subselect.result 188 KB
Newer Older
1
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
2
drop view if exists v2;
3 4
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
unknown's avatar
unknown committed
5 6 7
select (select 2);
(select 2)
2
unknown's avatar
unknown committed
8
explain extended select (select 2);
9 10
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
11
Warnings:
12
Note	1249	Select 2 was reduced during optimization
unknown's avatar
unknown committed
13
Note	1003	select 2 AS `(select 2)`
14 15 16 17
SELECT (SELECT 1) UNION SELECT (SELECT 2);
(SELECT 1)
1
2
unknown's avatar
unknown committed
18
explain extended SELECT (SELECT 1) UNION SELECT (SELECT 2);
19 20 21 22
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	
23
Warnings:
24 25
Note	1249	Select 2 was reduced during optimization
Note	1249	Select 4 was reduced during optimization
unknown's avatar
unknown committed
26
Note	1003	select 1 AS `(SELECT 1)` union select 2 AS `(SELECT 2)`
unknown's avatar
unknown committed
27 28 29
SELECT (SELECT (SELECT 0 UNION SELECT 0));
(SELECT (SELECT 0 UNION SELECT 0))
0
unknown's avatar
unknown committed
30
explain extended SELECT (SELECT (SELECT 0 UNION SELECT 0));
31 32 33 34 35
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	
36
Warnings:
37
Note	1249	Select 2 was reduced during optimization
38
Note	1003	select (select 0 union select 0) AS `(SELECT (SELECT 0 UNION SELECT 0))`
39
SELECT (SELECT 1 FROM (SELECT 1) as b HAVING a=1) as a;
40
ERROR 42S22: Reference 'a' not supported (forward reference in item list)
41
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;
42
ERROR 42S22: Reference 'b' not supported (forward reference in item list)
43
SELECT (SELECT 1),MAX(1) FROM (SELECT 1) as a;
44 45
(SELECT 1)	MAX(1)
1	1
unknown's avatar
unknown committed
46
SELECT (SELECT a) as a;
47
ERROR 42S22: Reference 'a' not supported (forward reference in item list)
unknown's avatar
unknown committed
48
EXPLAIN EXTENDED SELECT 1 FROM (SELECT 1 as a) as b  HAVING (SELECT a)=1;
49 50 51 52
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
53
Warnings:
54
Note	1276	Field or reference 'b.a' of SELECT #3 was resolved in SELECT #1
unknown's avatar
unknown committed
55
Note	1276	Field or reference 'b.a' of SELECT #3 was resolved in SELECT #1
Sergei Golubchik's avatar
Sergei Golubchik committed
56
Note	1003	select 1 AS `1` from dual having (<expr_cache><'1'>((select '1')) = 1)
unknown's avatar
unknown committed
57
SELECT 1 FROM (SELECT 1 as a) as b HAVING (SELECT a)=1;
58 59 60
1
1
SELECT (SELECT 1), a;
61
ERROR 42S22: Unknown column 'a' in 'field list'
62
SELECT 1 as a FROM (SELECT 1) as b HAVING (SELECT a)=1;
63 64
a
1
65
SELECT 1 FROM (SELECT (SELECT a) b) c;
66
ERROR 42S22: Unknown column 'a' in 'field list'
67
SELECT * FROM (SELECT 1 as id) b WHERE id IN (SELECT * FROM (SELECT 1 as id) c ORDER BY id);
unknown's avatar
unknown committed
68 69
id
1
70
SELECT * FROM (SELECT 1) a  WHERE 1 IN (SELECT 1,1);
unknown's avatar
unknown committed
71
ERROR 21000: Operand should contain 1 column(s)
unknown's avatar
unknown committed
72 73 74
SELECT 1 IN (SELECT 1);
1 IN (SELECT 1)
1
75
SELECT 1 FROM (SELECT 1 as a) b WHERE 1 IN (SELECT (SELECT a));
unknown's avatar
unknown committed
76 77
1
1
78
select (SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE(1));
79
ERROR HY000: Incorrect usage of PROCEDURE and subquery
80
SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE((SELECT 1));
81
ERROR HY000: Incorrect parameters to procedure 'ANALYSE'
unknown's avatar
unknown committed
82
SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NULL;
unknown's avatar
unknown committed
83
ERROR 42S22: Unknown column 'a' in 'field list'
unknown's avatar
unknown committed
84
SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NOT NULL;
unknown's avatar
unknown committed
85
ERROR 42S22: Unknown column 'a' in 'field list'
86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121
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
122 123
SELECT (SELECT 1.5,2,'a') = ROW('1.5b',2,'b');
(SELECT 1.5,2,'a') = ROW('1.5b',2,'b')
124
0
125 126
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: '1.5b'
127 128 129
SELECT (SELECT 'b',2,'a') = ROW(1.5,2,'a');
(SELECT 'b',2,'a') = ROW(1.5,2,'a')
0
130 131 132
SELECT (SELECT 1.5,2,'a') = ROW(1.5,'2','a');
(SELECT 1.5,2,'a') = ROW(1.5,'2','a')
1
133 134 135
SELECT (SELECT 1.5,'c','a') = ROW(1.5,2,'a');
(SELECT 1.5,'c','a') = ROW(1.5,2,'a')
0
unknown's avatar
unknown committed
136
SELECT (SELECT * FROM (SELECT 'test' a,'test' b) a);
unknown's avatar
unknown committed
137
ERROR 21000: Operand should contain 1 column(s)
138 139 140
SELECT 1 as a,(SELECT a+a) b,(SELECT b);
a	b	(SELECT b)
1	2	2
141 142 143
create table t1 (a int);
create table t2 (a int, b int);
create table t3 (a int);
144
create table t4 (a int not null, b int not null);
145 146 147
insert into t1 values (2);
insert into t2 values (1,7),(2,7);
insert into t4 values (4,8),(3,8),(5,9);
148
select (select a from t1 where t1.a = a1) as a2, (select b from t2 where t2.b=a2) as a1;
149
ERROR 42S22: Reference 'a1' not supported (forward reference in item list)
150 151 152 153 154 155 156 157
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
unknown's avatar
unknown committed
158 159 160 161
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
162 163 164 165 166 167 168 169
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);
unknown's avatar
unknown committed
170
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1);
171 172 173
a	b
1	7
2	7
unknown's avatar
unknown committed
174
(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;
175 176 177 178
a	b
1	7
2	7
3	8
unknown's avatar
unknown committed
179
(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);
unknown's avatar
unknown committed
180 181 182 183
a	b
1	7
2	7
4	8
184
3	8
unknown's avatar
unknown committed
185
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);
186 187 188 189 190 191
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	
unknown's avatar
unknown committed
192
Warnings:
193
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`)
unknown's avatar
unknown committed
194 195 196 197
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
198
select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
unknown's avatar
unknown committed
199 200 201
(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
202
explain extended select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
unknown's avatar
unknown committed
203
(select * from t2 where a>1) as tt;
204 205 206 207
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived3>	system	NULL	NULL	NULL	NULL	1	100.00	
3	DERIVED	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using filesort
unknown's avatar
unknown committed
208
Warnings:
209
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)`,'2' AS `a` from dual
unknown's avatar
unknown committed
210 211 212 213 214 215 216 217 218 219
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)
unknown's avatar
unknown committed
220 221 222
8	7.5000
8	4.5000
9	7.5000
unknown's avatar
unknown committed
223
explain extended select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
224 225 226 227
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
228
Warnings:
229
Note	1276	Field or reference 'test.t4.a' of SELECT #3 was resolved in SELECT #1
230
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`
unknown's avatar
unknown committed
231 232 233 234 235 236 237
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
unknown's avatar
unknown committed
238 239 240 241 242 243 244
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
unknown's avatar
unknown committed
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270
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
unknown's avatar
unknown committed
271
explain extended select * from t3 where a >= any (select b from t2);
272 273 274
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	
unknown's avatar
unknown committed
275
Warnings:
unknown's avatar
unknown committed
276
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))
unknown's avatar
unknown committed
277 278 279 280
select * from t3 where a >= all (select b from t2);
a
7
delete from t2 where a=100;
unknown's avatar
unknown committed
281
select * from t3 where a in (select a,b from t2);
unknown's avatar
unknown committed
282
ERROR 21000: Operand should contain 1 column(s)
unknown's avatar
unknown committed
283
select * from t3 where a in (select * from t2);
unknown's avatar
unknown committed
284
ERROR 21000: Operand should contain 1 column(s)
285 286
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);
unknown's avatar
unknown committed
287
b	ma
288 289 290 291 292 293
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);
unknown's avatar
unknown committed
294 295
b	ma
7	12
unknown's avatar
unknown committed
296 297 298 299 300 301 302 303 304 305 306 307 308 309 310
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
unknown's avatar
unknown committed
311
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;
312 313 314 315 316
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	
317
Warnings:
318 319
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
Sergei Golubchik's avatar
Sergei Golubchik committed
320
Note	1003	select <expr_cache><`test`.`t2`.`a`>((select '2' from dual 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`
unknown's avatar
unknown committed
321
select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
unknown's avatar
unknown committed
322
ERROR 21000: Subquery returns more than 1 row
323 324 325 326 327
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);
328 329 330 331
patient_uq	clinic_uq
1	1
1	2
2	2
unknown's avatar
unknown committed
332
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
333 334
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
unknown's avatar
unknown committed
335
2	DEPENDENT SUBQUERY	t7	eq_ref	PRIMARY	PRIMARY	4	test.t6.clinic_uq	1	100.00	Using index
336
Warnings:
337
Note	1276	Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
338
Note	1003	select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t6` where <expr_cache><`test`.`t6`.`clinic_uq`>(exists(select 1 from `test`.`t7` where (`test`.`t7`.`uq` = `test`.`t6`.`clinic_uq`)))
339
select * from t1 where a= (select a from t2,t4 where t2.b=t4.b);
340
ERROR 23000: Column 'a' in field list is ambiguous
341
drop table t1,t2,t3;
342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
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
357
CREATE TABLE `t8` (
unknown's avatar
unknown committed
358 359 360 361
`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`)
unknown's avatar
unknown committed
362
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
363 364 365
INSERT INTO t8 (pseudo,email) VALUES ('joce','test');
INSERT INTO t8 (pseudo,email) VALUES ('joce1','test1');
INSERT INTO t8 (pseudo,email) VALUES ('2joce1','2test1');
unknown's avatar
unknown committed
366
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');
367
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
368 369 370 371
1	PRIMARY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	Using index
4	SUBQUERY	t8	const	PRIMARY	PRIMARY	37		1	100.00	Using index
2	SUBQUERY	t8	const	PRIMARY	PRIMARY	37	const	1	100.00	
3	SUBQUERY	t8	const	PRIMARY	PRIMARY	37		1	100.00	Using index
unknown's avatar
unknown committed
372
Warnings:
373
Note	1003	select 'joce' AS `pseudo`,(select 'test' from `test`.`t8` where 1) AS `(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce'))` from `test`.`t8` where 1
374 375
SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo,email FROM
t8 WHERE pseudo='joce');
unknown's avatar
unknown committed
376
ERROR 21000: Operand should contain 1 column(s)
377
SELECT pseudo FROM t8 WHERE pseudo=(SELECT * FROM t8 WHERE
unknown's avatar
unknown committed
378
pseudo='joce');
unknown's avatar
unknown committed
379
ERROR 21000: Operand should contain 1 column(s)
380
SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
381 382
pseudo
joce
383
SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo LIKE '%joce%');
unknown's avatar
unknown committed
384
ERROR 21000: Subquery returns more than 1 row
385 386
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8;
CREATE TABLE `t1` (
unknown's avatar
unknown committed
387 388 389 390 391
`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`)
unknown's avatar
unknown committed
392
) ENGINE=MyISAM ROW_FORMAT=DYNAMIC;
393
INSERT INTO t1 (topic,date,pseudo) VALUES
unknown's avatar
unknown committed
394
('43506','2002-10-02','joce'),('40143','2002-08-03','joce');
unknown's avatar
unknown committed
395
EXPLAIN EXTENDED SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
396 397
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
unknown's avatar
unknown committed
398
Warnings:
399
Note	1003	select distinct `test`.`t1`.`date` AS `date` from `test`.`t1` where (`test`.`t1`.`date` = '2002-08-03')
unknown's avatar
unknown committed
400
EXPLAIN EXTENDED SELECT (SELECT DISTINCT date FROM t1 WHERE date='2002-08-03');
401 402 403
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
unknown's avatar
unknown committed
404
Warnings:
405
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')`
406
SELECT DISTINCT date FROM t1 WHERE date='2002-08-03';
unknown's avatar
unknown committed
407 408
date
2002-08-03
409 410
SELECT (SELECT DISTINCT date FROM t1 WHERE date='2002-08-03');
(SELECT DISTINCT date FROM t1 WHERE date='2002-08-03')
unknown's avatar
unknown committed
411
2002-08-03
412
SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION SELECT 1) UNION ALL SELECT 1;
unknown's avatar
unknown committed
413 414 415 416
1
1
1
1
417
SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION ALL SELECT 1) UNION SELECT 1;
unknown's avatar
unknown committed
418
ERROR 21000: Subquery returns more than 1 row
unknown's avatar
unknown committed
419
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1=(SELECT 1 UNION SELECT 1);
420 421 422 423 424
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	
unknown's avatar
unknown committed
425
Warnings:
426
Note	1003	select 1 AS `1` from `test`.`t1` where 1
unknown's avatar
unknown committed
427
drop table t1;
428
CREATE TABLE `t1` (
unknown's avatar
unknown committed
429 430 431 432
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
unknown's avatar
unknown committed
433
) ENGINE=MyISAM ROW_FORMAT=FIXED;
434 435
INSERT INTO t1 (numeropost,maxnumrep) VALUES (40143,1),(43506,2);
CREATE TABLE `t2` (
unknown's avatar
unknown committed
436 437 438 439 440
`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`)
unknown's avatar
unknown committed
441
) ENGINE=MyISAM ROW_FORMAT=DYNAMIC;
442 443
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);
unknown's avatar
unknown committed
444 445
a
40143
446
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;
unknown's avatar
unknown committed
447 448 449
numeropost	maxnumrep
43506	2
40143	1
450
SELECT (SELECT 1) as a FROM (SELECT 1 FROM t1 HAVING a=1) b;
451
ERROR 42S22: Unknown column 'a' in 'having clause'
unknown's avatar
unknown committed
452
SELECT 1 IN (SELECT 1 FROM t2 HAVING a);
453
ERROR 42S22: Unknown column 'a' in 'having clause'
454
SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic);
unknown's avatar
unknown committed
455 456
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
457 458
joce	43506	2002-10-22	joce
SELECT * from t2 where topic IN (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
unknown's avatar
unknown committed
459 460 461
mot	topic	date	pseudo
SELECT * from t2 where topic IN (SELECT SUM(topic) FROM t1);
mot	topic	date	pseudo
462
SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic);
unknown's avatar
unknown committed
463 464
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
465 466
joce	43506	2002-10-22	joce
SELECT * from t2 where topic = any (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
unknown's avatar
unknown committed
467 468 469
mot	topic	date	pseudo
SELECT * from t2 where topic = any (SELECT SUM(topic) FROM t1);
mot	topic	date	pseudo
470
SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic);
unknown's avatar
unknown committed
471
mot	topic	date	pseudo
472
SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100);
unknown's avatar
unknown committed
473 474
mot	topic	date	pseudo
joce	40143	2002-10-22	joce
475
joce	43506	2002-10-22	joce
476 477 478 479
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
unknown's avatar
unknown committed
480 481 482 483 484 485
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
486 487 488 489 490 491 492 493 494 495 496 497 498
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
unknown's avatar
unknown committed
499
drop table t1,t2;
500
CREATE TABLE `t1` (
unknown's avatar
unknown committed
501 502 503 504
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY  (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
unknown's avatar
unknown committed
505
) ENGINE=MyISAM ROW_FORMAT=FIXED;
506 507
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);
unknown's avatar
unknown committed
508
ERROR 21000: Subquery returns more than 1 row
509
select numeropost as a FROM t1 ORDER BY (SELECT 1 FROM t1 HAVING a=1);
unknown's avatar
unknown committed
510
ERROR 21000: Subquery returns more than 1 row
511
drop table t1;
512 513 514 515 516 517 518 519
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;
520 521
CREATE TABLE t1 (field char(1) NOT NULL DEFAULT 'b');
INSERT INTO t1 VALUES ();
522
SELECT field FROM t1 WHERE 1=(SELECT 1 UNION ALL SELECT 1 FROM (SELECT 1) a HAVING field='b');
unknown's avatar
unknown committed
523
ERROR 21000: Subquery returns more than 1 row
524 525
drop table t1;
CREATE TABLE `t1` (
unknown's avatar
unknown committed
526 527 528 529 530 531
`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`)
unknown's avatar
unknown committed
532
) ENGINE=MyISAM;
533
SELECT (SELECT numeropost FROM t1 HAVING numreponse=a),numreponse FROM (SELECT * FROM t1) as a;
534
ERROR 42S22: Reference 'numreponse' not supported (forward reference in item list)
535
SELECT numreponse, (SELECT numeropost FROM t1 HAVING numreponse=a) FROM (SELECT * FROM t1) as a;
536
ERROR 42S22: Unknown column 'a' in 'having clause'
537 538 539
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');
unknown's avatar
unknown committed
540
EXPLAIN EXTENDED SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT 1 FROM t1 WHERE numeropost='1');
unknown's avatar
unknown committed
541
ERROR 21000: Subquery returns more than 1 row
unknown's avatar
unknown committed
542
EXPLAIN EXTENDED SELECT MAX(numreponse) FROM t1 WHERE numeropost='1';
543 544
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
unknown's avatar
unknown committed
545
Warnings:
546
Note	1003	select max(`test`.`t1`.`numreponse`) AS `MAX(numreponse)` from `test`.`t1` where (`test`.`t1`.`numeropost` = '1')
unknown's avatar
unknown committed
547
EXPLAIN EXTENDED SELECT numreponse FROM t1 WHERE numeropost='1' AND numreponse=(SELECT MAX(numreponse) FROM t1 WHERE numeropost='1');
548 549 550
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 index
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
unknown's avatar
unknown committed
551
Warnings:
552
Note	1003	select '3' AS `numreponse` from `test`.`t1` where (('1' = '1'))
553
drop table t1;
554 555
CREATE TABLE t1 (a int(1));
INSERT INTO t1 VALUES (1);
unknown's avatar
unknown committed
556
SELECT 1 FROM (SELECT a FROM t1) b HAVING (SELECT b.a)=1;
557 558 559
1
1
drop table t1;
560 561 562 563 564 565 566 567 568
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
569
update t1 set b= (select b from t1);
570
ERROR HY000: You can't specify target table 't1' for update in FROM clause
unknown's avatar
unknown committed
571
update t1 set b= (select b from t2);
unknown's avatar
unknown committed
572
ERROR 21000: Subquery returns more than 1 row
573 574 575 576 577 578 579
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;
unknown's avatar
unknown committed
580 581 582 583 584 585 586 587 588 589 590 591
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
592
delete from t1 where b = (select b from t1);
593
ERROR HY000: You can't specify target table 't1' for update in FROM clause
unknown's avatar
unknown committed
594
delete from t1 where b = (select b from t2);
unknown's avatar
unknown committed
595
ERROR 21000: Subquery returns more than 1 row
unknown's avatar
unknown committed
596 597 598 599 600 601
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;
602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617
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
618
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t12 where t11.a = t12.a);
619
ERROR HY000: You can't specify target table 't12' for update in FROM clause
unknown's avatar
unknown committed
620
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2);
unknown's avatar
unknown committed
621
ERROR 21000: Subquery returns more than 1 row
622 623 624 625 626 627 628 629 630 631
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;
632 633
CREATE TABLE t1 (x int) ENGINE=MyISAM;
create table t2 (a int) ENGINE=MyISAM;
634
create table t3 (b int);
635
insert into t2 values (1);
unknown's avatar
unknown committed
636
insert into t3 values (1),(2);
637
INSERT INTO t1 (x) VALUES ((SELECT x FROM t1));
638
ERROR HY000: You can't specify target table 't1' for update in FROM clause
639
INSERT INTO t1 (x) VALUES ((SELECT b FROM t3));
unknown's avatar
unknown committed
640
ERROR 21000: Subquery returns more than 1 row
641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658
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;
659 660 661 662 663 664 665 666
select * from t1;
x
1
2
3
3
11
11
unknown's avatar
unknown committed
667 668
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
ERROR 42S22: Unknown column 'x' in 'field list'
669
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
670 671 672 673 674 675
select * from t1;
x
1
2
3
3
unknown's avatar
unknown committed
676 677
11
11
678
2
unknown's avatar
unknown committed
679
drop table t1, t2, t3;
680
CREATE TABLE t1 (x int not null, y int, primary key (x)) ENGINE=MyISAM;
681
create table t2 (a int);
unknown's avatar
unknown committed
682
create table t3 (a int);
683
insert into t2 values (1);
unknown's avatar
unknown committed
684
insert into t3 values (1),(2);
685 686
select * from t1;
x	y
687
replace into t1 (x, y) VALUES ((SELECT x FROM t1), (SELECT a+1 FROM t2));
688
ERROR HY000: You can't specify target table 't1' for update in FROM clause
unknown's avatar
unknown committed
689
replace into t1 (x, y) VALUES ((SELECT a FROM t3), (SELECT a+1 FROM t2));
unknown's avatar
unknown committed
690
ERROR 21000: Subquery returns more than 1 row
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714
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
unknown's avatar
unknown committed
715
drop table t1, t2, t3;
716
SELECT * FROM (SELECT 1) b WHERE 1 IN (SELECT *);
717
ERROR HY000: No tables used
unknown's avatar
unknown committed
718
CREATE TABLE t2 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
unknown's avatar
unknown committed
719 720
INSERT INTO t2 VALUES (1),(2);
SELECT * FROM t2 WHERE id IN (SELECT 1);
unknown's avatar
unknown committed
721 722
id
1
unknown's avatar
unknown committed
723
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1);
724
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
725
1	PRIMARY	t2	ref	id	id	5	const	1	100.00	Using index
unknown's avatar
unknown committed
726
Warnings:
727
Note	1249	Select 2 was reduced during optimization
728
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where (`test`.`t2`.`id` = 1)
unknown's avatar
unknown committed
729
SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
unknown's avatar
unknown committed
730 731
id
1
unknown's avatar
unknown committed
732
SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
unknown's avatar
unknown committed
733 734
id
2
unknown's avatar
unknown committed
735
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
736
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
737
1	PRIMARY	t2	ref	id	id	5	const	1	100.00	Using where; Using index
unknown's avatar
unknown committed
738
Warnings:
739 740
Note	1249	Select 3 was reduced during optimization
Note	1249	Select 2 was reduced during optimization
741
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where (`test`.`t2`.`id` = <cache>((1 + 1)))
unknown's avatar
unknown committed
742
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
743 744 745 746 747
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	
unknown's avatar
unknown committed
748
Warnings:
749
Note	1003	select `test`.`t2`.`id` AS `id` from `test`.`t2` where <expr_cache><`test`.`t2`.`id`>(<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)))))
unknown's avatar
unknown committed
750
SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 3);
unknown's avatar
unknown committed
751
id
unknown's avatar
unknown committed
752
SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 2);
unknown's avatar
unknown committed
753 754
id
2
unknown's avatar
unknown committed
755
INSERT INTO t2 VALUES ((SELECT * FROM t2));
756
ERROR HY000: You can't specify target table 't2' for update in FROM clause
757
INSERT INTO t2 VALUES ((SELECT id FROM t2));
758
ERROR HY000: You can't specify target table 't2' for update in FROM clause
unknown's avatar
unknown committed
759
SELECT * FROM t2;
760 761 762
id
1
2
unknown's avatar
unknown committed
763
CREATE TABLE t1 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
unknown's avatar
unknown committed
764
INSERT INTO t1 values (1),(1);
unknown's avatar
unknown committed
765
UPDATE t2 SET id=(SELECT * FROM t1);
unknown's avatar
unknown committed
766
ERROR 21000: Subquery returns more than 1 row
unknown's avatar
unknown committed
767 768 769 770 771 772 773 774
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)
775
0
unknown's avatar
unknown committed
776 777
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
778
NULL
unknown's avatar
unknown committed
779 780 781
update t1 set a=NULL where a=2;
select 1 IN (SELECT * from t1);
1 IN (SELECT * from t1)
782
1
unknown's avatar
unknown committed
783 784
select 3 IN (SELECT * from t1);
3 IN (SELECT * from t1)
785
1
unknown's avatar
unknown committed
786 787
select 10 IN (SELECT * from t1);
10 IN (SELECT * from t1)
788
NULL
unknown's avatar
unknown committed
789 790
select 1 > ALL (SELECT * from t1);
1 > ALL (SELECT * from t1)
791
0
unknown's avatar
unknown committed
792 793
select 10 > ALL (SELECT * from t1);
10 > ALL (SELECT * from t1)
794
NULL
unknown's avatar
unknown committed
795 796
select 1 > ANY (SELECT * from t1);
1 > ANY (SELECT * from t1)
797
NULL
unknown's avatar
unknown committed
798 799
select 10 > ANY (SELECT * from t1);
10 > ANY (SELECT * from t1)
800
1
unknown's avatar
unknown committed
801 802 803 804 805
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)
806
1
unknown's avatar
unknown committed
807 808
select 'XYZS' IN (SELECT * from t1);
'XYZS' IN (SELECT * from t1)
809
0
unknown's avatar
unknown committed
810 811
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
812
NULL
unknown's avatar
unknown committed
813 814 815
update t1 set a=NULL where a='BC';
select 'A' IN (SELECT * from t1);
'A' IN (SELECT * from t1)
816
1
unknown's avatar
unknown committed
817 818
select 'DEF' IN (SELECT * from t1);
'DEF' IN (SELECT * from t1)
819
1
unknown's avatar
unknown committed
820 821
select 'XYZS' IN (SELECT * from t1);
'XYZS' IN (SELECT * from t1)
822
NULL
unknown's avatar
unknown committed
823 824
select 'A' > ALL (SELECT * from t1);
'A' > ALL (SELECT * from t1)
825
0
unknown's avatar
unknown committed
826 827
select 'XYZS' > ALL (SELECT * from t1);
'XYZS' > ALL (SELECT * from t1)
828
NULL
unknown's avatar
unknown committed
829 830
select 'A' > ANY (SELECT * from t1);
'A' > ANY (SELECT * from t1)
831
NULL
unknown's avatar
unknown committed
832 833
select 'XYZS' > ANY (SELECT * from t1);
'XYZS' > ANY (SELECT * from t1)
834
1
unknown's avatar
unknown committed
835 836 837 838 839
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)
840
1
unknown's avatar
unknown committed
841 842
select 10.5 IN (SELECT * from t1);
10.5 IN (SELECT * from t1)
843
0
unknown's avatar
unknown committed
844 845
select NULL IN (SELECT * from t1);
NULL IN (SELECT * from t1)
846
NULL
unknown's avatar
unknown committed
847 848 849
update t1 set a=NULL where a=2.5;
select 1.5 IN (SELECT * from t1);
1.5 IN (SELECT * from t1)
850
1
unknown's avatar
unknown committed
851 852
select 3.5 IN (SELECT * from t1);
3.5 IN (SELECT * from t1)
853
1
unknown's avatar
unknown committed
854 855
select 10.5 IN (SELECT * from t1);
10.5 IN (SELECT * from t1)
856
NULL
unknown's avatar
unknown committed
857 858
select 1.5 > ALL (SELECT * from t1);
1.5 > ALL (SELECT * from t1)
859
0
unknown's avatar
unknown committed
860 861
select 10.5 > ALL (SELECT * from t1);
10.5 > ALL (SELECT * from t1)
862
NULL
unknown's avatar
unknown committed
863 864
select 1.5 > ANY (SELECT * from t1);
1.5 > ANY (SELECT * from t1)
865
NULL
unknown's avatar
unknown committed
866 867
select 10.5 > ANY (SELECT * from t1);
10.5 > ANY (SELECT * from t1)
868
1
unknown's avatar
unknown committed
869
explain extended select (select a+1) from t1;
870 871
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	
872
Warnings:
873
Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
874
Note	1249	Select 2 was reduced during optimization
875
Note	1003	select (`test`.`t1`.`a` + 1) AS `(select a+1)` from `test`.`t1`
unknown's avatar
unknown committed
876
select (select a+1) from t1;
877 878 879 880
(select a+1)
2.5
NULL
4.5
unknown's avatar
unknown committed
881 882 883 884 885 886 887 888 889 890 891
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
unknown's avatar
unknown committed
892
explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
893 894 895
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
unknown's avatar
unknown committed
896
Warnings:
897
Note	1003	select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`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`
898 899 900 901 902 903 904 905
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
unknown's avatar
unknown committed
906
explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
907 908
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
909
2	DEPENDENT SUBQUERY	t2	ref_or_null	a	a	5	func	2	100.00	Using index
unknown's avatar
unknown committed
910
2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer
unknown's avatar
unknown committed
911
Warnings:
912
Note	1003	select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 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`
913
drop table t1,t2,t3;
unknown's avatar
unknown committed
914 915
create table t1 (a float);
select 10.5 IN (SELECT * from t1 LIMIT 1);
916
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
unknown's avatar
unknown committed
917
select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
918
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
unknown's avatar
unknown committed
919
drop table t1;
920 921 922 923 924 925 926 927
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
928
NULL	NULL	NULL
929 930 931 932 933 934 935 936 937
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
938
NULL	NULL	NULL
939
drop table t1,t2;
940 941 942 943 944 945 946
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)
unknown's avatar
unknown committed
947
0
948 949
select ROW(1, 1, 'a') IN (select b,a,c from t1);
ROW(1, 1, 'a') IN (select b,a,c from t1)
unknown's avatar
unknown committed
950
1
951 952
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)
unknown's avatar
unknown committed
953
1
954 955
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)
unknown's avatar
unknown committed
956
0
957 958
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)
unknown's avatar
unknown committed
959
1
960 961
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')
unknown's avatar
unknown committed
962
1
963 964
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')
unknown's avatar
unknown committed
965
0
966 967
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')
unknown's avatar
unknown committed
968
1
969
select ROW(1, 1, 'a') IN (select b,a,c from t1 limit 2);
970
ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
971 972 973 974
drop table t1;
create table t1 (a int);
insert into t1 values (1);
do @a:=(SELECT a from t1);
unknown's avatar
unknown committed
975 976 977
select @a;
@a
1
unknown's avatar
unknown committed
978
set @a:=2;
unknown's avatar
merge  
unknown committed
979
set @a:=(SELECT a from t1);
unknown's avatar
unknown committed
980 981 982
select @a;
@a
1
983 984
drop table t1;
do (SELECT a from t1);
985
ERROR 42S02: Table 'test.t1' doesn't exist
unknown's avatar
unknown committed
986
set @a:=(SELECT a from t1);
987
ERROR 42S02: Table 'test.t1' doesn't exist
988 989 990
CREATE TABLE t1 (a int, KEY(a));
HANDLER t1 OPEN;
HANDLER t1 READ a=((SELECT 1));
991
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
992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
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;
unknown's avatar
unknown committed
1011
CREATE TABLE `t1` (`i` int(11) NOT NULL default '0',PRIMARY KEY  (`i`)) ENGINE=MyISAM CHARSET=latin1;
1012 1013
INSERT INTO t1 VALUES (1);
UPDATE t1 SET i=i+1 WHERE i=(SELECT MAX(i));
1014 1015
select * from t1;
i
1016
2
1017
drop table t1;
unknown's avatar
unknown committed
1018
CREATE TABLE t1 (a int(1));
unknown's avatar
unknown committed
1019
EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
1020 1021 1022
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
unknown's avatar
unknown committed
1023
Warnings:
1024
Note	1003	select (select rand() from `test`.`t1`) AS `(SELECT RAND() FROM t1)` from `test`.`t1`
unknown's avatar
unknown committed
1025
EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
1026 1027 1028
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
unknown's avatar
unknown committed
1029
Warnings:
1030
Note	1003	select (select encrypt('test') from `test`.`t1`) AS `(SELECT ENCRYPT('test') FROM t1)` from `test`.`t1`
unknown's avatar
unknown committed
1031
EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
1032 1033 1034
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
unknown's avatar
unknown committed
1035
Warnings:
1036
Note	1003	select (select benchmark(1,1) from `test`.`t1`) AS `(SELECT BENCHMARK(1,1) FROM t1)` from `test`.`t1`
unknown's avatar
unknown committed
1037
drop table t1;
1038 1039 1040 1041 1042 1043 1044 1045
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`)
unknown's avatar
unknown committed
1046
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
1047 1048 1049 1050 1051 1052 1053 1054
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`)
unknown's avatar
unknown committed
1055
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
1056 1057 1058 1059 1060
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`)
unknown's avatar
unknown committed
1061
) ENGINE=MyISAM CHARSET=latin1;
1062
INSERT INTO t1 VALUES ('joce','1','','joce'),('test','2','','test');
unknown's avatar
unknown committed
1063
Warnings:
unknown's avatar
unknown committed
1064 1065
Warning	1265	Data truncated for column 'date' at row 1
Warning	1265	Data truncated for column 'date' at row 2
1066
INSERT INTO t2 VALUES ('joce','1','','joce'),('test','2','','test');
unknown's avatar
unknown committed
1067
Warnings:
unknown's avatar
unknown committed
1068 1069
Warning	1265	Data truncated for column 'date' at row 1
Warning	1265	Data truncated for column 'date' at row 2
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
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;
1085 1086 1087 1088 1089 1090 1091
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` (
1092 1093
  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT 1)` int(1) NOT NULL DEFAULT '0'
unknown's avatar
unknown committed
1094
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1095 1096 1097 1098 1099
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` (
1100 1101
  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT a)` int(1) NOT NULL DEFAULT '0'
unknown's avatar
unknown committed
1102
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1103 1104 1105 1106 1107
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` (
1108 1109
  `a` int(1) NOT NULL DEFAULT '0',
  `(SELECT a+0)` int(3) NOT NULL DEFAULT '0'
unknown's avatar
unknown committed
1110
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1111 1112
drop table t1;
CREATE TABLE t1 SELECT (SELECT 1 as a UNION SELECT 1+1 limit 1,1) as a;
1113 1114 1115
select * from t1;
a
2
1116 1117 1118
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
1119
  `a` bigint(20) NOT NULL DEFAULT '0'
unknown's avatar
unknown committed
1120
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1121
drop table t1;
1122 1123
create table t1 (a int);
insert into t1 values (1), (2), (3);
unknown's avatar
unknown committed
1124
explain extended select a,(select (select rand() from t1 limit 1)  from t1 limit 1)
1125
from t1;
1126 1127 1128 1129
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	
unknown's avatar
unknown committed
1130
Warnings:
1131
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`
1132
drop table t1;
1133
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);
1134
ERROR 42S02: Table 'test.t1' doesn't exist
unknown's avatar
unknown committed
1135 1136 1137 1138 1139 1140 1141
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)
unknown's avatar
unknown committed
1142
) ENGINE=MyISAM;
unknown's avatar
unknown committed
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162
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)
unknown's avatar
unknown committed
1163
) ENGINE=MyISAM;
unknown's avatar
unknown committed
1164
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');
1165
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');
unknown's avatar
unknown committed
1166 1167 1168 1169
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;
1170 1171 1172 1173
CREATE TABLE `t1` (
`id` mediumint(8) unsigned NOT NULL auto_increment,
`pseudo` varchar(35) character set latin1 NOT NULL default '',
PRIMARY KEY  (`id`),
unknown's avatar
unknown committed
1174
UNIQUE KEY `pseudo` (`pseudo`)
unknown's avatar
unknown committed
1175
) ENGINE=MyISAM PACK_KEYS=1 ROW_FORMAT=DYNAMIC;
1176 1177 1178 1179
INSERT INTO t1 (pseudo) VALUES ('test');
SELECT 0 IN (SELECT 1 FROM t1 a);
0 IN (SELECT 1 FROM t1 a)
0
unknown's avatar
unknown committed
1180
EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a);
1181 1182 1183
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
unknown's avatar
unknown committed
1184
Warnings:
1185
Note	1003	select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)`
1186 1187 1188 1189
INSERT INTO t1 (pseudo) VALUES ('test1');
SELECT 0 IN (SELECT 1 FROM t1 a);
0 IN (SELECT 1 FROM t1 a)
0
unknown's avatar
unknown committed
1190
EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a);
1191 1192 1193
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
unknown's avatar
unknown committed
1194
Warnings:
1195
Note	1003	select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)`
1196
drop table t1;
1197 1198 1199
CREATE TABLE `t1` (
`i` int(11) NOT NULL default '0',
PRIMARY KEY  (`i`)
unknown's avatar
unknown committed
1200
) ENGINE=MyISAM CHARSET=latin1;
1201 1202 1203
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));
1204
UPDATE t1 SET t.i=i+(SELECT MAX(i) FROM (SELECT 1) t);
unknown's avatar
unknown committed
1205
ERROR 42S22: Unknown column 't.i' in 'field list'
1206 1207
select * from t1;
i
1208
3
1209
drop table t1;
unknown's avatar
unknown committed
1210 1211
CREATE TABLE t1 (
id int(11) default NULL
unknown's avatar
unknown committed
1212
) ENGINE=MyISAM CHARSET=latin1;
unknown's avatar
unknown committed
1213 1214 1215 1216
INSERT INTO t1 VALUES (1),(1),(2),(2),(1),(3);
CREATE TABLE t2 (
id int(11) default NULL,
name varchar(15) default NULL
unknown's avatar
unknown committed
1217
) ENGINE=MyISAM CHARSET=latin1;
unknown's avatar
unknown committed
1218 1219 1220 1221 1222 1223 1224 1225 1226
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;
1227 1228 1229 1230 1231 1232
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;
unknown's avatar
unknown committed
1233 1234
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);
unknown's avatar
unknown committed
1235
explain extended SELECT id FROM t1 where salary = (SELECT MAX(salary) FROM t1);
1236
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1237
1	PRIMARY	t1	ref	salary	salary	5	const	1	100.00	Using index condition
1238
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
unknown's avatar
unknown committed
1239
Warnings:
1240
Note	1003	select `test`.`t1`.`id` AS `id` from `test`.`t1` where (`test`.`t1`.`salary` = (select max(`test`.`t1`.`salary`) from `test`.`t1`))
unknown's avatar
unknown committed
1241
drop table t1;
1242 1243 1244 1245 1246 1247 1248 1249 1250
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)
unknown's avatar
unknown committed
1251
) ENGINE=MyISAM CHARSET=cp1251;
1252 1253 1254 1255
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;
1256 1257 1258 1259 1260 1261
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:
unknown's avatar
unknown committed
1262
Error	1242	Subquery returns more than 1 row
1263 1264 1265 1266 1267 1268
select * from t1;
a	b
1	1
2	NULL
3	1
drop table t1, t2;
1269 1270 1271 1272 1273 1274
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`),
unknown's avatar
unknown committed
1275
UNIQUE KEY `pseudo` (`pseudo`)
unknown's avatar
unknown committed
1276
) ENGINE=MyISAM CHARSET=latin1 PACK_KEYS=1 ROW_FORMAT=DYNAMIC;
1277 1278 1279 1280 1281 1282
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;
unknown's avatar
unknown committed
1283 1284 1285
(SELECT 1 as a) UNION (SELECT 1) ORDER BY (SELECT a+0);
a
1
1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296
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
unknown's avatar
unknown committed
1297
explain extended select * from t2 where t2.a in (select a from t1);
1298
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1299 1300
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
unknown's avatar
unknown committed
1301
Warnings:
1302
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)
1303 1304 1305 1306
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
4
unknown's avatar
unknown committed
1307
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
1308
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1309 1310
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
unknown's avatar
unknown committed
1311
Warnings:
1312
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))
1313 1314 1315 1316
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
a
2
3
unknown's avatar
unknown committed
1317
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
1318
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1319 1320 1321
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
1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	100.00	Using index
unknown's avatar
unknown committed
1322
Warnings:
1323
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`))
1324
drop table t1, t2, t3;
1325
create table t1 (a int, b int, index a (a,b));
1326 1327 1328
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);
1329 1330 1331 1332
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;
1333 1334 1335 1336 1337 1338 1339
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
unknown's avatar
unknown committed
1340
explain extended select * from t2 where t2.a in (select a from t1);
1341
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1342 1343
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
1	PRIMARY	t1	ref	a	a	5	test.t2.a	101	100.00	Using index; FirstMatch(t2)
unknown's avatar
unknown committed
1344
Warnings:
1345
Note	1003	select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `test`.`t2`.`a`)
1346 1347 1348 1349
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a
2
4
unknown's avatar
unknown committed
1350
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
1351
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1352 1353
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
1	PRIMARY	t1	ref	a	a	5	test.t2.a	101	100.00	Using where; Using index; FirstMatch(t2)
unknown's avatar
unknown committed
1354
Warnings:
1355
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))
1356 1357 1358 1359
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
a
2
3
unknown's avatar
unknown committed
1360
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
1361
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1362 1363 1364
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
1	PRIMARY	t3	index	a	a	5	NULL	3	100.00	Using index
1	PRIMARY	t1	ref	a	a	10	test.t2.a,test.t3.a	116	100.61	Using index; FirstMatch(t2)
unknown's avatar
unknown committed
1365
Warnings:
1366
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`))
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376
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
unknown's avatar
unknown committed
1377
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
1378
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1379 1380
1	PRIMARY	t2	index	a	a	5	NULL	4	100.00	Using index
1	PRIMARY	t1	ref	a	a	5	test.t2.a	101	100.00	Using where; Using index; FirstMatch(t2)
unknown's avatar
unknown committed
1381
Warnings:
1382
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))
1383
drop table t0, t1, t2, t3;
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
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;
1396 1397 1398 1399 1400 1401
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
1402
1
1403
drop table t1,t2;
unknown's avatar
merge  
unknown committed
1404 1405 1406 1407
create table t1 (s1 int);
create table t2 (s1 int);
insert into t1 values (1);
insert into t2 values (1);
1408
update t1 set  s1 = s1 + 1 where 1 = (select x.s1 as A from t2 WHERE t2.s1 > t1.s1 order by A);
1409
ERROR 42S22: Unknown column 'x.s1' in 'field list'
1410
DROP TABLE t1, t2;
1411 1412 1413 1414 1415 1416
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);
unknown's avatar
merge  
unknown committed
1417
ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '>'
1418
drop table t1;
1419 1420 1421 1422 1423 1424 1425 1426 1427
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;
unknown's avatar
unknown committed
1428 1429
create table t1 (s1 char(5));
select (select 'a','b' from t1 union select 'a','b' from t1) from t1;
unknown's avatar
unknown committed
1430
ERROR 21000: Operand should contain 1 column(s)
unknown's avatar
unknown committed
1431 1432 1433 1434
insert into t1 values ('tttt');
select * from t1 where ('a','b')=(select 'a','b' from t1 union select 'a','b' from t1);
s1
tttt
unknown's avatar
unknown committed
1435
explain extended (select * from t1);
1436 1437
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	
unknown's avatar
unknown committed
1438
Warnings:
1439
Note	1003	(select 'tttt' AS `s1` from dual)
unknown's avatar
unknown committed
1440 1441 1442
(select * from t1);
s1
tttt
unknown's avatar
unknown committed
1443
drop table t1;
1444
create table t1 (s1 char(5), index s1(s1));
1445 1446 1447 1448 1449 1450 1451 1452
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
unknown's avatar
unknown committed
1453 1454 1455 1456 1457 1458 1459 1460 1461 1462
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
1463 1464 1465 1466 1467
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
unknown's avatar
unknown committed
1468
explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
1469 1470
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
1471
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
1472
Warnings:
1473
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<expr_cache><`test`.`t1`.`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 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
1474
explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
1475 1476
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
1477
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
1478
Warnings:
1479
Note	1003	select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`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`
1480
explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
1481 1482
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
1483
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
unknown's avatar
unknown committed
1484
Warnings:
1485
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<expr_cache><`test`.`t1`.`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 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
unknown's avatar
unknown committed
1486
explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
1487 1488
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
1489
2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
unknown's avatar
unknown committed
1490
Warnings:
1491
Note	1003	select `test`.`t1`.`s1` AS `s1`,(not(<expr_cache><`test`.`t1`.`s1`>(<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`
1492
drop table t1,t2;
1493 1494 1495 1496 1497 1498 1499 1500
create table t2 (a int, b int);
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
unknown's avatar
unknown committed
1501
explain extended select * from t3 where a >= all (select b from t2);
1502 1503 1504
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
unknown's avatar
unknown committed
1505
Warnings:
1506
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`)))
1507 1508 1509
select * from t3 where a >= some (select b from t2);
a
explain extended select * from t3 where a >= some (select b from t2);
1510 1511 1512
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
1513
Warnings:
1514
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`)))
1515 1516 1517 1518 1519 1520
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);
1521 1522 1523
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
1524
Warnings:
1525
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1)))
1526 1527 1528
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);
1529 1530 1531
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
1532
Warnings:
1533
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1)))
1534 1535 1536
select * from t3 where NULL >= any (select b from t2);
a
explain extended select * from t3 where NULL >= any (select b from t2);
1537 1538 1539
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
1540
Warnings:
1541
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
1542 1543 1544
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);
1545 1546 1547
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
1548
Warnings:
1549
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
1550 1551 1552
select * from t3 where NULL >= some (select b from t2);
a
explain extended select * from t3 where NULL >= some (select b from t2);
1553 1554 1555
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
1556
Warnings:
1557
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
1558 1559 1560
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);
1561 1562 1563
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
2	SUBQUERY	t2	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
1564
Warnings:
1565
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
1566 1567 1568 1569 1570
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
unknown's avatar
unknown committed
1571
explain extended select * from t3 where a > all (select max(b) from t2 group by a);
1572 1573 1574
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; Using filesort
unknown's avatar
unknown committed
1575
Warnings:
1576
Note	1003	select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`)))
1577
drop table t2, t3;
unknown's avatar
unknown committed
1578
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 ;
1579
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());
unknown's avatar
unknown committed
1580
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;
1581
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);
unknown's avatar
unknown committed
1582
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 ;
1583
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);
unknown's avatar
unknown committed
1584
CREATE TABLE `t4` (`task_id` smallint(6) NOT NULL default '0',`description` varchar(200) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
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;
unknown's avatar
unknown committed
1596
CREATE TABLE t1 (id int(11) default NULL) ENGINE=MyISAM CHARSET=latin1;
1597
INSERT INTO t1 VALUES (1),(5);
unknown's avatar
unknown committed
1598
CREATE TABLE t2 (id int(11) default NULL) ENGINE=MyISAM CHARSET=latin1;
1599 1600 1601 1602
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;
1603 1604 1605 1606 1607 1608
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);
1609 1610
Warnings:
Error	1242	Subquery returns more than 1 row
1611
drop table t1;
1612 1613 1614 1615 1616 1617 1618 1619
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
1620
explain extended select * from t1 where 'f' > any (select s1 from t1 union select s1 from t1);
1621 1622 1623 1624 1625
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	
1626
Warnings:
1627
Note	1003	select 'e' AS `s1` from dual where 1
1628
drop table t1;
unknown's avatar
unknown committed
1629
CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
1630
INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874');
unknown's avatar
unknown committed
1631
CREATE TABLE t2 (code char(5) NOT NULL default '',UNIQUE KEY code (code)) ENGINE=MyISAM CHARSET=latin1;
1632 1633 1634 1635 1636 1637 1638 1639
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;
1640 1641 1642 1643 1644 1645 1646
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;
unknown's avatar
unknown committed
1647
ERROR 42S22: Unknown column 't1.s2' in 'group statement'
1648
drop table t1, t2;
unknown's avatar
unknown committed
1649 1650 1651 1652 1653 1654 1655
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;
unknown's avatar
unknown committed
1656 1657 1658 1659 1660 1661 1662 1663 1664 1665
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;
1666 1667
create table t1 (a int, b decimal(13, 3));
insert into t1 values (1, 0.123);
Sven Sandberg's avatar
Sven Sandberg committed
1668
select a, (select max(b) from t1) into outfile "../../tmp/subselect.out.file.1" from t1;
1669
delete from t1;
Sven Sandberg's avatar
Sven Sandberg committed
1670
load data infile "../../tmp/subselect.out.file.1" into table t1;
1671 1672 1673 1674
select * from t1;
a	b
1	0.123
drop table t1;
unknown's avatar
unknown committed
1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
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`)
1686
);
unknown's avatar
unknown committed
1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698
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
unknown's avatar
unknown committed
1699
DROP TABLE t1, t2;
1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
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;
1711 1712 1713 1714 1715 1716 1717 1718
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;
1719 1720 1721 1722 1723
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
unknown's avatar
unknown committed
1724
drop table t1;
1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741
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);
1742 1743 1744
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
1745
Warnings:
1746
Note	1003	select `test`.`t1`.`id` AS `id`,`test`.`t1`.`text` AS `text` from `test`.`t1` where (not(<expr_cache><`test`.`t1`.`id`>(<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`))))))))
1747
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);
1748 1749
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
unknown's avatar
unknown committed
1750
2	DEPENDENT SUBQUERY	t1	eq_ref	PRIMARY	PRIMARY	4	test.tt.id	1	100.00	Using where; Using index
1751
Warnings:
1752
Note	1276	Field or reference 'test.tt.id' of SELECT #2 was resolved in SELECT #1
1753
Note	1003	select `test`.`tt`.`id` AS `id`,`test`.`tt`.`text` AS `text` from `test`.`t1` `tt` where (not(<expr_cache><`test`.`tt`.`id`>(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)))))
1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773
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);
1774 1775 1776
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	
1777
1	SIMPLE	c	eq_ref	PRIMARY	PRIMARY	4	func	1	100.00	Using index condition
1778
Warnings:
unknown's avatar
unknown committed
1779
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`)
1780
drop table t1,t2;
unknown's avatar
merge  
unknown committed
1781
create table t1 (a int);
1782 1783 1784 1785 1786 1787
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;
unknown's avatar
unknown committed
1788 1789 1790 1791
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;
1792
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
1793
drop table t1,t2,t3;
1794 1795 1796 1797
CREATE TABLE t1 (id INT);
CREATE TABLE t2 (id INT);
INSERT INTO t1 VALUES (1), (2);
INSERT INTO t2 VALUES (1);
1798 1799 1800 1801
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
unknown's avatar
unknown committed
1802
SELECT id, ( SELECT COUNT(t.id) FROM t2 AS t WHERE t.id = t1.id ) AS c FROM t1 LEFT JOIN t2 USING (id);
1803 1804 1805
id	c
1	1
2	0
1806 1807 1808 1809
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
unknown's avatar
unknown committed
1810
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;
1811 1812 1813
id	c
1	1
2	0
1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901
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
unknown's avatar
unknown committed
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275
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
2276
DROP TABLE t1;
unknown's avatar
unknown committed
2277 2278 2279 2280 2281 2282 2283
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);
2284 2285 2286
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
unknown's avatar
unknown committed
2287
Warnings:
2288
Note	1276	Field or reference 'test.up.a' of SELECT #2 was resolved in SELECT #1
2289
Note	1003	select `test`.`up`.`a` AS `a`,`test`.`up`.`b` AS `b` from `test`.`t1` `up` where <expr_cache><`test`.`up`.`a`>(exists(select 1 from `test`.`t1` where (`test`.`t1`.`a` = `test`.`up`.`a`)))
unknown's avatar
unknown committed
2290
drop table t1;
2291 2292 2293 2294 2295 2296 2297 2298 2299
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;
2300 2301 2302 2303 2304 2305 2306 2307 2308 2309
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;
2310 2311 2312
CREATE TABLE t1 ( a int, b int );
CREATE TABLE t2 ( c int, d int );
INSERT INTO t1 VALUES (1,2), (2,3), (3,4);
2313
SELECT a AS abc, b FROM t1 outr WHERE b =
unknown's avatar
unknown committed
2314
(SELECT MIN(b) FROM t1 WHERE a=outr.a);
2315 2316 2317 2318
abc	b
1	2
2	3
3	4
2319
INSERT INTO t2 SELECT a AS abc, b FROM t1 outr WHERE b =
unknown's avatar
unknown committed
2320
(SELECT MIN(b) FROM t1 WHERE a=outr.a);
2321 2322 2323 2324 2325
select * from t2;
c	d
1	2
2	3
3	4
2326
CREATE TABLE t3 SELECT a AS abc, b FROM t1 outr WHERE b =
unknown's avatar
unknown committed
2327
(SELECT MIN(b) FROM t1 WHERE a=outr.a);
2328 2329 2330 2331 2332
select * from t3;
abc	b
1	2
2	3
3	4
unknown's avatar
unknown committed
2333
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);";
unknown's avatar
unknown committed
2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344
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;
unknown's avatar
unknown committed
2345
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);";
unknown's avatar
unknown committed
2346 2347 2348 2349 2350 2351 2352
execute stmt1;
select * from t3;
abc	b
1	2
2	3
3	4
deallocate prepare stmt1;
2353
DROP TABLE t1, t2, t3;
2354 2355 2356 2357 2358 2359 2360 2361
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;
unknown's avatar
unknown committed
2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374
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;
2375 2376 2377 2378 2379 2380 2381 2382 2383
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
unknown's avatar
unknown committed
2384
drop table t1;
2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405
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;
2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426
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
unknown's avatar
unknown committed
2427 2428 2429 2430 2431 2432 2433
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;
2434 2435 2436 2437 2438 2439 2440 2441 2442
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)
2443
drop table t1;
2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454
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;
2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469
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;
2470
set @got_val= (SELECT 1 FROM (SELECT 'A' as my_col) as T1 ) ;
2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482
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;
2483 2484 2485 2486 2487 2488 2489 2490
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;
2491 2492 2493 2494 2495
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;
2496 2497 2498 2499 2500 2501 2502 2503 2504
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;
2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520
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 ''
unknown's avatar
unknown committed
2521
) ENGINE=MyISAM;
2522 2523
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');
2524
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');
2525 2526
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 */;
2527 2528
SELECT DISTINCT Continent AS c FROM t1 outr WHERE
Code <> SOME ( SELECT Code FROM t1 WHERE Continent = outr.Continent AND
unknown's avatar
unknown committed
2529
Population < 200);
2530 2531 2532
c
Oceania
drop table t1;
unknown's avatar
unknown committed
2533 2534 2535
create table t1 (a1 int);
create table t2 (b1 int);
select * from t1 where a2 > any(select b1 from t2);
2536
ERROR 42S22: Unknown column 'a2' in 'IN/ALL/ANY subquery'
unknown's avatar
unknown committed
2537 2538 2539
select * from t1 where a1 > any(select b1 from t2);
a1
drop table t1,t2;
2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553
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;
2554 2555 2556 2557 2558 2559 2560 2561
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;
2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575
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;
unknown's avatar
unknown committed
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
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,
2638
t1.categoryid,
unknown's avatar
unknown committed
2639 2640
t2.courseid,
date_format(date, '%b%y') as colhead
2641 2642
from t2
join t1 on t2.courseid=t1.courseid
unknown's avatar
unknown committed
2643 2644
join
(
2645 2646 2647 2648 2649 2650 2651 2652 2653
select
t5.userid,
parentid,
parentgroup,
childid,
groupname,
grouptypeid
from t5
join
unknown's avatar
unknown committed
2654
(
2655 2656 2657 2658 2659 2660 2661 2662 2663
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
unknown's avatar
unknown committed
2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674
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
2675 2676 2677 2678 2679 2680 2681 2682 2683
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;
unknown's avatar
unknown committed
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
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)
2731
drop table t1;
2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753
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;
2754 2755 2756 2757 2758 2759
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;
unknown's avatar
unknown committed
2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773
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
unknown's avatar
unknown committed
2774
insert into t2 values (null,null,'N');
2775 2776 2777 2778 2779 2780
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');
unknown's avatar
unknown committed
2781 2782
SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N') as 'test' from t1;
one	two	test
2783 2784 2785
1	2	NULL
2	3	NULL
3	4	NULL
unknown's avatar
unknown committed
2786 2787
5	6	1
7	8	1
2788 2789 2790 2791 2792 2793 2794
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
unknown's avatar
unknown committed
2795 2796 2797 2798 2799 2800 2801
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
2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825
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;
2826 2827 2828
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
2829
Warnings:
2830
Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<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`
2831
explain extended SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N');
2832
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
2833 2834
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	100.00	Using where; FirstMatch(t1)
2835
Warnings:
2836
Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`two` = `test`.`t1`.`two`) and (`test`.`t2`.`one` = `test`.`t1`.`one`) and (`test`.`t2`.`flag` = 'N'))
2837
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;
2838 2839 2840
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; Using filesort
2841
Warnings:
2842
Note	1003	select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<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`
unknown's avatar
unknown committed
2843
DROP TABLE t1,t2;
unknown's avatar
unknown committed
2844 2845 2846 2847 2848 2849
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;
unknown's avatar
unknown committed
2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
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
unknown's avatar
unknown committed
2866
DROP TABLE t1,t2,t3;
2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881
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;
2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899
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
2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925
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
unknown's avatar
unknown committed
2926
drop table t1;
2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938
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");
2939 2940 2941
select * from t1 r1
where (r1.retailerID,(r1.changed)) in
(SELECT r2.retailerId,(max(changed)) from t1 r2
2942 2943 2944 2945 2946 2947 2948
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;
2949 2950 2951 2952
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');
2953 2954 2955
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;
2956 2957 2958
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	PRIMARY	NULL	NULL	NULL	1	
1	PRIMARY	r	const	PRIMARY	PRIMARY	4	const	1	
2959
2	DEPENDENT SUBQUERY	t2	range	b	b	40	NULL	2	Using index condition
2960 2961 2962
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;
2963 2964
a	a	b
10	3	35989
2965 2966 2967
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;
2968 2969 2970
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	PRIMARY	NULL	NULL	NULL	1	
1	PRIMARY	r	const	PRIMARY	PRIMARY	4	const	1	
2971
2	DEPENDENT SUBQUERY	t2	range	b	b	40	NULL	2	Using index condition
2972 2973 2974
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;
2975 2976 2977
a	a	b
10	1	359
drop table t1,t2;
2978 2979 2980 2981 2982
CREATE TABLE t1 (
field1 int NOT NULL,
field2 int NOT NULL,
field3 int NOT NULL,
PRIMARY KEY  (field1,field2,field3)
2983
);
2984 2985 2986 2987
CREATE TABLE t2 (
fieldA int NOT NULL,
fieldB int NOT NULL,
PRIMARY KEY  (fieldA,fieldB)
2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000
);
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
3001
HAVING COUNT(*) >= ALL (SELECT fieldB
3002 3003 3004 3005 3006 3007
FROM t2 WHERE fieldA = field1);
field1	field2
1	2
SELECT field1, field2
FROM  t1
GROUP BY field1, field2
3008
HAVING COUNT(*) < ANY (SELECT fieldB
3009 3010 3011 3012 3013
FROM t2 WHERE fieldA = field1);
field1	field2
1	1
1	3
DROP TABLE t1, t2;
unknown's avatar
unknown committed
3014 3015 3016 3017 3018 3019 3020 3021
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	
3022
2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	2	Using index; Full scan on NULL key
unknown's avatar
unknown committed
3023 3024 3025 3026 3027 3028
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;
3029 3030
CREATE TABLE t1 (a DATETIME);
INSERT INTO t1 VALUES ('1998-09-23'), ('2003-03-25');
3031 3032
CREATE TABLE t2 AS SELECT
(SELECT a FROM t1 WHERE a < '2000-01-01') AS sub_a
3033 3034 3035 3036
FROM t1 WHERE a > '2000-01-01';
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
unknown's avatar
unknown committed
3037
  `sub_a` datetime DEFAULT NULL
3038 3039 3040 3041 3042
) 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` (
unknown's avatar
unknown committed
3043
  `a` datetime DEFAULT NULL
3044 3045
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1,t2,t3;
3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058
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;
unknown's avatar
unknown committed
3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107
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
unknown's avatar
unknown committed
3108
SELECT a FROM t1
unknown's avatar
unknown committed
3109 3110 3111 3112 3113 3114 3115
ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b));
a
2
4
1
3
unknown's avatar
unknown committed
3116
SELECT a FROM t1
unknown's avatar
unknown committed
3117 3118 3119
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
unknown's avatar
unknown committed
3120
SELECT a FROM t1
unknown's avatar
unknown committed
3121 3122 3123 3124 3125 3126 3127
ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4),
(SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b));
a
2
1
3
4
unknown's avatar
unknown committed
3128
SELECT a FROM t1
unknown's avatar
unknown committed
3129 3130 3131 3132
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;
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
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;
unknown's avatar
unknown committed
3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184
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;
unknown's avatar
unknown committed
3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197
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 );
3198
SELECT c1,c2 FROM t1 LEFT JOIN t2 ON c1 = c2
unknown's avatar
unknown committed
3199 3200 3201 3202 3203
WHERE EXISTS (SELECT c3 FROM t3 WHERE c2 IS NULL );
c1	c2
2	NULL
3	NULL
DROP TABLE t1,t2,t3;
3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225
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;
unknown's avatar
unknown committed
3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238
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;
unknown's avatar
unknown committed
3239 3240
CREATE TABLE t1(select_id BIGINT, values_id BIGINT);
INSERT INTO t1 VALUES (1, 1);
3241
CREATE TABLE t2 (select_id BIGINT, values_id BIGINT,
unknown's avatar
unknown committed
3242 3243
PRIMARY KEY(select_id,values_id));
INSERT INTO t2 VALUES (0, 1), (0, 2), (0, 3), (1, 5);
3244
SELECT values_id FROM t1
unknown's avatar
unknown committed
3245 3246 3247 3248
WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id IN (1, 0));
values_id
1
3249
SELECT values_id FROM t1
unknown's avatar
unknown committed
3250 3251 3252 3253
WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id BETWEEN 0 AND 1);
values_id
1
3254
SELECT values_id FROM t1
unknown's avatar
unknown committed
3255 3256 3257 3258 3259
WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id = 0 OR select_id = 1);
values_id
1
DROP TABLE t1, t2;
3260 3261 3262 3263 3264 3265
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;
unknown's avatar
unknown committed
3266 3267 3268
CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (c int, d int);
CREATE TABLE t3 (e int);
3269
INSERT INTO t1 VALUES
unknown's avatar
unknown committed
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
(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
3332
WHERE MIN(b) < d AND
unknown's avatar
unknown committed
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
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
3383
WHERE EXISTS(SELECT t3.e FROM t3
unknown's avatar
unknown committed
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
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;
unknown's avatar
unknown committed
3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421
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
3422
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	9	Using temporary; Using filesort
unknown's avatar
unknown committed
3423 3424 3425 3426 3427 3428 3429 3430 3431 3432
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
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	9	Using where
3433
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	9	Using temporary; Using filesort
unknown's avatar
unknown committed
3434
DROP TABLE t1;
3435 3436 3437 3438 3439 3440 3441
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;
3442 3443 3444 3445 3446 3447
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;
3448 3449 3450 3451 3452 3453 3454 3455
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;
3456 3457 3458 3459 3460 3461
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;
3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482
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;
unknown's avatar
unknown committed
3483
CREATE TABLE t1 (
unknown's avatar
unknown committed
3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495
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)
);
3496
INSERT INTO t2 VALUES
unknown's avatar
unknown committed
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
(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;
unknown's avatar
unknown committed
3528
CREATE TABLE t1 (
unknown's avatar
unknown committed
3529 3530 3531 3532 3533
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)
);
3534
INSERT INTO t1 VALUES
unknown's avatar
unknown committed
3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549
(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
3550
WHERE t1.t = (SELECT t1.t FROM t1
unknown's avatar
unknown committed
3551 3552 3553 3554 3555 3556 3557
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
3558
WHERE t1.t = (SELECT t1.t FROM t1
unknown's avatar
unknown committed
3559 3560 3561 3562 3563
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;
3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587
CREATE TABLE t1 (i INT);
(SELECT i FROM t1) UNION (SELECT i FROM t1);
i
SELECT sql_no_cache * FROM t1 WHERE NOT EXISTS
(
(SELECT i FROM t1) UNION
(SELECT i FROM t1)
);
i
SELECT * FROM t1
WHERE NOT EXISTS (((SELECT i FROM t1) UNION (SELECT i FROM t1)));
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 'UNION (SELECT i FROM t1)))' at line 2
explain select ((select t11.i from t1 t11) union (select t12.i from t1 t12))
from t1;
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 'union (select t12.i from t1 t12))
from t1' at line 1
explain select * from t1 where not exists
((select t11.i from t1 t11) union (select t12.i from t1 t12));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	const row not found
2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
DROP TABLE t1;
3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602
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;
3603 3604 3605
SELECT a,
(SELECT REPEAT(' ',250) FROM t1 i1
WHERE i1.b=t1.a ORDER BY RAND() LIMIT 1) AS a
3606 3607 3608 3609 3610 3611 3612 3613
FROM t1 ORDER BY a LIMIT 5;
a	a
0	NULL
0	NULL
0	NULL
0	NULL
0	NULL
DROP TABLE t1;
3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633
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
3634
SELECT COUNT(DISTINCT t1.b),
3635 3636 3637 3638 3639 3640 3641 3642 3643 3644
(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)
)
3645
)
3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659
FROM t1 GROUP BY t1.a;
(
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
)
2
1
1
SELECT (
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
3660 3661
)
FROM t1 GROUP BY t1.a LIMIT 1)
3662 3663 3664 3665 3666 3667 3668
FROM t1 t2
GROUP BY t2.a;
(
SELECT (
SELECT (
SELECT COUNT(DISTINCT t1.b)
)
3669
)
3670 3671 3672 3673 3674
FROM t1 GROUP BY t1.a LIMIT 1)
2
2
2
DROP TABLE t1,t2;
3675
CREATE TABLE t1 (a int, b int, PRIMARY KEY (b));
unknown's avatar
unknown committed
3676 3677
CREATE TABLE t2 (x int auto_increment, y int, z int,
PRIMARY KEY (x), FOREIGN KEY (y) REFERENCES t1 (b));
3678 3679 3680 3681 3682
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;
unknown's avatar
unknown committed
3683
SET SESSION sort_buffer_size = 32 * 1024;
3684
SELECT SQL_NO_CACHE COUNT(*)
unknown's avatar
unknown committed
3685 3686 3687 3688 3689
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;
3690
SELECT SQL_NO_CACHE COUNT(*)
unknown's avatar
unknown committed
3691 3692 3693 3694
FROM (SELECT  a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
FROM t1) t;
COUNT(*)
3000
3695
DROP TABLE t1,t2,t3;
3696 3697 3698 3699
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);
unknown's avatar
unknown committed
3700
SELECT * FROM t1
3701
WHERE EXISTS (SELECT c FROM t2 WHERE c=1
unknown's avatar
unknown committed
3702
UNION
3703 3704 3705 3706
SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
INSERT INTO t1 VALUES ('bb', 2), ('cc', 3), ('dd',1);
unknown's avatar
unknown committed
3707
SELECT * FROM t1
3708
WHERE EXISTS (SELECT c FROM t2 WHERE c=1
unknown's avatar
unknown committed
3709
UNION
3710 3711 3712 3713 3714 3715 3716 3717 3718
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);
unknown's avatar
unknown committed
3719
SELECT * FROM t1
3720
WHERE EXISTS (SELECT t2.c FROM t2 JOIN t3 ON t2.c=t3.c WHERE t2.c=1
unknown's avatar
unknown committed
3721
UNION
3722 3723 3724 3725 3726 3727 3728
SELECT c from t2 WHERE c=t1.c);
id	c
aa	1
bb	2
cc	3
dd	1
DROP TABLE t1,t2,t3;
unknown's avatar
unknown committed
3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750
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;
3751
SELECT f2, AVG(f21),
unknown's avatar
unknown committed
3752 3753 3754 3755 3756 3757 3758
(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);
3759 3760 3761
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'),
unknown's avatar
unknown committed
3762
(3,2,'k'), (3,1,'l'), (1,9,'m');
3763 3764
SELECT a, MAX(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b)) AS test
unknown's avatar
unknown committed
3765 3766 3767 3768 3769 3770
FROM t1 GROUP BY a;
a	MAX(b)	test
1	9	m
2	3	h
3	4	i
DROP TABLE t1;
unknown's avatar
unknown committed
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
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;
3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896
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;
3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914
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
3915
SELECT COUNT(*), a
3916 3917 3918 3919 3920 3921
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;
3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940
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;
3941 3942 3943 3944 3945
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),
3946
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b + 0)) as test
3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967
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)
3968
LIMIT 1) FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1) as test
3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989
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)
3990
FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1) as test
3991 3992 3993 3994 3995 3996 3997 3998
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)
3999
FROM t1 WHERE t1.a=tt.a GROUP BY a LIMIT 1)) as test
4000 4001 4002 4003 4004
FROM t1 as tt GROUP BY tt.a;
a	test
1	n
2	o
3	p
unknown's avatar
unknown committed
4005
DROP TABLE t1;
unknown's avatar
unknown committed
4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027
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;
4028
DROP TABLE t1;
unknown's avatar
unknown committed
4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041
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
4042
SELECT
unknown's avatar
unknown committed
4043 4044 4045
SUM( (SELECT AVG( (SELECT COUNT(*) FROM t1 t HAVING t1.a < 12) ) FROM t2) )
FROM t1;
ERROR HY000: Invalid use of group function
4046
SELECT t1.a as XXA,
unknown's avatar
unknown committed
4047 4048 4049 4050
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;
unknown's avatar
unknown committed
4051 4052 4053 4054 4055 4056 4057
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	1	Using where; Using index
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary; Using filesort
DROP TABLE t1;
4058 4059 4060 4061 4062
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);
4063
SELECT id, st FROM t1
4064 4065 4066 4067 4068
WHERE st IN ('GA','FL') AND EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id);
id	st
3	FL
1	GA
7	FL
4069
SELECT id, st FROM t1
4070 4071 4072 4073 4074 4075
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
4076
SELECT id, st FROM t1
4077 4078 4079 4080
WHERE st IN ('GA','FL') AND NOT EXISTS(SELECT 1 FROM t2 WHERE t2.id=t1.id);
id	st
2	GA
4	FL
4081
SELECT id, st FROM t1
4082 4083 4084 4085 4086 4087
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;
4088 4089 4090 4091
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
EXPLAIN EXTENDED
SELECT * FROM (SELECT count(*) FROM t1 GROUP BY a) as res;
4092 4093 4094 4095 4096 4097
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;
4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118
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;
4119 4120
Warnings:
Warning	1292	Truncated incorrect sort_buffer_size value: '8192'
4121 4122 4123 4124 4125
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;
unknown's avatar
unknown committed
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
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;
4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169
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;
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
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;
4219 4220 4221 4222 4223 4224 4225 4226 4227
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
4228 4229
1	PRIMARY	t1	index	I1	I1	2	NULL	2	Using index; LooseScan
1	PRIMARY	t1	ref	I2	I2	13	test.t1.a	2	Using index condition
4230 4231 4232 4233 4234 4235 4236 4237
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
4238 4239
1	PRIMARY	t2	index	I1	I1	4	NULL	2	Using index; LooseScan
1	PRIMARY	t2	ref	I2	I2	13	test.t2.a	2	Using index condition
4240 4241 4242 4243 4244
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
4245 4246
1	PRIMARY	t1	index	I1	I1	2	NULL	2	Using where; Using index; LooseScan
1	PRIMARY	t1	ref	I2	I2	13	test.t1.a	2	Using index condition
4247 4248 4249
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
a	b
DROP TABLE t1,t2;
unknown's avatar
unknown committed
4250 4251
CREATE TABLE t1(a INT, b INT);
INSERT INTO t1 VALUES (1,1), (1,2), (2,3), (2,4);
4252
EXPLAIN
unknown's avatar
unknown committed
4253 4254 4255 4256 4257 4258 4259 4260
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'
4261
EXPLAIN
unknown's avatar
unknown committed
4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274
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;
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
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (1),(2);
INSERT INTO t2 VALUES (1),(2);
SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a));
2
2
2
EXPLAIN EXTENDED
SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.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	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
Note	1003	select 2 AS `2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(exists(select 1 from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)))
EXPLAIN EXTENDED
SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a) UNION
(SELECT 1 FROM t2 WHERE t1.a = t2.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	Using where
2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
3	DEPENDENT UNION	t2	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.t1.a' of SELECT #2 was resolved in SELECT #1
Note	1276	Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #1
Note	1003	select 2 AS `2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(exists((select 1 from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) union (select 1 from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`))))
DROP TABLE t1,t2;
4304 4305
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
4306 4307 4308
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);
4309 4310 4311
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;
4312
set session sort_buffer_size= 33*1024;
4313
select count(*) from t1 where f12 =
4314 4315 4316
(select f22 from t2 where f22 = f12 order by f21 desc, f22, f23 limit 1);
count(*)
3
4317
drop table t0,t1,t2;
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
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
4354 4355
LIMIT 1) IS NULL,
0,
4356 4357 4358
t3.f5
)
) AS a6
4359
FROM
4360 4361 4362 4363 4364
t2, t3, t1 JOIN t2 a1 ON t1.f9 = a1.f4
GROUP BY a4;
a4	f3	a6
1	NULL	NULL
2	NULL	NULL
4365
DROP TABLE t1, t2, t3, t4;
4366 4367
create table t1 (a float(5,4) zerofill);
create table t2 (a float(5,4),b float(2,0));
4368
select t1.a from t1 where
4369 4370 4371
t1.a= (select b from t2 limit 1) and not
t1.a= (select a from t2 limit 1) ;
a
unknown's avatar
unknown committed
4372
drop table t1, t2;
4373 4374 4375
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);
unknown's avatar
unknown committed
4376
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
4377 4378
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using temporary; Using filesort
4379
Warnings:
4380
Note	1003	select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`))))))
4381
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a);
unknown's avatar
unknown committed
4382
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
4383 4384
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using temporary; Using filesort
4385
Warnings:
4386
Note	1003	select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`))))))
4387
DROP TABLE t1;
4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409
#
# 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.
4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429
#
# 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
4430
2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
4431 4432 4433 4434 4435 4436
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;
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
#
# 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;
unknown's avatar
unknown committed
4462
End of 5.0 tests.
4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 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
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;
Matthias Leich's avatar
Matthias Leich committed
4660
CREATE TABLE t1 (a INT, b INT);
unknown's avatar
unknown committed
4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682
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;
Matthias Leich's avatar
Matthias Leich committed
4683
CREATE TABLE t1 (s1 CHAR(1));
4684 4685 4686 4687 4688
INSERT INTO t1 VALUES ('a');
SELECT * FROM t1 WHERE _utf8'a' = ANY (SELECT s1 FROM t1);
s1
a
DROP TABLE t1;
Matthias Leich's avatar
Matthias Leich committed
4689 4690
CREATE TABLE t1(c INT, KEY(c));
CREATE TABLE t2(a INT, b INT);
Tatiana A. Nurnberg's avatar
Tatiana A. Nurnberg committed
4691 4692 4693 4694 4695
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;
Matthias Leich's avatar
Matthias Leich committed
4696
CREATE TABLE t1(pk INT PRIMARY KEY, a INT, INDEX idx(a));
Igor Babaev's avatar
Igor Babaev committed
4697
INSERT INTO t1 VALUES (1, 10), (3, 30), (2, 20);
Matthias Leich's avatar
Matthias Leich committed
4698
CREATE TABLE t2(pk INT PRIMARY KEY, a INT, b INT, INDEX idxa(a));
Igor Babaev's avatar
Igor Babaev committed
4699 4700 4701 4702 4703 4704 4705 4706
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;
Matthias Leich's avatar
Matthias Leich committed
4707
CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a), KEY b (b));
4708 4709
INSERT INTO t1 VALUES (1,NULL), (9,NULL);
CREATE TABLE t2 (
Matthias Leich's avatar
Matthias Leich committed
4710 4711 4712 4713
a INT,
b INT,
c INT,
d INT,
4714 4715 4716 4717 4718 4719
PRIMARY KEY (a),
UNIQUE KEY b (b,c,d),
KEY b_2 (b),
KEY c (c),
KEY d (d)
);
Matthias Leich's avatar
Matthias Leich committed
4720
INSERT INTO t2 VALUES
4721 4722 4723 4724 4725 4726
(43, 2, 11 ,30),
(44, 2, 12 ,30),
(45, 1, 1  ,10000),
(46, 1, 2  ,10000),
(556,1, 32 ,10000);
CREATE TABLE t3 (
Matthias Leich's avatar
Matthias Leich committed
4727 4728 4729
a INT,
b INT,
c INT,
4730 4731 4732 4733 4734 4735
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);
Matthias Leich's avatar
Matthias Leich committed
4736
explain
4737 4738
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
4739 4740 4741
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
4742 4743 4744 4745
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;
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
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;
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
# 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;
#
Matthias Leich's avatar
Matthias Leich committed
4810
# Bug#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
Sergey Petrunia's avatar
Sergey Petrunia committed
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
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;
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
#
# Bug#33204: INTO is allowed in subselect, causing inconsistent results
#
CREATE TABLE t1( a INT );
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2( a INT, b INT );
SELECT * 
FROM (SELECT a INTO @var FROM t1 WHERE a = 2) t1a;
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 'INTO @var FROM t1 WHERE a = 2) t1a' at line 2
SELECT * 
FROM (SELECT a INTO OUTFILE 'file' FROM t1 WHERE a = 2) t1a;
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 'INTO OUTFILE 'file' FROM t1 WHERE a = 2) t1a' at line 2
SELECT * 
FROM (SELECT a INTO DUMPFILE 'file' FROM t1 WHERE a = 2) t1a;
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 'INTO DUMPFILE 'file' FROM t1 WHERE a = 2) t1a' at line 2
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a INTO @var FROM t1 WHERE a = 2 
) t1a;
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 'INTO @var FROM t1 WHERE a = 2 
) t1a' at line 4
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a INTO OUTFILE 'file' FROM t1 WHERE a = 2 
) t1a;
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 'INTO OUTFILE 'file' FROM t1 WHERE a = 2 
) t1a' at line 4
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a INTO DUMPFILE 'file' FROM t1 WHERE a = 2 
) t1a;
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 'INTO DUMPFILE 'file' FROM t1 WHERE a = 2 
) t1a' at line 4
SELECT * FROM (SELECT a FROM t1 WHERE a = 2) t1a;
a
2
SELECT * FROM ( 
SELECT a FROM t1 WHERE a = 2 
UNION 
SELECT a FROM t1 WHERE a = 2 
) t1a;
a
2
SELECT * FROM ( 
SELECT 1 a 
UNION 
SELECT a FROM t1 WHERE a = 2 
UNION 
SELECT a FROM t1 WHERE a = 2 
) t1a;
a
1
2
SELECT * FROM ((SELECT 1 a) UNION SELECT 1 a);
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 ')' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a)) alias;
a
1
SELECT * FROM (SELECT 1 UNION SELECT 1) t1a;
1
1
SELECT * FROM ((SELECT 1 a INTO @a)) t1a;
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 'INTO @a)) t1a' at line 1
SELECT * FROM ((SELECT 1 a INTO OUTFILE 'file' )) t1a;
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 'INTO OUTFILE 'file' )) t1a' at line 1
SELECT * FROM ((SELECT 1 a INTO DUMPFILE 'file' )) t1a;
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 'INTO DUMPFILE 'file' )) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a INTO @a)) t1a;
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 'INTO @a)) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a INTO DUMPFILE 'file' )) t1a;
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 'INTO DUMPFILE 'file' )) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION (SELECT 1 a INTO OUTFILE 'file' )) t1a;
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 'INTO OUTFILE 'file' )) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION ((SELECT 1 a INTO @a))) t1a;
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 'INTO @a))) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION ((SELECT 1 a INTO DUMPFILE 'file' ))) t1a;
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 'INTO DUMPFILE 'file' ))) t1a' at line 1
SELECT * FROM (SELECT 1 a UNION ((SELECT 1 a INTO OUTFILE 'file' ))) t1a;
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 'INTO OUTFILE 'file' ))) t1a' at line 1
SELECT * FROM (SELECT 1 a ORDER BY a) t1a;
a
1
SELECT * FROM (SELECT 1 a UNION SELECT 1 a ORDER BY a) t1a;
a
1
SELECT * FROM (SELECT 1 a UNION SELECT 1 a LIMIT 1) t1a;
a
1
SELECT * FROM (SELECT 1 a UNION SELECT 1 a ORDER BY a LIMIT 1) t1a;
a
1
SELECT * FROM t1 JOIN  (SELECT 1 UNION SELECT 1) alias ON 1;
a	1
1	1
2	1
SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 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 ')) ON 1' at line 1
SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 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 'ON 1' at line 1
SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 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 ') ON 1' at line 1
SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 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 't1a ON 1' at line 1
SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 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 't1a ON 1' at line 1
SELECT * FROM t1 JOIN  (t1 t1a)  ON 1;
a	a
1	1
2	1
1	2
2	2
SELECT * FROM t1 JOIN ((t1 t1a)) ON 1;
a	a
1	1
2	1
1	2
2	2
SELECT * FROM (t1 t1a);
a
1
2
SELECT * FROM ((t1 t1a));
a
1
2
SELECT * FROM t1 JOIN  (SELECT 1 t1a) alias ON 1;
a	t1a
1	1
2	1
SELECT * FROM t1 JOIN ((SELECT 1 t1a)) alias ON 1;
a	t1a
1	1
2	1
SELECT * FROM t1 JOIN  (SELECT 1 a)  a ON 1;
a	a
1	1
2	1
SELECT * FROM t1 JOIN ((SELECT 1 a)) a ON 1;
a	a
1	1
2	1
SELECT * FROM (t1 JOIN (SELECT 1) t1a1 ON 1) t1a2;
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 't1a2' at line 1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ANY ( SELECT 3 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 INTO @a);
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 'INTO @a)' at line 1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 INTO OUTFILE 'file' );
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 'INTO OUTFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 INTO DUMPFILE 'file' );
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 'INTO DUMPFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ( SELECT 1 INTO @a);
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 'INTO @a)' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 INTO OUTFILE 'file' );
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 'INTO OUTFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 INTO DUMPFILE 'file' );
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 'INTO DUMPFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 INTO @a);
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 'INTO @a)' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 INTO OUTFILE 'file' );
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 'INTO OUTFILE 'file' )' at line 1
SELECT * FROM t1 WHERE a = ( SELECT 1 UNION SELECT 1 INTO DUMPFILE 'file' );
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 'INTO DUMPFILE 'file' )' at line 1
SELECT ( SELECT 1 INTO @v );
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 'INTO @v )' at line 1
SELECT ( SELECT 1 INTO OUTFILE 'file' );
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 'INTO OUTFILE 'file' )' at line 1
SELECT ( SELECT 1 INTO DUMPFILE 'file' );
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 'INTO DUMPFILE 'file' )' at line 1
SELECT ( SELECT 1 UNION SELECT 1 INTO @v );
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 'INTO @v )' at line 1
SELECT ( SELECT 1 UNION SELECT 1 INTO OUTFILE 'file' );
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 'INTO OUTFILE 'file' )' at line 1
SELECT ( SELECT 1 UNION SELECT 1 INTO DUMPFILE 'file' );
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 'INTO DUMPFILE 'file' )' at line 1
SELECT ( SELECT a FROM t1 WHERE a = 1 ), a FROM t1;
( SELECT a FROM t1 WHERE a = 1 )	a
1	1
1	2
SELECT ( SELECT a FROM t1 WHERE a = 1 UNION SELECT 1 ), a FROM t1;
( SELECT a FROM t1 WHERE a = 1 UNION SELECT 1 )	a
1	1
1	2
SELECT * FROM t2 WHERE (a, b) IN (SELECT a, b FROM t2);
a	b
SELECT 1 UNION ( SELECT 1 UNION 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 'UNION SELECT 1 )' at line 1
( SELECT 1 UNION SELECT 1 ) UNION 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 'UNION SELECT 1 ) UNION SELECT 1' at line 1
SELECT ( SELECT 1 UNION ( SELECT 1 UNION 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 'UNION SELECT 1 ) )' at line 1
SELECT ( ( SELECT 1 UNION SELECT 1 ) UNION 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 'UNION SELECT 1' at line 1
SELECT ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
( SELECT 1 UNION SELECT 1 UNION SELECT 1 )
1
SELECT ((SELECT 1 UNION SELECT 1 UNION SELECT 1));
((SELECT 1 UNION SELECT 1 UNION SELECT 1))
1
SELECT * FROM ( SELECT 1 UNION ( SELECT 1 UNION 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 'UNION SELECT 1 ) )' at line 1
SELECT * FROM ( ( SELECT 1 UNION SELECT 1 ) UNION 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 ') UNION SELECT 1 )' at line 1
SELECT * FROM ( SELECT 1 UNION SELECT 1 UNION SELECT 1 ) a;
1
1
SELECT * FROM t1 WHERE a =     ( SELECT 1 UNION ( SELECT 1 UNION 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 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 UNION ( SELECT 1 UNION 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 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION ( SELECT 1 UNION 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 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a IN    ( SELECT 1 UNION ( SELECT 1 UNION 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 'UNION SELECT 1 ) )' at line 1
SELECT * FROM t1 WHERE a =     ( ( SELECT 1 UNION SELECT 1 )  UNION 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 'UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a = ALL ( ( SELECT 1 UNION SELECT 1 )  UNION 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 'UNION SELECT 1 )  UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a = ANY ( ( SELECT 1 UNION SELECT 1 )  UNION 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 'UNION SELECT 1 )  UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a IN    ( ( SELECT 1 UNION SELECT 1 )  UNION 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 'UNION SELECT 1 )' at line 1
SELECT * FROM t1 WHERE a =     ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ALL ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a = ANY ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE a IN    ( SELECT 1 UNION SELECT 1 UNION SELECT 1 );
a
1
SELECT * FROM t1 WHERE EXISTS ( SELECT 1 UNION SELECT 1 INTO @v );
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 'INTO @v )' at line 1
SELECT EXISTS(SELECT 1+1);
EXISTS(SELECT 1+1)
1
SELECT EXISTS(SELECT 1+1 INTO @test);
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 'INTO @test)' at line 1
SELECT * FROM t1 WHERE a IN ( SELECT 1 UNION SELECT 1 INTO @v );
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 'INTO @v )' at line 1
SELECT * FROM t1 WHERE EXISTS ( SELECT 1 INTO @v );
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 'INTO @v )' at line 1
SELECT * FROM t1 WHERE a IN ( SELECT 1 INTO @v );
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 'INTO @v )' at line 1
DROP TABLE t1, t2;
5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122
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;
5123
set @@optimizer_switch=@save_optimizer_switch;
5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136
#
# 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;
5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148
#
# 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;
5149
End of 5.1 tests.
5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215
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
5216
3	0.00
5217
4	400.00
5218
5	0.00
5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238
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;
5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255
#
# 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;
End of 5.1 tests
5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272
#
# 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;