drop table if exists t1;
select (1,2,3) IN ((3,2,3), (1,2,3), (1,3,3));
(1,2,3) IN ((3,2,3), (1,2,3), (1,3,3))
1
select row(10,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3));
row(10,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3))
0
select row(1,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3));
row(1,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3))
1
select row(10,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3));
row(10,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3))
0
select row('a',1.5,3) IN (row(1,2,3), row('a',1.5,3), row('a','a','a'));
row('a',1.5,3) IN (row(1,2,3), row('a',1.5,3), row('a','a','a'))
1
select row('a',0,3) IN (row(3,2,3), row('a','0','3'), row(1,3,3));
row('a',0,3) IN (row(3,2,3), row('a','0','3'), row(1,3,3))
1
select row('a',0,3) IN (row(3,2,3), row('a','a','3'), row(1,3,3));
row('a',0,3) IN (row(3,2,3), row('a','a','3'), row(1,3,3))
1
select row('a',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3));
row('a',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3))
1
select row('b',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3));
row('b',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3))
0
select row('b',1.5,3) IN (row('b',NULL,3), row('a',1.5,3), row(1,3,3));
row('b',1.5,3) IN (row('b',NULL,3), row('a',1.5,3), row(1,3,3))
NULL
select row('b',1.5,3) IN (row('b',NULL,4), row('a',1.5,3), row(1,3,3));
row('b',1.5,3) IN (row('b',NULL,4), row('a',1.5,3), row(1,3,3))
0
select (1,2,(3,4)) IN ((3,2,(3,4)), (1,2,(3,4)));
(1,2,(3,4)) IN ((3,2,(3,4)), (1,2,(3,4)))
1
select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,4));
ERROR 21000: Operand should contain 2 column(s)
select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)));
row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)))
NULL
explain extended select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1003	select ((1,2,(3,4)) in ((3,2,(3,4)),(1,2,(3,NULL)))) AS `row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)))`
SELECT (1,2,3)=(0,NULL,3);
(1,2,3)=(0,NULL,3)
0
SELECT (1,2,3)=(1,NULL,3);
(1,2,3)=(1,NULL,3)
NULL
SELECT (1,2,3)=(1,NULL,0);
(1,2,3)=(1,NULL,0)
0
SELECT ROW(1,2,3)=ROW(1,2,3);
ROW(1,2,3)=ROW(1,2,3)
1
SELECT ROW(2,2,3)=ROW(1+1,2,3);
ROW(2,2,3)=ROW(1+1,2,3)
1
SELECT ROW(1,2,3)=ROW(1+1,2,3);
ROW(1,2,3)=ROW(1+1,2,3)
0
SELECT ROW(1,2,3)<ROW(1+1,2,3);
ROW(1,2,3)<ROW(1+1,2,3)
1
SELECT ROW(1,2,3)>ROW(1+1,2,3);
ROW(1,2,3)>ROW(1+1,2,3)
0
SELECT ROW(1,2,3)<=ROW(1+1,2,3);
ROW(1,2,3)<=ROW(1+1,2,3)
1
SELECT ROW(1,2,3)>=ROW(1+1,2,3);
ROW(1,2,3)>=ROW(1+1,2,3)
0
SELECT ROW(1,2,3)<>ROW(1+1,2,3);
ROW(1,2,3)<>ROW(1+1,2,3)
1
SELECT ROW(NULL,2,3)=ROW(NULL,2,3);
ROW(NULL,2,3)=ROW(NULL,2,3)
NULL
SELECT ROW(NULL,2,3)<=>ROW(NULL,2,3);
ROW(NULL,2,3)<=>ROW(NULL,2,3)
1
SELECT ROW(1,2,ROW(3,4,5))=ROW(1,2,ROW(3,4,5));
ROW(1,2,ROW(3,4,5))=ROW(1,2,ROW(3,4,5))
1
SELECT ROW('test',2,3.33)=ROW('test',2,3.33);
ROW('test',2,3.33)=ROW('test',2,3.33)
1
SELECT ROW('test',2,3.33)=ROW('test',2,3.33,4);
ERROR 21000: Operand should contain 3 column(s)
SELECT ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,33));
ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,33))
1
SELECT ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,3));
ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,3))
0
SELECT ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,NULL));
ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,NULL))
NULL
SELECT ROW('test',2,ROW(3,33))=ROW('test',2,4);
ERROR 21000: Operand should contain 2 column(s)
create table t1 ( a int, b int, c int);
insert into t1 values (1,2,3), (2,3,1), (3,2,1), (1,2,NULL);
select * from t1 where ROW(1,2,3)=ROW(a,b,c);
a	b	c
1	2	3
select * from t1 where ROW(0,2,3)=ROW(a,b,c);
a	b	c
select * from t1 where ROW(1,2,3)<ROW(a,b,c);
a	b	c
2	3	1
3	2	1
select ROW(a,2,3) IN(row(1,b,c), row(2,3,1)) from t1;
ROW(a,2,3) IN(row(1,b,c), row(2,3,1))
1
0
0
NULL
select ROW(c,2,3) IN(row(1,b,a), row(2,3,1)) from t1;
ROW(c,2,3) IN(row(1,b,a), row(2,3,1))
0
0
1
NULL
select ROW(a,b,c) IN(row(1,2,3), row(3,2,1)) from t1;
ROW(a,b,c) IN(row(1,2,3), row(3,2,1))
1
0
1
NULL
select ROW(1,2,3) IN(row(a,b,c), row(1,2,3)) from t1;
ROW(1,2,3) IN(row(a,b,c), row(1,2,3))
1
1
1
1
drop table t1;
select ROW(1,1);
ERROR 21000: Operand should contain 1 column(s)
create table t1 (i int);
select 1 from t1 where ROW(1,1);
ERROR 21000: Operand should contain 1 column(s)
select count(*) from t1 order by ROW(1,1);
ERROR 21000: Operand should contain 1 column(s)
select count(*) from t1 having (1,1) order by i;
ERROR 21000: Operand should contain 1 column(s)
drop table t1;
create table t1 (a int, b int);
insert into t1 values (1, 4);
insert into t1 values (10, 40);
insert into t1 values (1, 4);
insert into t1 values (10, 43);
insert into t1 values (1, 4);
insert into t1 values (10, 41);
insert into t1 values (1, 4);
insert into t1 values (10, 43);
insert into t1 values (1, 4);
select a, MAX(b), (1, MAX(b)) = (1, 4) from t1 group by a;
a	MAX(b)	(1, MAX(b)) = (1, 4)
1	4	1
10	43	0
drop table t1;
SELECT ROW(2,10) <=> ROW(3,4);
ROW(2,10) <=> ROW(3,4)
0
SELECT ROW(NULL,10) <=> ROW(3,NULL);
ROW(NULL,10) <=> ROW(3,NULL)
0
SELECT ROW(1,ROW(2,3)) IN (ROW(1,ROW(2,3)),ROW(1,1));
ERROR 21000: Operand should contain 2 column(s)
SELECT ROW(1,ROW(2,3)) IN (ROW(1,ROW(2,3)),ROW(1,1),ROW(1,ROW(2,3)));
ERROR 21000: Operand should contain 2 column(s)
SELECT ROW(1,ROW(2,3)) IN (ROW(1,ROW(2,3)),ROW(1,ROW(2,2,2)));
ERROR 21000: Operand should contain 2 column(s)
SELECT ROW(1,ROW(2,3,4)) IN (ROW(1,ROW(2,3,4)),ROW(1,ROW(2,2)));
ERROR 21000: Operand should contain 3 column(s)
SELECT ROW(1,ROW(2,3)) IN (ROW(1,ROW(2,3)),(SELECT 1,1));
ERROR 21000: Operand should contain 2 column(s)
SELECT ROW(1,ROW(2,3)) IN (ROW(1,ROW(2,3)),(SELECT 1,1),ROW(1,ROW(2,4)));
ERROR 21000: Operand should contain 2 column(s)
SELECT ROW(1,ROW(2,3)) IN ((SELECT 1,1),ROW(1,ROW(2,3)));
ERROR 21000: Operand should contain 2 column(s)
SELECT ROW(2,1) IN (ROW(21,2),ROW(ROW(1,1,3),0));
ERROR 21000: Operand should contain 1 column(s)
SELECT ROW(2,1) IN (ROW(ROW(1,1,3),0),ROW(21,2));
ERROR 21000: Operand should contain 1 column(s)
CREATE TABLE t1(a int, b int, c int);
INSERT INTO t1 VALUES (1, 2, 3),
(NULL, 2, 3  ), (1, NULL, 3  ), (1, 2,   NULL),
(NULL, 2, 3+1), (1, NULL, 3+1), (1, 2+1, NULL),
(NULL, 2, 3-1), (1, NULL, 3-1), (1, 2-1, NULL);
SELECT (1,2,3) = (1,   NULL, 3);
(1,2,3) = (1,   NULL, 3)
NULL
SELECT (1,2,3) = (1+1, NULL, 3);
(1,2,3) = (1+1, NULL, 3)
0
SELECT (1,2,3) = (1,   NULL, 3+1);
(1,2,3) = (1,   NULL, 3+1)
0
SELECT * FROM t1 WHERE (a,b,c) = (1,2,3);
a	b	c
1	2	3
SELECT (1,2,3) <> (1,   NULL, 3);
(1,2,3) <> (1,   NULL, 3)
NULL
SELECT (1,2,3) <> (1+1, NULL, 3);
(1,2,3) <> (1+1, NULL, 3)
1
SELECT (1,2,3) <> (1,   NULL, 3+1);
(1,2,3) <> (1,   NULL, 3+1)
1
SELECT * FROM t1 WHERE (a,b,c) <> (1,2,3);
a	b	c
NULL	2	4
1	NULL	4
1	3	NULL
NULL	2	2
1	NULL	2
1	1	NULL
SELECT (1,2,3) < (NULL, 2,    3);
(1,2,3) < (NULL, 2,    3)
NULL
SELECT (1,2,3) < (1,    NULL, 3);
(1,2,3) < (1,    NULL, 3)
NULL
SELECT (1,2,3) < (1-1,  NULL, 3);
(1,2,3) < (1-1,  NULL, 3)
0
SELECT (1,2,3) < (1+1,  NULL, 3);
(1,2,3) < (1+1,  NULL, 3)
1
SELECT * FROM t1 WHERE (a,b,c) < (1,2,3);
a	b	c
1	1	NULL
SELECT (1,2,3) <= (NULL, 2,    3);
(1,2,3) <= (NULL, 2,    3)
NULL
SELECT (1,2,3) <= (1,    NULL, 3);
(1,2,3) <= (1,    NULL, 3)
NULL
SELECT (1,2,3) <= (1-1,  NULL, 3);
(1,2,3) <= (1-1,  NULL, 3)
0
SELECT (1,2,3) <= (1+1,  NULL, 3);
(1,2,3) <= (1+1,  NULL, 3)
1
SELECT * FROM t1 WHERE (a,b,c) <= (1,2,3);
a	b	c
1	2	3
1	1	NULL
SELECT (1,2,3) > (NULL, 2,    3);
(1,2,3) > (NULL, 2,    3)
NULL
SELECT (1,2,3) > (1,    NULL, 3);
(1,2,3) > (1,    NULL, 3)
NULL
SELECT (1,2,3) > (1-1,  NULL, 3);
(1,2,3) > (1-1,  NULL, 3)
1
SELECT (1,2,3) > (1+1,  NULL, 3);
(1,2,3) > (1+1,  NULL, 3)
0
SELECT * FROM t1 WHERE (a,b,c) > (1,2,3);
a	b	c
1	3	NULL
SELECT (1,2,3) >= (NULL, 2,    3);
(1,2,3) >= (NULL, 2,    3)
NULL
SELECT (1,2,3) >= (1,    NULL, 3);
(1,2,3) >= (1,    NULL, 3)
NULL
SELECT (1,2,3) >= (1-1,  NULL, 3);
(1,2,3) >= (1-1,  NULL, 3)
1
SELECT (1,2,3) >= (1+1,  NULL, 3);
(1,2,3) >= (1+1,  NULL, 3)
0
SELECT * FROM t1 WHERE (a,b,c) >= (1,2,3);
a	b	c
1	2	3
1	3	NULL
DROP TABLE t1;