10	10	kkk	iii
11	11	aaa	mmm
select * from t1 force index(b) order by b;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
10	10	kkk	iii
11	11	aaa	mmm
select * from t1 force index(c) order by c;
a	b	c	d
11	11	aaa	mmm
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
10	10	kkk	iii
select * from t1 force index(d) order by d;
a	b	c	d
1	1	ab	ab
2	2	ac	ac
3	2	ad	ad
4	4	afe	afe
8	9	fff	fff
10	10	kkk	iii
11	11	aaa	mmm
explain select * from t1 force index(b) order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	b	5	NULL	7	
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c	31	NULL	7	
explain select * from t1 force index(d) order by d;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	d	63	NULL	7	
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `c` (`c`),
  KEY `b` (`b`),
  KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
drop table t1;
create table t1(a int not null, b int) engine = innodb;
insert into t1 values (1,1),(1,1),(1,1),(1,1);
alter table t1 add unique index (a);
ERROR 23000: Duplicate entry '1' for key 'a'
alter table t1 add unique index (b);
ERROR 23000: Duplicate entry '1' for key 'b'
alter table t1 add unique index (a), add unique index(b);
ERROR 23000: Duplicate entry '1' for key 'a'
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;
create table t1(a int not null, c int not null,b int, primary key(a), unique key(c), key(b)) engine = innodb;
alter table t1 drop index c, drop index b;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;
create table t1(a int not null, b int, primary key(a)) engine = innodb;
alter table t1 add index (b);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,3,'ac','ac'),(4,4,'afe','afe'),(5,4,'affe','affe');
alter table t1 add unique index (b), add unique index (c), add unique index (d);
ERROR 23000: Duplicate entry '4' for key 'b'
alter table t1 add unique index (c), add unique index (b), add index (d);
ERROR 23000: Duplicate entry 'ac' for key 'c'
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) DEFAULT NULL,
  `c` char(10) DEFAULT NULL,
  `d` varchar(20) DEFAULT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;
create table t1(a int not null, b int not null, c int, primary key (a), key(c)) engine=innodb;
insert into t1 values (5,1,5),(4,2,4),(3,3,3),(2,4,2),(1,5,1);
alter table t1 add unique index (b);
insert into t1 values (10,20,20),(11,19,19),(12,18,18),(13,17,17);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  `c` int(11) DEFAULT NULL,
  PRIMARY KEY (`a`),
  UNIQUE KEY `b` (`b`),
  KEY `c` (`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
explain select * from t1 force index(c) order by c;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c	5	NULL	9	
explain select * from t1 order by a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	4	NULL	9	
explain select * from t1 force index(b) order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	b	4	NULL	9	
select * from t1 order by a;
a	b	c
1	5	1
2	4	2
3	3	3
4	2	4
5	1	5
10	20	20
11	19	19
12	18	18
13	17	17
select * from t1 force index(b) order by b;
a	b	c
5	1	5
4	2	4
3	3	3
2	4	2
1	5	1
13	17	17
12	18	18
11	19	19
10	20	20
select * from t1 force index(c) order by c;
a	b	c
1	5	1
2	4	2
3	3	3
4	2	4
5	1	5
13	17	17
12	18	18
11	19	19
10	20	20
drop table t1;
create table t1(a int not null, b int not null) engine=innodb;
insert into t1 values (1,1);
alter table t1 add primary key(b);
insert into t1 values (2,2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  PRIMARY KEY (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
select * from t1;
a	b
1	1
2	2
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	
explain select * from t1 order by a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using filesort
explain select * from t1 order by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	4	NULL	2	
checksum table t1;
Table	Checksum
test.t1	582702641
drop table t1;
create table t1(a int not null) engine=innodb;
insert into t1 values (1);
alter table t1 add primary key(a);
insert into t1 values (2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
commit;
select * from t1;
a
1
2
explain select * from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	4	NULL	2	Using index
explain select * from t1 order by a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	4	NULL	2	Using index
drop table t1;
create table t2(d varchar(17) primary key) engine=innodb default charset=utf8;
create table t3(a int primary key) engine=innodb;
insert into t3 values(22),(44),(33),(55),(66);
insert into t2 values ('jejdkrun87'),('adfd72nh9k'),
('adfdpplkeock'),('adfdijnmnb78k'),('adfdijn0loKNHJik');
create table t1(a int, b blob, c text, d text not null)
engine=innodb default charset = utf8;
insert into t1
select a,left(repeat(d,100*a),65535),repeat(d,20*a),d from t2,t3;
drop table t2, t3;
select count(*) from t1 where a=44;
count(*)
5
select a,
length(b),b=left(repeat(d,100*a),65535),length(c),c=repeat(d,20*a),d from t1;
a	length(b)	b=left(repeat(d,100*a),65535)	length(c)	c=repeat(d,20*a)	d
22	22000	1	4400	1	adfd72nh9k
22	35200	1	7040	1	adfdijn0loKNHJik
22	28600	1	5720	1	adfdijnmnb78k
22	26400	1	5280	1	adfdpplkeock
22	22000	1	4400	1	jejdkrun87
33	33000	1	6600	1	adfd72nh9k
33	52800	1	10560	1	adfdijn0loKNHJik
33	42900	1	8580	1	adfdijnmnb78k
33	39600	1	7920	1	adfdpplkeock
33	33000	1	6600	1	jejdkrun87
44	44000	1	8800	1	adfd72nh9k
44	65535	1	14080	1	adfdijn0loKNHJik
44	57200	1	11440	1	adfdijnmnb78k
44	52800	1	10560	1	adfdpplkeock
44	44000	1	8800	1	jejdkrun87
55	55000	1	11000	1	adfd72nh9k
55	65535	1	17600	1	adfdijn0loKNHJik
55	65535	1	14300	1	adfdijnmnb78k
55	65535	1	13200	1	adfdpplkeock
55	55000	1	11000	1	jejdkrun87
66	65535	1	13200	1	adfd72nh9k
66	65535	1	21120	1	adfdijn0loKNHJik
66	65535	1	17160	1	adfdijnmnb78k
66	65535	1	15840	1	adfdpplkeock
66	65535	1	13200	1	jejdkrun87
alter table t1 add primary key (a), add key (b(20));
ERROR 23000: Duplicate entry '22' for key 'PRIMARY'
delete from t1 where a%2;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
alter table t1 add primary key (a,b(255),c(255)), add key (b(767));
select count(*) from t1 where a=44;
count(*)
5
select a,
length(b),b=left(repeat(d,100*a),65535),length(c),c=repeat(d,20*a),d from t1;
a	length(b)	b=left(repeat(d,100*a),65535)	length(c)	c=repeat(d,20*a)	d
22	22000	1	4400	1	adfd72nh9k
22	35200	1	7040	1	adfdijn0loKNHJik
22	28600	1	5720	1	adfdijnmnb78k
22	26400	1	5280	1	adfdpplkeock
22	22000	1	4400	1	jejdkrun87
44	44000	1	8800	1	adfd72nh9k
44	65535	1	14080	1	adfdijn0loKNHJik
44	57200	1	11440	1	adfdijnmnb78k
44	52800	1	10560	1	adfdpplkeock
44	44000	1	8800	1	jejdkrun87
66	65535	1	13200	1	adfd72nh9k
66	65535	1	21120	1	adfdijn0loKNHJik
66	65535	1	17160	1	adfdijnmnb78k
66	65535	1	15840	1	adfdpplkeock
66	65535	1	13200	1	jejdkrun87
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) NOT NULL DEFAULT '0',
  `b` blob NOT NULL,
  `c` text NOT NULL,
  `d` text NOT NULL,
  PRIMARY KEY (`a`,`b`(255),`c`(255)),
  KEY `b` (`b`(767))
) ENGINE=InnoDB DEFAULT CHARSET=utf8
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
explain select * from t1 where b like 'adfd%';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	b	b	769	NULL	11	Using where
drop table t1;
set global innodb_file_per_table=on;
set global innodb_file_format='Barracuda';
create table t1(a blob,b blob,c blob,d blob,e blob,f blob,g blob,h blob,
i blob,j blob,k blob,l blob,m blob,n blob,o blob,p blob,
q blob,r blob,s blob,t blob,u blob)
engine=innodb row_format=dynamic;
create index t1a on t1 (a(767));
create index t1b on t1 (b(767));
create index t1c on t1 (c(767));
create index t1d on t1 (d(767));
create index t1e on t1 (e(767));
create index t1f on t1 (f(767));
create index t1g on t1 (g(767));
create index t1h on t1 (h(767));
create index t1i on t1 (i(767));
create index t1j on t1 (j(767));
create index t1k on t1 (k(767));
create index t1l on t1 (l(767));
create index t1m on t1 (m(767));
create index t1n on t1 (n(767));
create index t1o on t1 (o(767));
create index t1p on t1 (p(767));
create index t1q on t1 (q(767));
create index t1r on t1 (r(767));
create index t1s on t1 (s(767));
create index t1t on t1 (t(767));
create index t1u on t1 (u(767));
ERROR HY000: Too big row
create index t1ut on t1 (u(767), t(767));
ERROR HY000: Too big row
create index t1st on t1 (s(767), t(767));
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` blob,
  `b` blob,
  `c` blob,
  `d` blob,
  `e` blob,
  `f` blob,
  `g` blob,
  `h` blob,
  `i` blob,
  `j` blob,
  `k` blob,
  `l` blob,
  `m` blob,
  `n` blob,
  `o` blob,
  `p` blob,
  `q` blob,
  `r` blob,
  `s` blob,
  `t` blob,
  `u` blob,
  KEY `t1a` (`a`(767)),
  KEY `t1b` (`b`(767)),
  KEY `t1c` (`c`(767)),
  KEY `t1d` (`d`(767)),
  KEY `t1e` (`e`(767)),
  KEY `t1f` (`f`(767)),
  KEY `t1g` (`g`(767)),
  KEY `t1h` (`h`(767)),
  KEY `t1i` (`i`(767)),
  KEY `t1j` (`j`(767)),
  KEY `t1k` (`k`(767)),
  KEY `t1l` (`l`(767)),
  KEY `t1m` (`m`(767)),
  KEY `t1n` (`n`(767)),
  KEY `t1o` (`o`(767)),
  KEY `t1p` (`p`(767)),
  KEY `t1q` (`q`(767)),
  KEY `t1r` (`r`(767)),
  KEY `t1s` (`s`(767)),
  KEY `t1t` (`t`(767)),
  KEY `t1st` (`s`(767),`t`(767))
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC
create index t1u on t1 (u(767));
ERROR HY000: Too big row
alter table t1 row_format=compact;
create index t1u on t1 (u(767));
drop table t1;
CREATE TABLE bug12547647(
a INT NOT NULL, b BLOB NOT NULL, c TEXT,
PRIMARY KEY (b(10), a), INDEX (c(767)), INDEX(b(767))
) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
INSERT INTO bug12547647 VALUES (5,repeat('khdfo5AlOq',1900),repeat('g',7751));
COMMIT;
UPDATE bug12547647 SET c = REPEAT('b',16928);
ERROR HY000: Undo log record is too big.
DROP TABLE bug12547647;
set global innodb_file_per_table=0;
set global innodb_file_format=Antelope;
set global innodb_file_format_max=Antelope;
SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
CREATE TABLE t1(
c1	BIGINT(12) NOT NULL,
PRIMARY KEY (c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE t2(
c1	BIGINT(16) NOT NULL,
c2	BIGINT(12) NOT NULL,
c3	BIGINT(12) NOT NULL,
PRIMARY KEY (c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3) REFERENCES t1(c1);
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`),
  KEY `fk_t2_ca` (`c3`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
CREATE INDEX i_t2_c3_c2 ON t2(c3, c2);
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`),
  KEY `i_t2_c3_c2` (`c3`,`c2`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;
INSERT INTO t2 VALUES(0,0,0);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`))
INSERT INTO t1 VALUES(0);
INSERT INTO t2 VALUES(0,0,0);
DROP TABLE t2;
CREATE TABLE t2(
c1	BIGINT(16) NOT NULL,
c2	BIGINT(12) NOT NULL,
c3	BIGINT(12) NOT NULL,
PRIMARY KEY (c1,c2,c3)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3) REFERENCES t1(c1);
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`,`c2`,`c3`),
  KEY `fk_t2_ca` (`c3`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
CREATE INDEX i_t2_c3_c2 ON t2(c3, c2);
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`,`c2`,`c3`),
  KEY `i_t2_c3_c2` (`c3`,`c2`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
INSERT INTO t2 VALUES(0,0,1);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`))
INSERT INTO t2 VALUES(0,0,0);
DELETE FROM t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`))
DELETE FROM t2;
DROP TABLE t2;
DROP TABLE t1;
CREATE TABLE t1(
c1	BIGINT(12) NOT NULL,
c2	INT(4) NOT NULL,
PRIMARY KEY (c2,c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE t2(
c1	BIGINT(16) NOT NULL,
c2	BIGINT(12) NOT NULL,
c3	BIGINT(12) NOT NULL,
PRIMARY KEY (c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c1);
ERROR HY000: Can't create table `test`.`#sql-temporary` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c2);
ERROR HY000: Can't create table `test`.`#sql-temporary` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c2,c1);
ERROR HY000: Can't create table `test`.`#sql-temporary` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t1 MODIFY COLUMN c2 BIGINT(12) NOT NULL;
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c2);
ERROR HY000: Can't create table `test`.`#sql-temporary` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c2,c1);
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `c1` bigint(12) NOT NULL,
  `c2` bigint(12) NOT NULL,
  PRIMARY KEY (`c2`,`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`),
  KEY `fk_t2_ca` (`c3`,`c2`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
CREATE INDEX i_t2_c2_c1 ON t2(c2, c1);
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`),
  KEY `fk_t2_ca` (`c3`,`c2`),
  KEY `i_t2_c2_c1` (`c2`,`c1`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
CREATE INDEX i_t2_c3_c1_c2 ON t2(c3, c1, c2);
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`),
  KEY `fk_t2_ca` (`c3`,`c2`),
  KEY `i_t2_c2_c1` (`c2`,`c1`),
  KEY `i_t2_c3_c1_c2` (`c3`,`c1`,`c2`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
CREATE INDEX i_t2_c3_c2 ON t2(c3, c2);
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `c1` bigint(16) NOT NULL,
  `c2` bigint(12) NOT NULL,
  `c3` bigint(12) NOT NULL,
  PRIMARY KEY (`c1`),
  KEY `i_t2_c2_c1` (`c2`,`c1`),
  KEY `i_t2_c3_c1_c2` (`c3`,`c1`,`c2`),
  KEY `i_t2_c3_c2` (`c3`,`c2`),
  CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t2;
DROP TABLE t1;
SELECT SLEEP(10);
SLEEP(10)
0
DROP TABLE t1_purge, t2_purge, t3_purge, t4_purge;
DROP TABLE t12637786;
DROP TABLE t12963823;