subselect_no_scache.result 196 KB
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select @@optimizer_switch like '%subquery_cache=on%';
@@optimizer_switch like '%subquery_cache=on%'
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set optimizer_switch='subquery_cache=off';
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
drop view if exists v2;
set @subselect_tmp=@@optimizer_switch;
set @@optimizer_switch=ifnull(@optimizer_switch_for_subselect_test,
Igor Babaev's avatar
Igor Babaev committed
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"semijoin=on,firstmatch=on,loosescan=on,semijoin_with_cache=on,partial_match_rowid_merge=off,partial_match_table_scan=off");
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set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
select (select 2);
(select 2)
2
explain extended select (select 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1249	Select 2 was reduced during optimization
Note	1003	select 2 AS `(select 2)`
SELECT (SELECT 1) UNION SELECT (SELECT 2);
(SELECT 1)
1
2
explain extended SELECT (SELECT 1) UNION SELECT (SELECT 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union1,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1249	Select 2 was reduced during optimization
Note	1249	Select 4 was reduced during optimization
Note	1003	select 1 AS `(SELECT 1)` union select 2 AS `(SELECT 2)`
SELECT (SELECT (SELECT 0 UNION SELECT 0));
(SELECT (SELECT 0 UNION SELECT 0))
0
explain extended SELECT (SELECT (SELECT 0 UNION SELECT 0));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
4	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union3,4>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1249	Select 2 was reduced during optimization
Note	1003	select (select 0 union select 0) AS `(SELECT (SELECT 0 UNION SELECT 0))`
SELECT (SELECT 1 FROM (SELECT 1) as b HAVING a=1) as a;
ERROR 42S22: Reference 'a' not supported (forward reference in item list)
SELECT (SELECT 1 FROM (SELECT 1) as b HAVING b=1) as a,(SELECT 1 FROM (SELECT 1) as c HAVING a=1) as b;
ERROR 42S22: Reference 'b' not supported (forward reference in item list)
SELECT (SELECT 1),MAX(1) FROM (SELECT 1) as a;
(SELECT 1)	MAX(1)
1	1
SELECT (SELECT a) as a;
ERROR 42S22: Reference 'a' not supported (forward reference in item list)
EXPLAIN EXTENDED SELECT 1 FROM (SELECT 1 as a) as b  HAVING (SELECT a)=1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	system	NULL	NULL	NULL	NULL	1	100.00	
3	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1276	Field or reference 'b.a' of SELECT #3 was resolved in SELECT #1
Note	1276	Field or reference 'b.a' of SELECT #3 was resolved in SELECT #1
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Note	1003	select 1 AS `1` from (select 1 AS `a`) `b` having ((select 1) = 1)
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SELECT 1 FROM (SELECT 1 as a) as b HAVING (SELECT a)=1;
1
1
SELECT (SELECT 1), a;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT 1) as b HAVING (SELECT a)=1;
a
1
SELECT 1 FROM (SELECT (SELECT a) b) c;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT * FROM (SELECT 1 as id) b WHERE id IN (SELECT * FROM (SELECT 1 as id) c ORDER BY id);
id
1
SELECT * FROM (SELECT 1) a  WHERE 1 IN (SELECT 1,1);
ERROR 21000: Operand should contain 1 column(s)
SELECT 1 IN (SELECT 1);
1 IN (SELECT 1)
1
SELECT 1 FROM (SELECT 1 as a) b WHERE 1 IN (SELECT (SELECT a));
1
1
select (SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE(1));
ERROR HY000: Incorrect usage of PROCEDURE and subquery
SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE((SELECT 1));
ERROR HY000: Incorrect parameters to procedure 'ANALYSE'
SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NULL;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NOT NULL;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT (SELECT 1,2,3) = ROW(1,2,3);
(SELECT 1,2,3) = ROW(1,2,3)
1
SELECT (SELECT 1,2,3) = ROW(1,2,1);
(SELECT 1,2,3) = ROW(1,2,1)
0
SELECT (SELECT 1,2,3) < ROW(1,2,1);
(SELECT 1,2,3) < ROW(1,2,1)
0
SELECT (SELECT 1,2,3) > ROW(1,2,1);
(SELECT 1,2,3) > ROW(1,2,1)
1
SELECT (SELECT 1,2,3) = ROW(1,2,NULL);
(SELECT 1,2,3) = ROW(1,2,NULL)
NULL
SELECT ROW(1,2,3) = (SELECT 1,2,3);
ROW(1,2,3) = (SELECT 1,2,3)
1
SELECT ROW(1,2,3) = (SELECT 1,2,1);
ROW(1,2,3) = (SELECT 1,2,1)
0
SELECT ROW(1,2,3) < (SELECT 1,2,1);
ROW(1,2,3) < (SELECT 1,2,1)
0
SELECT ROW(1,2,3) > (SELECT 1,2,1);
ROW(1,2,3) > (SELECT 1,2,1)
1
SELECT ROW(1,2,3) = (SELECT 1,2,NULL);
ROW(1,2,3) = (SELECT 1,2,NULL)
NULL
SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'a');
(SELECT 1.5,2,'a') = ROW(1.5,2,'a')
1
SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'b');
(SELECT 1.5,2,'a') = ROW(1.5,2,'b')
0
SELECT (SELECT 1.5,2,'a') = ROW('1.5b',2,'b');
(SELECT 1.5,2,'a') = ROW('1.5b',2,'b')
0
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: '1.5b'
SELECT (SELECT 'b',2,'a') = ROW(1.5,2,'a');
(SELECT 'b',2,'a') = ROW(1.5,2,'a')
0
SELECT (SELECT 1.5,2,'a') = ROW(1.5,'2','a');
(SELECT 1.5,2,'a') = ROW(1.5,'2','a')
1
SELECT (SELECT 1.5,'c','a') = ROW(1.5,2,'a');
(SELECT 1.5,'c','a') = ROW(1.5,2,'a')
0
SELECT (SELECT * FROM (SELECT 'test' a,'test' b) a);
ERROR 21000: Operand should contain 1 column(s)
SELECT 1 as a,(SELECT a+a) b,(SELECT b);
a	b	(SELECT b)
1	2	2
create table t1 (a int);
create table t2 (a int, b int);
create table t3 (a int);
create table t4 (a int not null, b int not null);
insert into t1 values (2);
insert into t2 values (1,7),(2,7);
insert into t4 values (4,8),(3,8),(5,9);
select (select a from t1 where t1.a = a1) as a2, (select b from t2 where t2.b=a2) as a1;
ERROR 42S22: Reference 'a1' not supported (forward reference in item list)
select (select a from t1 where t1.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a)	a
NULL	1
2	2
select (select a from t1 where t1.a=t2.b), a from t2;
(select a from t1 where t1.a=t2.b)	a
NULL	1
NULL	2
select (select a from t1), a, (select 1 union select 2 limit 1) from t2;
(select a from t1)	a	(select 1 union select 2 limit 1)
2	1	1
2	2	1
select (select a from t3), a from t2;
(select a from t3)	a
NULL	1
NULL	2
select * from t2 where t2.a=(select a from t1);
a	b
2	7
insert into t3 values (6),(7),(3);
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1);
a	b
1	7
2	7
(select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)) union (select * from t4 order by a limit 2) limit 3;
a	b
1	7
2	7
3	8
(select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)) union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
a	b
1	7
2	7
4	8
3	8
explain extended (select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)) union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using filesort
3	UNION	t4	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
4	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
NULL	UNION RESULT	<union1,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1003	(select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (`test`.`t2`.`b` = (select `test`.`t3`.`a` from `test`.`t3` order by 1 desc limit 1))) union (select `test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t4` where (`test`.`t4`.`b` = (select (max(`test`.`t2`.`a`) * 4) from `test`.`t2`)) order by `a`)
select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
(select a from t3 where a<t2.a*4 order by 1 desc limit 1)	a
3	1
7	2
select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
(select t3.a from t3 where a<8 order by 1 desc limit 1)	a
7	2
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set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
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explain extended select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
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1	PRIMARY	<derived3>	ALL	NULL	NULL	NULL	NULL	2	100.00	
3	DERIVED	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
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2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using filesort
Warnings:
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Note	1003	select (select `test`.`t3`.`a` from `test`.`t3` where (`test`.`t3`.`a` < 8) order by 1 desc limit 1) AS `(select t3.a from t3 where a<8 order by 1 desc limit 1)`,`tt`.`a` AS `a` from (select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (`test`.`t2`.`a` > 1)) `tt`
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set optimizer_switch=@tmp_optimizer_switch;
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select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
a
2
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a > t1.a) order by 1 desc limit 1);
a
2
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1);
a
select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
b	(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)
8	7.5000
8	4.5000
9	7.5000
explain extended select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
3	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t4.a' of SELECT #3 was resolved in SELECT #1
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Note	1003	select `test`.`t4`.`b` AS `b`,(select avg((`test`.`t2`.`a` + (select min(`test`.`t3`.`a`) from `test`.`t3` where (`test`.`t3`.`a` >= `test`.`t4`.`a`)))) from `test`.`t2`) AS `(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)` from `test`.`t4`
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select * from t3 where exists (select * from t2 where t2.b=t3.a);
a
7
select * from t3 where not exists (select * from t2 where t2.b=t3.a);
a
6
3
select * from t3 where a in (select b from t2);
a
7
select * from t3 where a not in (select b from t2);
a
6
3
select * from t3 where a = some (select b from t2);
a
7
select * from t3 where a <> any (select b from t2);
a
6
3
select * from t3 where a = all (select b from t2);
a
7
select * from t3 where a <> all (select b from t2);
a
6
3
insert into t2 values (100, 5);
select * from t3 where a < any (select b from t2);
a
6
3
select * from t3 where a < all (select b from t2);
a
3
select * from t3 where a >= any (select b from t2);
a
6
7
explain extended select * from t3 where a >= any (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,((select min(`test`.`t2`.`b`) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`))))
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select * from t3 where a >= all (select b from t2);
a
7
delete from t2 where a=100;
select * from t3 where a in (select a,b from t2);
ERROR 21000: Operand should contain 1 column(s)
select * from t3 where a in (select * from t2);
ERROR 21000: Operand should contain 1 column(s)
insert into t4 values (12,7),(1,7),(10,9),(9,6),(7,6),(3,9),(1,10);
select b,max(a) as ma from t4 group by b having b < (select max(t2.a) from t2 where t2.b=t4.b);
b	ma
insert into t2 values (2,10);
select b,max(a) as ma from t4 group by b having ma < (select max(t2.a) from t2 where t2.b=t4.b);
b	ma
10	1
delete from t2 where a=2 and b=10;
select b,max(a) as ma from t4 group by b having b >= (select max(t2.a) from t2 where t2.b=t4.b);
b	ma
7	12
create table t5 (a int);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)	a
NULL	1
2	2
insert into t5 values (5);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)	a
NULL	1
2	2
insert into t5 values (2);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)	a
NULL	1
2	2
explain extended select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
3	DEPENDENT UNION	t5	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1276	Field or reference 'test.t2.a' of SELECT #2 was resolved in SELECT #1
Note	1276	Field or reference 'test.t2.a' of SELECT #3 was resolved in SELECT #1
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Note	1003	select (select 2 from `test`.`t1` where (2 = `test`.`t2`.`a`) union select `test`.`t5`.`a` from `test`.`t5` where (`test`.`t5`.`a` = `test`.`t2`.`a`)) AS `(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)`,`test`.`t2`.`a` AS `a` from `test`.`t2`
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select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
ERROR 21000: Subquery returns more than 1 row
create table t6 (patient_uq int, clinic_uq int, index i1 (clinic_uq));
create table t7( uq int primary key, name char(25));
insert into t7 values(1,"Oblastnaia bolnitsa"),(2,"Bolnitsa Krasnogo Kresta");
insert into t6 values (1,1),(1,2),(2,2),(1,3);
select * from t6 where exists (select * from t7 where uq = clinic_uq);
patient_uq	clinic_uq
1	1
1	2
2	2
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t6	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
2	DEPENDENT SUBQUERY	t7	eq_ref	PRIMARY	PRIMARY	4	test.t6.clinic_uq	1	100.00	Using index
Warnings:
Note	1276	Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
347
Note	1003	select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t6` where exists(select 1 from `test`.`t7` where (`test`.`t7`.`uq` = `test`.`t6`.`clinic_uq`))
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select * from t1 where a= (select a from t2,t4 where t2.b=t4.b);
ERROR 23000: Column 'a' in field list is ambiguous
drop table t1,t2,t3;
CREATE TABLE t3 (a varchar(20),b char(1) NOT NULL default '0');
INSERT INTO t3 VALUES ('W','a'),('A','c'),('J','b');
CREATE TABLE t2 (a varchar(20),b int NOT NULL default '0');
INSERT INTO t2 VALUES ('W','1'),('A','3'),('J','2');
CREATE TABLE t1 (a varchar(20),b date NOT NULL default '0000-00-00');
INSERT INTO t1 VALUES ('W','1732-02-22'),('A','1735-10-30'),('J','1743-04-13');
SELECT * FROM t1 WHERE b = (SELECT MIN(b) FROM t1);
a	b
W	1732-02-22
SELECT * FROM t2 WHERE b = (SELECT MIN(b) FROM t2);
a	b
W	1
SELECT * FROM t3 WHERE b = (SELECT MIN(b) FROM t3);
a	b
W	a
CREATE TABLE `t8` (
`pseudo` varchar(35) character set latin1 NOT NULL default '',
`email` varchar(60) character set latin1 NOT NULL default '',
PRIMARY KEY  (`pseudo`),
UNIQUE KEY `email` (`email`)
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
INSERT INTO t8 (pseudo,email) VALUES ('joce','test');
INSERT INTO t8 (pseudo,email) VALUES ('joce1','test1');
INSERT INTO t8 (pseudo,email) VALUES ('2joce1','2test1');
EXPLAIN EXTENDED SELECT pseudo,(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce')) FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
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1	PRIMARY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	Using where; Using index
378
4	SUBQUERY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	Using index
379
2	SUBQUERY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	Using where
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3	SUBQUERY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	Using index
Warnings:
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382
Note	1003	select `test`.`t8`.`pseudo` AS `pseudo`,(select `test`.`t8`.`email` from `test`.`t8` where (`test`.`t8`.`pseudo` = (select 'joce' from `test`.`t8` where 1))) AS `(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce'))` from `test`.`t8` where (`test`.`t8`.`pseudo` = (select 'joce' from `test`.`t8` where 1))
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SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo,email FROM
t8 WHERE pseudo='joce');
ERROR 21000: Operand should contain 1 column(s)
SELECT pseudo FROM t8 WHERE pseudo=(SELECT * FROM t8 WHERE
pseudo='joce');
ERROR 21000: Operand should contain 1 column(s)
SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
pseudo
joce
SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo LIKE '%joce%');
ERROR 21000: Subquery returns more than 1 row
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8;
CREATE TABLE `t1` (
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`pseudo`,`date`,`topic`),
KEY `topic` (`topic`)
) ENGINE=MyISAM ROW_FORMAT=DYNAMIC;
INSERT INTO t1 (topic,date,pseudo) VALUES
('43506','2002-10-02','joce'),('40143','2002-08-03','joce');
EXPLAIN EXTENDED SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	43	NULL	2	100.00	Using where; Using index
Warnings:
Note	1003	select distinct `test`.`t1`.`date` AS `date` from `test`.`t1` where (`test`.`t1`.`date` = '2002-08-03')
EXPLAIN EXTENDED SELECT (SELECT DISTINCT date FROM t1 WHERE date='2002-08-03');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	SUBQUERY	t1	index	NULL	PRIMARY	43	NULL	2	100.00	Using where; Using index
Warnings:
Note	1003	select (select distinct `test`.`t1`.`date` from `test`.`t1` where (`test`.`t1`.`date` = '2002-08-03')) AS `(SELECT DISTINCT date FROM t1 WHERE date='2002-08-03')`
SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
date
2002-08-03
SELECT (SELECT DISTINCT date FROM t1 WHERE date='2002-08-03');
(SELECT DISTINCT date FROM t1 WHERE date='2002-08-03')
2002-08-03
SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION SELECT 1) UNION ALL SELECT 1;
1
1
1
1
SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION ALL SELECT 1) UNION SELECT 1;
ERROR 21000: Subquery returns more than 1 row
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION SELECT 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	topic	3	NULL	2	100.00	Using index
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1003	select 1 AS `1` from `test`.`t1` where (1 = (select 1 union select 1))
drop table t1;
CREATE TABLE `t1` (
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
) ENGINE=MyISAM ROW_FORMAT=FIXED;
INSERT INTO t1 (numeropost,maxnumrep) VALUES (40143,1),(43506,2);
CREATE TABLE `t2` (
`mot` varchar(30) NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) NOT NULL default '',
PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`)
) ENGINE=MyISAM ROW_FORMAT=DYNAMIC;
INSERT INTO t2 (mot,topic,date,pseudo) VALUES ('joce','40143','2002-10-22','joce'), ('joce','43506','2002-10-22','joce');
select numeropost as a FROM t1 GROUP BY (SELECT 1 FROM t1 HAVING a=1);
a
40143
SELECT numeropost,maxnumrep FROM t1 WHERE exists (SELECT 1 FROM t2 WHERE (mot='joce') AND date >= '2002-10-21' AND t1.numeropost = t2.topic) ORDER BY maxnumrep DESC LIMIT 0, 20;
numeropost	maxnumrep
43506	2
40143	1
SELECT (SELECT 1) as a FROM (SELECT 1 FROM t1 HAVING a=1) b;
ERROR 42S22: Unknown column 'a' in 'having clause'
SELECT 1 IN (SELECT 1 FROM t2 HAVING a);
ERROR 42S22: Unknown column 'a' in 'having clause'
SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
joce	43506	2002-10-22	joce
SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
mot	topic	date	pseudo
SELECT * from t2 where topic IN (SELECT SUM(topic) FROM t1);
mot	topic	date	pseudo
SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
joce	43506	2002-10-22	joce
SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
mot	topic	date	pseudo
SELECT * from t2 where topic = any (SELECT SUM(topic) FROM t1);
mot	topic	date	pseudo
SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic);
mot	topic	date	pseudo
SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
joce	43506	2002-10-22	joce
SELECT *, topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100) from t2;
mot	topic	date	pseudo	topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100)
joce	40143	2002-10-22	joce	1
joce	43506	2002-10-22	joce	1
SELECT * from t2 where topic = all (SELECT SUM(topic) FROM t2);
mot	topic	date	pseudo
SELECT * from t2 where topic <> any (SELECT SUM(topic) FROM t2);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
joce	43506	2002-10-22	joce
SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000);
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
SELECT *, topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000) from t2;
mot	topic	date	pseudo	topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000)
joce	40143	2002-10-22	joce	1
joce	43506	2002-10-22	joce	0
drop table t1,t2;
CREATE TABLE `t1` (
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
) ENGINE=MyISAM ROW_FORMAT=FIXED;
INSERT INTO t1 (numeropost,maxnumrep) VALUES (1,0),(2,1);
select numeropost as a FROM t1 GROUP BY (SELECT 1 FROM t1 HAVING a=1);
ERROR 21000: Subquery returns more than 1 row
select numeropost as a FROM t1 ORDER BY (SELECT 1 FROM t1 HAVING a=1);
ERROR 21000: Subquery returns more than 1 row
show warnings;
Level	Code	Message
Error	1242	Subquery returns more than 1 row
drop table t1;
create table t1 (a int);
insert into t1 values (1),(2),(3);
(select * from t1) union (select * from t1) order by (select a from t1 limit 1);
a
1
2
3
drop table t1;
CREATE TABLE t1 (field char(1) NOT NULL DEFAULT 'b');
INSERT INTO t1 VALUES ();
SELECT field FROM t1 WHERE 1=(SELECT 1 UNION ALL SELECT 1 FROM (SELECT 1) a HAVING field='b');
ERROR 21000: Subquery returns more than 1 row
drop table t1;
CREATE TABLE `t1` (
`numeropost` mediumint(8) unsigned NOT NULL default '0',
`numreponse` int(10) unsigned NOT NULL auto_increment,
`pseudo` varchar(35) NOT NULL default '',
PRIMARY KEY  (`numeropost`,`numreponse`),
UNIQUE KEY `numreponse` (`numreponse`),
KEY `pseudo` (`pseudo`,`numeropost`)
) ENGINE=MyISAM;
SELECT (SELECT numeropost FROM t1 HAVING numreponse=a),numreponse FROM (SELECT * FROM t1) as a;
ERROR 42S22: Reference 'numreponse' not supported (forward reference in item list)
SELECT numreponse, (SELECT numeropost FROM t1 HAVING numreponse=a) FROM (SELECT * FROM t1) as a;
ERROR 42S22: Unknown column 'a' in 'having clause'
SELECT numreponse, (SELECT numeropost FROM t1 HAVING numreponse=1) FROM (SELECT * FROM t1) as a;
numreponse	(SELECT numeropost FROM t1 HAVING numreponse=1)
INSERT INTO t1 (numeropost,numreponse,pseudo) VALUES (1,1,'joce'),(1,2,'joce'),(1,3,'test');
EXPLAIN EXTENDED SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT 1 FROM t1 WHERE numeropost='1');
unknown's avatar
unknown committed
553 554 555 556
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	const	PRIMARY,numreponse	PRIMARY	7	const,const	1	100.00	Using where; Using index
2	SUBQUERY	t1	ref	PRIMARY	PRIMARY	3	const	2	100.00	Using index
Warnings:
557
Note	1003	select `test`.`t1`.`numreponse` AS `numreponse` from `test`.`t1` where ((`test`.`t1`.`numeropost` = '1') and (`test`.`t1`.`numreponse` = (select 1 from `test`.`t1` where (`test`.`t1`.`numeropost` = '1'))))
unknown's avatar
unknown committed
558
SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT 1 FROM t1 WHERE numeropost='1');
559 560 561 562 563
ERROR 21000: Subquery returns more than 1 row
EXPLAIN EXTENDED SELECT MAX(numreponse) FROM t1 WHERE numeropost='1';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
564
Note	1003	select max(`test`.`t1`.`numreponse`) AS `MAX(numreponse)` from `test`.`t1` where (`test`.`t1`.`numeropost` = '1')
565 566
EXPLAIN EXTENDED SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT MAX(numreponse) FROM t1 WHERE numeropost='1');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
unknown's avatar
unknown committed
567
1	PRIMARY	t1	const	PRIMARY,numreponse	PRIMARY	7	const,const	1	100.00	Using where; Using index
568 569
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
570
Note	1003	select `test`.`t1`.`numreponse` AS `numreponse` from `test`.`t1` where ((`test`.`t1`.`numeropost` = '1') and (`test`.`t1`.`numreponse` = (select max(`test`.`t1`.`numreponse`) from `test`.`t1` where (`test`.`t1`.`numeropost` = '1'))))
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drop table t1;
CREATE TABLE t1 (a int(1));
INSERT INTO t1 VALUES (1);
SELECT 1 FROM (SELECT a FROM t1) b HAVING (SELECT b.a)=1;
1
1
drop table t1;
create table t1 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t1 values (0, 10),(1, 11),(2, 12);
insert into t2 values (1, 21),(2, 22),(3, 23);
select * from t1;
a	b
0	10
1	11
2	12
update t1 set b= (select b from t1);
ERROR HY000: You can't specify target table 't1' for update in FROM clause
update t1 set b= (select b from t2);
ERROR 21000: Subquery returns more than 1 row
update t1 set b= (select b from t2 where t1.a = t2.a);
select * from t1;
a	b
0	NULL
1	21
2	22
drop table t1, t2;
create table t1 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t1 values (0, 10),(1, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t1;
a	b
0	10
1	11
2	12
select * from t1 where b = (select b from t2 where t1.a = t2.a);
a	b
2	12
delete from t1 where b in (select b from t1);
ERROR HY000: You can't specify target table 't1' for update in FROM clause
delete from t1 where b = (select b from t2);
ERROR 21000: Subquery returns more than 1 row
delete from t1 where b = (select b from t2 where t1.a = t2.a);
select * from t1;
a	b
0	10
1	11
drop table t1, t2;
create table t11 (a int NOT NULL, b int, primary key (a));
create table t12 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t11 values (0, 10),(1, 11),(2, 12);
insert into t12 values (33, 10),(22, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t11;
a	b
0	10
1	11
2	12
select * from t12;
a	b
33	10
22	11
2	12
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t12 where t11.a = t12.a);
ERROR HY000: You can't specify target table 't12' for update in FROM clause
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2);
ERROR 21000: Subquery returns more than 1 row
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2 where t11.a = t2.a);
select * from t11;
a	b
0	10
1	11
select * from t12;
a	b
33	10
22	11
drop table t11, t12, t2;
CREATE TABLE t1 (x int) ENGINE=MyISAM;
create table t2 (a int) ENGINE=MyISAM;
create table t3 (b int);
insert into t2 values (1);
insert into t3 values (1),(2);
INSERT INTO t1 (x) VALUES ((SELECT x FROM t1));
ERROR HY000: You can't specify target table 't1' for update in FROM clause
INSERT INTO t1 (x) VALUES ((SELECT b FROM t3));
ERROR 21000: Subquery returns more than 1 row
INSERT INTO t1 (x) VALUES ((SELECT a FROM t2));
select * from t1;
x
1
insert into t2 values (1);
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
select * from t1;
x
1
2
INSERT INTO t1 (x) select (SELECT SUM(a)+1 FROM t2) FROM t2;
select * from t1;
x
1
2
3
3
INSERT INTO t1 (x) select (SELECT SUM(x)+2 FROM t1) FROM t2;
select * from t1;
x
1
2
3
3
11
11
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
ERROR 42S22: Unknown column 'x' in 'field list'
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
select * from t1;
x
1
2
3
3
11
11
2
drop table t1, t2, t3;
CREATE TABLE t1 (x int not null, y int, primary key (x)) ENGINE=MyISAM;
create table t2 (a int);
create table t3 (a int);
insert into t2 values (1);
insert into t3 values (1),(2);
select * from t1;
x	y
replace into t1 (x, y) VALUES ((SELECT x FROM t1), (SELECT a+1 FROM t2));
ERROR HY000: You can't specify target table 't1' for update in FROM clause
replace into t1 (x, y) VALUES ((SELECT a FROM t3), (SELECT a+1 FROM t2));
ERROR 21000: Subquery returns more than 1 row
replace into t1 (x, y) VALUES ((SELECT a FROM t2), (SELECT a+1 FROM t2));
select * from t1;
x	y
1	2
replace into t1 (x, y) VALUES ((SELECT a FROM t2), (SELECT a+2 FROM t2));
select * from t1;
x	y
1	3
replace DELAYED into t1 (x, y) VALUES ((SELECT a+3 FROM t2), (SELECT a FROM t2));
select * from t1;
x	y
1	3
4	1
replace DELAYED into t1 (x, y) VALUES ((SELECT a+3 FROM t2), (SELECT a+1 FROM t2));
select * from t1;
x	y
1	3
4	2
replace LOW_PRIORITY into t1 (x, y) VALUES ((SELECT a+1 FROM t2), (SELECT a FROM t2));
select * from t1;
x	y
1	3
4	2
2	1
drop table t1, t2, t3;
SELECT * FROM (SELECT 1) b WHERE 1 IN (SELECT *);
ERROR HY000: No tables used
CREATE TABLE t2 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t2 VALUES (1),(2);
SELECT * FROM t2 WHERE id IN (SELECT 1);
id
1
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ref	id	id	5	const	1	100.00	Using index
Warnings:
Note	1249	Select 2 was reduced during optimization
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where (`test`.`t2`.`id` = 1)
SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
id
1
SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
id
2
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ref	id	id	5	const	1	100.00	Using index
Warnings:
Note	1249	Select 3 was reduced during optimization
Note	1249	Select 2 was reduced during optimization
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where (`test`.`t2`.`id` = (1 + 1))
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	NULL	id	5	NULL	2	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
3	DEPENDENT UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
767
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`id`,<exists>(select 1 having (<cache>(`test`.`t2`.`id`) = <ref_null_helper>(1)) union select 3 having (<cache>(`test`.`t2`.`id`) = <ref_null_helper>(3))))
768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914
SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 3);
id
SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 2);
id
2
INSERT INTO t2 VALUES ((SELECT * FROM t2));
ERROR HY000: You can't specify target table 't2' for update in FROM clause
INSERT INTO t2 VALUES ((SELECT id FROM t2));
ERROR HY000: You can't specify target table 't2' for update in FROM clause
SELECT * FROM t2;
id
1
2
CREATE TABLE t1 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 values (1),(1);
UPDATE t2 SET id=(SELECT * FROM t1);
ERROR 21000: Subquery returns more than 1 row
drop table t2, t1;
create table t1 (a int);
insert into t1 values (1),(2),(3);
select 1 IN (SELECT * from t1);
1 IN (SELECT * from t1)
1
select 10 IN (SELECT * from t1);
10 IN (SELECT * from t1)
0
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
NULL
update t1 set a=NULL where a=2;
select 1 IN (SELECT * from t1);
1 IN (SELECT * from t1)
1
select 3 IN (SELECT * from t1);
3 IN (SELECT * from t1)
1
select 10 IN (SELECT * from t1);
10 IN (SELECT * from t1)
NULL
select 1 > ALL (SELECT * from t1);
1 > ALL (SELECT * from t1)
0
select 10 > ALL (SELECT * from t1);
10 > ALL (SELECT * from t1)
NULL
select 1 > ANY (SELECT * from t1);
1 > ANY (SELECT * from t1)
NULL
select 10 > ANY (SELECT * from t1);
10 > ANY (SELECT * from t1)
1
drop table t1;
create table t1 (a varchar(20));
insert into t1 values ('A'),('BC'),('DEF');
select 'A' IN (SELECT * from t1);
'A' IN (SELECT * from t1)
1
select 'XYZS' IN (SELECT * from t1);
'XYZS' IN (SELECT * from t1)
0
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
NULL
update t1 set a=NULL where a='BC';
select 'A' IN (SELECT * from t1);
'A' IN (SELECT * from t1)
1
select 'DEF' IN (SELECT * from t1);
'DEF' IN (SELECT * from t1)
1
select 'XYZS' IN (SELECT * from t1);
'XYZS' IN (SELECT * from t1)
NULL
select 'A' > ALL (SELECT * from t1);
'A' > ALL (SELECT * from t1)
0
select 'XYZS' > ALL (SELECT * from t1);
'XYZS' > ALL (SELECT * from t1)
NULL
select 'A' > ANY (SELECT * from t1);
'A' > ANY (SELECT * from t1)
NULL
select 'XYZS' > ANY (SELECT * from t1);
'XYZS' > ANY (SELECT * from t1)
1
drop table t1;
create table t1 (a float);
insert into t1 values (1.5),(2.5),(3.5);
select 1.5 IN (SELECT * from t1);
1.5 IN (SELECT * from t1)
1
select 10.5 IN (SELECT * from t1);
10.5 IN (SELECT * from t1)
0
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
NULL
update t1 set a=NULL where a=2.5;
select 1.5 IN (SELECT * from t1);
1.5 IN (SELECT * from t1)
1
select 3.5 IN (SELECT * from t1);
3.5 IN (SELECT * from t1)
1
select 10.5 IN (SELECT * from t1);
10.5 IN (SELECT * from t1)
NULL
select 1.5 > ALL (SELECT * from t1);
1.5 > ALL (SELECT * from t1)
0
select 10.5 > ALL (SELECT * from t1);
10.5 > ALL (SELECT * from t1)
NULL
select 1.5 > ANY (SELECT * from t1);
1.5 > ANY (SELECT * from t1)
NULL
select 10.5 > ANY (SELECT * from t1);
10.5 > ANY (SELECT * from t1)
1
explain extended select (select a+1) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
Warnings:
Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
Note	1249	Select 2 was reduced during optimization
Note	1003	select (`test`.`t1`.`a` + 1) AS `(select a+1)` from `test`.`t1`
select (select a+1) from t1;
(select a+1)
2.5
NULL
4.5
drop table t1;
CREATE TABLE t1 (a int(11) NOT NULL default '0', PRIMARY KEY  (a));
CREATE TABLE t2 (a int(11) default '0', INDEX (a));
INSERT INTO t1 VALUES (1),(2),(3),(4);
INSERT INTO t2 VALUES (1),(2),(3);
SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
a	t1.a in (select t2.a from t2)
1	1
2	1
3	1
4	0
explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
Warnings:
915
Note	1003	select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
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CREATE TABLE t3 (a int(11) default '0');
INSERT INTO t3 VALUES (1),(2),(3);
SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
a	t1.a in (select t2.a from t2,t3 where t3.a=t2.a)
1	1
2	1
3	1
4	0
explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
2	DEPENDENT SUBQUERY	t2	ref_or_null	a	a	5	func	2	100.00	Using where; Using index
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)
Warnings:
930
Note	1003	select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
931
drop table t1,t2,t3;
unknown's avatar
unknown committed
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# check correct NULL Processing for normal IN/ALL/ANY
# and 2 ways of max/min optimization
create table t1 (a int);
insert into t1 values (1), (100), (NULL), (1000);
create table t2 (a int not null);
# subselect returns empty set (for NULL and non-NULL left part)
select a, a in (select * from t2) from t1;
a	a in (select * from t2)
1	0
100	0
NULL	0
1000	0
select a, a > any (select * from t2) from t1;
a	a > any (select * from t2)
1	0
100	0
NULL	0
1000	0
select a, a > all (select * from t2) from t1;
a	a > all (select * from t2)
1	1
100	1
NULL	1
1000	1
select a from t1 where a in (select * from t2);
a
select a from t1 where a > any (select * from t2);
a
select a from t1 where a > all (select * from t2);
a
1
100
NULL
1000
select a from t1 where a in (select * from t2 group by a);
a
select a from t1 where a > any (select * from t2 group by a);
a
select a from t1 where a > all (select * from t2 group by a);
a
1
100
NULL
1000
insert into t2 values (1),(200);
# sebselect returns non-empty set without NULLs
select a, a in (select * from t2) from t1;
a	a in (select * from t2)
1	1
100	0
NULL	NULL
1000	0
select a, a > any (select * from t2) from t1;
a	a > any (select * from t2)
1	0
100	1
NULL	NULL
1000	1
select a, a > all (select * from t2) from t1;
a	a > all (select * from t2)
1	0
100	0
NULL	NULL
1000	1
select a from t1 where a in (select * from t2);
a
1
select a from t1 where a > any (select * from t2);
a
100
1000
select a from t1 where a > all (select * from t2);
a
1000
select a from t1 where a in (select * from t2 group by a);
a
1
select a from t1 where a > any (select * from t2 group by a);
a
100
1000
select a from t1 where a > all (select * from t2 group by a);
a
1000
drop table t2;
create table t2 (a int);
insert into t2 values (1),(NULL),(200);
# sebselect returns non-empty set with NULLs
select a, a in (select * from t2) from t1;
a	a in (select * from t2)
1	1
100	NULL
NULL	NULL
1000	NULL
select a, a > any (select * from t2) from t1;
a	a > any (select * from t2)
1	NULL
100	1
NULL	NULL
1000	1
select a, a > all (select * from t2) from t1;
a	a > all (select * from t2)
1	0
100	0
NULL	NULL
1000	NULL
select a from t1 where a in (select * from t2);
a
1
select a from t1 where a > any (select * from t2);
a
100
1000
select a from t1 where a > all (select * from t2);
a
select a from t1 where a in (select * from t2 group by a);
a
1
select a from t1 where a > any (select * from t2 group by a);
a
100
1000
select a from t1 where a > all (select * from t2 group by a);
a
drop table t1, t2;
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create table t1 (a float);
select 10.5 IN (SELECT * from t1 LIMIT 1);
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
drop table t1;
create table t1 (a int, b int, c varchar(10));
create table t2 (a int);
insert into t1 values (1,2,'a'),(2,3,'b'),(3,4,'c');
insert into t2 values (1),(2),(NULL);
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,2,'a'),(select c from t1 where a=t2.a)  from t2;
a	(select a,b,c from t1 where t1.a=t2.a) = ROW(a,2,'a')	(select c from t1 where a=t2.a)
1	1	a
2	0	b
NULL	NULL	NULL
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,3,'b'),(select c from t1 where a=t2.a) from t2;
a	(select a,b,c from t1 where t1.a=t2.a) = ROW(a,3,'b')	(select c from t1 where a=t2.a)
1	0	a
2	1	b
NULL	NULL	NULL
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,4,'c'),(select c from t1 where a=t2.a) from t2;
a	(select a,b,c from t1 where t1.a=t2.a) = ROW(a,4,'c')	(select c from t1 where a=t2.a)
1	0	a
2	0	b
NULL	NULL	NULL
drop table t1,t2;
create table t1 (a int, b real, c varchar(10));
insert into t1 values (1, 1, 'a'), (2,2,'b'), (NULL, 2, 'b');
select ROW(1, 1, 'a') IN (select a,b,c from t1);
ROW(1, 1, 'a') IN (select a,b,c from t1)
1
select ROW(1, 2, 'a') IN (select a,b,c from t1);
ROW(1, 2, 'a') IN (select a,b,c from t1)
0
select ROW(1, 1, 'a') IN (select b,a,c from t1);
ROW(1, 1, 'a') IN (select b,a,c from t1)
1
select ROW(1, 1, 'a') IN (select a,b,c from t1 where a is not null);
ROW(1, 1, 'a') IN (select a,b,c from t1 where a is not null)
1
select ROW(1, 2, 'a') IN (select a,b,c from t1 where a is not null);
ROW(1, 2, 'a') IN (select a,b,c from t1 where a is not null)
0
select ROW(1, 1, 'a') IN (select b,a,c from t1 where a is not null);
ROW(1, 1, 'a') IN (select b,a,c from t1 where a is not null)
1
select ROW(1, 1, 'a') IN (select a,b,c from t1 where c='b' or c='a');
ROW(1, 1, 'a') IN (select a,b,c from t1 where c='b' or c='a')
1
select ROW(1, 2, 'a') IN (select a,b,c from t1 where c='b' or c='a');
ROW(1, 2, 'a') IN (select a,b,c from t1 where c='b' or c='a')
0
select ROW(1, 1, 'a') IN (select b,a,c from t1 where c='b' or c='a');
ROW(1, 1, 'a') IN (select b,a,c from t1 where c='b' or c='a')
1
select ROW(1, 1, 'a') IN (select b,a,c from t1 limit 2);
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
drop table t1;
create table t1 (a int);
insert into t1 values (1);
do @a:=(SELECT a from t1);
select @a;
@a
1
set @a:=2;
set @a:=(SELECT a from t1);
select @a;
@a
1
drop table t1;
do (SELECT a from t1);
ERROR 42S02: Table 'test.t1' doesn't exist
set @a:=(SELECT a from t1);
ERROR 42S02: Table 'test.t1' doesn't exist
CREATE TABLE t1 (a int, KEY(a));
HANDLER t1 OPEN;
HANDLER t1 READ a=((SELECT 1));
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT 1))' at line 1
HANDLER t1 CLOSE;
drop table t1;
create table t1 (a int);
create table t2 (b int);
insert into t1 values (1),(2);
insert into t2 values (1);
select a from t1 where a in (select a from t1 where a in (select b from t2));
a
1
drop table t1, t2;
create table t1 (a int, b int);
create table t2 like t1;
insert into t1 values (1,2),(1,3),(1,4),(1,5);
insert into t2 values (1,2),(1,3);
select * from t1 where row(a,b) in (select a,b from t2);
a	b
1	2
1	3
drop table t1, t2;
CREATE TABLE `t1` (`i` int(11) NOT NULL default '0',PRIMARY KEY  (`i`)) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES (1);
UPDATE t1 SET i=i+1 WHERE i=(SELECT MAX(i));
select * from t1;
i
2
drop table t1;
CREATE TABLE t1 (a int(1));
EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
Note	1003	select (select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
Note	1003	select (select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
Note	1003	select (select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
drop table t1;
CREATE TABLE `t1` (
`mot` varchar(30) character set latin1 NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`),
KEY `pseudo` (`pseudo`,`date`,`topic`),
KEY `topic` (`topic`)
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
CREATE TABLE `t2` (
`mot` varchar(30) character set latin1 NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`),
KEY `pseudo` (`pseudo`,`date`,`topic`),
KEY `topic` (`topic`)
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
CREATE TABLE `t3` (
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES ('joce','1','','joce'),('test','2','','test');
Warnings:
Warning	1265	Data truncated for column 'date' at row 1
Warning	1265	Data truncated for column 'date' at row 2
INSERT INTO t2 VALUES ('joce','1','','joce'),('test','2','','test');
Warnings:
Warning	1265	Data truncated for column 'date' at row 1
Warning	1265	Data truncated for column 'date' at row 2
INSERT INTO t3 VALUES (1,1);
SELECT DISTINCT topic FROM t2 WHERE NOT EXISTS(SELECT * FROM t3 WHERE
numeropost=topic);
topic
2
select * from t1;
mot	topic	date	pseudo
joce	1	0000-00-00	joce
test	2	0000-00-00	test
DELETE FROM t1 WHERE topic IN (SELECT DISTINCT topic FROM t2 WHERE NOT
EXISTS(SELECT * FROM t3 WHERE numeropost=topic));
select * from t1;
mot	topic	date	pseudo
joce	1	0000-00-00	joce
drop table t1, t2, t3;
SELECT * FROM (SELECT 1 as a,(SELECT a)) a;
a	(SELECT a)
1	1
CREATE TABLE t1 SELECT * FROM (SELECT 1 as a,(SELECT 1)) a;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT 1)` int(1) NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
CREATE TABLE t1 SELECT * FROM (SELECT 1 as a,(SELECT a)) a;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT a)` int(1) NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
CREATE TABLE t1 SELECT * FROM (SELECT 1 as a,(SELECT a+0)) a;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT a+0)` int(3) NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
CREATE TABLE t1 SELECT (SELECT 1 as a UNION SELECT 1+1 limit 1,1) as a;
select * from t1;
a
2
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` bigint(20) NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (a int);
insert into t1 values (1), (2), (3);
explain extended select a,(select (select rand() from t1 limit 1)  from t1 limit 1)
from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	UNCACHEABLE SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
3	UNCACHEABLE SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,(select (select rand() from `test`.`t1` limit 1) from `test`.`t1` limit 1) AS `(select (select rand() from t1 limit 1)  from t1 limit 1)` from `test`.`t1`
drop table t1;
select t1.Continent, t2.Name, t2.Population from t1 LEFT JOIN t2 ON t1.Code = t2.Country  where t2.Population IN (select max(t2.Population) AS Population from t2, t1 where t2.Country = t1.Code group by Continent);
ERROR 42S02: Table 'test.t1' doesn't exist
CREATE TABLE t1 (
ID int(11) NOT NULL auto_increment,
name char(35) NOT NULL default '',
t2 char(3) NOT NULL default '',
District char(20) NOT NULL default '',
Population int(11) NOT NULL default '0',
PRIMARY KEY  (ID)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (130,'Sydney','AUS','New South Wales',3276207);
INSERT INTO t1 VALUES (131,'Melbourne','AUS','Victoria',2865329);
INSERT INTO t1 VALUES (132,'Brisbane','AUS','Queensland',1291117);
CREATE TABLE t2 (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL default 'Asia',
Region char(26) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
IndepYear smallint(6) default NULL,
Population int(11) NOT NULL default '0',
LifeExpectancy float(3,1) default NULL,
GNP float(10,2) default NULL,
GNPOld float(10,2) default NULL,
LocalName char(45) NOT NULL default '',
GovernmentForm char(45) NOT NULL default '',
HeadOfState char(60) default NULL,
Capital int(11) default NULL,
Code2 char(2) NOT NULL default '',
PRIMARY KEY  (Code)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('AUS','Australia','Oceania','Australia and New Zealand',7741220.00,1901,18886000,79.8,351182.00,392911.00,'Australia','Constitutional Monarchy, Federation','Elisabeth II',135,'AU');
INSERT INTO t2 VALUES ('AZE','Azerbaijan','Asia','Middle East',86600.00,1991,7734000,62.9,4127.00,4100.00,'Azärbaycan','Federal Republic','Heydär Äliyev',144,'AZ');
select t2.Continent, t1.Name, t1.Population from t2 LEFT JOIN t1 ON t2.Code = t1.t2  where t1.Population IN (select max(t1.Population) AS Population from t1, t2 where t1.t2 = t2.Code group by Continent);
Continent	Name	Population
Oceania	Sydney	3276207
drop table t1, t2;
CREATE TABLE `t1` (
`id` mediumint(8) unsigned NOT NULL auto_increment,
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`id`),
UNIQUE KEY `pseudo` (`pseudo`)
) ENGINE=MyISAM PACK_KEYS=1 ROW_FORMAT=DYNAMIC;
INSERT INTO t1 (pseudo) VALUES ('test');
SELECT 0 IN (SELECT 1 FROM t1 a);
0 IN (SELECT 1 FROM t1 a)
0
EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (0 = 1))) AS `0 IN (SELECT 1 FROM t1 a)`
INSERT INTO t1 (pseudo) VALUES ('test1');
SELECT 0 IN (SELECT 1 FROM t1 a);
0 IN (SELECT 1 FROM t1 a)
0
EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (0 = 1))) AS `0 IN (SELECT 1 FROM t1 a)`
drop table t1;
CREATE TABLE `t1` (
`i` int(11) NOT NULL default '0',
PRIMARY KEY  (`i`)
) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES (1);
UPDATE t1 SET i=i+(SELECT MAX(i) FROM (SELECT 1) t) WHERE i=(SELECT MAX(i));
UPDATE t1 SET i=i+1 WHERE i=(SELECT MAX(i));
UPDATE t1 SET t.i=i+(SELECT MAX(i) FROM (SELECT 1) t);
ERROR 42S22: Unknown column 't.i' in 'field list'
select * from t1;
i
3
drop table t1;
CREATE TABLE t1 (
id int(11) default NULL
) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES (1),(1),(2),(2),(1),(3);
CREATE TABLE t2 (
id int(11) default NULL,
name varchar(15) default NULL
) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t2 VALUES (4,'vita'), (1,'vita'), (2,'vita'), (1,'vita');
update t1, t2 set t2.name='lenka' where t2.id in (select id from t1);
select * from t2;
id	name
4	vita
1	lenka
2	lenka
1	lenka
drop table t1,t2;
create table t1 (a int, unique index indexa (a));
insert into t1 values (-1), (-4), (-2), (NULL);
select -10 IN (select a from t1 FORCE INDEX (indexa));
-10 IN (select a from t1 FORCE INDEX (indexa))
NULL
drop table t1;
create table t1 (id int not null auto_increment primary key, salary int, key(salary));
insert into t1 (salary) values (100),(1000),(10000),(10),(500),(5000),(50000);
explain extended SELECT id FROM t1 where salary = (SELECT MAX(salary) FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ref	salary	salary	5	const	0	0.00	Using index condition
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
Warnings:
Note	1003	select `test`.`t1`.`id` AS `id` from `test`.`t1` where (`test`.`t1`.`salary` = (select max(`test`.`t1`.`salary`) from `test`.`t1`))
drop table t1;
CREATE TABLE t1 (
ID int(10) unsigned NOT NULL auto_increment,
SUB_ID int(3) unsigned NOT NULL default '0',
REF_ID int(10) unsigned default NULL,
REF_SUB int(3) unsigned default '0',
PRIMARY KEY (ID,SUB_ID),
UNIQUE KEY t1_PK (ID,SUB_ID),
KEY t1_FK (REF_ID,REF_SUB),
KEY t1_REFID (REF_ID)
) ENGINE=MyISAM CHARSET=cp1251;
INSERT INTO t1 VALUES (1,0,NULL,NULL),(2,0,NULL,NULL);
SELECT DISTINCT REF_ID FROM t1 WHERE ID= (SELECT DISTINCT REF_ID FROM t1 WHERE ID=2);
REF_ID
DROP TABLE t1;
create table t1 (a int, b int);
create table t2 (a int, b int);
insert into t1 values (1,0), (2,0), (3,0);
insert into t2 values (1,1), (2,1), (3,1), (2,2);
update ignore t1 set b=(select b from t2 where t1.a=t2.a);
Warnings:
Error	1242	Subquery returns more than 1 row
select * from t1;
a	b
1	1
2	NULL
3	1
drop table t1, t2;
CREATE TABLE `t1` (
`id` mediumint(8) unsigned NOT NULL auto_increment,
`pseudo` varchar(35) NOT NULL default '',
`email` varchar(60) NOT NULL default '',
PRIMARY KEY  (`id`),
UNIQUE KEY `email` (`email`),
UNIQUE KEY `pseudo` (`pseudo`)
) ENGINE=MyISAM CHARSET=latin1 PACK_KEYS=1 ROW_FORMAT=DYNAMIC;
INSERT INTO t1 (id,pseudo,email) VALUES (1,'test','test'),(2,'test1','test1');
SELECT pseudo as a, pseudo as b FROM t1 GROUP BY (SELECT a) ORDER BY (SELECT id*1);
a	b
test	test
test1	test1
drop table if exists t1;
(SELECT 1 as a) UNION (SELECT 1) ORDER BY (SELECT a+0);
a
1
create table t1 (a int not null, b int, primary key (a));
create table t2 (a int not null, primary key (a));
create table t3 (a int not null, b int, primary key (a));
insert into t1 values (1,10), (2,20), (3,30),  (4,40);
insert into t2 values (2), (3), (4), (5);
insert into t3 values (10,3), (20,4), (30,5);
select * from t2 where t2.a in (select a from t1);
a
2
3
4
explain extended select * from t2 where t2.a in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	PRIMARY	PRIMARY	4	NULL	4	100.00	Using index
1	PRIMARY	t1	index	PRIMARY	PRIMARY	4	NULL	4	75.00	Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
4
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	PRIMARY	PRIMARY	4	NULL	4	100.00	Using index
1	PRIMARY	t1	ALL	PRIMARY	NULL	NULL	NULL	4	75.00	Using where; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
a
2
3
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	PRIMARY	PRIMARY	4	NULL	4	100.00	Using index
1	PRIMARY	t1	ALL	PRIMARY	NULL	NULL	NULL	4	75.00	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	100.00	Using index
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`))
drop table t1, t2, t3;
create table t1 (a int, b int, index a (a,b));
create table t2 (a int, index a (a));
create table t3 (a int, b int, index a (a));
insert into t1 values (1,10), (2,20), (3,30), (4,40);
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
insert into t1
select rand()*100000+200,rand()*100000 from t0 A, t0 B, t0 C, t0 D;
insert into t2 values (2), (3), (4), (5);
insert into t3 values (10,3), (20,4), (30,5);
select * from t2 where t2.a in (select a from t1);
a
2
3
4
explain extended select * from t2 where t2.a in (select a from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
1	PRIMARY	t1	ref	a	a	5	test.t2.a	101	100.00	Using index; FirstMatch(t2)
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `test`.`t2`.`a`)
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
4
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
1	PRIMARY	t1	ref	a	a	5	test.t2.a	101	100.00	Using where; Using index; FirstMatch(t2)
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
a
2
3
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
1	PRIMARY	t3	index	a	a	5	NULL	3	100.00	Using where; Using index
1	PRIMARY	t1	ref	a	a	10	test.t2.a,test.t3.a	116	100.00	Using index; FirstMatch(t2)
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` = `test`.`t3`.`a`))
insert into t1 values (3,31);
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
3
4
select * from t2 where t2.a in (select a from t1 where t1.b <> 30 and t1.b <> 31);
a
2
4
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using where; Using index
1	PRIMARY	t1	ref	a	a	5	test.t2.a	101	100.00	Using where; Using index; FirstMatch(t2)
Warnings:
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
drop table t0, t1, t2, t3;
create table t1 (a int, b int);
create table t2 (a int, b int);
create table t3 (a int, b int);
insert into t1 values (0,100),(1,2), (1,3), (2,2), (2,7), (2,-1), (3,10);
insert into t2 values (0,0), (1,1), (2,1), (3,1), (4,1);
insert into t3 values (3,3), (2,2), (1,1);
select a,(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1) from t3;
a	(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1)
3	1
2	2
1	2
drop table t1,t2,t3;
create table t1 (s1 int);
create table t2 (s1 int);
insert into t1 values (1);
insert into t2 values (1);
select * from t1 where exists (select s1 from t2 having max(t2.s1)=t1.s1);
s1
1
drop table t1,t2;
create table t1 (s1 int);
create table t2 (s1 int);
insert into t1 values (1);
insert into t2 values (1);
update t1 set  s1 = s1 + 1 where 1 = (select x.s1 as A from t2 WHERE t2.s1 > t1.s1 order by A);
ERROR 42S22: Unknown column 'x.s1' in 'field list'
DROP TABLE t1, t2;
CREATE TABLE t1 (s1 CHAR(5) COLLATE latin1_german1_ci,
s2 CHAR(5) COLLATE latin1_swedish_ci);
INSERT INTO t1 VALUES ('z','?');
select * from t1 where s1 > (select max(s2) from t1);
ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '>'
select * from t1 where s1 > any (select max(s2) from t1);
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ERROR HY000: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (latin1_german1_ci,IMPLICIT) for operation '<'
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drop table t1;
create table t1(toid int,rd int);
create table t2(userid int,pmnew int,pmtotal int);
insert into t2 values(1,0,0),(2,0,0);
insert into t1 values(1,0),(1,0),(1,0),(1,12),(1,15),(1,123),(1,12312),(1,12312),(1,123),(2,0),(2,0),(2,1),(2,2);
select userid,pmtotal,pmnew, (select count(rd) from t1 where toid=t2.userid) calc_total, (select count(rd) from t1 where rd=0 and toid=t2.userid) calc_new from t2 where userid in (select distinct toid from t1);
userid	pmtotal	pmnew	calc_total	calc_new
1	0	0	9	3
2	0	0	4	2
drop table t1, t2;
create table t1 (s1 char(5));
select (select 'a','b' from t1 union select 'a','b' from t1) from t1;
ERROR 21000: Operand should contain 1 column(s)
insert into t1 values ('tttt');
select * from t1 where ('a','b')=(select 'a','b' from t1 union select 'a','b' from t1);
s1
tttt
explain extended (select * from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	100.00	
Warnings:
Note	1003	(select 'tttt' AS `s1` from `test`.`t1`)
(select * from t1);
s1
tttt
drop table t1;
create table t1 (s1 char(5), index s1(s1));
create table t2 (s1 char(5), index s1(s1));
insert into t1 values ('a1'),('a2'),('a3');
insert into t2 values ('a1'),('a2');
select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
s1	s1 NOT IN (SELECT s1 FROM t2)
a1	0
a2	0
a3	1
select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
s1	s1 = ANY (SELECT s1 FROM t2)
a1	1
a2	1
a3	0
select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
s1	s1 <> ALL (SELECT s1 FROM t2)
a1	0
a2	0
a3	1
select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
s1	s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')
a1	0
a2	1
a3	1
explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
Warnings:
1616
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
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explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
Warnings:
1622
Note	1003	select `test`.`t1`.`s1` AS `s1`,<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
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explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
Warnings:
1628
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
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explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
Warnings:
1634
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where (`test`.`t2`.`s1` < 'a2') having trigcond(<is_not_null_test>(`test`.`t2`.`s1`))))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
1635
drop table t1,t2;
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create table t2 (a int, b int not null);
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create table t3 (a int);
insert into t3 values (6),(7),(3);
select * from t3 where a >= all (select b from t2);
a
6
7
3
explain extended select * from t3 where a >= all (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,((select max(NULL) from `test`.`t2`) > <cache>(`test`.`t3`.`a`))))
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select * from t3 where a >= some (select b from t2);
a
explain extended select * from t3 where a >= some (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,((select min(NULL) from `test`.`t2`) <= <cache>(`test`.`t3`.`a`))))
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select * from t3 where a >= all (select b from t2 group by 1);
a
6
7
3
explain extended select * from t3 where a >= all (select b from t2 group by 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(<max>(select NULL from `test`.`t2` group by 1) > <cache>(`test`.`t3`.`a`))))
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select * from t3 where a >= some (select b from t2 group by 1);
a
explain extended select * from t3 where a >= some (select b from t2 group by 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(<min>(select NULL from `test`.`t2` group by 1) <= <cache>(`test`.`t3`.`a`))))
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select * from t3 where NULL >= any (select b from t2);
a
explain extended select * from t3 where NULL >= any (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,((select min(NULL) from `test`.`t2`) <= NULL)))
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select * from t3 where NULL >= any (select b from t2 group by 1);
a
explain extended select * from t3 where NULL >= any (select b from t2 group by 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(<min>(select NULL from `test`.`t2` group by 1) <= NULL)))
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select * from t3 where NULL >= some (select b from t2);
a
explain extended select * from t3 where NULL >= some (select b from t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
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Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,((select min(NULL) from `test`.`t2`) <= NULL)))
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select * from t3 where NULL >= some (select b from t2 group by 1);
a
explain extended select * from t3 where NULL >= some (select b from t2 group by 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
Warnings:
unknown's avatar
unknown committed
1708
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(<min>(select NULL from `test`.`t2` group by 1) <= NULL)))
1709 1710 1711 1712 1713 1714 1715 1716 1717 1718
insert into t2 values (2,2), (2,1), (3,3), (3,1);
select * from t3 where a > all (select max(b) from t2 group by a);
a
6
7
explain extended select * from t3 where a > all (select max(b) from t2 group by a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	4	100.00	Using temporary
Warnings:
unknown's avatar
unknown committed
1719
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(<max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`) >= <cache>(`test`.`t3`.`a`))))
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drop table t2, t3;
CREATE TABLE `t1` ( `id` mediumint(9) NOT NULL auto_increment, `taskid` bigint(20) NOT NULL default '0', `dbid` int(11) NOT NULL default '0', `create_date` datetime NOT NULL default '0000-00-00 00:00:00', `last_update` datetime NOT NULL default '0000-00-00 00:00:00', PRIMARY KEY  (`id`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=3 ;
INSERT INTO `t1` (`id`, `taskid`, `dbid`, `create_date`,`last_update`) VALUES (1, 1, 15, '2003-09-29 10:31:36', '2003-09-29 10:31:36'), (2, 1, 21, now(), now());
CREATE TABLE `t2` (`db_id` int(11) NOT NULL auto_increment,`name` varchar(200) NOT NULL default '',`primary_uid` smallint(6) NOT NULL default '0',`secondary_uid` smallint(6) NOT NULL default '0',PRIMARY KEY  (`db_id`),UNIQUE KEY `name_2` (`name`),FULLTEXT KEY `name` (`name`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=2147483647;
INSERT INTO `t2` (`db_id`, `name`, `primary_uid`, `secondary_uid`) VALUES (18, 'Not Set 1', 0, 0),(19, 'Valid', 1, 2),(20, 'Valid 2', 1, 2),(21, 'Should Not Return', 1, 2),(26, 'Not Set 2', 0, 0),(-1, 'ALL DB\'S', 0, 0);
CREATE TABLE `t3` (`taskgenid` mediumint(9) NOT NULL auto_increment,`dbid` int(11) NOT NULL default '0',`taskid` int(11) NOT NULL default '0',`mon` tinyint(4) NOT NULL default '1',`tues` tinyint(4) NOT NULL default '1',`wed` tinyint(4) NOT NULL default '1',`thur` tinyint(4) NOT NULL default '1',`fri` tinyint(4) NOT NULL default '1',`sat` tinyint(4) NOT NULL default '0',`sun` tinyint(4) NOT NULL default '0',`how_often` smallint(6) NOT NULL default '1',`userid` smallint(6) NOT NULL default '0',`active` tinyint(4) NOT NULL default '1',PRIMARY KEY  (`taskgenid`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=2 ;
INSERT INTO `t3` (`taskgenid`, `dbid`, `taskid`, `mon`, `tues`,`wed`, `thur`, `fri`, `sat`, `sun`, `how_often`, `userid`, `active`) VALUES (1,-1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1);
CREATE TABLE `t4` (`task_id` smallint(6) NOT NULL default '0',`description` varchar(200) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
INSERT INTO `t4` (`task_id`, `description`) VALUES (1, 'Daily Check List'),(2, 'Weekly Status');
select  dbid, name, (date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01') from t3 a, t2 b, t4  WHERE dbid = - 1 AND primary_uid = '1' AND t4.task_id = taskid;
dbid	name	(date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01')
-1	Valid	1
-1	Valid 2	1
-1	Should Not Return	0
SELECT dbid, name FROM t3 a, t2 b, t4 WHERE dbid = - 1 AND primary_uid = '1' AND ((date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01')) AND t4.task_id = taskid;
dbid	name
-1	Valid
-1	Valid 2
drop table t1,t2,t3,t4;
CREATE TABLE t1 (id int(11) default NULL) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES (1),(5);
CREATE TABLE t2 (id int(11) default NULL) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t2 VALUES (2),(6);
select * from t1 where (1,2,6) in (select * from t2);
ERROR 21000: Operand should contain 3 column(s)
DROP TABLE t1,t2;
create table t1 (s1 int);
insert into t1 values (1);
insert into t1 values (2);
set sort_buffer_size = (select s1 from t1);
ERROR 21000: Subquery returns more than 1 row
do (select * from t1);
Warnings:
Error	1242	Subquery returns more than 1 row
drop table t1;
create table t1 (s1 char);
insert into t1 values ('e');
select * from t1 where 'f' > any (select s1 from t1);
s1
e
select * from t1 where 'f' > any (select s1 from t1 union select s1 from t1);
s1
e
explain extended select * from t1 where 'f' > any (select s1 from t1 union select s1 from t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
2	SUBQUERY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
3	UNION	t1	system	NULL	NULL	NULL	NULL	1	100.00	
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
unknown's avatar
unknown committed
1770
Note	1003	select 'e' AS `s1` from `test`.`t1` where <nop>(<in_optimizer>('f',(<min>(select 'e' from `test`.`t1` union select 'e' from `test`.`t1`) < 'f')))
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drop table t1;
CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874');
CREATE TABLE t2 (code char(5) NOT NULL default '',UNIQUE KEY code (code)) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t2 VALUES ('1'),('1226'),('1245'),('1862'),('18623'),('1874'),('1967'),('6');
select c.number as phone,(select p.code from t2 p where c.number like concat(p.code, '%') order by length(p.code) desc limit 1) as code from t1 c;
phone	code
69294728265	6
18621828126	1862
89356874041	NULL
95895001874	NULL
drop table t1, t2;
create table t1 (s1 int);
create table t2 (s1 int);
select * from t1 where (select count(*) from t2 where t1.s2) = 1;
ERROR 42S22: Unknown column 't1.s2' in 'where clause'
select * from t1 where (select count(*) from t2 group by t1.s2) = 1;
ERROR 42S22: Unknown column 't1.s2' in 'group statement'
select count(*) from t2 group by t1.s2;
ERROR 42S22: Unknown column 't1.s2' in 'group statement'
drop table t1, t2;
CREATE TABLE t1(COLA FLOAT NOT NULL,COLB FLOAT NOT NULL,COLC VARCHAR(20) DEFAULT NULL,PRIMARY KEY (COLA, COLB));
CREATE TABLE t2(COLA FLOAT NOT NULL,COLB FLOAT NOT NULL,COLC CHAR(1) NOT NULL,PRIMARY KEY (COLA));
INSERT INTO t1 VALUES (1,1,'1A3240'), (1,2,'4W2365');
INSERT INTO t2 VALUES (100, 200, 'C');
SELECT DISTINCT COLC FROM t1 WHERE COLA = (SELECT COLA FROM t2 WHERE COLB = 200 AND COLC ='C' LIMIT 1);
COLC
DROP TABLE t1, t2;
CREATE TABLE t1 (a int(1));
INSERT INTO t1 VALUES (1),(1),(1),(1),(1),(2),(3),(4),(5);
SELECT DISTINCT (SELECT a) FROM t1 LIMIT 100;
(SELECT a)
1
2
3
4
5
DROP TABLE t1;
create table t1 (a int, b decimal(13, 3));
insert into t1 values (1, 0.123);
select a, (select max(b) from t1) into outfile "../../tmp/subselect.out.file.1" from t1;
delete from t1;
load data infile "../../tmp/subselect.out.file.1" into table t1;
select * from t1;
a	b
1	0.123
drop table t1;
CREATE TABLE `t1` (
`id` int(11) NOT NULL auto_increment,
`id_cns` tinyint(3) unsigned NOT NULL default '0',
`tipo` enum('','UNO','DUE') NOT NULL default '',
`anno_dep` smallint(4) unsigned zerofill NOT NULL default '0000',
`particolare` mediumint(8) unsigned NOT NULL default '0',
`generale` mediumint(8) unsigned NOT NULL default '0',
`bis` tinyint(3) unsigned NOT NULL default '0',
PRIMARY KEY  (`id`),
UNIQUE KEY `idx_cns_gen_anno` (`anno_dep`,`id_cns`,`generale`,`particolare`),
UNIQUE KEY `idx_cns_par_anno` (`id_cns`,`anno_dep`,`tipo`,`particolare`,`bis`)
);
INSERT INTO `t1` VALUES (1,16,'UNO',1987,2048,9681,0),(2,50,'UNO',1987,1536,13987,0),(3,16,'UNO',1987,2432,14594,0),(4,16,'UNO',1987,1792,13422,0),(5,16,'UNO',1987,1025,10240,0),(6,16,'UNO',1987,1026,7089,0);
CREATE TABLE `t2` (
`id` tinyint(3) unsigned NOT NULL auto_increment,
`max_anno_dep` smallint(6) unsigned NOT NULL default '0',
PRIMARY KEY  (`id`)
);
INSERT INTO `t2` VALUES (16,1987),(50,1990),(51,1990);
SELECT cns.id, cns.max_anno_dep, cns.max_anno_dep = (SELECT s.anno_dep FROM t1 AS s WHERE s.id_cns = cns.id ORDER BY s.anno_dep DESC LIMIT 1) AS PIPPO FROM t2 AS cns;
id	max_anno_dep	PIPPO
16	1987	1
50	1990	0
51	1990	NULL
DROP TABLE t1, t2;
create table t1 (a int);
insert into t1 values (1), (2), (3);
SET SQL_SELECT_LIMIT=1;
select sum(a) from (select * from t1) as a;
sum(a)
6
select 2 in (select * from t1);
2 in (select * from t1)
1
SET SQL_SELECT_LIMIT=default;
drop table t1;
CREATE TABLE t1 (a int, b int, INDEX (a));
INSERT INTO t1 VALUES (1, 1), (1, 2), (1, 3);
SELECT * FROM t1 WHERE a = (SELECT MAX(a) FROM t1 WHERE a = 1) ORDER BY b;
a	b
1	1
1	2
1	3
DROP TABLE t1;
create table t1(val varchar(10));
insert into t1 values ('aaa'), ('bbb'),('eee'),('mmm'),('ppp');
select count(*) from t1 as w1 where w1.val in (select w2.val from t1 as w2 where w2.val like 'm%') and w1.val in (select w3.val from t1 as w3 where w3.val like 'e%');
count(*)
0
drop table t1;
create table t1 (id int not null, text varchar(20) not null default '', primary key (id));
insert into t1 (id, text) values (1, 'text1'), (2, 'text2'), (3, 'text3'), (4, 'text4'), (5, 'text5'), (6, 'text6'), (7, 'text7'), (8, 'text8'), (9, 'text9'), (10, 'text10'), (11, 'text11'), (12, 'text12');
select * from t1 where id not in (select id from t1 where id < 8);
id	text
8	text8
9	text9
10	text10
11	text11
12	text12
select * from t1 as tt where not exists (select id from t1 where id < 8 and (id = tt.id or id is null) having id is not null);
id	text
8	text8
9	text9
10	text10
11	text11
12	text12
explain extended select * from t1 where id not in (select id from t1 where id < 8);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	12	100.00	Using where
2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index; Using where
Warnings:
1889
Note	1003	select `test`.`t1`.`id` AS `id`,`test`.`t1`.`text` AS `text` from `test`.`t1` where (not(<in_optimizer>(`test`.`t1`.`id`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`id`) in t1 on PRIMARY where ((`test`.`t1`.`id` < 8) and (<cache>(`test`.`t1`.`id`) = `test`.`t1`.`id`)))))))
1890 1891 1892 1893 1894 1895
explain extended select * from t1 as tt where not exists (select id from t1 where id < 8 and (id = tt.id or id is null) having id is not null);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	tt	ALL	NULL	NULL	NULL	NULL	12	100.00	Using where
2	DEPENDENT SUBQUERY	t1	eq_ref	PRIMARY	PRIMARY	4	test.tt.id	1	100.00	Using where; Using index
Warnings:
Note	1276	Field or reference 'test.tt.id' of SELECT #2 was resolved in SELECT #1
1896
Note	1003	select `test`.`tt`.`id` AS `id`,`test`.`tt`.`text` AS `text` from `test`.`t1` `tt` where (not(exists(select `test`.`t1`.`id` from `test`.`t1` where ((`test`.`t1`.`id` < 8) and (`test`.`t1`.`id` = `test`.`tt`.`id`)) having (`test`.`t1`.`id` is not null))))
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insert into t1 (id, text) values (1000, 'text1000'), (1001, 'text1001');
create table t2 (id int not null, text varchar(20) not null default '', primary key (id));
insert into t2 (id, text) values (1, 'text1'), (2, 'text2'), (3, 'text3'), (4, 'text4'), (5, 'text5'), (6, 'text6'), (7, 'text7'), (8, 'text8'), (9, 'text9'), (10, 'text10'), (11, 'text1'), (12, 'text2'), (13, 'text3'), (14, 'text4'), (15, 'text5'), (16, 'text6'), (17, 'text7'), (18, 'text8'), (19, 'text9'), (20, 'text10'),(21, 'text1'), (22, 'text2'), (23, 'text3'), (24, 'text4'), (25, 'text5'), (26, 'text6'), (27, 'text7'), (28, 'text8'), (29, 'text9'), (30, 'text10'), (31, 'text1'), (32, 'text2'), (33, 'text3'), (34, 'text4'), (35, 'text5'), (36, 'text6'), (37, 'text7'), (38, 'text8'), (39, 'text9'), (40, 'text10'), (41, 'text1'), (42, 'text2'), (43, 'text3'), (44, 'text4'), (45, 'text5'), (46, 'text6'), (47, 'text7'), (48, 'text8'), (49, 'text9'), (50, 'text10');
select * from t1 a left join t2 b on (a.id=b.id or b.id is null) join t1 c on (if(isnull(b.id), 1000, b.id)=c.id);
id	text	id	text	id	text
1	text1	1	text1	1	text1
2	text2	2	text2	2	text2
3	text3	3	text3	3	text3
4	text4	4	text4	4	text4
5	text5	5	text5	5	text5
6	text6	6	text6	6	text6
7	text7	7	text7	7	text7
8	text8	8	text8	8	text8
9	text9	9	text9	9	text9
10	text10	10	text10	10	text10
11	text11	11	text1	11	text11
12	text12	12	text2	12	text12
1000	text1000	NULL	NULL	1000	text1000
1001	text1001	NULL	NULL	1000	text1000
explain extended select * from t1 a left join t2 b on (a.id=b.id or b.id is null) join t1 c on (if(isnull(b.id), 1000, b.id)=c.id);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	a	ALL	NULL	NULL	NULL	NULL	14	100.00	
1	SIMPLE	b	eq_ref	PRIMARY	PRIMARY	4	test.a.id	2	100.00	
1	SIMPLE	c	eq_ref	PRIMARY	PRIMARY	4	func	1	100.00	Using index condition
Warnings:
Note	1003	select `test`.`a`.`id` AS `id`,`test`.`a`.`text` AS `text`,`test`.`b`.`id` AS `id`,`test`.`b`.`text` AS `text`,`test`.`c`.`id` AS `id`,`test`.`c`.`text` AS `text` from `test`.`t1` `a` left join `test`.`t2` `b` on(((`test`.`b`.`id` = `test`.`a`.`id`) or isnull(`test`.`b`.`id`))) join `test`.`t1` `c` where (if(isnull(`test`.`b`.`id`),1000,`test`.`b`.`id`) = `test`.`c`.`id`)
drop table t1,t2;
create table t1 (a int);
insert into t1 values (1);
explain select benchmark(1000, (select a from t1 where a=sha(rand())));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	UNCACHEABLE SUBQUERY	t1	system	NULL	NULL	NULL	NULL	1	
drop table t1;
create table t1(id int);
create table t2(id int);
create table t3(flag int);
select (select * from t3 where id not null) from t1, t2;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'null) from t1, t2' at line 1
drop table t1,t2,t3;
CREATE TABLE t1 (id INT);
CREATE TABLE t2 (id INT);
INSERT INTO t1 VALUES (1), (2);
INSERT INTO t2 VALUES (1);
SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
id	c
1	1
2	0
SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
id	c
1	1
2	0
SELECT t1.id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY t1.id;
id	c
1	1
2	0
SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id) ORDER BY id;
id	c
1	1
2	0
DROP TABLE t1,t2;
CREATE TABLE t1 ( a int, b int );
INSERT INTO t1 VALUES (1,1),(2,2),(3,3);
SELECT a FROM t1 WHERE a > ANY ( SELECT a FROM t1 WHERE b = 2 );
a
3
SELECT a FROM t1 WHERE a < ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
SELECT a FROM t1 WHERE a = ANY ( SELECT a FROM t1 WHERE b = 2 );
a
2
SELECT a FROM t1 WHERE a >= ANY ( SELECT a FROM t1 WHERE b = 2 );
a
2
3
SELECT a FROM t1 WHERE a <= ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
2
SELECT a FROM t1 WHERE a <> ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
3
SELECT a FROM t1 WHERE a > ALL ( SELECT a FROM t1 WHERE b = 2 );
a
3
SELECT a FROM t1 WHERE a < ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
SELECT a FROM t1 WHERE a = ALL ( SELECT a FROM t1 WHERE b = 2 );
a
2
SELECT a FROM t1 WHERE a >= ALL ( SELECT a FROM t1 WHERE b = 2 );
a
2
3
SELECT a FROM t1 WHERE a <= ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
2
SELECT a FROM t1 WHERE a <> ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
3
ALTER TABLE t1 ADD INDEX (a);
SELECT a FROM t1 WHERE a > ANY ( SELECT a FROM t1 WHERE b = 2 );
a
3
SELECT a FROM t1 WHERE a < ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
SELECT a FROM t1 WHERE a = ANY ( SELECT a FROM t1 WHERE b = 2 );
a
2
SELECT a FROM t1 WHERE a >= ANY ( SELECT a FROM t1 WHERE b = 2 );
a
2
3
SELECT a FROM t1 WHERE a <= ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
2
SELECT a FROM t1 WHERE a <> ANY ( SELECT a FROM t1 WHERE b = 2 );
a
1
3
SELECT a FROM t1 WHERE a > ALL ( SELECT a FROM t1 WHERE b = 2 );
a
3
SELECT a FROM t1 WHERE a < ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
SELECT a FROM t1 WHERE a = ALL ( SELECT a FROM t1 WHERE b = 2 );
a
2
SELECT a FROM t1 WHERE a >= ALL ( SELECT a FROM t1 WHERE b = 2 );
a
2
3
SELECT a FROM t1 WHERE a <= ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
2
SELECT a FROM t1 WHERE a <> ALL ( SELECT a FROM t1 WHERE b = 2 );
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = 2 UNION SELECT a FROM t1 WHERE b = 2);
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 HAVING a = 2 UNION SELECT a FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE (1,2) > ANY (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE a > ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) > ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) > ALL (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE a > ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) > ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) = ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) <> ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) = ANY (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 2 column(s)
SELECT a FROM t1 WHERE a = ANY (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) = ANY (SELECT a,2 FROM t1 WHERE b = 2);
a
SELECT a FROM t1 WHERE (1,2) <> ALL (SELECT a FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 2 column(s)
SELECT a FROM t1 WHERE a <> ALL (SELECT a,2 FROM t1 WHERE b = 2);
ERROR 21000: Operand should contain 1 column(s)
SELECT a FROM t1 WHERE (1,2) <> ALL (SELECT a,2 FROM t1 WHERE b = 2);
a
1
2
3
SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 WHERE b = 2);
a
2
SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 WHERE b = 2);
a
1
3
SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 WHERE b = 2 UNION SELECT a,1 FROM t1 WHERE b = 2);
a
2
SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 WHERE b = 2 UNION SELECT a,1 FROM t1 WHERE b = 2);
a
1
3
SELECT a FROM t1 WHERE (a,1) = ANY (SELECT a,1 FROM t1 HAVING a = 2 UNION SELECT a,1 FROM t1 HAVING a = 2);
a
2
SELECT a FROM t1 WHERE (a,1) <> ALL (SELECT a,1 FROM t1 HAVING a = 2 UNION SELECT a,1 FROM t1 HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = 2 group by a);
a
1
3
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 group by a HAVING a = 2);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 group by a HAVING a = 2);
a
1
3
SELECT concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a > t1.a), '-') from t1 a;
concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a > t1.a), '-')
0-
0-
1-
SELECT concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a < t1.a), '-') from t1 a;
concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a < t1.a), '-')
1-
0-
0-
SELECT concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a = t1.a), '-') from t1 a;
concat(EXISTS(SELECT a FROM t1 WHERE b = 2 and a.a = t1.a), '-')
0-
1-
0-
DROP TABLE t1;
CREATE TABLE t1 ( a double, b double );
INSERT INTO t1 VALUES (1,1),(2,2),(3,3);
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = 2e0);
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = 2e0);
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = 2e0);
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = 2e0);
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = 2e0);
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = 2e0);
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = 2e0);
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = 2e0);
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = 2e0);
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = 2e0);
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = 2e0);
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = 2e0);
a
1
3
DROP TABLE t1;
CREATE TABLE t1 ( a char(1), b char(1));
INSERT INTO t1 VALUES ('1','1'),('2','2'),('3','3');
SELECT a FROM t1 WHERE a > ANY (SELECT a FROM t1 WHERE b = '2');
a
3
SELECT a FROM t1 WHERE a < ANY (SELECT a FROM t1 WHERE b = '2');
a
1
SELECT a FROM t1 WHERE a = ANY (SELECT a FROM t1 WHERE b = '2');
a
2
SELECT a FROM t1 WHERE a >= ANY (SELECT a FROM t1 WHERE b = '2');
a
2
3
SELECT a FROM t1 WHERE a <= ANY (SELECT a FROM t1 WHERE b = '2');
a
1
2
SELECT a FROM t1 WHERE a <> ANY (SELECT a FROM t1 WHERE b = '2');
a
1
3
SELECT a FROM t1 WHERE a > ALL (SELECT a FROM t1 WHERE b = '2');
a
3
SELECT a FROM t1 WHERE a < ALL (SELECT a FROM t1 WHERE b = '2');
a
1
SELECT a FROM t1 WHERE a = ALL (SELECT a FROM t1 WHERE b = '2');
a
2
SELECT a FROM t1 WHERE a >= ALL (SELECT a FROM t1 WHERE b = '2');
a
2
3
SELECT a FROM t1 WHERE a <= ALL (SELECT a FROM t1 WHERE b = '2');
a
1
2
SELECT a FROM t1 WHERE a <> ALL (SELECT a FROM t1 WHERE b = '2');
a
1
3
DROP TABLE t1;
create table t1 (a int, b int);
insert into t1 values (1,2),(3,4);
select * from t1 up where exists (select * from t1 where t1.a=up.a);
a	b
1	2
3	4
explain extended select * from t1 up where exists (select * from t1 where t1.a=up.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	up	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.up.a' of SELECT #2 was resolved in SELECT #1
2432
Note	1003	select `test`.`up`.`a` AS `a`,`test`.`up`.`b` AS `b` from `test`.`t1` `up` where exists(select 1 from `test`.`t1` where (`test`.`t1`.`a` = `test`.`up`.`a`))
2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902
drop table t1;
CREATE TABLE t1 (t1_a int);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (t2_a int, t2_b int, PRIMARY KEY (t2_a, t2_b));
INSERT INTO t2 VALUES (1, 1), (1, 2);
SELECT * FROM t1, t2 table2 WHERE t1_a = 1 AND table2.t2_a = 1
HAVING table2.t2_b = (SELECT MAX(t2_b) FROM t2 WHERE t2_a = table2.t2_a);
t1_a	t2_a	t2_b
1	1	2
DROP TABLE t1, t2;
CREATE TABLE t1 (id int(11) default NULL,name varchar(10) default NULL);
INSERT INTO t1 VALUES (1,'Tim'),(2,'Rebecca'),(3,NULL);
CREATE TABLE t2 (id int(11) default NULL, pet varchar(10) default NULL);
INSERT INTO t2 VALUES (1,'Fido'),(2,'Spot'),(3,'Felix');
SELECT a.*, b.* FROM (SELECT * FROM t1) AS a JOIN t2 as b on a.id=b.id;
id	name	id	pet
1	Tim	1	Fido
2	Rebecca	2	Spot
3	NULL	3	Felix
drop table t1,t2;
CREATE TABLE t1 ( a int, b int );
CREATE TABLE t2 ( c int, d int );
INSERT INTO t1 VALUES (1,2), (2,3), (3,4);
SELECT a AS abc, b FROM t1 outr WHERE b =
(SELECT MIN(b) FROM t1 WHERE a=outr.a);
abc	b
1	2
2	3
3	4
INSERT INTO t2 SELECT a AS abc, b FROM t1 outr WHERE b =
(SELECT MIN(b) FROM t1 WHERE a=outr.a);
select * from t2;
c	d
1	2
2	3
3	4
CREATE TABLE t3 SELECT a AS abc, b FROM t1 outr WHERE b =
(SELECT MIN(b) FROM t1 WHERE a=outr.a);
select * from t3;
abc	b
1	2
2	3
3	4
prepare stmt1 from "INSERT INTO t2 SELECT a AS abc, b FROM t1 outr WHERE b = (SELECT MIN(b) FROM t1 WHERE a=outr.a);";
execute stmt1;
deallocate prepare stmt1;
select * from t2;
c	d
1	2
2	3
3	4
1	2
2	3
3	4
drop table t3;
prepare stmt1 from "CREATE TABLE t3 SELECT a AS abc, b FROM t1 outr WHERE b = (SELECT MIN(b) FROM t1 WHERE a=outr.a);";
execute stmt1;
select * from t3;
abc	b
1	2
2	3
3	4
deallocate prepare stmt1;
DROP TABLE t1, t2, t3;
CREATE TABLE `t1` ( `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t1 values (1);
CREATE TABLE `t2` ( `b` int(11) default NULL, `a` int(11) default NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1;
insert into t2 values (1,2);
select t000.a, count(*) `C` FROM t1 t000 GROUP BY t000.a HAVING count(*) > ALL (SELECT count(*) FROM t2 t001 WHERE t001.a=1);
a	C
1	1
drop table t1,t2;
create table t1 (a int not null auto_increment primary key, b varchar(40), fulltext(b));
insert into t1 (b) values ('ball'),('ball games'), ('games'), ('foo'), ('foobar'), ('Serg'), ('Sergei'),('Georg'), ('Patrik'),('Hakan');
create table t2 (a int);
insert into t2 values (1),(3),(2),(7);
select a,b from t1 where match(b) against ('Ball') > 0;
a	b
1	ball
2	ball games
select a from t2 where a in (select a from t1 where match(b) against ('Ball') > 0);
a
1
2
drop table t1,t2;
CREATE TABLE t1(`IZAVORGANG_ID` VARCHAR(11) CHARACTER SET latin1 COLLATE latin1_bin,`KUERZEL` VARCHAR(10) CHARACTER SET latin1 COLLATE latin1_bin,`IZAANALYSEART_ID` VARCHAR(11) CHARACTER SET latin1 COLLATE latin1_bin,`IZAPMKZ_ID` VARCHAR(11) CHARACTER SET latin1 COLLATE latin1_bin);
CREATE INDEX AK01IZAVORGANG ON t1(izaAnalyseart_id,Kuerzel);
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000001','601','D0000000001','I0000000001');
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000002','602','D0000000001','I0000000001');
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000003','603','D0000000001','I0000000001');
INSERT INTO t1(`IZAVORGANG_ID`,`KUERZEL`,`IZAANALYSEART_ID`,`IZAPMKZ_ID`)VALUES('D0000000004','101','D0000000001','I0000000001');
SELECT `IZAVORGANG_ID` FROM t1 WHERE `KUERZEL` IN(SELECT MIN(`KUERZEL`)`Feld1` FROM t1 WHERE `KUERZEL` LIKE'601%'And`IZAANALYSEART_ID`='D0000000001');
IZAVORGANG_ID
D0000000001
drop table t1;
CREATE TABLE `t1` ( `aid` int(11) NOT NULL default '0', `bid` int(11) NOT NULL default '0', PRIMARY KEY  (`aid`,`bid`));
CREATE TABLE `t2` ( `aid` int(11) NOT NULL default '0', `bid` int(11) NOT NULL default '0', PRIMARY KEY  (`aid`,`bid`));
insert into t1 values (1,1),(1,2),(2,1),(2,2);
insert into t2 values (1,2),(2,2);
select * from t1 where t1.aid not in (select aid from t2 where bid=t1.bid);
aid	bid
1	1
2	1
alter table t2 drop primary key;
alter table t2 add key KEY1 (aid, bid);
select * from t1 where t1.aid not in (select aid from t2 where bid=t1.bid);
aid	bid
1	1
2	1
alter table t2 drop key KEY1;
alter table t2 add primary key (bid, aid);
select * from t1 where t1.aid not in (select aid from t2 where bid=t1.bid);
aid	bid
1	1
2	1
drop table t1,t2;
CREATE TABLE t1 (howmanyvalues bigint, avalue int);
INSERT INTO t1 VALUES (1, 1),(2, 1),(2, 2),(3, 1),(3, 2),(3, 3),(4, 1),(4, 2),(4, 3),(4, 4);
SELECT howmanyvalues, count(*) from t1 group by howmanyvalues;
howmanyvalues	count(*)
1	1
2	2
3	3
4	4
SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues = a.howmanyvalues) as mycount from t1 a group by a.howmanyvalues;
howmanyvalues	mycount
1	1
2	2
3	3
4	4
CREATE INDEX t1_howmanyvalues_idx ON t1 (howmanyvalues);
SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues+1 = a.howmanyvalues+1) as mycount from t1 a group by a.howmanyvalues;
howmanyvalues	mycount
1	1
2	2
3	3
4	4
SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues = a.howmanyvalues) as mycount from t1 a group by a.howmanyvalues;
howmanyvalues	mycount
1	1
2	2
3	3
4	4
SELECT a.howmanyvalues, (SELECT count(*) from t1 b where b.howmanyvalues = a.avalue) as mycount from t1 a group by a.howmanyvalues;
howmanyvalues	mycount
1	1
2	1
3	1
4	1
drop table t1;
create table t1 (x int);
select  (select b.x from t1 as b where b.x=a.x) from t1 as a where a.x=2 group by a.x;
(select b.x from t1 as b where b.x=a.x)
drop table t1;
CREATE TABLE `t1` ( `master` int(10) unsigned NOT NULL default '0', `map` smallint(6) unsigned NOT NULL default '0', `slave` int(10) unsigned NOT NULL default '0', `access` int(10) unsigned NOT NULL default '0', UNIQUE KEY `access_u` (`master`,`map`,`slave`));
INSERT INTO `t1` VALUES (1,0,0,700),(1,1,1,400),(1,5,5,400),(1,12,12,400),(1,12,32,400),(4,12,32,400);
CREATE TABLE `t2` ( `id` int(10) unsigned NOT NULL default '0', `pid` int(10) unsigned NOT NULL default '0', `map` smallint(6) unsigned NOT NULL default '0', `level` tinyint(4) unsigned NOT NULL default '0', `title` varchar(255) default NULL, PRIMARY KEY  (`id`,`pid`,`map`), KEY `level` (`level`), KEY `id` (`id`,`map`)) ;
INSERT INTO `t2` VALUES (6,5,12,7,'a'),(12,0,0,7,'a'),(12,1,0,7,'a'),(12,5,5,7,'a'),(12,5,12,7,'a');
SELECT b.sc FROM (SELECT (SELECT a.access FROM t1 a WHERE a.map = op.map AND a.slave = op.pid AND a.master = 1) ac FROM t2 op WHERE op.id = 12 AND op.map = 0) b;
ERROR 42S22: Unknown column 'b.sc' in 'field list'
SELECT b.ac FROM (SELECT (SELECT a.access FROM t1 a WHERE a.map = op.map AND a.slave = op.pid AND a.master = 1) ac FROM t2 op WHERE op.id = 12 AND op.map = 0) b;
ac
700
NULL
drop tables t1,t2;
create table t1 (a int not null, b int not null, c int, primary key (a,b));
insert into t1 values (1,1,1), (2,2,2), (3,3,3);
set @b:= 0;
explain select sum(a) from t1 where b > @b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	8	NULL	3	Using where; Using index
set @a:= (select sum(a) from t1 where b > @b);
explain select a from t1 where c=2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
do @a:= (select sum(a) from t1 where b > @b);
explain select a from t1 where c=2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using where
drop table t1;
set @got_val= (SELECT 1 FROM (SELECT 'A' as my_col) as T1 ) ;
create table t1 (a int, b int);
create table t2 (a int, b int);
insert into t1 values (1,1),(1,2),(1,3),(2,4),(2,5);
insert into t2 values (1,3),(2,1);
select distinct a,b, (select max(b) from t2 where t1.b=t2.a) from t1 order by t1.b;
a	b	(select max(b) from t2 where t1.b=t2.a)
1	1	3
1	2	1
1	3	NULL
2	4	NULL
2	5	NULL
drop table t1, t2;
create table t1 (id int);
create table t2 (id int, body text, fulltext (body));
insert into t1 values(1),(2),(3);
insert into t2 values (1,'test'), (2,'mysql'), (3,'test'), (4,'test');
select count(distinct id) from t1 where id in (select id from t2 where match(body) against ('mysql' in boolean mode));
count(distinct id)
1
drop table t2,t1;
create table t1 (s1 int,s2 int);
insert into t1 values (20,15);
select * from t1 where  (('a',null) <=> (select 'a',s2 from t1 where s1 = 0));
s1	s2
drop table t1;
create table t1 (s1 int);
insert into t1 values (1),(null);
select * from t1 where s1 < all (select s1 from t1);
s1
select s1, s1 < all (select s1 from t1) from t1;
s1	s1 < all (select s1 from t1)
1	0
NULL	NULL
drop table t1;
CREATE TABLE t1 (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL default 'Asia',
Region char(26) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
IndepYear smallint(6) default NULL,
Population int(11) NOT NULL default '0',
LifeExpectancy float(3,1) default NULL,
GNP float(10,2) default NULL,
GNPOld float(10,2) default NULL,
LocalName char(45) NOT NULL default '',
GovernmentForm char(45) NOT NULL default '',
HeadOfState char(60) default NULL,
Capital int(11) default NULL,
Code2 char(2) NOT NULL default ''
) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('XXX','Xxxxx','Oceania','Xxxxxx',26.00,0,0,0,0,0,'Xxxxx','Xxxxx','Xxxxx',NULL,'XX');
INSERT INTO t1 VALUES ('ASM','American Samoa','Oceania','Polynesia',199.00,0,68000,75.1,334.00,NULL,'Amerika Samoa','US Territory','George W. Bush',54,'AS');
INSERT INTO t1 VALUES ('ATF','French Southern territories','Antarctica','Antarctica',7780.00,0,0,NULL,0.00,NULL,'Terres australes françaises','Nonmetropolitan Territory of France','Jacques Chirac',NULL,'TF');
INSERT INTO t1 VALUES ('UMI','United States Minor Outlying Islands','Oceania','Micronesia/Caribbean',16.00,0,0,NULL,0.00,NULL,'United States Minor Outlying Islands','Dependent Territory of the US','George W. Bush',NULL,'UM');
/*!40000 ALTER TABLE t1 ENABLE KEYS */;
SELECT DISTINCT Continent AS c FROM t1 outr WHERE
Code <> SOME ( SELECT Code FROM t1 WHERE Continent = outr.Continent AND
Population < 200);
c
Oceania
drop table t1;
create table t1 (a1 int);
create table t2 (b1 int);
select * from t1 where a2 > any(select b1 from t2);
ERROR 42S22: Unknown column 'a2' in 'IN/ALL/ANY subquery'
select * from t1 where a1 > any(select b1 from t2);
a1
drop table t1,t2;
create table t1 (a integer, b integer);
select (select * from t1) = (select 1,2);
(select * from t1) = (select 1,2)
NULL
select (select 1,2) = (select * from t1);
(select 1,2) = (select * from t1)
NULL
select  row(1,2) = ANY (select * from t1);
row(1,2) = ANY (select * from t1)
0
select  row(1,2) != ALL (select * from t1);
row(1,2) != ALL (select * from t1)
1
drop table t1;
create table t1 (a integer, b integer);
select row(1,(2,2)) in (select * from t1 );
ERROR 21000: Operand should contain 2 column(s)
select row(1,(2,2)) = (select * from t1 );
ERROR 21000: Operand should contain 2 column(s)
select (select * from t1) = row(1,(2,2));
ERROR 21000: Operand should contain 1 column(s)
drop table t1;
create  table t1 (a integer);
insert into t1 values (1);
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx ;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
select 1 as xx, 1 = ALL (  select 1 from t1 where 1 = xx );
xx	1 = ALL (  select 1 from t1 where 1 = xx )
1	1
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
select 1 = ALL (select 1 from t1 where 1 = xx ), 1 as xx from DUAL;
ERROR 42S22: Reference 'xx' not supported (forward reference in item list)
drop table t1;
CREATE TABLE t1 (
categoryId int(11) NOT NULL,
courseId int(11) NOT NULL,
startDate datetime NOT NULL,
endDate datetime NOT NULL,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL,
attributes text NOT NULL
);
INSERT INTO t1 VALUES (1,41,'2004-02-09','2010-01-01','2004-02-09','2004-02-09',''),
(1,86,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(1,87,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(2,52,'2004-03-15','2004-10-01','2004-03-15','2004-09-17',''),
(2,53,'2004-03-16','2004-10-01','2004-03-16','2004-09-17',''),
(2,88,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(2,89,'2004-08-16','2004-08-16','2004-08-16','2004-08-16',''),
(3,51,'2004-02-09','2010-01-01','2004-02-09','2004-02-09',''),
(5,12,'2004-02-18','2010-01-01','2004-02-18','2004-02-18','');
CREATE TABLE t2 (
userId int(11) NOT NULL,
courseId int(11) NOT NULL,
date datetime NOT NULL
);
INSERT INTO t2 VALUES (5141,71,'2003-11-18'),
(5141,72,'2003-11-25'),(5141,41,'2004-08-06'),
(5141,52,'2004-08-06'),(5141,53,'2004-08-06'),
(5141,12,'2004-08-06'),(5141,86,'2004-10-21'),
(5141,87,'2004-10-21'),(5141,88,'2004-10-21'),
(5141,89,'2004-10-22'),(5141,51,'2004-10-26');
CREATE TABLE t3 (
groupId int(11) NOT NULL,
parentId int(11) NOT NULL,
startDate datetime NOT NULL,
endDate datetime NOT NULL,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL,
ordering int(11)
);
INSERT INTO t3 VALUES (12,9,'1000-01-01','3999-12-31','2004-01-29','2004-01-29',NULL);
CREATE TABLE t4 (
id int(11) NOT NULL,
groupTypeId int(11) NOT NULL,
groupKey varchar(50) NOT NULL,
name text,
ordering int(11),
description text,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL
);
INSERT INTO t4 VALUES (9,5,'stationer','stationer',0,'Stationer','2004-01-29','2004-01-29'),
(12,5,'group2','group2',0,'group2','2004-01-29','2004-01-29');
CREATE TABLE t5 (
userId int(11) NOT NULL,
groupId int(11) NOT NULL,
createDate datetime NOT NULL,
modifyDate timestamp NOT NULL
);
INSERT INTO t5 VALUES (5141,12,'2004-08-06','2004-08-06');
select
count(distinct t2.userid) pass,
groupstuff.*,
count(t2.courseid) crse,
t1.categoryid,
t2.courseid,
date_format(date, '%b%y') as colhead
from t2
join t1 on t2.courseid=t1.courseid
join
(
select
t5.userid,
parentid,
parentgroup,
childid,
groupname,
grouptypeid
from t5
join
(
select t4.id as parentid,
t4.name as parentgroup,
t4.id as childid,
t4.name as groupname,
t4.grouptypeid
from t4
) as gin on t5.groupid=gin.childid
) as groupstuff on t2.userid = groupstuff.userid
group by
groupstuff.groupname, colhead , t2.courseid;
pass	userid	parentid	parentgroup	childid	groupname	grouptypeid	crse	categoryid	courseid	colhead
1	5141	12	group2	12	group2	5	1	5	12	Aug04
1	5141	12	group2	12	group2	5	1	1	41	Aug04
1	5141	12	group2	12	group2	5	1	2	52	Aug04
1	5141	12	group2	12	group2	5	1	2	53	Aug04
1	5141	12	group2	12	group2	5	1	3	51	Oct04
1	5141	12	group2	12	group2	5	1	1	86	Oct04
1	5141	12	group2	12	group2	5	1	1	87	Oct04
1	5141	12	group2	12	group2	5	1	2	88	Oct04
1	5141	12	group2	12	group2	5	1	2	89	Oct04
drop table t1, t2, t3, t4, t5;
create table t1 (a int);
insert into t1 values (1), (2), (3);
SELECT 1 FROM t1 WHERE (SELECT 1) in (SELECT 1);
1
1
1
1
drop table t1;
create table t1 (a int);
create table t2 (a int);
insert into t1 values (1),(2);
insert into t2 values (0),(1),(2),(3);
select a from t2 where a in (select a from t1);
a
1
2
select a from t2 having a in (select a from t1);
a
1
2
prepare stmt1 from "select a from t2 where a in (select a from t1)";
execute stmt1;
a
1
2
execute stmt1;
a
1
2
deallocate prepare stmt1;
prepare stmt1 from "select a from t2 having a in (select a from t1)";
execute stmt1;
a
1
2
execute stmt1;
a
1
2
deallocate prepare stmt1;
drop table t1, t2;
create table t1 (a int, b int);
insert into t1 values (1,2);
select 1 = (select * from t1);
ERROR 21000: Operand should contain 1 column(s)
select (select * from t1) = 1;
ERROR 21000: Operand should contain 2 column(s)
select (1,2) = (select a from t1);
ERROR 21000: Operand should contain 2 column(s)
select (select a from t1) = (1,2);
ERROR 21000: Operand should contain 1 column(s)
select (1,2,3) = (select * from t1);
ERROR 21000: Operand should contain 3 column(s)
select (select * from t1) = (1,2,3);
ERROR 21000: Operand should contain 2 column(s)
drop table t1;
CREATE TABLE `t1` (
`itemid` bigint(20) unsigned NOT NULL auto_increment,
`sessionid` bigint(20) unsigned default NULL,
`time` int(10) unsigned NOT NULL default '0',
`type` set('A','D','E','F','G','I','L','N','U') collate latin1_general_ci NOT
NULL default '',
`data` text collate latin1_general_ci NOT NULL,
PRIMARY KEY  (`itemid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t1` VALUES (1, 1, 1, 'D', '');
CREATE TABLE `t2` (
`sessionid` bigint(20) unsigned NOT NULL auto_increment,
`pid` int(10) unsigned NOT NULL default '0',
`date` int(10) unsigned NOT NULL default '0',
`ip` varchar(15) collate latin1_general_ci NOT NULL default '',
PRIMARY KEY  (`sessionid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t2` VALUES (1, 1, 1, '10.10.10.1');
SELECT s.ip, count( e.itemid ) FROM `t1` e JOIN t2 s ON s.sessionid = e.sessionid WHERE e.sessionid = ( SELECT sessionid FROM t2 ORDER BY sessionid DESC LIMIT 1 ) GROUP BY s.ip HAVING count( e.itemid ) >0 LIMIT 0 , 30;
ip	count( e.itemid )
10.10.10.1	1
drop tables t1,t2;
create table t1 (fld enum('0','1'));
insert into t1 values ('1');
select * from (select max(fld) from t1) as foo;
max(fld)
1
drop table t1;
Igor Babaev's avatar
Igor Babaev committed
2903 2904
set @tmp11867_optimizer_switch=@@optimizer_switch;
set optimizer_switch='semijoin_with_cache=off';
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CREATE TABLE t1 (one int, two int, flag char(1));
CREATE TABLE t2 (one int, two int, flag char(1));
INSERT INTO t1 VALUES(1,2,'Y'),(2,3,'Y'),(3,4,'Y'),(5,6,'N'),(7,8,'N');
INSERT INTO t2 VALUES(1,2,'Y'),(2,3,'Y'),(3,4,'Y'),(5,6,'N'),(7,8,'N');
SELECT * FROM t1
WHERE ROW(one,two) IN (SELECT DISTINCT one,two FROM t2 WHERE flag = 'N');
one	two	flag
5	6	N
7	8	N
SELECT * FROM t1
WHERE ROW(one,two) IN (SELECT DISTINCT one,two FROM t1 WHERE flag = 'N');
one	two	flag
5	6	N
7	8	N
insert into t2 values (null,null,'N');
insert into t2 values (null,3,'0');
insert into t2 values (null,5,'0');
insert into t2 values (10,null,'0');
insert into t1 values (10,3,'0');
insert into t1 values (10,5,'0');
insert into t1 values (10,10,'0');
SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N') as 'test' from t1;
one	two	test
1	2	NULL
2	3	NULL
3	4	NULL
5	6	1
7	8	1
10	3	NULL
10	5	NULL
10	10	NULL
SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N');
one	two
5	6
7	8
SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N' group by one,two) as 'test' from t1;
one	two	test
1	2	NULL
2	3	NULL
3	4	NULL
5	6	1
7	8	1
10	3	NULL
10	5	NULL
10	10	NULL
SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0') as 'test' from t1;
one	two	test
1	2	0
2	3	NULL
3	4	0
5	6	0
7	8	0
10	3	NULL
10	5	NULL
10	10	NULL
SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0' group by one,two) as 'test' from t1;
one	two	test
1	2	0
2	3	NULL
3	4	0
5	6	0
7	8	0
10	3	NULL
10	5	NULL
10	10	NULL
explain extended SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0') as 'test' from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	9	100.00	Using where
Warnings:
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Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where ((`test`.`t2`.`flag` = '0') and trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`)))) having (trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`))))) AS `test` from `test`.`t1`
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explain extended SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N');
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	
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1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	10	func,func	1	100.00	
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	9	100.00	Using where
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Warnings:
2982
Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`flag` = 'N'))
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explain extended SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0' group by one,two) as 'test' from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	9	100.00	Using where; Using temporary
Warnings:
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Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = '0') group by `test`.`t2`.`one`,`test`.`t2`.`two` having (trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`))) and trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`))))) AS `test` from `test`.`t1`
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DROP TABLE t1,t2;
Igor Babaev's avatar
Igor Babaev committed
2990
set optimizer_switch=@tmp11867_optimizer_switch;
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CREATE TABLE t1 (a char(5), b char(5));
INSERT INTO t1 VALUES (NULL,'aaa'), ('aaa','aaa');
SELECT * FROM t1 WHERE (a,b) IN (('aaa','aaa'), ('aaa','bbb'));
a	b
aaa	aaa
DROP TABLE t1;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int, b int);
CREATE TABLE t3 (b int NOT NULL);
INSERT INTO t1 VALUES (1), (2), (3), (4);
INSERT INTO t2 VALUES (1,10), (3,30);
SELECT * FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t3.b IS NOT NULL OR t2.a > 10;
a	b	b
SELECT * FROM t1
WHERE t1.a NOT IN (SELECT a FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t3.b IS NOT NULL OR t2.a > 10);
a
1
2
3
4
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (f1 INT);
CREATE TABLE t2 (f2 INT);
INSERT INTO t1 VALUES (1);
SELECT * FROM t1 WHERE f1 > ALL (SELECT f2 FROM t2);
f1
1
SELECT * FROM t1 WHERE f1 > ALL (SELECT f2 FROM t2 WHERE 1=0);
f1
1
INSERT INTO t2 VALUES (1);
INSERT INTO t2 VALUES (2);
SELECT * FROM t1 WHERE f1 > ALL (SELECT f2 FROM t2 WHERE f2=0);
f1
1
DROP TABLE t1, t2;
select 1 from dual where 1 < any (select 2);
1
1
select 1 from dual where 1 < all (select 2);
1
1
select 1 from dual where 2 > any (select 1);
1
1
select 1 from dual where 2 > all (select 1);
1
1
select 1 from dual where 1 < any (select 2 from dual);
1
1
select 1 from dual where 1 < all (select 2 from dual where 1!=1);
1
1
create table t1 (s1 char);
insert into t1 values (1),(2);
select * from t1 where (s1 < any (select s1 from t1));
s1
1
select * from t1 where not (s1 < any (select s1 from t1));
s1
2
select * from t1 where (s1 < ALL (select s1+1 from t1));
s1
1
select * from t1 where not(s1 < ALL (select s1+1 from t1));
s1
2
select * from t1 where (s1+1 = ANY (select s1 from t1));
s1
1
select * from t1 where NOT(s1+1 = ANY (select s1 from t1));
s1
2
select * from t1 where (s1 = ALL (select s1/s1 from t1));
s1
1
select * from t1 where NOT(s1 = ALL (select s1/s1 from t1));
s1
2
drop table t1;
create table t1 (
retailerID varchar(8) NOT NULL,
statusID   int(10) unsigned NOT NULL,
changed    datetime NOT NULL,
UNIQUE KEY retailerID (retailerID, statusID, changed)
);
INSERT INTO t1 VALUES("0026", "1", "2005-12-06 12:18:56");
INSERT INTO t1 VALUES("0026", "2", "2006-01-06 12:25:53");
INSERT INTO t1 VALUES("0037", "1", "2005-12-06 12:18:56");
INSERT INTO t1 VALUES("0037", "2", "2006-01-06 12:25:53");
INSERT INTO t1 VALUES("0048", "1", "2006-01-06 12:37:50");
INSERT INTO t1 VALUES("0059", "1", "2006-01-06 12:37:50");
select * from t1 r1
where (r1.retailerID,(r1.changed)) in
(SELECT r2.retailerId,(max(changed)) from t1 r2
group by r2.retailerId);
retailerID	statusID	changed
0026	2	2006-01-06 12:25:53
0037	2	2006-01-06 12:25:53
0048	1	2006-01-06 12:37:50
0059	1	2006-01-06 12:37:50
drop table t1;
create table t1(a int, primary key (a));
insert into t1 values (10);
create table t2 (a int primary key, b varchar(32), c int, unique key b(c, b));
insert into t2(a, c, b) values (1,10,'359'), (2,10,'35988'), (3,10,'35989');
explain SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
             ORDER BY t2.c DESC, t2.b DESC LIMIT 1) WHERE t1.a = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	PRIMARY	NULL	NULL	NULL	1	
unknown's avatar
unknown committed
3105
1	PRIMARY	r	eq_ref	PRIMARY	PRIMARY	4	const	1	Using where
3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116
2	DEPENDENT SUBQUERY	t2	range	b	b	40	NULL	2	Using index condition
SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
            ORDER BY t2.c DESC, t2.b DESC LIMIT 1) WHERE t1.a = 10;
a	a	b
10	3	35989
explain SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
            ORDER BY t2.c, t2.b LIMIT 1) WHERE t1.a = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	PRIMARY	NULL	NULL	NULL	1	
unknown's avatar
unknown committed
3117
1	PRIMARY	r	eq_ref	PRIMARY	PRIMARY	4	const	1	Using where
3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568
2	DEPENDENT SUBQUERY	t2	range	b	b	40	NULL	2	Using index condition
SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r
ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899'
            ORDER BY t2.c, t2.b LIMIT 1) WHERE t1.a = 10;
a	a	b
10	1	359
drop table t1,t2;
CREATE TABLE t1 (
field1 int NOT NULL,
field2 int NOT NULL,
field3 int NOT NULL,
PRIMARY KEY  (field1,field2,field3)
);
CREATE TABLE t2 (
fieldA int NOT NULL,
fieldB int NOT NULL,
PRIMARY KEY  (fieldA,fieldB)
);
INSERT INTO t1 VALUES
(1,1,1), (1,1,2), (1,2,1), (1,2,2), (1,2,3), (1,3,1);
INSERT INTO t2 VALUES (1,1), (1,2), (1,3);
SELECT field1, field2, COUNT(*)
FROM t1 GROUP BY field1, field2;
field1	field2	COUNT(*)
1	1	2
1	2	3
1	3	1
SELECT field1, field2
FROM  t1
GROUP BY field1, field2
HAVING COUNT(*) >= ALL (SELECT fieldB
FROM t2 WHERE fieldA = field1);
field1	field2
1	2
SELECT field1, field2
FROM  t1
GROUP BY field1, field2
HAVING COUNT(*) < ANY (SELECT fieldB
FROM t2 WHERE fieldA = field1);
field1	field2
1	1
1	3
DROP TABLE t1, t2;
CREATE TABLE t1(a int, INDEX (a));
INSERT INTO t1 VALUES (1), (3), (5), (7);
INSERT INTO t1 VALUES (NULL);
CREATE TABLE t2(a int);
INSERT INTO t2 VALUES (1),(2),(3);
EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	2	Using index; Full scan on NULL key
SELECT a, a IN (SELECT a FROM t1) FROM t2;
a	a IN (SELECT a FROM t1)
1	1
2	NULL
3	1
DROP TABLE t1,t2;
CREATE TABLE t1 (a DATETIME);
INSERT INTO t1 VALUES ('1998-09-23'), ('2003-03-25');
CREATE TABLE t2 AS SELECT
(SELECT a FROM t1 WHERE a < '2000-01-01') AS sub_a
FROM t1 WHERE a > '2000-01-01';
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `sub_a` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
CREATE TABLE t3 AS (SELECT a FROM t1 WHERE a < '2000-01-01') UNION (SELECT a FROM t1 WHERE a > '2000-01-01');
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) > 0;
a
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
a
1
2
EXPLAIN SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
DROP TABLE t1;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (2), (4), (1), (3);
CREATE TABLE t2 (b int, c int);
INSERT INTO t2 VALUES
(2,1), (1,3), (2,1), (4,4), (2,2), (1,4);
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 2 );
a
2
4
1
3
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 1);
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 2), a;
a
1
2
3
4
SELECT a FROM t1 ORDER BY (SELECT c FROM t2 WHERE b > 1), a;
ERROR 21000: Subquery returns more than 1 row
SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 2);
b	MAX(c)
1	4
2	2
4	4
SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 1);
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 2),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3;
a
1
2
3
4
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 1),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3;
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3;
a
4
SELECT a FROM t1 GROUP BY a
HAVING IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)) > 3;
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1
ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b));
a
1
2
3
4
SELECT a FROM t1
ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1),
(SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b));
ERROR 21000: Subquery returns more than 1 row
SELECT a FROM t1
ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b));
a
1
2
3
4
SELECT a FROM t1
ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b));
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1,t2;
create table t1 (df decimal(5,1));
insert into t1 values(1.1);
insert into t1 values(2.2);
select * from t1 where df <= all (select avg(df) from t1 group by df);
df
1.1
select * from t1 where df >= all (select avg(df) from t1 group by df);
df
2.2
drop table t1;
create table t1 (df decimal(5,1));
insert into t1 values(1.1);
select 1.1 * exists(select * from t1);
1.1 * exists(select * from t1)
1.1
drop table t1;
CREATE TABLE t1 (
grp int(11) default NULL,
a decimal(10,2) default NULL);
insert into t1 values (1, 1), (2, 2), (2, 3), (3, 4), (3, 5), (3, 6), (NULL, NULL);
select * from t1;
grp	a
1	1.00
2	2.00
2	3.00
3	4.00
3	5.00
3	6.00
NULL	NULL
select min(a) from t1 group by grp;
min(a)
NULL
1.00
2.00
4.00
drop table t1;
CREATE table t1 ( c1 integer );
INSERT INTO t1 VALUES ( 1 );
INSERT INTO t1 VALUES ( 2 );
INSERT INTO t1 VALUES ( 3 );
CREATE TABLE t2 ( c2 integer );
INSERT INTO t2 VALUES ( 1 );
INSERT INTO t2 VALUES ( 4 );
INSERT INTO t2 VALUES ( 5 );
SELECT * FROM t1 LEFT JOIN t2 ON c1 = c2 WHERE c2 IN (1);
c1	c2
1	1
SELECT * FROM t1 LEFT JOIN t2 ON c1 = c2
WHERE c2 IN ( SELECT c2 FROM t2 WHERE c2 IN ( 1 ) );
c1	c2
1	1
DROP TABLE t1,t2;
CREATE TABLE t1 ( c1 integer );
INSERT INTO t1 VALUES ( 1 );
INSERT INTO t1 VALUES ( 2 );
INSERT INTO t1 VALUES ( 3 );
INSERT INTO t1 VALUES ( 6 );
CREATE TABLE t2 ( c2 integer );
INSERT INTO t2 VALUES ( 1 );
INSERT INTO t2 VALUES ( 4 );
INSERT INTO t2 VALUES ( 5 );
INSERT INTO t2 VALUES ( 6 );
CREATE TABLE t3 ( c3 integer );
INSERT INTO t3 VALUES ( 7 );
INSERT INTO t3 VALUES ( 8 );
SELECT c1,c2 FROM t1 LEFT JOIN t2 ON c1 = c2
WHERE EXISTS (SELECT c3 FROM t3 WHERE c2 IS NULL );
c1	c2
2	NULL
3	NULL
DROP TABLE t1,t2,t3;
CREATE TABLE `t1` (
`itemid` bigint(20) unsigned NOT NULL auto_increment,
`sessionid` bigint(20) unsigned default NULL,
`time` int(10) unsigned NOT NULL default '0',
`type` set('A','D','E','F','G','I','L','N','U') collate latin1_general_ci NOT
NULL default '',
`data` text collate latin1_general_ci NOT NULL,
PRIMARY KEY  (`itemid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t1` VALUES (1, 1, 1, 'D', '');
CREATE TABLE `t2` (
`sessionid` bigint(20) unsigned NOT NULL auto_increment,
`pid` int(10) unsigned NOT NULL default '0',
`date` int(10) unsigned NOT NULL default '0',
`ip` varchar(15) collate latin1_general_ci NOT NULL default '',
PRIMARY KEY  (`sessionid`)
) DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO `t2` VALUES (1, 1, 1, '10.10.10.1');
SELECT s.ip, count( e.itemid ) FROM `t1` e JOIN t2 s ON s.sessionid = e.sessionid WHERE e.sessionid = ( SELECT sessionid FROM t2 ORDER BY sessionid DESC LIMIT 1 ) GROUP BY s.ip HAVING count( e.itemid ) >0 LIMIT 0 , 30;
ip	count( e.itemid )
10.10.10.1	1
drop tables t1,t2;
CREATE TABLE t1 (EMPNUM   CHAR(3));
CREATE TABLE t2 (EMPNUM   CHAR(3) );
INSERT INTO t1 VALUES ('E1'),('E2');
INSERT INTO t2 VALUES ('E1');
DELETE FROM t1
WHERE t1.EMPNUM NOT IN
(SELECT t2.EMPNUM
FROM t2
WHERE t1.EMPNUM = t2.EMPNUM);
select * from t1;
EMPNUM
E1
DROP TABLE t1,t2;
CREATE TABLE t1(select_id BIGINT, values_id BIGINT);
INSERT INTO t1 VALUES (1, 1);
CREATE TABLE t2 (select_id BIGINT, values_id BIGINT,
PRIMARY KEY(select_id,values_id));
INSERT INTO t2 VALUES (0, 1), (0, 2), (0, 3), (1, 5);
SELECT values_id FROM t1
WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id IN (1, 0));
values_id
1
SELECT values_id FROM t1
WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id BETWEEN 0 AND 1);
values_id
1
SELECT values_id FROM t1
WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id = 0 OR select_id = 1);
values_id
1
DROP TABLE t1, t2;
create table t1 (fld enum('0','1'));
insert into t1 values ('1');
select * from (select max(fld) from t1) as foo;
max(fld)
1
drop table t1;
CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (c int, d int);
CREATE TABLE t3 (e int);
INSERT INTO t1 VALUES
(1,10), (2,10), (1,20), (2,20), (3,20), (2,30), (4,40);
INSERT INTO t2 VALUES
(2,10), (2,20), (4,10), (5,10), (3,20), (2,40);
INSERT INTO t3 VALUES (10), (30), (10), (20) ;
SELECT a, MAX(b), MIN(b) FROM t1 GROUP BY a;
a	MAX(b)	MIN(b)
1	20	10
2	30	10
3	20	20
4	40	40
SELECT * FROM t2;
c	d
2	10
2	20
4	10
5	10
3	20
2	40
SELECT * FROM t3;
e
10
30
10
20
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2 WHERE MAX(b)>20);
a
2
4
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2 WHERE MAX(b)<d);
a
2
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2 WHERE MAX(b)>d);
a
2
4
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE d >= SOME(SELECT e FROM t3 WHERE MAX(b)=e));
a
2
3
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE  EXISTS(SELECT e FROM t3 WHERE MAX(b)=e AND e <= d));
a
2
3
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE d > SOME(SELECT e FROM t3 WHERE MAX(b)=e));
a
2
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE  EXISTS(SELECT e FROM t3 WHERE MAX(b)=e AND e < d));
a
2
SELECT a FROM t1 GROUP BY a
HAVING a IN (SELECT c FROM t2
WHERE MIN(b) < d AND
EXISTS(SELECT e FROM t3 WHERE MAX(b)=e AND e <= d));
a
2
SELECT a, SUM(a) FROM t1 GROUP BY a;
a	SUM(a)
1	2
2	6
3	3
4	4
SELECT a FROM t1
WHERE EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) = c) GROUP BY a;
a
3
4
SELECT a FROM t1 GROUP BY a
HAVING EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) = c);
a
1
3
4
SELECT a FROM t1
WHERE a < 3 AND
EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) != c) GROUP BY a;
a
1
2
SELECT a FROM t1
WHERE a < 3 AND
EXISTS(SELECT c FROM t2 GROUP BY c HAVING SUM(a) != c);
a
1
2
1
2
2
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a < ALL(SELECT t2.c FROM t2 GROUP BY t2.c
HAVING EXISTS(SELECT t3.e FROM t3 GROUP BY t3.e
HAVING SUM(t1.a+t2.c) < t3.e/4));
a
1
2
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a > ALL(SELECT t2.c FROM t2
WHERE EXISTS(SELECT t3.e FROM t3 GROUP BY t3.e
HAVING SUM(t1.a+t2.c) < t3.e/4));
a
4
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a > ALL(SELECT t2.c FROM t2
WHERE EXISTS(SELECT t3.e FROM t3
WHERE SUM(t1.a+t2.c) < t3.e/4));
ERROR HY000: Invalid use of group function
SELECT t1.a from t1 GROUP BY t1.a HAVING AVG(SUM(t1.b)) > 20;
ERROR HY000: Invalid use of group function
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a IN (SELECT t2.c FROM t2 GROUP BY t2.c
HAVING AVG(t2.c+SUM(t1.b)) > 20);
a
2
3
4
SELECT t1.a FROM t1 GROUP BY t1.a
HAVING t1.a IN (SELECT t2.c FROM t2 GROUP BY t2.c
HAVING AVG(SUM(t1.b)) > 20);
a
2
4
SELECT t1.a, SUM(b) AS sum  FROM t1 GROUP BY t1.a
HAVING t1.a IN (SELECT t2.c FROM t2 GROUP BY t2.c
HAVING t2.c+sum > 20);
a	sum
2	60
3	20
4	40
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a varchar(5), b varchar(10));
INSERT INTO t1 VALUES
('AAA', 5), ('BBB', 4), ('BBB', 1), ('CCC', 2),
('CCC', 7), ('AAA', 2), ('AAA', 4), ('BBB', 3), ('AAA', 8);
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
a	b
BBB	4
CCC	7
AAA	8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	9	Using where
3569 3570
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	23	test.t1.a,test.t1.b	1	
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	9	Using temporary
3571 3572 3573 3574 3575 3576 3577 3578 3579
ALTER TABLE t1 ADD INDEX(a);
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
a	b
BBB	4
CCC	7
AAA	8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
3580 3581 3582
1	PRIMARY	t1	ALL	a	NULL	NULL	NULL	9	Using where
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	23	test.t1.a,test.t1.b	1	
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	9	Using temporary
3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471
DROP TABLE t1;
create table t1( f1 int,f2 int);
insert into t1 values (1,1),(2,2);
select tt.t from (select 'crash1' as t, f2 from t1) as tt left join t1 on tt.t = 'crash2' and tt.f2 = t1.f2 where tt.t = 'crash1';
t
crash1
crash1
drop table t1;
create table t1 (c int, key(c));
insert into t1 values (1142477582), (1142455969);
create table t2 (a int, b int);
insert into t2 values (2, 1), (1, 0);
delete from t1 where c <= 1140006215 and (select b from t2 where a = 2) = 1;
drop table t1, t2;
CREATE TABLE t1 (a INT);
CREATE VIEW v1 AS SELECT * FROM t1 WHERE no_such_column = ANY (SELECT 1);
ERROR 42S22: Unknown column 'no_such_column' in 'where clause'
CREATE VIEW v2 AS SELECT * FROM t1 WHERE no_such_column = (SELECT 1);
ERROR 42S22: Unknown column 'no_such_column' in 'where clause'
SELECT * FROM t1 WHERE no_such_column = ANY (SELECT 1);
ERROR 42S22: Unknown column 'no_such_column' in 'IN/ALL/ANY subquery'
DROP TABLE t1;
create table t1 (i int, j bigint);
insert into t1 values (1, 2), (2, 2), (3, 2);
select * from (select min(i) from t1 where j=(select * from (select min(j) from t1) t2)) t3;
min(i)
1
drop table t1;
CREATE TABLE t1 (i BIGINT UNSIGNED);
INSERT INTO t1 VALUES (10000000000000000000);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (i BIGINT UNSIGNED);
INSERT INTO t2 VALUES (10000000000000000000);
INSERT INTO t2 VALUES (1);
/* simple test */
SELECT t1.i FROM t1 JOIN t2 ON t1.i = t2.i;
i
10000000000000000000
1
/* subquery test */
SELECT t1.i FROM t1 WHERE t1.i = (SELECT MAX(i) FROM t2);
i
10000000000000000000
/* subquery test with cast*/
SELECT t1.i FROM t1 WHERE t1.i = CAST((SELECT MAX(i) FROM t2) AS UNSIGNED);
i
10000000000000000000
DROP TABLE t1;
DROP TABLE t2;
CREATE TABLE t1 (
id bigint(20) unsigned NOT NULL auto_increment,
name varchar(255) NOT NULL,
PRIMARY KEY  (id)
);
INSERT INTO t1 VALUES
(1, 'Balazs'), (2, 'Joe'), (3, 'Frank');
CREATE TABLE t2 (
id bigint(20) unsigned NOT NULL auto_increment,
mid bigint(20) unsigned NOT NULL,
date date NOT NULL,
PRIMARY KEY  (id)
);
INSERT INTO t2 VALUES
(1, 1, '2006-03-30'), (2, 2, '2006-04-06'), (3, 3, '2006-04-13'),
(4, 2, '2006-04-20'), (5, 1, '2006-05-01');
SELECT *,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 0, 1) AS date_last,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 3, 1) AS date_next_to_last
FROM t1;
id	name	date_last	date_next_to_last
1	Balazs	2006-05-01	NULL
2	Joe	2006-04-20	NULL
3	Frank	2006-04-13	NULL
SELECT *,
(SELECT COUNT(*) FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 1, 1) AS date_count
FROM t1;
id	name	date_count
1	Balazs	NULL
2	Joe	NULL
3	Frank	NULL
SELECT *,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 0, 1) AS date_last,
(SELECT date FROM t2 WHERE mid = t1.id
ORDER BY date DESC LIMIT 1, 1) AS date_next_to_last
FROM t1;
id	name	date_last	date_next_to_last
1	Balazs	2006-05-01	2006-03-30
2	Joe	2006-04-20	2006-04-06
3	Frank	2006-04-13	NULL
DROP TABLE t1,t2;
CREATE TABLE t1 (
i1 int(11) NOT NULL default '0',
i2 int(11) NOT NULL default '0',
t datetime NOT NULL default '0000-00-00 00:00:00',
PRIMARY KEY  (i1,i2,t)
);
INSERT INTO t1 VALUES
(24,1,'2005-03-03 16:31:31'),(24,1,'2005-05-27 12:40:07'),
(24,1,'2005-05-27 12:40:08'),(24,1,'2005-05-27 12:40:10'),
(24,1,'2005-05-27 12:40:25'),(24,1,'2005-05-27 12:40:30'),
(24,2,'2005-03-03 13:43:05'),(24,2,'2005-03-03 16:23:31'),
(24,2,'2005-03-03 16:31:30'),(24,2,'2005-05-27 12:37:02'),
(24,2,'2005-05-27 12:40:06');
CREATE TABLE t2 (
i1 int(11) NOT NULL default '0',
i2 int(11) NOT NULL default '0',
t datetime default NULL,
PRIMARY KEY  (i1)
);
INSERT INTO t2 VALUES (24,1,'2006-06-20 12:29:40');
EXPLAIN
SELECT * FROM t1,t2
WHERE t1.t = (SELECT t1.t FROM t1
WHERE t1.t < t2.t  AND t1.i2=1 AND t2.i1=t1.i1
ORDER BY t1.t DESC LIMIT 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t1	index	NULL	PRIMARY	16	NULL	11	Using where; Using index
2	DEPENDENT SUBQUERY	t1	range	PRIMARY	PRIMARY	16	NULL	5	Using where; Using index
SELECT * FROM t1,t2
WHERE t1.t = (SELECT t1.t FROM t1
WHERE t1.t < t2.t  AND t1.i2=1 AND t2.i1=t1.i1
ORDER BY t1.t DESC LIMIT 1);
i1	i2	t	i1	i2	t
24	1	2005-05-27 12:40:30	24	1	2006-06-20 12:29:40
DROP TABLE t1, t2;
CREATE TABLE t1 (a VARCHAR(250), b INT auto_increment, PRIMARY KEY (b));
insert into t1 (a) values (FLOOR(rand() * 100));
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
insert into t1 (a) select FLOOR(rand() * 100) from t1;
SELECT a,
(SELECT REPEAT(' ',250) FROM t1 i1
WHERE i1.b=t1.a ORDER BY RAND() LIMIT 1) AS a
FROM t1 ORDER BY a LIMIT 5;
a	a
0	NULL
0	NULL
0	NULL
0	NULL
0	NULL
DROP TABLE t1;
CREATE TABLE t1 (a INT, b INT);
CREATE TABLE t2 (a INT);
INSERT INTO t2 values (1);
INSERT INTO t1 VALUES (1,1),(1,2),(2,3),(3,4);
SELECT (SELECT COUNT(DISTINCT t1.b) from t2) FROM t1 GROUP BY t1.a;
(SELECT COUNT(DISTINCT t1.b) from t2)
2
1
1
SELECT (SELECT COUNT(DISTINCT t1.b) from t2 union select 1 from t2 where 12 < 3)
FROM t1 GROUP BY t1.a;
(SELECT COUNT(DISTINCT t1.b) from t2 union select 1 from t2 where 12 < 3)
2
1
1
SELECT COUNT(DISTINCT t1.b), (SELECT COUNT(DISTINCT t1.b)) FROM t1 GROUP BY t1.a;
COUNT(DISTINCT t1.b)	(SELECT COUNT(DISTINCT t1.b))
2	2
1	1
1	1
SELECT COUNT(DISTINCT t1.b),
(SELECT COUNT(DISTINCT t1.b) union select 1 from DUAL where 12 < 3)
FROM t1 GROUP BY t1.a;
COUNT(DISTINCT t1.b)	(SELECT COUNT(DISTINCT t1.b) union select 1 from DUAL where 12 < 3)
2	2
1	1
1	1
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
)
FROM t1 GROUP BY t1.a;
(
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
)
2
1
1
SELECT (
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
)
FROM t1 GROUP BY t1.a LIMIT 1)
FROM t1 t2
GROUP BY t2.a;
(
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
)
FROM t1 GROUP BY t1.a LIMIT 1)
2
2
2
DROP TABLE t1,t2;
CREATE TABLE t1 (a int, b int, PRIMARY KEY (b));
CREATE TABLE t2 (x int auto_increment, y int, z int,
PRIMARY KEY (x), FOREIGN KEY (y) REFERENCES t1 (b));
create table t3 (a int);
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
insert into t1 select RAND()*1000, A.a + 10*(B.a+10*(C.a+10*D.a))
from t3 A, t3 B, t3 C, t3 D where D.a<3;
insert into t2(y,z) select t1.b, RAND()*1000 from t1, t3;
SET SESSION sort_buffer_size = 32 * 1024;
SELECT SQL_NO_CACHE COUNT(*)
FROM (SELECT  a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
FROM t1) t;
COUNT(*)
3000
SET SESSION sort_buffer_size = 8 * 1024 * 1024;
SELECT SQL_NO_CACHE COUNT(*)
FROM (SELECT  a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
FROM t1) t;
COUNT(*)
3000
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id char(4) PRIMARY KEY, c int);
CREATE TABLE t2 (c int);
INSERT INTO t1 VALUES ('aa', 1);
INSERT INTO t2 VALUES (1);
SELECT * FROM t1
WHERE EXISTS (SELECT c FROM t2 WHERE c=1
UNION
SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
INSERT INTO t1 VALUES ('bb', 2), ('cc', 3), ('dd',1);
SELECT * FROM t1
WHERE EXISTS (SELECT c FROM t2 WHERE c=1
UNION
SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
bb	2
cc	3
dd	1
INSERT INTO t2 VALUES (2);
CREATE TABLE t3 (c int);
INSERT INTO t3 VALUES (1);
SELECT * FROM t1
WHERE EXISTS (SELECT t2.c FROM t2 JOIN t3 ON t2.c=t3.c WHERE t2.c=1
UNION
SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
bb	2
cc	3
dd	1
DROP TABLE t1,t2,t3;
CREATE TABLE t1(f1 int);
CREATE TABLE t2(f2 int, f21 int, f3 timestamp);
INSERT INTO t1 VALUES (1),(1),(2),(2);
INSERT INTO t2 VALUES (1,1,"2004-02-29 11:11:11"), (2,2,"2004-02-29 11:11:11");
SELECT ((SELECT f2 FROM t2 WHERE f21=f1 LIMIT 1) * COUNT(f1)) AS sq FROM t1 GROUP BY f1;
sq
2
4
SELECT (SELECT SUM(1) FROM t2 ttt GROUP BY t2.f3 LIMIT 1) AS tt FROM t2;
tt
2
2
PREPARE stmt1 FROM 'SELECT ((SELECT f2 FROM t2 WHERE f21=f1 LIMIT 1) * COUNT(f1)) AS sq FROM t1 GROUP BY f1';
EXECUTE stmt1;
sq
2
4
EXECUTE stmt1;
sq
2
4
DEALLOCATE PREPARE stmt1;
SELECT f2, AVG(f21),
(SELECT t.f3 FROM t2 AS t WHERE t2.f2=t.f2 AND t.f3=MAX(t2.f3)) AS test
FROM t2 GROUP BY f2;
f2	AVG(f21)	test
1	1.0000	2004-02-29 11:11:11
2	2.0000	2004-02-29 11:11:11
DROP TABLE t1,t2;
CREATE TABLE t1 (a int, b INT, c CHAR(10) NOT NULL);
INSERT INTO t1 VALUES
(1,1,'a'), (1,2,'b'), (1,3,'c'), (1,4,'d'), (1,5,'e'),
(2,1,'f'), (2,2,'g'), (2,3,'h'), (3,4,'i'), (3,3,'j'),
(3,2,'k'), (3,1,'l'), (1,9,'m');
SELECT a, MAX(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b)) AS test
FROM t1 GROUP BY a;
a	MAX(b)	test
1	9	m
2	3	h
3	4	i
DROP TABLE t1;
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
DROP TABLE IF EXISTS t1xt2;
CREATE TABLE t1 (
id_1 int(5) NOT NULL,
t varchar(4) DEFAULT NULL
);
CREATE TABLE t2 (
id_2 int(5) NOT NULL,
t varchar(4) DEFAULT NULL
);
CREATE TABLE t1xt2 (
id_1 int(5) NOT NULL,
id_2 int(5) NOT NULL
);
INSERT INTO t1 VALUES (1, 'a'), (2, 'b'), (3, 'c'), (4, 'd');
INSERT INTO t2 VALUES (2, 'bb'), (3, 'cc'), (4, 'dd'), (12, 'aa');
INSERT INTO t1xt2 VALUES (2, 2), (3, 3), (4, 4);
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN ((SELECT t1xt2.id_2 FROM t1xt2 where t1.id_1 = t1xt2.id_1)));
id_1
1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (((SELECT t1xt2.id_2 FROM t1xt2 where t1.id_1 = t1xt2.id_1))));
id_1
1
2
3
4
insert INTO t1xt2 VALUES (1, 12);
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
1
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
2
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
2
3
4
insert INTO t1xt2 VALUES (2, 12);
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
1
2
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
1
2
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
1
2
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));
id_1
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN ((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1)));
id_1
3
4
SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (((SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1))));
id_1
3
4
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t1xt2;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (3), (1), (2);
SELECT 'this is ' 'a test.' AS col1, a AS col2 FROM t1;
col1	col2
this is a test.	3
this is a test.	1
this is a test.	2
SELECT * FROM (SELECT 'this is ' 'a test.' AS col1, a AS t2 FROM t1) t;
col1	t2
this is a test.	3
this is a test.	1
this is a test.	2
DROP table t1;
CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (m int, n int);
INSERT INTO t1 VALUES (2,2), (2,2), (3,3), (3,3), (3,3), (4,4);
INSERT INTO t2 VALUES (1,11), (2,22), (3,32), (4,44), (4,44);
SELECT COUNT(*), a,
(SELECT m FROM t2 WHERE m = count(*) LIMIT 1)
FROM t1 GROUP BY a;
COUNT(*)	a	(SELECT m FROM t2 WHERE m = count(*) LIMIT 1)
2	2	2
3	3	3
1	4	1
SELECT COUNT(*), a,
(SELECT MIN(m) FROM t2 WHERE m = count(*))
FROM t1 GROUP BY a;
COUNT(*)	a	(SELECT MIN(m) FROM t2 WHERE m = count(*))
2	2	2
3	3	3
1	4	1
SELECT COUNT(*), a
FROM t1 GROUP BY a
HAVING (SELECT MIN(m) FROM t2 WHERE m = count(*)) > 1;
COUNT(*)	a
2	2
3	3
DROP TABLE t1,t2;
CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (m int, n int);
INSERT INTO t1 VALUES (2,2), (2,2), (3,3), (3,3), (3,3), (4,4);
INSERT INTO t2 VALUES (1,11), (2,22), (3,32), (4,44), (4,44);
SELECT COUNT(*) c, a,
(SELECT GROUP_CONCAT(COUNT(a)) FROM t2 WHERE m = a)
FROM t1 GROUP BY a;
c	a	(SELECT GROUP_CONCAT(COUNT(a)) FROM t2 WHERE m = a)
2	2	2
3	3	3
1	4	1,1
SELECT COUNT(*) c, a,
(SELECT GROUP_CONCAT(COUNT(a)+1) FROM t2 WHERE m = a)
FROM t1 GROUP BY a;
c	a	(SELECT GROUP_CONCAT(COUNT(a)+1) FROM t2 WHERE m = a)
2	2	3
3	3	4
1	4	2,2
DROP table t1,t2;
CREATE TABLE t1 (a int, b INT, d INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
INSERT INTO t1 VALUES (1,1,0,'a'), (1,2,0,'b'), (1,3,0,'c'), (1,4,0,'d'),
(1,5,0,'e'), (2,1,0,'f'), (2,2,0,'g'), (2,3,0,'h'), (3,4,0,'i'), (3,3,0,'j'),
(3,2,0,'k'), (3,1,0,'l'), (1,9,0,'m'), (1,0,10,'n'), (2,0,5,'o'), (3,0,7,'p');
SELECT a, MAX(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b + 0)) as test
FROM t1 GROUP BY a;
a	MAX(b)	test
1	9	m
2	3	h
3	4	i
SELECT a x, MAX(b),
(SELECT t.c FROM t1 AS t WHERE x=t.a AND t.b=MAX(t1.b + 0)) as test
FROM t1 GROUP BY a;
x	MAX(b)	test
1	9	m
2	3	h
3	4	i
SELECT a, AVG(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=AVG(t1.b)) AS test
FROM t1 WHERE t1.d=0 GROUP BY a;
a	AVG(b)	test
1	4.0000	d
2	2.0000	g
3	2.5000	NULL
SELECT tt.a,
(SELECT (SELECT c FROM t1 as t WHERE t1.a=t.a AND t.d=MAX(t1.b + tt.a)
LIMIT 1) FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1) as test
FROM t1 as tt;
a	test
1	n
1	n
1	n
1	n
1	n
1	n
1	n
2	o
2	o
2	o
2	o
3	p
3	p
3	p
3	p
3	p
SELECT tt.a,
(SELECT (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.d=MAX(t1.b + tt.a)
LIMIT 1)
FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1) as test
FROM t1 as tt GROUP BY tt.a;
a	test
1	n
2	o
3	p
SELECT tt.a, MAX(
(SELECT (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.d=MAX(t1.b + tt.a)
LIMIT 1)
FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1)) as test
FROM t1 as tt GROUP BY tt.a;
a	test
1	n
2	o
3	p
DROP TABLE t1;
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (2,22),(1,11),(2,22);
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
a
1
2
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
a
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
a
1
2
SET @@sql_mode='ansi';
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
ERROR HY000: Invalid use of group function
SET @@sql_mode=default;
DROP TABLE t1;
CREATE TABLE t1 (a INT);
INSERT INTO t1 values (1),(1),(1),(1);
CREATE TABLE t2 (x INT);
INSERT INTO t1 values (1000),(1001),(1002);
SELECT SUM( (SELECT COUNT(a) FROM t2) ) FROM t1;
ERROR HY000: Invalid use of group function
SELECT SUM( (SELECT SUM(COUNT(a)) FROM t2) ) FROM t1;
ERROR HY000: Invalid use of group function
SELECT COUNT(1) FROM DUAL;
COUNT(1)
1
SELECT SUM( (SELECT AVG( (SELECT t1.a FROM t2) ) FROM DUAL) ) FROM t1;
ERROR HY000: Invalid use of group function
SELECT
SUM( (SELECT AVG( (SELECT COUNT(*) FROM t1 t HAVING t1.a < 12) ) FROM t2) )
FROM t1;
ERROR HY000: Invalid use of group function
SELECT t1.a as XXA,
SUM( (SELECT AVG( (SELECT COUNT(*) FROM t1 t HAVING XXA < 12) ) FROM t2) )
FROM t1;
ERROR HY000: Invalid use of group function
DROP TABLE t1,t2;
CREATE TABLE t1 (a int, b int, KEY (a));
INSERT INTO t1 VALUES (1,1),(2,1);
EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT COUNT(*) FROM t1 GROUP BY b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ref	a	a	5	const	0	Using where; Using index
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary; Using filesort
DROP TABLE t1;
CREATE TABLE t1 (id int NOT NULL, st CHAR(2), INDEX idx(id));
INSERT INTO t1 VALUES
(3,'FL'), (2,'GA'), (4,'FL'), (1,'GA'), (5,'NY'), (7,'FL'), (6,'NY');
CREATE TABLE t2 (id int NOT NULL, INDEX idx(id));
INSERT INTO t2 VALUES (7), (5), (1), (3);
SELECT id, st FROM t1
WHERE st IN ('GA','FL') AND EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id);
id	st
3	FL
1	GA
7	FL
SELECT id, st FROM t1
WHERE st IN ('GA','FL') AND EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id)
GROUP BY id;
id	st
1	GA
3	FL
7	FL
SELECT id, st FROM t1
WHERE st IN ('GA','FL') AND NOT EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id);
id	st
2	GA
4	FL
SELECT id, st FROM t1
WHERE st IN ('GA','FL') AND NOT EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id)
GROUP BY id;
id	st
2	GA
4	FL
DROP TABLE t1,t2;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
EXPLAIN EXTENDED
SELECT * FROM (SELECT count(*) FROM t1 GROUP BY a) as res;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary; Using filesort
Warnings:
Note	1003	select `res`.`count(*)` AS `count(*)` from (select count(0) AS `count(*)` from `test`.`t1` group by `test`.`t1`.`a`) `res`
DROP TABLE t1;
CREATE TABLE t1 (
a varchar(255) default NULL,
b timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
INDEX idx(a,b)
);
CREATE TABLE t2 (
a varchar(255) default NULL
);
INSERT INTO t1 VALUES ('abcdefghijk','2007-05-07 06:00:24');
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO `t1` VALUES ('asdf','2007-02-08 01:11:26');
INSERT INTO `t2` VALUES ('abcdefghijk');
INSERT INTO `t2` VALUES ('asdf');
SET session sort_buffer_size=8192;
SELECT (SELECT 1 FROM  t1 WHERE t1.a=t2.a ORDER BY t1.b LIMIT 1) AS d1 FROM t2;
d1
1
1
DROP TABLE t1,t2;
CREATE TABLE t1 (a INTEGER, b INTEGER);
CREATE TABLE t2 (x INTEGER);
INSERT INTO t1 VALUES (1,11), (2,22), (2,22);
INSERT INTO t2 VALUES (1), (2);
SELECT a, COUNT(b), (SELECT COUNT(b) FROM t2) FROM t1 GROUP BY a;
ERROR 21000: Subquery returns more than 1 row
SELECT a, COUNT(b), (SELECT COUNT(b)+0 FROM t2) FROM t1 GROUP BY a;
ERROR 21000: Subquery returns more than 1 row
SELECT (SELECT SUM(t1.a)/AVG(t2.x) FROM t2) FROM t1;
(SELECT SUM(t1.a)/AVG(t2.x) FROM t2)
3.3333
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES (1, 2), (1,3), (1,4), (2,1), (2,2);
SELECT a1.a, COUNT(*) FROM t1 a1 WHERE a1.a = 1
AND EXISTS( SELECT a2.a FROM t1 a2 WHERE a2.a = a1.a)
GROUP BY a1.a;
a	COUNT(*)
1	3
DROP TABLE t1;
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (1),(2);
INSERT INTO t2 VALUES (1),(2);
SELECT (SELECT SUM(t1.a) FROM t2 WHERE a=0) FROM t1;
(SELECT SUM(t1.a) FROM t2 WHERE a=0)
NULL
SELECT (SELECT SUM(t1.a) FROM t2 WHERE a!=0) FROM t1;
ERROR 21000: Subquery returns more than 1 row
SELECT (SELECT SUM(t1.a) FROM t2 WHERE a=1) FROM t1;
(SELECT SUM(t1.a) FROM t2 WHERE a=1)
3
DROP TABLE t1,t2;
CREATE TABLE t1 (a1 INT, a2 INT);
CREATE TABLE t2 (b1 INT, b2 INT);
INSERT INTO t1 VALUES (100, 200);
INSERT INTO t1 VALUES (101, 201);
INSERT INTO t2 VALUES (101, 201);
INSERT INTO t2 VALUES (103, 203);
SELECT ((a1,a2) IN (SELECT * FROM t2 WHERE b2 > 0)) IS NULL FROM t1;
((a1,a2) IN (SELECT * FROM t2 WHERE b2 > 0)) IS NULL
0
0
DROP TABLE t1, t2;
CREATE TABLE t1 (s1 BINARY(5), s2 VARBINARY(5));
INSERT INTO t1 VALUES (0x41,0x41), (0x42,0x42), (0x43,0x43);
SELECT s1, s2 FROM t1 WHERE s2 IN (SELECT s1 FROM t1);
s1	s2
SELECT s1, s2 FROM t1 WHERE (s2, 10) IN (SELECT s1, 10 FROM t1);
s1	s2
CREATE INDEX I1 ON t1 (s1);
CREATE INDEX I2 ON t1 (s2);
SELECT s1, s2 FROM t1 WHERE s2 IN (SELECT s1 FROM t1);
s1	s2
SELECT s1, s2 FROM t1 WHERE (s2, 10) IN (SELECT s1, 10 FROM t1);
s1	s2
TRUNCATE t1;
INSERT INTO t1 VALUES (0x41,0x41);
SELECT * FROM t1 WHERE s1 = (SELECT s2 FROM t1);
s1	s2
DROP TABLE t1;
CREATE TABLE t1 (a1 VARBINARY(2) NOT NULL DEFAULT '0', PRIMARY KEY (a1));
CREATE TABLE t2 (a2 BINARY(2) default '0', INDEX (a2));
CREATE TABLE t3 (a3 BINARY(2) default '0');
INSERT INTO t1 VALUES (1),(2),(3),(4);
INSERT INTO t2 VALUES (1),(2),(3);
INSERT INTO t3 VALUES (1),(2),(3);
SELECT LEFT(t2.a2, 1) FROM t2,t3 WHERE t3.a3=t2.a2;
LEFT(t2.a2, 1)
1
2
3
SELECT t1.a1, t1.a1 in (SELECT t2.a2 FROM t2,t3 WHERE t3.a3=t2.a2) FROM t1;
a1	t1.a1 in (SELECT t2.a2 FROM t2,t3 WHERE t3.a3=t2.a2)
1	0
2	0
3	0
4	0
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a1 BINARY(3) PRIMARY KEY, b1 VARBINARY(3));
CREATE TABLE t2 (a2 VARBINARY(3) PRIMARY KEY);
CREATE TABLE t3 (a3 VARBINARY(3) PRIMARY KEY);
INSERT INTO t1 VALUES (1,10), (2,20), (3,30), (4,40);
INSERT INTO t2 VALUES (2), (3), (4), (5);
INSERT INTO t3 VALUES (10), (20), (30);
SELECT LEFT(t1.a1,1) FROM t1,t3 WHERE t1.b1=t3.a3;
LEFT(t1.a1,1)
1
2
3
SELECT a2 FROM t2 WHERE t2.a2 IN (SELECT t1.a1 FROM t1,t3 WHERE t1.b1=t3.a3);
a2
DROP TABLE t1, t2, t3;
CREATE TABLE t1 (a CHAR(1), b VARCHAR(10));
INSERT INTO t1 VALUES ('a', 'aa');
INSERT INTO t1 VALUES ('a', 'aaa');
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
a	b
CREATE INDEX I1 ON t1 (a);
CREATE INDEX I2 ON t1 (b);
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	I2	NULL	NULL	NULL	2	Using where
1	PRIMARY	t1	ref	I1	I1	2	test.t1.b	2	Using where; Using index; FirstMatch(t1)
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
a	b
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
INSERT INTO t2 SELECT * FROM t1;
CREATE INDEX I1 ON t2 (a);
CREATE INDEX I2 ON t2 (b);
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	I2	NULL	NULL	NULL	2	Using where
1	PRIMARY	t2	ref	I1	I1	4	test.t2.b	2	Using where; Using index; FirstMatch(t2)
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
a	b
EXPLAIN
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	I2	NULL	NULL	NULL	2	Using where
1	PRIMARY	t1	ref	I1	I1	2	test.t1.b	2	Using where; Using index; FirstMatch(t1)
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
a	b
DROP TABLE t1,t2;
CREATE TABLE t1(a INT, b INT);
INSERT INTO t1 VALUES (1,1), (1,2), (2,3), (2,4);
EXPLAIN
SELECT a AS out_a, MIN(b) FROM t1
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = out_a)
GROUP BY a;
ERROR 42S22: Unknown column 'out_a' in 'where clause'
SELECT a AS out_a, MIN(b) FROM t1
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = out_a)
GROUP BY a;
ERROR 42S22: Unknown column 'out_a' in 'where clause'
EXPLAIN
SELECT a AS out_a, MIN(b) FROM t1 t1_outer
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = t1_outer.a)
GROUP BY a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1_outer	ALL	NULL	NULL	NULL	NULL	4	Using where; Using temporary; Using filesort
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
SELECT a AS out_a, MIN(b) FROM t1 t1_outer
WHERE b > (SELECT MIN(b) FROM t1 WHERE a = t1_outer.a)
GROUP BY a;
out_a	MIN(b)
1	2
2	4
DROP TABLE t1;
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(f11 int, f12 int);
create table t2(f21 int unsigned not null, f22 int, f23 varchar(10));
insert into t1 values(1,1),(2,2), (3, 3);
insert into t2
select -1 , (@a:=(A.a + 10 * (B.a + 10 * (C.a+10*D.a))))/5000 + 1, @a
from t0 A, t0 B, t0 C, t0 D;
set session sort_buffer_size= 33*1024;
select count(*) from t1 where f12 =
(select f22 from t2 where f22 = f12 order by f21 desc, f22, f23 limit 1);
count(*)
3
drop table t0,t1,t2;
CREATE TABLE t4 (
f7 varchar(32) collate utf8_bin NOT NULL default '',
f10 varchar(32) collate utf8_bin default NULL,
PRIMARY KEY  (f7)
);
INSERT INTO t4 VALUES(1,1), (2,null);
CREATE TABLE t2 (
f4 varchar(32) collate utf8_bin NOT NULL default '',
f2 varchar(50) collate utf8_bin default NULL,
f3 varchar(10) collate utf8_bin default NULL,
PRIMARY KEY  (f4),
UNIQUE KEY uk1 (f2)
);
INSERT INTO t2 VALUES(1,1,null), (2,2,null);
CREATE TABLE t1 (
f8 varchar(32) collate utf8_bin NOT NULL default '',
f1 varchar(10) collate utf8_bin default NULL,
f9 varchar(32) collate utf8_bin default NULL,
PRIMARY KEY  (f8)
);
INSERT INTO t1 VALUES (1,'P',1), (2,'P',1), (3,'R',2);
CREATE TABLE t3 (
f6 varchar(32) collate utf8_bin NOT NULL default '',
f5 varchar(50) collate utf8_bin default NULL,
PRIMARY KEY (f6)
);
INSERT INTO t3 VALUES (1,null), (2,null);
SELECT
IF(t1.f1 = 'R', a1.f2, t2.f2) AS a4,
IF(t1.f1 = 'R', a1.f3, t2.f3) AS f3,
SUM(
IF(
(SELECT VPC.f2
FROM t2 VPC, t4 a2, t2 a3
WHERE
VPC.f4 = a2.f10 AND a3.f2 = a4
LIMIT 1) IS NULL,
0,
t3.f5
)
) AS a6
FROM
t2, t3, t1 JOIN t2 a1 ON t1.f9 = a1.f4
GROUP BY a4;
a4	f3	a6
1	NULL	NULL
2	NULL	NULL
DROP TABLE t1, t2, t3, t4;
create table t1 (a float(5,4) zerofill);
create table t2 (a float(5,4),b float(2,0));
select t1.a from t1 where
t1.a= (select b from t2 limit 1) and not
t1.a= (select a from t2 limit 1) ;
a
drop table t1, t2;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
4472 4473
1	PRIMARY	<subquery2>	const	distinct_key	distinct_key	4	const	1	100.00	
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary
4474
Warnings:
4475
Note	1003	select 1 AS `1` from  <materialize> (select 1 from `test`.`t1` group by `test`.`t1`.`a`) join `test`.`t1` where (`<subquery2>`.`1` = 1)
4476 4477 4478
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
4479 4480
1	PRIMARY	<subquery2>	const	distinct_key	distinct_key	4	const	1	100.00	
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using temporary
4481
Warnings:
4482
Note	1003	select 1 AS `1` from  <materialize> (select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a`) join `test`.`t1` where (`<subquery2>`.`1` = 1)
4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163
DROP TABLE t1;
#
# Bug#45061: Incorrectly market field caused wrong result.
#
CREATE TABLE `C` (
`int_nokey` int(11) NOT NULL,
`int_key` int(11) NOT NULL,
KEY `int_key` (`int_key`)
);
INSERT INTO `C` VALUES (9,9), (0,0), (8,6), (3,6), (7,6), (0,4),
(1,7), (9,4), (0,8), (9,4), (0,7), (5,5), (0,0), (8,5), (8,7),
(5,2), (1,8), (7,0), (0,9), (9,5);
SELECT * FROM C WHERE `int_key` IN (SELECT `int_nokey`);
int_nokey	int_key
9	9
0	0
5	5
0	0
EXPLAIN EXTENDED SELECT * FROM C WHERE `int_key` IN (SELECT `int_nokey`);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	C	ALL	NULL	NULL	NULL	NULL	20	100.00	Using where
DROP TABLE C;
# End of test for bug#45061.
#
# Bug #46749: Segfault in add_key_fields() with outer subquery level 
#   field references
#
CREATE TABLE t1 (
a int,
b int,
UNIQUE (a), KEY (b)
);
INSERT INTO t1 VALUES (1,1), (2,1);
CREATE TABLE st1 like t1;
INSERT INTO st1 VALUES (1,1), (2,1);
CREATE TABLE st2 like t1;
INSERT INTO st2 VALUES (1,1), (2,1);
EXPLAIN
SELECT MAX(b), (SELECT COUNT(*) FROM st1,st2 WHERE st2.b <= t1.b)
FROM t1 
WHERE a = 230;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
SELECT MAX(b), (SELECT COUNT(*) FROM st1,st2 WHERE st2.b <= t1.b)
FROM t1 
WHERE a = 230;
MAX(b)	(SELECT COUNT(*) FROM st1,st2 WHERE st2.b <= t1.b)
NULL	0
DROP TABLE t1, st1, st2;
#
# Bug #48709: Assertion failed in sql_select.cc:11782: 
#   int join_read_key(JOIN_TAB*)
#
CREATE TABLE t1 (pk int PRIMARY KEY, int_key int);
INSERT INTO t1 VALUES (10,1), (14,1);
CREATE TABLE t2 (pk int PRIMARY KEY, int_key int);
INSERT INTO t2 VALUES (3,3), (5,NULL), (7,3);
# should have eq_ref for t1
EXPLAIN
SELECT * FROM t2 outr
WHERE outr.int_key NOT IN (SELECT t1.pk FROM t1, t2)  
ORDER BY outr.pk;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
x	x	outr	ALL	x	x	x	x	x	x
x	x	t1	eq_ref	x	x	x	x	x	x
x	x	t2	index	x	x	x	x	x	x
# should not crash on debug binaries
SELECT * FROM t2 outr
WHERE outr.int_key NOT IN (SELECT t1.pk FROM t1, t2)  
ORDER BY outr.pk;
pk	int_key
3	3
7	3
DROP TABLE t1,t2;
End of 5.0 tests.
create table t_out (subcase char(3),
a1 char(2), b1 char(2), c1 char(2));
create table t_in  (a2 char(2), b2 char(2), c2 char(2));
insert into t_out values ('A.1','2a', NULL, '2a');
insert into t_out values ('A.3', '2a', NULL, '2a');
insert into t_out values ('A.4', '2a', NULL, 'xx');
insert into t_out values ('B.1', '2a', '2a', '2a');
insert into t_out values ('B.2', '2a', '2a', '2a');
insert into t_out values ('B.3', '3a', 'xx', '3a');
insert into t_out values ('B.4', 'xx', '3a', '3a');
insert into t_in values ('1a', '1a', '1a');
insert into t_in values ('2a', '2a', '2a');
insert into t_in values (NULL, '2a', '2a');
insert into t_in values ('3a', NULL, '3a');

Test general IN semantics (not top-level)

case A.1
select subcase,
(a1, b1, c1)     IN (select * from t_in where a2 = 'no_match') pred_in,
(a1, b1, c1) NOT IN (select * from t_in where a2 = 'no_match') pred_not_in
from t_out where subcase = 'A.1';
subcase	pred_in	pred_not_in
A.1	0	1
case A.2 - impossible
case A.3
select subcase,
(a1, b1, c1)     IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'A.3';
subcase	pred_in	pred_not_in
A.3	NULL	NULL
case A.4
select subcase,
(a1, b1, c1)     IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'A.4';
subcase	pred_in	pred_not_in
A.4	0	1
case B.1
select subcase,
(a1, b1, c1)     IN (select * from t_in where a2 = 'no_match') pred_in,
(a1, b1, c1) NOT IN (select * from t_in where a2 = 'no_match') pred_not_in
from t_out where subcase = 'B.1';
subcase	pred_in	pred_not_in
B.1	0	1
case B.2
select subcase,
(a1, b1, c1)     IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'B.2';
subcase	pred_in	pred_not_in
B.2	1	0
case B.3
select subcase,
(a1, b1, c1)     IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'B.3';
subcase	pred_in	pred_not_in
B.3	NULL	NULL
case B.4
select subcase,
(a1, b1, c1)     IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'B.4';
subcase	pred_in	pred_not_in
B.4	0	1

Test IN as top-level predicate, and
as non-top level for cases A.3, B.3 (the only cases with NULL result).

case A.1
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'A.1' and
(a1, b1, c1) IN (select * from t_in where a1 = 'no_match');
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'A.1' and
(a1, b1, c1) NOT IN (select * from t_in where a1 = 'no_match');
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'A.1' and
NOT((a1, b1, c1) IN (select * from t_in where a1 = 'no_match'));
not_pred_in
T
case A.3
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'A.3' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'A.3' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
F
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'A.3' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
F
select case when count(*) > 0 then 'N' else 'wrong result' end as pred_in from t_out
where subcase = 'A.3' and
((a1, b1, c1) IN (select * from t_in)) is NULL and
((a1, b1, c1) NOT IN (select * from t_in)) is NULL;
pred_in
N
case A.4
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'A.4' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'A.4' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'A.4' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
T
case B.1
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.1' and
(a1, b1, c1) IN (select * from t_in where a1 = 'no_match');
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.1' and
(a1, b1, c1) NOT IN (select * from t_in where a1 = 'no_match');
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.1' and
NOT((a1, b1, c1) IN (select * from t_in where a1 = 'no_match'));
not_pred_in
T
case B.2
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.2' and
(a1, b1, c1) IN (select * from t_in);
pred_in
T
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.2' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
F
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.2' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
F
case B.3
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.3' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.3' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
F
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.3' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
F
select case when count(*) > 0 then 'N' else 'wrong result' end as pred_in from t_out
where subcase = 'B.3' and
((a1, b1, c1) IN (select * from t_in)) is NULL and
((a1, b1, c1) NOT IN (select * from t_in)) is NULL;
pred_in
N
case B.4
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.4' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.4' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.4' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
T
drop table t_out;
drop table t_in;
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES (2,22),(1,11),(2,22);
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
a
1
2
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
a
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
a
1
2
SET @@sql_mode='ansi';
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
ERROR HY000: Invalid use of group function
SET @@sql_mode=default;
DROP TABLE t1;
CREATE TABLE t1 (s1 CHAR(1));
INSERT INTO t1 VALUES ('a');
SELECT * FROM t1 WHERE _utf8'a' = ANY (SELECT s1 FROM t1);
s1
a
DROP TABLE t1;
CREATE TABLE t1(c INT, KEY(c));
CREATE TABLE t2(a INT, b INT);
INSERT INTO t2 VALUES (1, 10), (2, NULL);
INSERT INTO t1 VALUES (1), (3);
SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
a	b
DROP TABLE t1,t2;
CREATE TABLE t1(pk INT PRIMARY KEY, a INT, INDEX idx(a));
INSERT INTO t1 VALUES (1, 10), (3, 30), (2, 20);
CREATE TABLE t2(pk INT PRIMARY KEY, a INT, b INT, INDEX idxa(a));
INSERT INTO t2 VALUES (2, 20, 700), (1, 10, 200), (4, 10, 100);
SELECT * FROM t1
WHERE EXISTS (SELECT DISTINCT a FROM t2 WHERE t1.a < t2.a ORDER BY b);
pk	a
1	10
3	30
2	20
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a), KEY b (b));
INSERT INTO t1 VALUES (1,NULL), (9,NULL);
CREATE TABLE t2 (
a INT,
b INT,
c INT,
d INT,
PRIMARY KEY (a),
UNIQUE KEY b (b,c,d),
KEY b_2 (b),
KEY c (c),
KEY d (d)
);
INSERT INTO t2 VALUES
(43, 2, 11 ,30),
(44, 2, 12 ,30),
(45, 1, 1  ,10000),
(46, 1, 2  ,10000),
(556,1, 32 ,10000);
CREATE TABLE t3 (
a INT,
b INT,
c INT,
PRIMARY KEY (a),
UNIQUE KEY b (b,c),
KEY c (c),
KEY b_2 (b)
);
INSERT INTO t3 VALUES (1,1,1), (2,32,1);
explain
SELECT t1.a, (SELECT 1 FROM t2 WHERE t2.b=t3.c AND t2.c=t1.a ORDER BY t2.d LIMIT 1) AS incorrect FROM t1, t3 WHERE t3.b=t1.a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	index	PRIMARY	PRIMARY	4	NULL	2	Using index
1	PRIMARY	t3	ref	b,b_2	b	5	test.t1.a	1	Using index
2	DEPENDENT SUBQUERY	t2	ref	b,b_2,c	b	10	test.t3.c,test.t1.a	1	Using where; Using index; Using filesort
SELECT t1.a, (SELECT 1 FROM t2 WHERE t2.b=t3.c AND t2.c=t1.a ORDER BY t2.d LIMIT 1) AS incorrect FROM t1, t3 WHERE t3.b=t1.a;
a	incorrect
1	1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int, c int);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
CREATE VIEW v1 AS
SELECT t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
UPDATE v1 SET c=1;
CREATE VIEW v2 (a,b) AS
SELECT t2.id, t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
INSERT INTO v2(a,b) VALUES (2,2);
ERROR HY000: CHECK OPTION failed 'test.v2'
SELECT * FROM v1;
c
1
1
1
1
CREATE VIEW v3 AS
SELECT t2.c AS c FROM t2
WHERE 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
DELETE FROM v3;
DROP VIEW v1,v2,v3;
DROP TABLE t1,t2;
#
# BUG#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
#
create table t1(id integer primary key, g integer, v integer, s char(1));
create table t2(id integer primary key, g integer, v integer, s char(1));
insert into t1 values
(10, 10, 10,   'l'),
(20, 20, 20,   'l'),
(40, 40, 40,   'l'),
(41, 40, null, 'l'),
(50, 50, 50,   'l'),
(51, 50, null, 'l'),
(60, 60, 60,   'l'),
(61, 60, null, 'l'),
(70, 70, 70,   'l'),
(90, 90, null, 'l');
insert into t2 values
(10, 10, 10,   'r'),
(30, 30, 30,   'r'),
(50, 50, 50,   'r'),
(60, 60, 60,   'r'),
(61, 60, null, 'r'),
(70, 70, 70,   'r'),
(71, 70, null, 'r'),
(80, 80, 80,   'r'),
(81, 80, null, 'r'),
(100,100,null, 'r');
select *
from t1
where v in(select v
from t2
where t1.g=t2.g) is unknown;
id	g	v	s
51	50	NULL	l
61	60	NULL	l
drop table t1, t2;
#
# Bug#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
#
create table t1(id integer primary key, g integer, v integer, s char(1));
create table t2(id integer primary key, g integer, v integer, s char(1));
insert into t1 values
(10, 10, 10,   'l'),
(20, 20, 20,   'l'),
(40, 40, 40,   'l'),
(41, 40, null, 'l'),
(50, 50, 50,   'l'),
(51, 50, null, 'l'),
(60, 60, 60,   'l'),
(61, 60, null, 'l'),
(70, 70, 70,   'l'),
(90, 90, null, 'l');
insert into t2 values
(10, 10, 10,   'r'),
(30, 30, 30,   'r'),
(50, 50, 50,   'r'),
(60, 60, 60,   'r'),
(61, 60, null, 'r'),
(70, 70, 70,   'r'),
(71, 70, null, 'r'),
(80, 80, 80,   'r'),
(81, 80, null, 'r'),
(100,100,null, 'r');
select *
from t1
where v in(select v
from t2
where t1.g=t2.g) is unknown;
id	g	v	s
51	50	NULL	l
61	60	NULL	l
drop table t1, t2;
CREATE TABLE t1 (a ENUM('rainbow'));
INSERT INTO t1 VALUES (),(),(),(),();
SELECT 1 FROM t1 GROUP BY (SELECT 1 FROM t1 ORDER BY AVG(LAST_INSERT_ID()));
1
1
DROP TABLE t1;
CREATE TABLE t1 (a LONGBLOB);
INSERT INTO t1 SET a = 'aaaa';
INSERT INTO t1 SET a = 'aaaa';
SELECT 1 FROM t1 GROUP BY
(SELECT LAST_INSERT_ID() FROM t1 ORDER BY MIN(a) ASC LIMIT 1);
1
1
DROP TABLE t1;
#
# Bug #49512 : subquery with aggregate function crash 
#   subselect_single_select_engine::exec()
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES();
# should not crash
SELECT 1 FROM t1 WHERE a <> SOME
(
SELECT MAX((SELECT a FROM t1 LIMIT 1)) AS d
FROM t1,t1 a
);
1
DROP TABLE t1;
#
# Bug #45989 take 2 : memory leak after explain encounters an 
# error in the query
#
CREATE TABLE t1(a LONGTEXT);
INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet));
INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet));
EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
(SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) AS d1  
WHERE t1.a = d1.a;
ERROR 42S22: Unknown column 'd1.a' in 'where clause'
DROP TABLE t1;
End of 5.1 tests.
Set up test tables.
CREATE TABLE t1 (
t1_id INT UNSIGNED,
PRIMARY KEY(t1_id)
) Engine=MyISAM;
INSERT INTO t1 (t1_id) VALUES (1), (2), (3), (4), (5);
CREATE TABLE t2 SELECT * FROM t1;
CREATE TABLE t3 (
t3_id INT UNSIGNED AUTO_INCREMENT,
t1_id INT UNSIGNED,
amount DECIMAL(16,2),
PRIMARY KEY(t3_id),
KEY(t1_id)
) Engine=MyISAM;
INSERT INTO t3 (t1_id, t3_id, amount) 
VALUES (1, 1, 100.00), (2, 2, 200.00), (4, 4, 400.00);
This is the 'inner query' running by itself.
Produces correct results.
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id
;
t1_id	total_amount
1	100.00
2	200.00
3	0.00
4	400.00
5	0.00
SELECT * FROM (the same inner query)
Produces correct results.
SELECT * FROM (
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id
) AS t;
t1_id	total_amount
1	100.00
2	200.00
3	0.00
4	400.00
5	0.00
Now make t2.t1_id part of a key.
ALTER TABLE t2 ADD PRIMARY KEY(t1_id);
Same inner query by itself.
Still correct results.
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id;
t1_id	total_amount
1	100.00
2	200.00
3	0.00
4	400.00
5	0.00
SELECT * FROM (the same inner query), now with indexes on the LEFT JOIN
SELECT * FROM (
SELECT
t1.t1_id,
IFNULL((SELECT SUM(amount) FROM t3 WHERE t3.t1_id=t1.t1_id), 0) AS total_amount
FROM
t1
LEFT JOIN t2 ON t2.t1_id=t1.t1_id
GROUP BY
t1.t1_id
) AS t;
t1_id	total_amount
1	100.00
2	200.00
3	0.00
4	400.00
5	0.00
DROP TABLE t3;
DROP TABLE t2;
DROP TABLE t1;
#
# Bug #52711: Segfault when doing EXPLAIN SELECT with 
#  union...order by (select... where...)
#
CREATE TABLE t1 (a VARCHAR(10), FULLTEXT KEY a (a));
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (1),(2);
# Should not crash
EXPLAIN
SELECT * FROM t2 UNION SELECT * FROM t2
ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));
# Should not crash
SELECT * FROM t2 UNION SELECT * FROM t2
ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));
DROP TABLE t1,t2;
# LP BUG#675248 - select->prep_where references on freed memory 
CREATE TABLE t1 (a int, b int);
insert into t1 values (1,1),(0,0);
CREATE TABLE t2 (c int);
insert into t2 values (1),(2);
prepare stmt1 from "select sum(a),(select sum(c) from t2 where table1.b) as sub
from t1 as table1 group by sub";
execute stmt1;
sum(a)	sub
0	NULL
1	3
deallocate prepare stmt1;
prepare stmt1 from "select sum(a),(select sum(c) from t2 having table1.b) as sub
from t1 as table1";
execute stmt1;
sum(a)	sub
1	3
deallocate prepare stmt1;
drop table t1,t2;
#
# Bug LP#693935/#58727: Assertion failure with 
# a single row subquery returning more than one row
#
create table t1 (a char(1) charset utf8);
insert into t1 values ('a'), ('b');
create table t2 (a binary(1));
insert into t2 values ('x'), ('y');
select * from t2 where a=(select a from t1) and a='x';
ERROR 21000: Subquery returns more than 1 row
drop table t1,t2;
End of 5.1 tests
#
# No BUG#, a case brought from 5.2's innodb_mysql_lock.test
#
create table t1 (i int  not null primary key);
insert into t1 values (1),(2),(3),(4),(5);
create table t2 (j int not null  primary key);
insert into t2 values (1),(2),(3),(4),(5);
create table t3 (k int not null primary key);
insert into t3 values (1),(2),(3);
create view v2 as select t2.j as j from t2 where t2.j in (select t1.i from t1);
select * from t3 where k in (select j from v2);
k
1
2
3
drop table t1,t2,t3;
drop view v2;
#
# Bug#52068: Optimizer generates invalid semijoin materialization plan
#
drop table if exists ot1, ot2, it1, it2;
CREATE TABLE ot1(a INTEGER);
INSERT INTO ot1 VALUES(5), (8);
CREATE TABLE it2(a INTEGER);
INSERT INTO it2 VALUES(9), (5), (1), (8);
CREATE TABLE it3(a INTEGER);
INSERT INTO it3 VALUES(7), (1), (0), (5), (1), (4);
CREATE TABLE ot4(a INTEGER);
INSERT INTO ot4 VALUES(1), (3), (5), (7), (9), (7), (3), (1);
SELECT * FROM ot1,ot4
WHERE (ot1.a,ot4.a) IN (SELECT it2.a,it3.a
FROM it2,it3);
a	a
5	1
8	1
5	5
8	5
5	7
8	7
5	7
8	7
5	1
8	1
explain SELECT * FROM ot1,ot4
WHERE (ot1.a,ot4.a) IN (SELECT it2.a,it3.a
FROM it2,it3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
5164 5165 5166 5167 5168
1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	24	Using where
1	PRIMARY	ot4	ALL	NULL	NULL	NULL	NULL	8	Using where; Using join buffer (flat, BNL join)
2	SUBQUERY	it2	ALL	NULL	NULL	NULL	NULL	4	
2	SUBQUERY	it3	ALL	NULL	NULL	NULL	NULL	6	Using join buffer (flat, BNL join)
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DROP TABLE IF EXISTS ot1, ot4, it2, it3;
#
# Bug#729039: NULL keys used to evaluate subquery
#
CREATE TABLE t1 (a int) ;
INSERT INTO t1 VALUES (NULL), (1), (NULL), (2);
CREATE TABLE t2 (a int, INDEX idx(a)) ;
INSERT INTO t2 VALUES (NULL), (1), (NULL);
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 USE INDEX () WHERE t2.a = t1.a);
a
1
EXPLAIN
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 USE INDEX() WHERE t2.a = t1.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
a
1
EXPLAIN
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
2	DEPENDENT SUBQUERY	t2	ref	idx	idx	5	test.t1.a	2	Using index
DROP TABLE t1,t2;
#
# BUG#752992: Wrong results for a subquery with 'semijoin=on'
#
CREATE TABLE t1 (pk INTEGER PRIMARY KEY, i INTEGER NOT NULL);
INSERT INTO t1 VALUES (11,0);
INSERT INTO t1 VALUES (12,5);
INSERT INTO t1 VALUES (15,0);
CREATE TABLE t2 (pk INTEGER PRIMARY KEY, i INTEGER NOT NULL);
INSERT INTO t2 VALUES (11,1);
INSERT INTO t2 VALUES (12,2);
INSERT INTO t2 VALUES (15,4);
EXPLAIN SELECT * FROM t1 WHERE pk IN (SELECT it.pk FROM t2 JOIN t2 AS it ON 1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
5211 5212
1	PRIMARY	t1	ALL	PRIMARY	NULL	NULL	NULL	3	
1	PRIMARY	t2	index	NULL	PRIMARY	4	NULL	3	Using index; Start temporary; Using join buffer (flat, BNL join)
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1	PRIMARY	it	eq_ref	PRIMARY	PRIMARY	4	test.t1.pk	1	Using index; End temporary
SELECT * FROM t1 WHERE pk IN (SELECT it.pk FROM t2 JOIN t2 AS it ON 1);
pk	i
11	0
12	5
15	0
DROP table t1,t2;
#
# Bug#751350: crash with pushed condition for outer references when
#             there should be none of such conditions
#
CREATE TABLE t1 (a int, b int) ;
INSERT INTO t1 VALUES (0,0),(0,0);
EXPLAIN
SELECT b FROM t1
WHERE ('0') IN ( SELECT a  FROM t1 GROUP BY a )
GROUP BY b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary; Using filesort
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary
SELECT b FROM t1
WHERE ('0') IN ( SELECT a  FROM t1 GROUP BY a )
GROUP BY b;
b
0
DROP TABLE t1;
#
# Bug #11765713 58705:
# OPTIMIZER LET ENGINE DEPEND ON UNINITIALIZED VALUES
# CREATED BY OPT_SUM_QUERY
#
CREATE TABLE t1(a INT NOT NULL, KEY (a));
INSERT INTO t1 VALUES (0), (1);
SELECT 1 as foo FROM t1 WHERE a < SOME
(SELECT a FROM t1 WHERE a <=>
(SELECT a FROM t1)
);
ERROR 21000: Subquery returns more than 1 row
SELECT 1 as foo FROM t1 WHERE a < SOME
(SELECT a FROM t1 WHERE a <=>
(SELECT a FROM t1 where a is null)
);
foo
DROP TABLE t1;
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CREATE TABLE t1 (a int(11), b varchar(1));
INSERT INTO t1 VALUES (2,NULL),(5,'d'),(7,'g');
SELECT a FROM t1 WHERE b < ANY ( SELECT b FROM t1 GROUP BY b );
a
5
SELECT a FROM t1 WHERE b < ANY ( SELECT b FROM t1 );
a
5
SELECT a FROM t1 WHERE b > ANY ( SELECT b FROM t1 GROUP BY b );
a
7
SELECT a FROM t1 WHERE b > ANY ( SELECT b FROM t1 );
a
7
SELECT a FROM t1 WHERE b <= ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b <= ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b >= ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b >= ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b = ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b = ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b <> ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b <> ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b < ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b < ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b > ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b > ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b <= ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b <= ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b >= ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b >= ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b = ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b = ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b <> ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b <> ALL ( SELECT b FROM t1 GROUP BY b );
a
delete from t1;
INSERT INTO t1 VALUES (2,NULL),(5,'d'),(7,'g');
SELECT a FROM t1 WHERE b < ANY ( SELECT b FROM t1 GROUP BY b );
a
5
SELECT a FROM t1 WHERE b < ANY ( SELECT b FROM t1 );
a
5
SELECT a FROM t1 WHERE b > ANY ( SELECT b FROM t1 GROUP BY b );
a
7
SELECT a FROM t1 WHERE b > ANY ( SELECT b FROM t1 );
a
7
SELECT a FROM t1 WHERE b <= ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b <= ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b >= ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b >= ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b = ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b = ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b <> ANY ( SELECT b FROM t1 );
a
5
7
SELECT a FROM t1 WHERE b <> ANY ( SELECT b FROM t1 GROUP BY b );
a
5
7
SELECT a FROM t1 WHERE b < ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b < ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b > ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b > ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b <= ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b <= ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b >= ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b >= ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b = ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b = ALL ( SELECT b FROM t1 GROUP BY b );
a
SELECT a FROM t1 WHERE b <> ALL ( SELECT b FROM t1 );
a
SELECT a FROM t1 WHERE b <> ALL ( SELECT b FROM t1 GROUP BY b );
a
drop table t1;
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#
# Fix of LP BUG#780386 (NULL left part with empty ALL subquery).
#
CREATE TABLE t1 ( f11 int) ;
INSERT IGNORE INTO t1 VALUES (0),(0);
CREATE TABLE t2 ( f3 int, f10 int, KEY (f10,f3)) ;
INSERT IGNORE INTO t2 VALUES (NULL,NULL),(5,0);
DROP TABLE IF EXISTS t3;
Warnings:
Note	1051	Unknown table 't3'
CREATE TABLE t3 ( f3 int) ;
INSERT INTO t3 VALUES (0),(0);
SELECT a1.f3 AS r FROM t2 AS a1 , t1 WHERE a1.f3 < ALL ( SELECT f3 FROM t3 WHERE f3 = 1 ) ;
r
NULL
5
NULL
5
DROP TABLE t1, t2, t3;
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End of 5.2 tests
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#
# BUG#779885: Crash in eliminate_item_equal with materialization=on in
# maria-5.3
#
CREATE TABLE t1 ( f1 int );
INSERT INTO t1 VALUES (19), (20);
CREATE TABLE t2 ( f10 varchar(32) );
INSERT INTO t2 VALUES ('c'),('d');
CREATE TABLE t3 ( f10 varchar(32) );
INSERT INTO t3 VALUES ('a'),('b');
SELECT *
FROM t1
WHERE
( 't' ) IN (
SELECT t3.f10
FROM t3
JOIN t2
ON t2.f10 = t3.f10
);
f1
DROP TABLE t1,t2,t3;
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#
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# BUG LP:813473: Wrong result with outer join + NOT IN subquery
# This bug is a duplicate of Bug#11764086 whose test case is added below
#
CREATE TABLE t1 (c int) ;
INSERT INTO t1 VALUES (5),(6);
CREATE TABLE t2 (a int, b int) ;
INSERT INTO t2 VALUES (20,9),(20,9);
create table t3 (d int, e int);
insert into t3 values (2, 9), (3,10);
EXPLAIN
SELECT t2.b , t1.c
FROM t2 LEFT JOIN t1 ON t1.c < 3
WHERE (t2.b , t1.c) NOT IN (SELECT * from t3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where
SELECT t2.b , t1.c
FROM t2 LEFT JOIN t1 ON t1.c < 3
WHERE (t2.b, t1.c) NOT IN (SELECT * from t3);
b	c
9	NULL
9	NULL
drop table t1, t2, t3;
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End of 5.3 tests
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End of 5.5 tests.
#
# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
#
CREATE TABLE t1(a1 int);
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2(a1 int);
INSERT INTO t2 VALUES (3);
SELECT @@session.sql_mode INTO @old_sql_mode;
SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
1
1
1
SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
1
1
1
SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
1
SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
1
1
1
SET SESSION sql_mode=@old_sql_mode;
DROP TABLE t1, t2;
#
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# Bug#11764086: Null left operand to NOT IN in WHERE clause
# behaves differently than real NULL
#
CREATE TABLE parent (id int);
INSERT INTO parent VALUES (1), (2);
CREATE TABLE child (parent_id int, other int);
INSERT INTO child VALUES (1,NULL);
# Offending query (c.parent_id is NULL for null-complemented rows only)
SELECT    p.id, c.parent_id
FROM      parent p
LEFT JOIN child  c
ON        p.id = c.parent_id
WHERE     c.parent_id NOT IN (
SELECT parent_id 
FROM   child
WHERE  parent_id = 3
);
id	parent_id
1	1
2	NULL
# Some syntactic variations with IS FALSE and IS NOT TRUE
SELECT    p.id, c.parent_id
FROM      parent p
LEFT JOIN child  c
ON        p.id = c.parent_id
WHERE     c.parent_id IN (
SELECT parent_id 
FROM   child
WHERE  parent_id = 3
) IS NOT TRUE;
id	parent_id
1	1
2	NULL
SELECT    p.id, c.parent_id
FROM      parent p
LEFT JOIN child  c
ON        p.id = c.parent_id
WHERE     c.parent_id IN (
SELECT parent_id 
FROM   child
WHERE  parent_id = 3
) IS FALSE;
id	parent_id
1	1
2	NULL
DROP TABLE parent, child;
# End of test for bug#11764086.
#
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# BUG#50257: Missing info in REF column of the EXPLAIN 
#            lines for subselects
#
CREATE TABLE t1 (a INT, b INT, INDEX (a));
INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);

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set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
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EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
2	DERIVED	t1	ref	a	a	5	const	1	
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set optimizer_switch=@tmp_optimizer_switch;
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EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
2	SUBQUERY	t1	ref	a	a	5	const	1	Using index

DROP TABLE t1;
#
# Bug 11765699 - 58690: !TABLE || (!TABLE->READ_SET || 
#                BITMAP_IS_SET(TABLE->READ_SET, FIELD_INDEX
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES (0), (1);
CREATE TABLE t2(
b TEXT, 
c INT, 
PRIMARY KEY (b(1))
);
INSERT INTO t2 VALUES ('a', 2), ('b', 3);
SELECT 1 FROM t1 WHERE a = 
(SELECT 1 FROM t2 WHERE b = 
(SELECT 1 FROM t1 t11 WHERE c = 1 OR t1.a = 1 AND 1 = 2)
ORDER BY b
);
1
SELECT 1 FROM t1 WHERE a = 
(SELECT 1 FROM t2 WHERE b = 
(SELECT 1 FROM t1 t11 WHERE c = 1 OR t1.a = 1 AND 1 = 2)
GROUP BY b
);
1
DROP TABLE t1, t2;
#
# BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
#
CREATE TABLE t1 (f1 varchar(1));
INSERT INTO t1 VALUES ('v'),('s');
CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
('d'),('y'),('t'),('d'),('s');
SELECT table1.f1, table2.f1_key
FROM t1 AS table1, t2 AS table2
WHERE EXISTS 
( 
SELECT DISTINCT f1_key 
FROM t2 
WHERE f1_key != table2.f1_key AND f1_key >= table1.f1 );
f1	f1_key
v	j
s	j
v	v
s	v
v	c
s	c
v	m
s	m
v	d
s	d
v	d
s	d
v	y
s	y
v	t
s	t
v	d
s	d
v	s
s	s
explain SELECT table1.f1, table2.f1_key
FROM t1 AS table1, t2 AS table2
WHERE EXISTS 
( 
SELECT DISTINCT f1_key 
FROM t2 
WHERE f1_key != table2.f1_key AND f1_key >= table1.f1 );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	table1	ALL	NULL	NULL	NULL	NULL	2	
1	PRIMARY	table2	index	NULL	f1_key	4	NULL	10	Using where; Using index; Using join buffer (flat, BNL join)
2	DEPENDENT SUBQUERY	t2	range	f1_key	f1_key	4	NULL	6	Range checked for each record (index map: 0x1); Using temporary
DROP TABLE t1,t2;
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#
# LP bug #826279: assertion failure with GROUP BY a result of subquery
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (0), (0);
CREATE TABLE t2 (a int, b int, c int);
INSERT INTO t2 VALUES (10,7,0), (0,7,0);
CREATE TABLE t3 (a int, b int);
INSERT INTO t3 VALUES (10,7), (0,7);
SELECT SUM(DISTINCT b),
(SELECT t2.a FROM t1 JOIN t2 ON t2.c != 0
WHERE t.a != 0 AND t2.a != 0)
FROM (SELECT * FROM t3) AS t
GROUP BY 2;
SUM(DISTINCT b)	(SELECT t2.a FROM t1 JOIN t2 ON t2.c != 0
WHERE t.a != 0 AND t2.a != 0)
7	NULL
SELECT SUM(DISTINCT b), 
(SELECT t2.a FROM t1,t2 WHERE t.a != 0 or 1=2 LIMIT 1)
FROM (SELECT * FROM t3) AS t
GROUP BY 2;
SUM(DISTINCT b)	(SELECT t2.a FROM t1,t2 WHERE t.a != 0 or 1=2 LIMIT 1)
7	NULL
7	10
DROP TABLE t1,t2,t3;
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#
# Bug#12329653 
# EXPLAIN, UNION, PREPARED STATEMENT, CRASH, SQL_FULL_GROUP_BY
#
CREATE TABLE t1(a1 int);
INSERT INTO t1 VALUES (1),(2);
SELECT @@session.sql_mode INTO @old_sql_mode;
SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
1
1
1
PREPARE stmt FROM 
'SELECT 1 UNION ALL 
SELECT 1 FROM t1
ORDER BY
(SELECT 1 FROM t1 AS t1_0  
  WHERE 1 < SOME (SELECT a1 FROM t1)
)' ;
EXECUTE stmt ;
ERROR 21000: Subquery returns more than 1 row
EXECUTE stmt ;
ERROR 21000: Subquery returns more than 1 row
SET SESSION sql_mode=@old_sql_mode;
DEALLOCATE PREPARE stmt;
DROP TABLE t1;
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#
# LP BUG#833777 Performance regression with deeply nested subqueries
#
create table t1 (a int not null, b char(10) not null);
insert into t1 values (1, 'a');
set @@optimizer_switch='in_to_exists=on,semijoin=off,materialization=off,subquery_cache=off';
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select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1 where a in (select a from t1)))))))))))))))))))))))))))));
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a
1
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set @@optimizer_switch=@subselect_tmp;
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drop table t1;
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#
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# LP BUG#894397 Wrong result with in_to_exists, constant table , semijoin=OFF,materialization=OFF
#
CREATE TABLE t1 (a varchar(3));
INSERT INTO t1 VALUES ('AAA'),('BBB');
CREATE TABLE t2 (a varchar(3));
INSERT INTO t2 VALUES ('CCC');
set @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquery_cache=off';
SELECT * FROM t1 WHERE t1.a IN (SELECT t2.a FROM t2 WHERE t2.a < 'ZZZ');
a
set @@optimizer_switch=@subselect_tmp;
drop table t1, t2;
#
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# LP bug #859375: Assertion `0' failed in st_select_lex_unit::optimize
# with view , UNION and prepared statement (rewriting fake_select
# condition).
#
CREATE TABLE t1 ( f1 int NOT NULL, f4 varchar(1) NOT NULL) ;
INSERT INTO t1 VALUES (6,'d'),(7,'y');
CREATE TABLE t2 ( f1 int NOT NULL, f2 int NOT NULL) ;
INSERT INTO t2 VALUES (10,7);
CREATE VIEW v2 AS SELECT * FROM t2;
PREPARE st1 FROM "
        SELECT *
        FROM t1
        LEFT JOIN v2 ON ( v2.f2 = t1.f1 )
        WHERE v2.f1 NOT IN (
                SELECT 1 UNION
                SELECT 247
        )
";
EXECUTE st1;
f1	f4	f1	f2
7	y	10	7
deallocate prepare st1;
DROP VIEW v2;
DROP TABLE t1,t2;
#
# LP bug #887458 Crash in subselect_union_engine::no_rows with
# double UNION and join_cache_level=3,8
# (IN/ALL/ANY optimizations should not be applied to fake_select)
CREATE TABLE t2 ( a int, b varchar(1)) ;
INSERT IGNORE INTO t2 VALUES (8,'y'),(8,'y');
CREATE TABLE t1 ( b varchar(1)) ;
INSERT IGNORE INTO t1 VALUES (NULL),(NULL);
set @save_join_cache_level=@@join_cache_level;
SET SESSION join_cache_level=3;
SELECT *
FROM t1, t2
WHERE t2.b IN (
SELECT 'm' UNION
SELECT 'm'
) OR t1.b <> SOME (
SELECT 'v' UNION
SELECT 't'
);
b	a	b
set @@join_cache_level= @save_join_cache_level;
drop table t1,t2;
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#
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# LP bug #885162 Got error 124 from storage engine with UNION inside
# subquery and join_cache_level=3..8
# (IN/ALL/ANY optimizations should not be applied to fake_select)
#
CREATE TABLE t1 (
f1 varchar(1) DEFAULT NULL
);
INSERT INTO t1 VALUES ('c');
set @save_join_cache_level=@@join_cache_level;
SET SESSION join_cache_level=8;
SELECT * FROM t1 WHERE t1.f1 IN ( SELECT 'k' UNION SELECT 'e' );
f1
set @@join_cache_level= @save_join_cache_level;
drop table t1;
#
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# LP BUG#747278 incorrect values of the NULL (no rows) single 
# row subquery requested via element_index() interface
#
CREATE TABLE t1 (f1a int, f1b int) ;
INSERT IGNORE INTO t1 VALUES (1,1),(2,2);
CREATE TABLE t2 ( f2 int);
INSERT IGNORE INTO t2 VALUES (3),(4);
CREATE TABLE t3 (f3a int default 1, f3b int default 2);
INSERT INTO t3 VALUES (1,1),(2,2);
set @old_optimizer_switch = @@session.optimizer_switch;
set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,subquery_cache=off,semijoin=off';
SELECT (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1) FROM t2;
(SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a,f3a  FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1) FROM t2;
(SELECT f3a,f3a  FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) FROM t2;
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1);
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
NULL
SELECT (SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1) FROM t2;
(SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a,f3a  FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1) FROM t2;
(SELECT f3a,f3a  FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) FROM t2;
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1);
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
NULL
set @@session.optimizer_switch=@old_optimizer_switch;
SELECT (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1) FROM t2;
(SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a,f3a  FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1) FROM t2;
(SELECT f3a,f3a  FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) FROM t2;
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1);
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
NULL
SELECT (SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1) FROM t2;
(SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a,f3a  FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1) FROM t2;
(SELECT f3a,f3a  FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) FROM t2;
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
NULL
NULL
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1);
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
NULL
select (null, null) = (null, null);
(null, null) = (null, null)
NULL
SELECT (SELECT f3a, f3a FROM t3  where f3a > 3) = (0, 0);
(SELECT f3a, f3a FROM t3  where f3a > 3) = (0, 0)
NULL
drop tables t1,t2,t3;
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#
# LP BUG#825051 Wrong result with date/datetime and subquery with GROUP BY and in_to_exists
#
CREATE TABLE t1 (a date, KEY (a)) ;
INSERT INTO t1 VALUES ('2009-01-01'),('2009-02-02');
set @old_optimizer_switch = @@optimizer_switch;
SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
2	DEPENDENT SUBQUERY	t1	index	NULL	a	4	NULL	1	Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
SET @@optimizer_switch='semijoin=off,materialization=on,in_to_exists=off,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
2	SUBQUERY	t1	index	NULL	a	4	NULL	2	Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
set @@optimizer_switch=@old_optimizer_switch;
drop table t1;
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# return optimizer switch changed in the beginning of this test
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set optimizer_switch=@subselect_tmp;
set optimizer_switch=default;
select @@optimizer_switch like '%subquery_cache=on%';
@@optimizer_switch like '%subquery_cache=on%'
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