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Backport of subquery optimizations to 5.3.

Browse Source 
There are still test failures because of:
- Wrong query results in outer join + semi join
- EXPLAIN output differences
This commit is contained in:
Sergey Petrunya
2010-01-17 17:51:10 +03:00
parent 1a490f2da4
commit b83cb52e9e
57 changed files with 30727 additions and 504 deletions
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18
mysql-test/r/index_merge_myisam.result
View File

@@ -1419,19 +1419,19 @@ drop table t1;
#
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
set optimizer_switch='index_merge=off,index_merge_union=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
set optimizer_switch='index_merge_union=on';
select @@optimizer_switch;
@@optimizer_switch
index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
set optimizer_switch='default,index_merge_sort_union=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_condition_pushdown=on
index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
set optimizer_switch=4;
ERROR 42000: Variable 'optimizer_switch' can't be set to the value of '4'
set optimizer_switch=NULL;
@@ -1458,21 +1458,21 @@ set optimizer_switch=default;
set optimizer_switch='index_merge=off,index_merge_union=off,default';
select @@optimizer_switch;
@@optimizer_switch
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
set optimizer_switch=default;
select @@global.optimizer_switch;
@@global.optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
set @@global.optimizer_switch=default;
select @@global.optimizer_switch;
@@global.optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
#
# Check index_merge's @@optimizer_switch flags
#
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, c int, filler char(100),
@@ -1582,5 +1582,5 @@ id select_type table type possible_keys key key_len ref rows Extra
set optimizer_switch=default;
show variables like 'optimizer_switch';
Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
drop table t0, t1;

2
mysql-test/r/myisam_mrr.result
View File

@@ -394,7 +394,7 @@ drop table t0, t1;
# - engine_condition_pushdown does not affect ICP
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, key(a));

62
mysql-test/r/subselect.result
View File

@@ -1323,6 +1323,10 @@ create table t1 (a int, b int, index a (a,b));
create table t2 (a int, index a (a));
create table t3 (a int, b int, index a (a));
insert into t1 values (1,10), (2,20), (3,30), (4,40);
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
insert into t1
select rand()*100000+200,rand()*100000 from t0 A, t0 B, t0 C, t0 D;
insert into t2 values (2), (3), (4), (5);
insert into t3 values (10,3), (20,4), (30,5);
select * from t2 where t2.a in (select a from t1);
@@ -3554,28 +3558,6 @@ ORDER BY t1.t DESC LIMIT 1);
i1 i2 t i1 i2 t
24 1 2005-05-27 12:40:30 24 1 2006-06-20 12:29:40
DROP TABLE t1, t2;
CREATE TABLE t1 (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)
);
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 3
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));
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))' at line 2
DROP TABLE t1;
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;
@@ -3666,6 +3648,11 @@ DROP TABLE t1,t2;
CREATE TABLE t1 (a int, b int auto_increment, PRIMARY KEY (b));
CREATE TABLE t2 (x int auto_increment, y int, z int,
PRIMARY KEY (x), FOREIGN KEY (y) REFERENCES t1 (b));
create table t3 (a int);
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
insert into t1 select RAND()*1000, A.a + 10*(B.a+10*(C.a+10*D.a))
from t3 A, t3 B, t3 C, t3 D where D.a<3;
insert into t2(y,z) select t1.b, RAND()*1000 from t1, t3;
SET SESSION sort_buffer_size = 32 * 1024;
Warnings:
Warning 1292 Truncated incorrect sort_buffer_size value: '32768'
@@ -3680,7 +3667,7 @@ FROM (SELECT a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
FROM t1) t;
COUNT(*)
3000
DROP TABLE t1,t2;
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id char(4) PRIMARY KEY, c int);
CREATE TABLE t2 (c int);
INSERT INTO t1 VALUES ('aa', 1);
@@ -4260,37 +4247,20 @@ out_a MIN(b)
1 2
2 4
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 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 exists(select 1 AS `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));
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 FROM t2 WHERE t1.a = t2.a))' at line 2
DROP TABLE t1,t2;
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(f11 int, f12 int);
create table t2(f21 int unsigned not null, f22 int, f23 varchar(10));
insert into t1 values(1,1),(2,2), (3, 3);
insert into t2
select -1 , (@a:=(A.a + 10 * (B.a + 10 * (C.a+10*D.a))))/5000 + 1, @a
from t0 A, t0 B, t0 C, t0 D;
set session sort_buffer_size= 33*1024;
select count(*) from t1 where f12 =
(select f22 from t2 where f22 = f12 order by f21 desc, f22, f23 limit 1);
count(*)
3
drop table t1,t2;
drop table t0,t1,t2;
CREATE TABLE t4 (
f7 varchar(32) collate utf8_bin NOT NULL default '',
f10 varchar(32) collate utf8_bin default NULL,

514
mysql-test/r/subselect3.result
View File

@@ -1,4 +1,4 @@
drop table if exists t0, t1, t2, t3, t4, t5;
drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22;
create table t1 (oref int, grp int, ie int) ;
insert into t1 (oref, grp, ie) values
(1, 1, 1),
@@ -779,6 +779,15 @@ SELECT 1 FROM t1 WHERE t1.a NOT IN (SELECT 1 FROM t1, t2 WHERE 0);
1
1
DROP TABLE t1, t2;
create table t1 (a int, b decimal(13, 3));
insert into t1 values (1, 0.123);
select a, (select max(b) from t1) into outfile "subselect.out.file.1" from t1;
delete from t1;
load data infile "subselect.out.file.1" into table t1;
select * from t1;
a b
1 0.123
drop table t1;
CREATE TABLE t1 (
pk INT PRIMARY KEY,
int_key INT,
@@ -864,11 +873,18 @@ Level Code Message
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1276 Field or reference 'test.t1.c' of SELECT #3 was resolved in SELECT #2
Error 1054 Unknown column 'c' in 'field list'
Note 1003 select `c` AS `c` from (select (select count(`test`.`t1`.`a`) AS `COUNT(a)` from (select count(`test`.`t1`.`b`) AS `COUNT(b)` from `test`.`t1`) `x` group by `t1`.`c`) AS `(SELECT COUNT(a) FROM
Note 1003 select `c` AS `c` from (select (select count(`test`.`t1`.`a`) AS `COUNT(a)` from dual group by `c`) AS `(SELECT COUNT(a) FROM
(SELECT COUNT(b) FROM t1) AS x GROUP BY c
)` from `test`.`t1` group by `test`.`t1`.`b`) `y`
DROP TABLE t1;
End of 5.0 tests
#
# BUG#36896: Server crash on SELECT FROM DUAL
#
create table t1 (a int);
select 1 as res from dual where (1) in (select * from t1);
res
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
@@ -895,3 +911,497 @@ t1.a < (select t4.a+10
from t4, t5 limit 2));
ERROR 21000: Subquery returns more than 1 row
drop table t0, t1, t2, t3, t4, t5;
#
# BUG#48177 - SELECTs with NOT IN subqueries containing NULL
# values return too many records
#
CREATE TABLE t1 (
i1 int DEFAULT NULL,
i2 int DEFAULT NULL
) ;
INSERT INTO t1 VALUES (1, NULL);
INSERT INTO t1 VALUES (2, 3);
INSERT INTO t1 VALUES (4, NULL);
INSERT INTO t1 VALUES (4, 0);
INSERT INTO t1 VALUES (NULL, NULL);
CREATE TABLE t2 (
i1 int DEFAULT NULL,
i2 int DEFAULT NULL
) ;
INSERT INTO t2 VALUES (4, NULL);
INSERT INTO t2 VALUES (5, 0);
Data in t1
SELECT i1, i2 FROM t1;
i1 i2
1 NULL
2 3
4 NULL
4 0
NULL NULL
Data in subquery (should be filtered out)
SELECT i1, i2 FROM t2 ORDER BY i1;
i1 i2
4 NULL
5 0
FLUSH STATUS;
SELECT i1, i2
FROM t1
WHERE (i1, i2)
NOT IN (SELECT i1, i2 FROM t2);
i1 i2
1 NULL
2 3
# Check that the subquery only has to be evaluated once
# for all-NULL values even though there are two (NULL,NULL) records
# Baseline:
SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name Value
Handler_read_rnd_next 17
INSERT INTO t1 VALUES (NULL, NULL);
FLUSH STATUS;
SELECT i1, i2
FROM t1
WHERE (i1, i2)
NOT IN (SELECT i1, i2 FROM t2);
i1 i2
1 NULL
2 3
# Handler_read_rnd_next should be one more than baseline
# (read record from t1, but do not read from t2)
SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name Value
Handler_read_rnd_next 18
DROP TABLE t1,t2;
End of 5.1 tests
CREATE TABLE t1 (
a int(11) NOT NULL,
b int(11) NOT NULL,
c datetime default NULL,
PRIMARY KEY (a),
KEY idx_bc (b,c)
);
INSERT INTO t1 VALUES
(406989,67,'2006-02-23 17:08:46'), (150078,67,'2005-10-26 11:17:45'),
(406993,67,'2006-02-27 11:20:57'), (245655,67,'2005-12-08 15:59:08'),
(406994,67,'2006-02-27 11:26:46'), (256,67,NULL),
(398341,67,'2006-02-20 04:48:44'), (254,67,NULL),(1120,67,NULL),
(406988,67,'2006-02-23 17:07:22'), (255,67,NULL),
(398340,67,'2006-02-20 04:38:53'),(406631,67,'2006-02-23 10:49:42'),
(245653,67,'2005-12-08 15:59:07'),(406992,67,'2006-02-24 16:47:18'),
(245654,67,'2005-12-08 15:59:08'),(406995,67,'2006-02-28 11:55:00'),
(127261,67,'2005-10-13 12:17:58'),(406991,67,'2006-02-24 16:42:32'),
(245652,67,'2005-12-08 15:58:27'),(398545,67,'2006-02-20 04:53:13'),
(154504,67,'2005-10-28 11:53:01'),(9199,67,NULL),(1,67,'2006-02-23 15:01:35'),
(223456,67,NULL),(4101,67,NULL),(1133,67,NULL),
(406990,67,'2006-02-23 18:01:45'),(148815,67,'2005-10-25 15:34:17'),
(148812,67,'2005-10-25 15:30:01'),(245651,67,'2005-12-08 15:58:27'),
(154503,67,'2005-10-28 11:52:38');
create table t11 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 asc;
create table t12 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 desc;
create table t21 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 asc;
create table t22 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 desc;
update t22 set c = '2005-12-08 15:58:27' where a = 255;
explain select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t11 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort; Start materialize; Scan
1 PRIMARY t12 ALL NULL NULL NULL NULL 8 Using where; End materialize; Using join buffer
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
a b c
256 67 NULL
drop table t1, t11, t12, t21, t22;
create table t1(a int);
insert into t1 values (0),(1);
set @@optimizer_switch='firstmatch=off';
explain
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY X ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY Z ALL NULL NULL NULL NULL 2 Materialize
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
subq
NULL
0
set @@optimizer_switch=default;
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 as select * from t0;
insert into t1 select a+10 from t0;
set @@optimizer_switch='firstmatch=off,materialization=off';
insert into t0 values(2);
explain select * from t1 where 2 in (select a from t0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; Start temporary; End temporary
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer
select * from t1 where 2 in (select a from t0);
a
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
set @@optimizer_switch='default,materialization=off';
explain select * from t1 where 2 in (select a from t0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; FirstMatch
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer
select * from t1 where 2 in (select a from t0);
a
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
set @@optimizer_switch=default;
explain select * from (select a from t0) X where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>)
2 DERIVED t0 ALL NULL NULL NULL NULL 11
drop table t0, t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));
insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;
insert into t1 select * from t1 where kp1 < 20;
create table t3 (a int);
insert into t3 select A.a + 10*B.a from t0 A, t0 B;
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
create table t4 (pk int primary key);
insert into t4 select a from t3;
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
and t4.pk=t1.c);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Using MRR; LooseScan
1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t1)
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
drop table t1, t3, t4;
create table t1 (a int) as select * from t0 where a < 5;
set @save_max_heap_table_size=@@max_heap_table_size;
set @@optimizer_switch='firstmatch=off,materialization=off';
set @@max_heap_table_size= 16384;
explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY E ALL NULL NULL NULL NULL 5 Start temporary
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer
1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer
flush status;
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
count(*)
5000
show status like 'Created_tmp_disk_tables';
Variable_name Value
Created_tmp_disk_tables 1
set @save_max_heap_table_size=@@max_heap_table_size;
set @@optimizer_switch=default;
drop table t0, t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2(a int);
insert into t2 values (1),(2);
create table t3 ( a int , filler char(100), key(a));
insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Materialize; Scan
1 PRIMARY t3 ref a a 5 test.t2.a 1
select * from t3 where a in (select a from t2);
a filler
1 filler
2 filler
drop table t0, t2, t3;
set @@optimizer_switch='firstmatch=off,materialization=off';
create table t1 (a date);
insert into t1 values ('2008-01-01'),('2008-01-01'),('2008-02-01'),('2008-02-01');
create table t2 (a int);
insert into t2 values (1),(2);
create table t3 (a char(10));
insert into t3 select * from t1;
insert into t3 values (1),(2);
explain select * from t2 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer
explain select * from t2 where a in (select a from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer
explain select * from t2 where a in (select a from t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer
explain select * from t1 where a in (select a from t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Start temporary
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer
drop table t1, t2, t3;
create table t1 (a decimal);
insert into t1 values (1),(2);
explain select * from t1 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Start temporary
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer
drop table t1;
set @@optimizer_switch=default;
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 as select * from t1;
create table t3 (a int, b int, filler char(100), key(a));
insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C;
explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Materialize; Scan
1 PRIMARY t3 ref a a 5 test.t2.a 10
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
explain select straight_join * from t2 X, t2 Y
where X.a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
create table t0 (a int, b int);
insert into t0 values(1,1);
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 system NULL NULL NULL NULL 1
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Materialize; Scan
1 PRIMARY t3 ref a a 5 test.t2.a 10
create table t4 as select a as x, a as y from t1;
explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 system NULL NULL NULL NULL 1
1 PRIMARY t4 ALL NULL NULL NULL NULL 10 Using where; Materialize; Scan
1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where
drop table t0,t1,t2,t3,t4;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, filler char(100), key(a,b));
insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B;
create table t2 as select * from t1;
explain select * from t2 where a in (select b from t1 where a=3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
drop table t1,t2;
create table t1 (a int, b int);
insert into t1 select a,a from t0;
create table t2 (a int, b int);
insert into t2 select A.a + 10*B.a, A.a + 10*B.a from t0 A, t0 B;
set @@optimizer_switch='firstmatch=off';
explain select * from t1 where (a,b) in (select a,b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Materialize
set @save_optimizer_search_depth=@@optimizer_search_depth;
set @@optimizer_search_depth=63;
explain select * from t1 where (a,b) in (select a,b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Materialize
set @@optimizer_search_depth=@save_optimizer_search_depth;
set @@optimizer_switch=default;
drop table t0, t1, t2;
create table t0 (a decimal(4,2));
insert into t0 values (10.24), (22.11);
create table t1 as select * from t0;
insert into t1 select * from t0;
explain select * from t0 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 2
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0)
select * from t0 where a in (select a from t1);
a
10.24
22.11
drop table t0, t1;
create table t0(a date);
insert into t0 values ('2008-01-01'),('2008-02-02');
create table t1 as select * from t0;
insert into t1 select * from t0;
explain select * from t0 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 2
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0)
select * from t0 where a in (select a from t1);
a
2008-01-01
2008-02-02
drop table t0, t1;
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 as select a as a, a as b, a as c from t0 where a < 3;
create table t2 as select a as a, a as b from t0 where a < 3;
insert into t2 select * from t2;
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY X ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 PRIMARY Y ALL NULL NULL NULL NULL 6 Using join buffer
1 PRIMARY Z ALL NULL NULL NULL NULL 6 End materialize; Using join buffer
drop table t0,t1,t2;
BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307
CREATE TABLE t1 (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`int_key` int(11) DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `int_key` (`int_key`)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,9),(2,3),(3,8),(4,6),(5,9),(6,5),(7,5),(8,9),(9,1),(10,10);
SELECT `pk` FROM t1 AS OUTR WHERE `int_key` = ALL (
SELECT `int_key` FROM t1 AS INNR WHERE INNR . `pk` >= 9
);
pk
DROP TABLE t1;
BUG#40118 Crash when running Batched Key Access and requiring one match for each key
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, key(a));
insert into t1 select * from t0;
alter table t1 add b int not null, add filler char(200);
insert into t1 select * from t1;
insert into t1 select * from t1;
set @save_join_cache_level=@@join_cache_level;
set join_cache_level=6;
select * from t0 where t0.a in (select t1.a from t1 where t1.b=0);
a
0
1
2
3
4
5
6
7
8
9
set join_cache_level=@save_join_cache_level;
drop table t0, t1;
#
# BUG#32665 Query with dependent subquery is too slow
#
create table t1 (
idIndividual int primary key
);
insert into t1 values (1),(2);
create table t2 (
idContact int primary key,
contactType int,
idObj int
);
insert into t2 values (1,1,1),(2,2,2),(3,3,3);
create table t3 (
idAddress int primary key,
idContact int,
postalStripped varchar(100)
);
insert into t3 values (1,1, 'foo'), (2,2,'bar');
The following must be converted to a semi-join:
explain extended SELECT a.idIndividual FROM t1 a
WHERE a.idIndividual IN
( SELECT c.idObj FROM t3 cona
INNER JOIN t2 c ON c.idContact=cona.idContact
WHERE cona.postalStripped='T2H3B2'
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY cona ALL NULL NULL NULL NULL 2 100.00 Using where; Start materialize; Scan
1 PRIMARY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 End materialize
1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer
Warnings:
Note 1003 select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where ((`test`.`c`.`idContact` = `test`.`cona`.`idContact`) and (`test`.`a`.`idIndividual` = `test`.`c`.`idObj`) and (`test`.`cona`.`postalStripped` = 'T2H3B2'))
drop table t1,t2,t3;
#
# BUG#47367 Crash in Name_resolution_context::process_error
#
SET SESSION optimizer_switch = 'default,semijoin=off';
CREATE TABLE t1 (f1 INTEGER);
CREATE TABLE t2 LIKE t1;
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
CALL p1;
f1
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
f1
DROP PROCEDURE p1;
# Restore the original column list of table t2:
ALTER TABLE t2 CHANGE COLUMN my_column f1 INT;
SET SESSION optimizer_switch = 'semijoin=on';
# Recreate procedure so that we eliminate any caching effects
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
CALL p1;
f1
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
ERROR 42S22: Unknown column 'f1' in 'where clause'
DROP PROCEDURE p1;
DROP TABLE t1, t2;

1416
mysql-test/r/subselect3_jcl6.result Normal file
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#
# Bug #46791: Assertion failed:(table->key_read==0),function unknown
# function,file sql_base.cc
#
CREATE TABLE t1 (a INT, b INT, KEY(a));
INSERT INTO t1 VALUES (1,1),(2,2);
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,1),(2,2);
CREATE TABLE t3 LIKE t1;
# should have 1 impossible where and 2 dependent subqueries
EXPLAIN
SELECT 1 FROM t1
WHERE NOT EXISTS (SELECT 1 FROM t2 WHERE 1 = (SELECT MIN(t2.b) FROM t3))
ORDER BY count(*);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 5 NULL 2 Using index; Using temporary
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL no matching row in const table
# should not crash the next statement
SELECT 1 FROM t1
WHERE NOT EXISTS (SELECT 1 FROM t2 WHERE 1 = (SELECT MIN(t2.b) FROM t3))
ORDER BY count(*);
1
1
# should not crash: the crash is caused by the previous statement
SELECT 1;
1
1
DROP TABLE t1,t2,t3;
#
# Bug #47106: Crash / segfault on adding EXPLAIN to a non-crashing
# query
#
CREATE TABLE t1 (
a INT,
b INT,
PRIMARY KEY (a),
KEY b (b)
);
INSERT INTO t1 VALUES (1, 1), (2, 1);
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 SELECT * FROM t1;
CREATE TABLE t3 LIKE t1;
INSERT INTO t3 SELECT * FROM t1;
# Should not crash.
# Should have 1 impossible where and 2 dependent subqs.
EXPLAIN
SELECT
(SELECT 1 FROM t1,t2 WHERE t2.b > t3.b)
FROM t3 WHERE 1 = 0 GROUP BY 1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 DEPENDENT SUBQUERY t1 index NULL PRIMARY 4 NULL 2 Using index
2 DEPENDENT SUBQUERY t2 index b b 5 NULL 2 Using where; Using index; Using join buffer
# should return 0 rows
SELECT
(SELECT 1 FROM t1,t2 WHERE t2.b > t3.b)
FROM t3 WHERE 1 = 0 GROUP BY 1;
(SELECT 1 FROM t1,t2 WHERE t2.b > t3.b)
DROP TABLE t1,t2,t3;
End of 5.0 tests.
#
# BUG#46743 "Azalea processing correlated, aggregate SELECT
# subqueries incorrectly"
#
CREATE TABLE t1 (c int);
INSERT INTO t1 VALUES (NULL);
CREATE TABLE t2 (d int , KEY (d));
INSERT INTO t2 VALUES (NULL),(NULL);
0 rows in subquery
SELECT 1 AS RESULT FROM t2,t1 WHERE d = c;
RESULT
base query
SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 ;
RESULT
NULL
EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
Warnings:
Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
Note 1003 select (select 1 AS `1` from `test`.`t2` where (`test`.`t2`.`d` = '0')) AS `RESULT` from dual
first equivalent variant
SELECT (SELECT 1 FROM t2 WHERE d = IFNULL(c,NULL)) AS RESULT FROM t1 GROUP BY c ;
RESULT
NULL
EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = IFNULL(c,NULL)) AS RESULT FROM t1 GROUP BY c;
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 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
Warnings:
Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
Note 1003 select (select 1 AS `1` from `test`.`t2` where (`test`.`t2`.`d` = ifnull('0',NULL))) AS `RESULT` from dual group by '0'
second equivalent variant
SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 GROUP BY c ;
RESULT
NULL
EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 GROUP BY c ;
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 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
Warnings:
Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
Note 1003 select (select 1 AS `1` from `test`.`t2` where (`test`.`t2`.`d` = '0')) AS `RESULT` from dual group by '0'
DROP TABLE t1,t2;
#
# BUG#45928 "Differing query results depending on MRR and
# engine_condition_pushdown settings"
#
CREATE TABLE `t1` (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`time_nokey` time NOT NULL,
`varchar_key` varchar(1) NOT NULL,
`varchar_nokey` varchar(1) NOT NULL,
PRIMARY KEY (`pk`),
KEY `varchar_key` (`varchar_key`)
) AUTO_INCREMENT=12 DEFAULT CHARSET=latin1;
INSERT INTO `t1` VALUES (10,'00:00:00','i','i'),(11,'00:00:00','','');
set @old_optimizer_switch = @@session.optimizer_switch,
@old_optimizer_use_mrr = @@session.optimizer_use_mrr,
@old_engine_condition_pushdown = @@session.engine_condition_pushdown;
SET SESSION OPTIMIZER_SWITCH = 'materialization=off,semijoin=off,loosescan=off,firstmatch=off';
SET SESSION optimizer_use_mrr = 'force';
SET SESSION engine_condition_pushdown = 1;
SELECT `time_nokey` G1 FROM t1 WHERE ( `varchar_nokey` , `varchar_key` ) IN (
SELECT `varchar_nokey` , `varchar_nokey` ) AND `varchar_key` >= 'c' HAVING G1 ORDER
BY `pk` ;
G1
set @@session.optimizer_switch = @old_optimizer_switch,
@@session.optimizer_use_mrr = @old_optimizer_use_mrr,
@@session.engine_condition_pushdown = @old_engine_condition_pushdown;
DROP TABLE t1;
#
# BUG#45863 "Assertion failed: (fixed == 0), function fix_fields(),
# file item.cc, line 4448"
#
DROP TABLE IF EXISTS C, BB;
CREATE TABLE C (
varchar_nokey varchar(1) NOT NULL
);
INSERT INTO C VALUES
('k'),('a'),(''),('u'),('e'),('v'),('i'),
('t'),('u'),('f'),('u'),('m'),('j'),('f'),
('v'),('j'),('g'),('e'),('h'),('z');
CREATE TABLE BB (
varchar_nokey varchar(1) NOT NULL
);
INSERT INTO BB VALUES ('i'),('t');
SELECT varchar_nokey FROM C
WHERE (varchar_nokey, OUTR) IN (SELECT varchar_nokey
FROM BB);
ERROR 21000: Operand should contain 2 column(s)
SELECT varchar_nokey FROM C
WHERE (varchar_nokey, OUTR) IN (SELECT varchar_nokey, varchar_nokey
FROM BB);
ERROR 42S22: Unknown column 'OUTR' in 'IN/ALL/ANY subquery'
DROP TABLE C,BB;
#
# During work with BUG#45863 I had problems with a query that was
# optimized differently in regular and prepared mode.
# Because there was a bug in one of the selected strategies, I became
# aware of the problem. Adding an EXPLAIN query to catch this.
DROP TABLE IF EXISTS t1, t2, t3;
CREATE TABLE t1
(EMPNUM CHAR(3) NOT NULL,
EMPNAME CHAR(20),
GRADE DECIMAL(4),
CITY CHAR(15));
CREATE TABLE t2
(PNUM CHAR(3) NOT NULL,
PNAME CHAR(20),
PTYPE CHAR(6),
BUDGET DECIMAL(9),
CITY CHAR(15));
CREATE TABLE t3
(EMPNUM CHAR(3) NOT NULL,
PNUM CHAR(3) NOT NULL,
HOURS DECIMAL(5));
INSERT INTO t1 VALUES ('E1','Alice',12,'Deale');
INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna');
INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna');
INSERT INTO t1 VALUES ('E4','Don',12,'Deale');
INSERT INTO t1 VALUES ('E5','Ed',13,'Akron');
INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale');
INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna');
INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa');
INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale');
INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna');
INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale');
INSERT INTO t3 VALUES ('E1','P1',40);
INSERT INTO t3 VALUES ('E1','P2',20);
INSERT INTO t3 VALUES ('E1','P3',80);
INSERT INTO t3 VALUES ('E1','P4',20);
INSERT INTO t3 VALUES ('E1','P5',12);
INSERT INTO t3 VALUES ('E1','P6',12);
INSERT INTO t3 VALUES ('E2','P1',40);
INSERT INTO t3 VALUES ('E2','P2',80);
INSERT INTO t3 VALUES ('E3','P2',20);
INSERT INTO t3 VALUES ('E4','P2',20);
INSERT INTO t3 VALUES ('E4','P4',40);
INSERT INTO t3 VALUES ('E4','P5',80);
SET @old_optimizer_switch = @@session.optimizer_switch;
SET @old_join_cache_level = @@session.join_cache_level;
SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,semijoin=on';
SET SESSION join_cache_level = 1;
CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM);
EXPLAIN SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 PRIMARY t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'))";
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 PRIMARY t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
DEALLOCATE PREPARE stmt;
DROP INDEX t1_IDX ON t1;
CREATE INDEX t1_IDX ON t1(EMPNUM);
EXPLAIN SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 PRIMARY t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'))";
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 PRIMARY t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
DEALLOCATE PREPARE stmt;
DROP INDEX t1_IDX ON t1;
EXPLAIN SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 PRIMARY t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'))";
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 PRIMARY t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Start materialize
1 SIMPLE t3 ALL NULL NULL NULL NULL 12 Using where; End materialize; Using join buffer
DEALLOCATE PREPARE stmt;
SET SESSION optimizer_switch = @old_optimizer_switch;
SET SESSION join_cache_level = @old_join_cache_level;
DROP TABLE t1, t2, t3;
#
# BUG#45221 Query SELECT pk FROM C WHERE pk IN (SELECT int_key) failing
#
CREATE TABLE t1 (
i1_key INT,
i2 INT,
i3 INT,
KEY i1_index (i1_key)
);
INSERT INTO t1 VALUES (9,1,2), (9,2,1);
CREATE TABLE t2 (
pk INT NOT NULL,
i1 INT,
PRIMARY KEY (pk)
);
INSERT INTO t2 VALUES (9,1);
# Enable Index condition pushdown
SELECT @old_icp:=@@engine_condition_pushdown;
@old_icp:=@@engine_condition_pushdown
#
SET SESSION engine_condition_pushdown = 'ON';
SELECT pk
FROM t2
WHERE
pk IN (
SELECT i1_key
FROM t1
WHERE t1.i2 < t1.i3 XOR t2.i1 > 1
ORDER BY t1.i2 desc);
pk
9
# Restore old value for Index condition pushdown
SET SESSION engine_condition_pushdown=@old_icp;
DROP TABLE t1,t2;

1221
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4787
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114
mysql-test/r/subselect_nulls.result Normal file
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drop table if exists x1;
drop table if exists x2;
create table x1(k int primary key, d1 int, d2 int);
create table x2(k int primary key, d1 int, d2 int);
insert into x1 values
(10, 10, 10),
(20, 20, 20),
(21, 20, null),
(30, null, 30),
(40, 40, 40);
insert into x2 values
(10, 10, 10),
(20, 20, 20),
(21, 20, null),
(30, null, 30);
select *
from x1
where (d1, d2) in (select d1, d2
from x2);
k d1 d2
10 10 10
20 20 20
select *
from x1
where (d1, d2) in (select d1, d2
from x2) is true;
k d1 d2
10 10 10
20 20 20
select *
from x1
where (d1, d2) in (select d1, d2
from x2) is false;
k d1 d2
40 40 40
select *
from x1
where (d1, d2) in (select d1, d2
from x2) is unknown;
k d1 d2
21 20 NULL
30 NULL 30
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2);
k d1 d2
10 10 10
20 20 20
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2) is true;
k d1 d2
10 10 10
20 20 20
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2) is false;
k d1 d2
21 20 NULL
40 40 40
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2) is unknown;
k d1 d2
30 NULL 30
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2);
k d1 d2
10 10 10
20 20 20
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2) is true;
k d1 d2
10 10 10
20 20 20
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2) is false;
k d1 d2
21 20 NULL
30 NULL 30
40 40 40
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2) is unknown;
k d1 d2
select *
from x1
where exists (select *
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2);
k d1 d2
10 10 10
20 20 20
drop table x1;
drop table x2;

781
mysql-test/r/subselect_sj.result Normal file
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drop table if exists t0, t1, t2, t10, t11, t12;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int, b int);
insert into t1 values (0,0),(1,1),(2,2);
create table t2 as select * from t1;
create table t11(a int, b int);
create table t10 (pk int, a int, primary key(pk));
insert into t10 select a,a from t0;
create table t12 like t10;
insert into t12 select * from t10;
Flattened because of dependency, t10=func(t1)
explain select * from t1 where a in (select pk from t10);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
select * from t1 where a in (select pk from t10);
a b
0 0
1 1
2 2
A confluent case of dependency
explain select * from t1 where a in (select a from t10 where pk=12);
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
select * from t1 where a in (select a from t10 where pk=12);
a b
explain select * from t1 where a in (select a from t10 where pk=9);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t10 const PRIMARY PRIMARY 4 const 1
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
select * from t1 where a in (select a from t10 where pk=9);
a b
An empty table inside
explain select * from t1 where a in (select a from t11);
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
select * from t1 where a in (select a from t11);
a b
explain select * from t1 where a in (select pk from t10) and b in (select pk from t10);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index
select * from t1 where a in (select pk from t10) and b in (select pk from t10);
a b
0 0
1 1
2 2
flattening a nested subquery
explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where
1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using index
select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
a b
0 0
1 1
2 2
flattening subquery w/ several tables
explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a);
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 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where
1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where ((`test`.`t10`.`pk` = `test`.`t1`.`a`) and (`test`.`t12`.`pk` = `test`.`t10`.`a`))
subqueries within outer joins go into ON expr.
explAin extended
select * from t1 left join (t2 A, t2 B) on ( A.A= t1.A And B.A in (select pk from t10));
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
1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where
1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where
2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on(((`test`.`A`.`A` = `test`.`t1`.`A`) And <in_optimizer>(`test`.`B`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`B`.`A`) in t10 on PRIMARY))))) where 1
t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)"
explAin extended
select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10));
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
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where
2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on(((`test`.`t2`.`A` = `test`.`t1`.`A`) And <in_optimizer>(`test`.`t2`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`t2`.`A`) in t10 on PRIMARY))))) where 1
we shouldn't flatten if we're going to get a join of > MAX_TABLES.
explain select * from
t1 s00, t1 s01, t1 s02, t1 s03, t1 s04,t1 s05,t1 s06,t1 s07,t1 s08,t1 s09,
t1 s10, t1 s11, t1 s12, t1 s13, t1 s14,t1 s15,t1 s16,t1 s17,t1 s18,t1 s19,
t1 s20, t1 s21, t1 s22, t1 s23, t1 s24,t1 s25,t1 s26,t1 s27,t1 s28,t1 s29,
t1 s30, t1 s31, t1 s32, t1 s33, t1 s34,t1 s35,t1 s36,t1 s37,t1 s38,t1 s39,
t1 s40, t1 s41, t1 s42, t1 s43, t1 s44,t1 s45,t1 s46,t1 s47,t1 s48,t1 s49
where
s00.a in (
select m00.a from
t1 m00, t1 m01, t1 m02, t1 m03, t1 m04,t1 m05,t1 m06,t1 m07,t1 m08,t1 m09,
t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19
);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where
2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
select * from
t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10))
where t1.a < 5;
a b a b
0 0 0 0
1 1 1 1
2 2 2 2
prepare s1 from
' select * from
t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10))
where t1.a < 5';
execute s1;
a b a b
0 0 0 0
1 1 1 1
2 2 2 2
execute s1;
a b a b
0 0 0 0
1 1 1 1
2 2 2 2
insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B;
explain extended select * from t1 where a in (select pk from t10 where pk<3);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index
1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3))
BUG#37120 optimizer_switch allowable values not according to specification
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,table_elimination=on
set optimizer_switch='default,materialization=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on,table_elimination=on
set optimizer_switch='default,semijoin=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off,table_elimination=on
set optimizer_switch='default,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on,table_elimination=on
set optimizer_switch='default,semijoin=off,materialization=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,table_elimination=on
set optimizer_switch='default,materialization=off,semijoin=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,table_elimination=on
set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off,table_elimination=on
set optimizer_switch='default,semijoin=off,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off,table_elimination=on
set optimizer_switch='default,materialization=off,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on,table_elimination=on
set optimizer_switch=default;
drop table t0, t1, t2;
drop table t10, t11, t12;
Bug#37899: Wrongly checked optimization prerequisite caused failed
assertion.
CREATE TABLE t1 (
`pk` int(11),
`varchar_nokey` varchar(5)
);
INSERT INTO t1 VALUES
(1,'qk'),(2,'j'),(3,'aew');
SELECT *
FROM t1
WHERE varchar_nokey IN (
SELECT
varchar_nokey
FROM
t1
) XOR pk = 30;
pk varchar_nokey
1 qk
2 j
3 aew
drop table t1;
#
# BUG#41842: Semi-join materialization strategy crashes when the upper query has HAVING
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
int_nokey int(11) NOT NULL,
time_key time NOT NULL,
datetime_key datetime NOT NULL,
datetime_nokey datetime NOT NULL,
varchar_key varchar(1) NOT NULL,
varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY time_key (time_key),
KEY datetime_key (datetime_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t1 VALUES
(1,0, '00:16:10','2008-09-03 14:25:40','2008-09-03 14:25:40','h','h'),
(2,7, '00:00:00','2001-01-13 00:00:00','2001-01-13 00:00:00','',''),
(3,0, '00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'),
(4,2, '16:29:24','2000-10-16 01:39:08','2000-10-16 01:39:08','w','w'),
(5,1, '09:23:32','0000-00-00 00:00:00','0000-00-00 00:00:00','p','p'),
(6,3, '00:00:00','2007-12-02 00:00:00','2007-12-02 00:00:00','o','o'),
(7,3, '00:00:00','2008-09-11 00:00:00','2008-09-11 00:00:00','',''),
(8,0, '13:59:04','0000-00-00 00:00:00','0000-00-00 00:00:00','s','s'),
(9,7, '09:01:06','0000-00-00 00:00:00','0000-00-00 00:00:00','d','d'),
(10,5,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','n','n'),
(11,0,'21:06:46','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'),
(12,2,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','',''),
(13,6,'14:45:34','2003-07-28 02:34:08','2003-07-28 02:34:08','w','w'),
(14,1,'15:04:12','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'),
(15,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'),
(16,0,'15:55:23','2004-03-17 00:32:27','2004-03-17 00:32:27','p','p'),
(17,1,'16:30:00','2004-12-27 19:20:00','2004-12-27 19:20:00','d','d'),
(18,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','h','h'),
(19,0,'14:13:26','2008-11-09 05:53:48','2008-11-09 05:53:48','o','o'),
(20,0,'00:00:00','2009-10-11 06:58:04','2009-10-11 06:58:04','k','k');
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
int_nokey int(11) NOT NULL,
time_key time NOT NULL,
datetime_key datetime NOT NULL,
datetime_nokey datetime NOT NULL,
varchar_key varchar(1) NOT NULL,
varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY time_key (time_key),
KEY datetime_key (datetime_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t2 VALUES
(10,0,'19:39:13','0000-00-00 00:00:00','0000-00-00 00:00:00','g','g'),
(11,8,'03:43:53','0000-00-00 00:00:00','0000-00-00 00:00:00','b','b');
SELECT OUTR.datetime_nokey AS X FROM t1 AS OUTR
WHERE
OUTR.varchar_nokey IN (SELECT
INNR . varchar_nokey AS Y
FROM t2 AS INNR
WHERE
INNR . datetime_key >= INNR . time_key OR
INNR . pk = INNR . int_nokey
)
AND OUTR . varchar_nokey <= 'w'
HAVING X > '2012-12-12';
X
drop table t1, t2;
#
# Bug#45191: Incorrectly initialized semi-join led to a wrong result.
#
CREATE TABLE STAFF (EMPNUM CHAR(3) NOT NULL,
EMPNAME CHAR(20), GRADE DECIMAL(4), CITY CHAR(15));
CREATE TABLE PROJ (PNUM CHAR(3) NOT NULL,
PNAME CHAR(20), PTYPE CHAR(6),
BUDGET DECIMAL(9),
CITY CHAR(15));
CREATE TABLE WORKS (EMPNUM CHAR(3) NOT NULL,
PNUM CHAR(3) NOT NULL, HOURS DECIMAL(5));
INSERT INTO STAFF VALUES ('E1','Alice',12,'Deale');
INSERT INTO STAFF VALUES ('E2','Betty',10,'Vienna');
INSERT INTO STAFF VALUES ('E3','Carmen',13,'Vienna');
INSERT INTO STAFF VALUES ('E4','Don',12,'Deale');
INSERT INTO STAFF VALUES ('E5','Ed',13,'Akron');
INSERT INTO PROJ VALUES ('P1','MXSS','Design',10000,'Deale');
INSERT INTO PROJ VALUES ('P2','CALM','Code',30000,'Vienna');
INSERT INTO PROJ VALUES ('P3','SDP','Test',30000,'Tampa');
INSERT INTO PROJ VALUES ('P4','SDP','Design',20000,'Deale');
INSERT INTO PROJ VALUES ('P5','IRM','Test',10000,'Vienna');
INSERT INTO PROJ VALUES ('P6','PAYR','Design',50000,'Deale');
INSERT INTO WORKS VALUES ('E1','P1',40);
INSERT INTO WORKS VALUES ('E1','P2',20);
INSERT INTO WORKS VALUES ('E1','P3',80);
INSERT INTO WORKS VALUES ('E1','P4',20);
INSERT INTO WORKS VALUES ('E1','P5',12);
INSERT INTO WORKS VALUES ('E1','P6',12);
INSERT INTO WORKS VALUES ('E2','P1',40);
INSERT INTO WORKS VALUES ('E2','P2',80);
INSERT INTO WORKS VALUES ('E3','P2',20);
INSERT INTO WORKS VALUES ('E4','P2',20);
INSERT INTO WORKS VALUES ('E4','P4',40);
INSERT INTO WORKS VALUES ('E4','P5',80);
set optimizer_switch='default,materialization=off';
explain SELECT EMPNUM, EMPNAME
FROM STAFF
WHERE EMPNUM IN
(SELECT EMPNUM FROM WORKS
WHERE PNUM IN
(SELECT PNUM FROM PROJ));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY STAFF ALL NULL NULL NULL NULL 5
1 PRIMARY PROJ ALL NULL NULL NULL NULL 6
1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF)
SELECT EMPNUM, EMPNAME
FROM STAFF
WHERE EMPNUM IN
(SELECT EMPNUM FROM WORKS
WHERE PNUM IN
(SELECT PNUM FROM PROJ));
EMPNUM EMPNAME
E1 Alice
E2 Betty
E3 Carmen
E4 Don
set optimizer_switch='default';
drop table STAFF,WORKS,PROJ;
# End of bug#45191
#
# Bug#46550 Azalea returning duplicate results for some IN subqueries
# w/ semijoin=on
#
DROP TABLE IF EXISTS t0, t1, t2;
CREATE TABLE t0 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t0 VALUES
(1,'m','m'),
(40,'h','h'),
(1,'r','r'),
(1,'h','h'),
(9,'x','x'),
(NULL,'q','q'),
(NULL,'k','k'),
(7,'l','l'),
(182,'k','k'),
(202,'a','a'),
(7,'x','x'),
(6,'j','j'),
(119,'z','z'),
(4,'d','d'),
(5,'h','h'),
(1,'u','u'),
(3,'q','q'),
(7,'a','a'),
(3,'e','e'),
(6,'l','l');
CREATE TABLE t1 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t1 VALUES (7,NULL,NULL),(4,'x','x');
CREATE TABLE t2 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t2 VALUES (123,NULL,NULL);
SELECT int_key
FROM t0
WHERE varchar_nokey IN (
SELECT t1 .varchar_key from t1
);
int_key
9
7
SELECT t0.int_key
FROM t0
WHERE t0.varchar_nokey IN (
SELECT t1_1 .varchar_key
FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key
);
int_key
9
7
SELECT t0.int_key
FROM t0, t2
WHERE t0.varchar_nokey IN (
SELECT t1_1 .varchar_key
FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key
);
int_key
9
7
DROP TABLE t0, t1, t2;
# End of bug#46550
#
# Bug #46744 Crash in optimize_semijoin_nests on empty view
# with limit and procedure.
#
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
DROP PROCEDURE IF EXISTS p1;
CREATE TABLE t1 ( f1 int );
CREATE TABLE t2 ( f1 int );
insert into t2 values (5), (7);
CREATE OR REPLACE VIEW v1 AS SELECT * FROM t1 LIMIT 2;
create procedure p1()
select COUNT(*)
FROM v1 WHERE f1 IN
(SELECT f1 FROM t2 WHERE f1 = ANY (SELECT f1 FROM v1));
SET SESSION optimizer_switch = 'semijoin=on';
CALL p1();
COUNT(*)
0
SET SESSION optimizer_switch = 'semijoin=off';
CALL p1();
COUNT(*)
0
drop table t1, t2;
drop view v1;
drop procedure p1;
set SESSION optimizer_switch='default';
# End of bug#46744
Bug#46797 "Crash in fix_semijoin_strategies_for_picked_join_order
with semijoin=on"
CREATE TABLE t1 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
CREATE TABLE t2 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
INSERT INTO t2 VALUES
(NULL),(NULL),(NULL),(NULL),('a'),('a'),('a'),('b'),('b'),('b'),('b'),('c'),
('c'),('c'),('c'),('c'),('c'),('c'),('d'),('d'),('d'),('d'),('d'),('d'),('e'),
('e'),('e'),('e'),('e'),('e'),('f'),('f'),('f'),('g'),('g'),('h'),('h'),('h'),
('h'),('i'),('j'),('j'),('j'),('k'),('k'),('l'),('l'),('m'),('m'),('m'),('m'),
('n'),('n'),('n'),('o'),('o'),('o'),('p'),('p'),('p'),('q'),('q'),('q'),('r'),
('r'),('r'),('r'),('s'),('s'),('s'),('s'),('t'),('t'),('t'),('t'),('u'),('u'),
('u'),('u'),('v'),('v'),('v'),('v'),('w'),('w'),('w'),('w'),('w'),('w'),('x'),
('x'),('x'),('y'),('y'),('y'),('y'),('z'),('z'),('z'),('z');
CREATE TABLE t3 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t3 VALUES
(NULL),('c'),('d'),('e'),('f'),('h'),('j'),('k'),('k'),('m'),('m'),('m'),
('n'),('o'),('r'),('t'),('t'),('u'),('w'),('y');
SELECT varchar_key FROM t3
WHERE (SELECT varchar_key FROM t3
WHERE (varchar_key,varchar_key)
IN (SELECT t1.varchar_key, t2 .varchar_key
FROM t1 RIGHT JOIN t2 ON t1.varchar_key
)
);
varchar_key
DROP TABLE t1, t2, t3;
#
# Bug#46556 Returning incorrect, empty results for some IN subqueries
# w/semijoin=on
#
CREATE TABLE t0 (
pk INTEGER,
vkey VARCHAR(1),
vnokey VARCHAR(1),
PRIMARY KEY (pk),
KEY vkey(vkey)
);
INSERT INTO t0
VALUES (1,'g','g'), (2,'v','v'), (3,'t','t'), (4,'u','u'), (5,'n','n');
EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN
(SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where
1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 100.00 Using index; FirstMatch(t1)
Warnings:
Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where ((`test`.`t2`.`vkey` = `test`.`t1`.`vnokey`) and (`test`.`t1`.`pk` = `test`.`t0`.`pk`))
SELECT vkey FROM t0 WHERE pk IN
(SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey);
vkey
g
v
t
u
n
DROP TABLE t0;
# End of bug#46556
Bug #48073 Subquery on char columns from view crashes Mysql
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
CREATE TABLE t1 (
city VARCHAR(50) NOT NULL,
country_id SMALLINT UNSIGNED NOT NULL
);
INSERT INTO t1 VALUES
('Batna',2),
('Bchar',2),
('Skikda',2),
('Tafuna',3),
('Algeria',2) ;
CREATE TABLE t2 (
country_id SMALLINT UNSIGNED NOT NULL,
country VARCHAR(50) NOT NULL
);
INSERT INTO t2 VALUES
(2,'Algeria'),
(3,'American Samoa') ;
CREATE VIEW v1 AS
SELECT country_id, country
FROM t2
WHERE LEFT(country,1) = "A"
;
SELECT city, country_id
FROM t1
WHERE city IN (
SELECT country
FROM t2
WHERE LEFT(country, 1) = "A"
);
city country_id
Algeria 2
SELECT city, country_id
FROM t1
WHERE city IN (
SELECT country
FROM v1
);
city country_id
Algeria 2
drop table t1, t2;
drop view v1;
# End of bug#48073
Bug#48834: Procedure with view + subquery + semijoin=on
crashes on second call.
SET SESSION optimizer_switch ='semijoin=on';
CREATE TABLE t1 ( t1field integer, primary key (t1field));
CREATE TABLE t2 ( t2field integer, primary key (t2field));
CREATE VIEW v1 AS
SELECT t1field as v1field
FROM t1 A
WHERE A.t1field IN (SELECT t1field FROM t2 );
CREATE VIEW v2 AS
SELECT t2field as v2field
FROM t2 A
WHERE A.t2field IN (SELECT t2field FROM t2 );
CREATE PROCEDURE p1 ()
BEGIN
SELECT v1field
FROM v1
WHERE v1field IN ( SELECT v2field as vf_inner FROM v2 );
END|
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (2),(3),(4);
CALL p1;
v1field
2
3
CALL p1;
v1field
2
3
DROP TABLE t1,t2;
DROP VIEW v1,v2;
DROP PROCEDURE p1;
set SESSION optimizer_switch='default';
# End of BUG#48834
Bug#49097 subquery with view generates wrong result with
non-prepared statement
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
CREATE TABLE t1 (
city VARCHAR(50) NOT NULL,
country_id SMALLINT UNSIGNED NOT NULL
);
INSERT INTO t1 VALUES
('Batna',2),
('Bchar',2),
('Skikda',2),
('Tafuna',3),
('Algeria',2) ;
CREATE TABLE t2 (
country_id SMALLINT UNSIGNED NOT NULL,
country VARCHAR(50) NOT NULL
);
INSERT INTO t2 VALUES
(2,'Algeria'),
(3,'XAmerican Samoa') ;
CREATE VIEW v1 AS
SELECT country_id, country
FROM t2
WHERE LEFT(country,1) = "A"
;
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id
FROM t2
WHERE LEFT(country,1) = "A"
);
city country_id
Batna 2
Bchar 2
Skikda 2
Algeria 2
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id
FROM v1
);
city country_id
Batna 2
Bchar 2
Skikda 2
Algeria 2
PREPARE stmt FROM
"
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id
FROM v1
);
";
execute stmt;
city country_id
Batna 2
Bchar 2
Skikda 2
Algeria 2
deallocate prepare stmt;
drop table t1, t2;
drop view v1;
# End of Bug#49097
#
# BUG#38075: Wrong result: rows matching a subquery with outer join not returned
#
DROP TABLE IF EXISTS ot1, it1, it2;
CREATE TABLE it2 (
int_key int(11) NOT NULL,
datetime_key datetime NOT NULL,
KEY int_key (int_key),
KEY datetime_key (datetime_key)
);
INSERT INTO it2 VALUES
(5,'2002-04-10 14:25:30'), (0,'0000-00-00 00:00:00'),
(0,'2006-09-14 04:01:02'), (4,'0000-00-00 00:00:00'),
(8,'0000-00-00 00:00:00'), (5,'0000-00-00 00:00:00'),
(9,'0000-00-00 00:00:00'), (8,'2007-04-01 11:04:17'),
(1,'0000-00-00 00:00:00'), (7,'2009-01-12 00:00:00'),
(0,'2009-06-05 00:00:00'), (3,'2006-02-14 18:06:35'),
(5,'2006-02-21 07:08:16'), (0,'0000-00-00 00:00:00'),
(7,'0000-00-00 00:00:00'), (0,'0000-00-00 00:00:00'),
(0,'2007-02-13 00:00:00'), (1,'0000-00-00 00:00:00'),
(0,'0000-00-00 00:00:00'), (1,'2003-08-11 00:00:00');
CREATE TABLE ot1 (
int_nokey int(11) NOT NULL,
int_key int(11) NOT NULL,
KEY int_key (int_key)
);
INSERT INTO ot1 VALUES
(5,0), (3,0), (0,2), (3,0), (1,3), (0,0), (1,7), (7,0), (1,7), (0,7),
(0,9), (8,2), (4,4), (9,3), (0,9), (2,5), (0,5), (8,0), (5,8), (1,5);
CREATE TABLE it1 (
int_nokey int(11) NOT NULL,
int_key int(11) NOT NULL,
KEY int_key (int_key)
);
INSERT INTO it1 VALUES
(9,5), (0,4);
SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
int_key
0
0
2
0
3
0
7
0
7
7
9
2
9
5
0
8
5
EXPLAIN
SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY it1 index NULL int_key 4 NULL 2 Using index; Start temporary
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer
1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary
DROP TABLE ot1, it1, it2;
# End of BUG#38075

716
mysql-test/r/subselect_sj2.result Normal file
View File

@@ -0,0 +1,716 @@
drop table if exists t0, t1, t2, t3;
drop view if exists v1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
a int,
b int
);
insert into t1 values (1,1),(1,1),(2,2);
create table t2 (
a int,
b int,
key(b)
);
insert into t2 select a, a/2 from t0;
select * from t1;
a b
1 1
1 1
2 2
select * from t2;
a b
0 0
1 1
2 1
3 2
4 2
5 3
6 3
7 4
8 4
9 5
explain select * from t2 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Materialize; Scan
1 PRIMARY t2 ref b b 5 test.t1.a 2
select * from t2 where b in (select a from t1);
a b
1 1
2 1
3 2
4 2
create table t3 (
a int,
b int,
key(b),
pk1 char(200), pk2 char(200), pk3 char(200),
primary key(pk1, pk2, pk3)
) engine=innodb;
insert into t3 select a,a, a,a,a from t0;
explain select * from t3 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL b NULL NULL NULL 10
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(t3)
select * from t3 where b in (select a from t1);
a b pk1 pk2 pk3
1 1 1 1 1
2 2 2 2 2
set @save_max_heap_table_size= @@max_heap_table_size;
set max_heap_table_size=16384;
set @save_join_buffer_size = @@join_buffer_size;
set join_buffer_size= 8000;
drop table t3;
create table t3 (
a int,
b int,
key(b),
pk1 char(200), pk2 char(200),
primary key(pk1, pk2)
) engine=innodb;
insert into t3 select
A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
from t0 A, t0 B where B.a <5;
explain select * from t3 where b in (select a from t0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Using where; Materialize; Scan
1 PRIMARY t3 ref b b 5 test.t0.a 1
set @save_ecp= @@engine_condition_pushdown;
set engine_condition_pushdown=0;
select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5);
a b pk1 pk2
0 0 0 0
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
5 5 5 5
6 6 6 6
7 7 7 7
8 8 8 8
9 9 9 9
10 10 10 10
11 11 11 11
12 12 12 12
13 13 13 13
set engine_condition_pushdown=@save_ecp;
set join_buffer_size= @save_join_buffer_size;
set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY t2 index b b 5 NULL 10 Using index; Materialize
select * from t1;
a b
1 1
1 1
2 2
select * from t1 where a in (select b from t2);
a b
1 1
1 1
2 2
drop table t1, t2, t3;
set @save_join_buffer_size = @@join_buffer_size;
set join_buffer_size= 8000;
create table t1 (a int, filler1 binary(200), filler2 binary(200));
insert into t1 select a, 'filler123456', 'filler123456' from t0;
insert into t1 select a+10, 'filler123456', 'filler123456' from t0;
create table t2 as select * from t1;
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
insert into t1 values (2, 'duplicate ok', 'duplicate ok');
insert into t1 values (18, 'duplicate ok', 'duplicate ok');
insert into t2 values (3, 'duplicate ok', 'duplicate ok');
insert into t2 values (19, 'duplicate ok', 'duplicate ok');
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY it ALL NULL NULL NULL NULL 22 Materialize; Scan
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
a mid(filler1, 1,10) Z
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
2 duplicate 1
18 duplicate 1
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY it ALL NULL NULL NULL NULL 32 Materialize
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
a mid(filler1, 1,10) length(filler1)=length(filler2)
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
3 duplicate 1
19 duplicate 1
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY it ALL NULL NULL NULL NULL 22 Materialize; Scan
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
a mid(filler1, 1,10) Z
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
2 duplicate 1
18 duplicate 1
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY it ALL NULL NULL NULL NULL 52 Materialize
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
a mid(filler1, 1,10) length(filler1)=length(filler2)
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
3 duplicate 1
19 duplicate 1
drop table t1, t2;
create table t1 (a int, b int, key(a));
create table t2 (a int, b int, key(a));
create table t3 (a int, b int, key(a));
insert into t1 select a,a from t0;
insert into t2 select a,a from t0;
insert into t3 select a,a from t0;
t2 and t3 must be use 'ref', not 'ALL':
explain select *
from t0 where a in
(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 10
1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Start temporary; Using join buffer
1 PRIMARY t2 ref a a 5 test.t1.a 1 Using index
1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary
drop table t0, t1,t2,t3;
CREATE TABLE t1 (
ID int(11) NOT NULL auto_increment,
Name char(35) NOT NULL default '',
Country char(3) NOT NULL default '',
Population int(11) NOT NULL default '0',
PRIMARY KEY (ID),
INDEX (Population),
INDEX (Country)
);
CREATE TABLE t2 (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
Population int(11) NOT NULL default '0',
Capital int(11) default NULL,
PRIMARY KEY (Code),
UNIQUE INDEX (Name),
INDEX (Population)
);
CREATE TABLE t3 (
Country char(3) NOT NULL default '',
Language char(30) NOT NULL default '',
Percentage float(3,1) NOT NULL default '0.0',
PRIMARY KEY (Country, Language),
INDEX (Percentage)
);
EXPLAIN
SELECT Name FROM t2
WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000)
AND
t2.Code IN (SELECT Country FROM t3
WHERE Language='English' AND Percentage > 10 AND
t2.Population > 100000);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range Population,Country Population 4 NULL 1 Using index condition; Using MRR
1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where
1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t3.Country 1 Using index condition; Using where
DROP TABLE t1,t2,t3;
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 '',
PRIMARY KEY (Code)
);
CREATE TABLE t2 (
ID int(11) NOT NULL AUTO_INCREMENT,
Name char(35) NOT NULL DEFAULT '',
CountryCode char(3) NOT NULL DEFAULT '',
District char(20) NOT NULL DEFAULT '',
Population int(11) NOT NULL DEFAULT '0',
PRIMARY KEY (ID),
KEY CountryCode (CountryCode)
);
Fill the table with test data
This must not use LooseScan:
EXPLAIN SELECT Name FROM t1
WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
1 PRIMARY t2 ALL CountryCode NULL NULL NULL 545 Using where; Materialize
SELECT Name FROM t1
WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
Name
Austria
Canada
China
Czech Republic
drop table t1, t2;
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
CREATE PROCEDURE p1(v1 int)
BEGIN
SELECT 1 FROM t1 WHERE a = v1 AND a IN (SELECT c FROM t2);
END
//
CREATE PROCEDURE p2(v1 int)
BEGIN
SELECT 1 FROM t1 WHERE a IN (SELECT c FROM t2);
END
//
CREATE PROCEDURE p3(v1 int)
BEGIN
SELECT 1
FROM
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
t1 t57,t1 t58,t1 t59,t1 t60
WHERE t01.a IN (SELECT c FROM t2);
END
//
CREATE PROCEDURE p4(v1 int)
BEGIN
SELECT 1
FROM
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
t1 t57,t1 t58,t1 t59,t1 t60
WHERE t01.a = v1 AND t01.a IN (SELECT c FROM t2);
END
//
CALL p1(1);
1
CALL p2(1);
1
CALL p3(1);
1
CALL p4(1);
1
DROP TABLE t1, t2;
DROP PROCEDURE p1;
DROP PROCEDURE p2;
DROP PROCEDURE p3;
DROP PROCEDURE p4;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4);
create table t1 (a int, b int, key(a));
insert into t1 select a,a from t0;
create table t2 (a int, b int, primary key(a));
insert into t2 select * from t1;
Table t2, unlike table t1, should be displayed as pulled out
explain extended select * from t0
where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
t1.b=t2.b);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Start temporary
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary
Warnings:
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t1`.`a` = `test`.`t0`.`a`) and (`test`.`t2`.`a` = `test`.`t0`.`a`))
update t1 set a=3, b=11 where a=4;
update t2 set b=11 where a=3;
select * from t0 where t0.a in
(select t1.a from t1, t2 where t2.a=t0.a and t1.b=t2.b);
a
0
1
2
3
drop table t0, t1, t2;
CREATE TABLE t1 (
id int(11) NOT NULL,
PRIMARY KEY (id));
CREATE TABLE t2 (
id int(11) NOT NULL,
fid int(11) NOT NULL,
PRIMARY KEY (id));
insert into t1 values(1);
insert into t2 values(1,7503),(2,1);
explain select count(*)
from t1
where fid IN (select fid from t2 where (id between 7502 and 8420) order by fid );
ERROR 42S22: Unknown column 'fid' in 'IN/ALL/ANY subquery'
drop table t1, t2;
create table t1 (a int, b int, key (a), key (b));
insert into t1 values (2,4),(2,4),(2,4);
select t1.a from t1
where
t1.a in (select 1 from t1 where t1.a in (select 1 from t1) group by t1.a);
a
drop table t1;
create table t1(a int,b int,key(a),key(b));
insert into t1 values (1,1),(2,2),(3,3);
select 1 from t1
where t1.a not in (select 1 from t1
where t1.a in (select 1 from t1)
group by t1.b);
1
1
1
drop table t1;
CREATE TABLE t1
(EMPNUM CHAR(3) NOT NULL,
EMPNAME CHAR(20),
GRADE DECIMAL(4),
CITY CHAR(15));
CREATE TABLE t2
(PNUM CHAR(3) NOT NULL,
PNAME CHAR(20),
PTYPE CHAR(6),
BUDGET DECIMAL(9),
CITY CHAR(15));
CREATE TABLE t3
(EMPNUM CHAR(3) NOT NULL,
PNUM CHAR(3) NOT NULL,
HOURS DECIMAL(5));
INSERT INTO t1 VALUES ('E1','Alice',12,'Deale');
INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna');
INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna');
INSERT INTO t1 VALUES ('E4','Don',12,'Deale');
INSERT INTO t1 VALUES ('E5','Ed',13,'Akron');
INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale');
INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna');
INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa');
INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale');
INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna');
INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale');
INSERT INTO t3 VALUES ('E1','P1',40);
INSERT INTO t3 VALUES ('E1','P2',20);
INSERT INTO t3 VALUES ('E1','P3',80);
INSERT INTO t3 VALUES ('E1','P4',20);
INSERT INTO t3 VALUES ('E1','P5',12);
INSERT INTO t3 VALUES ('E1','P6',12);
INSERT INTO t3 VALUES ('E2','P1',40);
INSERT INTO t3 VALUES ('E2','P2',80);
INSERT INTO t3 VALUES ('E3','P2',20);
INSERT INTO t3 VALUES ('E4','P2',20);
INSERT INTO t3 VALUES ('E4','P4',40);
INSERT INTO t3 VALUES ('E4','P5',80);
SELECT * FROM t1;
EMPNUM EMPNAME GRADE CITY
E1 Alice 12 Deale
E2 Betty 10 Vienna
E3 Carmen 13 Vienna
E4 Don 12 Deale
E5 Ed 13 Akron
CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM);
SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
EMPNAME
Alice
Betty
Don
DROP INDEX t1_IDX ON t1;
CREATE INDEX t1_IDX ON t1(EMPNUM);
SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
EMPNAME
Alice
Betty
Don
DROP INDEX t1_IDX ON t1;
SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
EMPNAME
Alice
Betty
Don
DROP TABLE t1, t2, t3;
CREATE TABLE t1 (f1 INT NOT NULL);
CREATE VIEW v1 (a) AS SELECT f1 IN (SELECT f1 FROM t1) FROM t1;
SELECT * FROM v1;
a
drop view v1;
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int, b int);
insert into t1 values (0,0),(1,1),(2,2);
create table t2 as select * from t1;
create table t3 (pk int, a int, primary key(pk));
insert into t3 select a,a from t0;
explain
select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where
2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index
drop table t0, t1, t2, t3;
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a char(200), b char(200), c char(200), primary key (a,b,c)) engine=innodb;
insert into t2 select concat(a, repeat('X',198)),repeat('B',200),repeat('B',200) from t1;
insert into t2 select concat(a, repeat('Y',198)),repeat('B',200),repeat('B',200) from t1;
alter table t2 add filler1 int;
insert into t1 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C;
set @save_join_buffer_size=@@join_buffer_size;
set join_buffer_size=1;
select * from t2 where filler1 in ( select a from t1);
a b c filler1
set join_buffer_size=default;
drop table t1, t2;
create table t1 (a int not null);
drop procedure if exists p1;
CREATE PROCEDURE p1()
BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION select a from t1;
prepare s1 from '
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in ( select a from t1)
)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))';
execute s1;
END;
|
call p1();
a
drop procedure p1;
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int) as select A.a + 10 *(B.a + 10*C.a) as a from t0 A, t0 B, t0 C;
create table t2 (id int, a int, primary key(id), key(a)) as select a as id, a as a from t1;
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`id` int(11) NOT NULL DEFAULT '0',
`a` int(11) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `a` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
set @a=0;
create table t3 as select * from t2 limit 0;
insert into t3 select @a:=@a+1, t2.a from t2, t0;
insert into t3 select @a:=@a+1, t2.a from t2, t0;
insert into t3 select @a:=@a+1, t2.a from t2, t0;
alter table t3 add primary key(id), add key(a);
The following must use loose index scan over t3, key a:
explain select count(a) from t2 where a in ( SELECT a FROM t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index a a 5 NULL 1000 Using index
1 PRIMARY t3 index a a 5 NULL 30000 Using index; Materialize
select count(a) from t2 where a in ( SELECT a FROM t3);
count(a)
1000
drop table t0,t1,t2,t3;
BUG#42740: crash in optimize_semijoin_nests
create table t1 (c6 timestamp,key (c6)) engine=innodb;
create table t2 (c2 double) engine=innodb;
explain select 1 from t2 where c2 = any (select log10(null) from t1 where c6 <null) ;
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
drop table t1, t2;
#
# BUG#42742: crash in setup_sj_materialization, Copy_field::set
#
create table t3 ( c1 year) engine=innodb;
insert into t3 values (2135),(2142);
create table t2 (c1 tinytext,c2 text,c6 timestamp) engine=innodb;
# The following must not crash, EXPLAIN should show one SJ strategy, not a mix:
explain select 1 from t2 where
c2 in (select 1 from t3, t2) and
c1 in (select convert(c6,char(1)) from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2)
drop table t2, t3;

723
mysql-test/r/subselect_sj2_jcl6.result Normal file
View File

@@ -0,0 +1,723 @@
set join_cache_level=6;
show variables like 'join_cache_level';
Variable_name Value
join_cache_level 6
drop table if exists t0, t1, t2, t3;
drop view if exists v1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
a int,
b int
);
insert into t1 values (1,1),(1,1),(2,2);
create table t2 (
a int,
b int,
key(b)
);
insert into t2 select a, a/2 from t0;
select * from t1;
a b
1 1
1 1
2 2
select * from t2;
a b
0 0
1 1
2 1
3 2
4 2
5 3
6 3
7 4
8 4
9 5
explain select * from t2 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Materialize; Scan
1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer
select * from t2 where b in (select a from t1);
a b
1 1
2 1
3 2
4 2
create table t3 (
a int,
b int,
key(b),
pk1 char(200), pk2 char(200), pk3 char(200),
primary key(pk1, pk2, pk3)
) engine=innodb;
insert into t3 select a,a, a,a,a from t0;
explain select * from t3 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL b NULL NULL NULL 10
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(t3); Using join buffer
select * from t3 where b in (select a from t1);
a b pk1 pk2 pk3
1 1 1 1 1
2 2 2 2 2
set @save_max_heap_table_size= @@max_heap_table_size;
set max_heap_table_size=16384;
set @save_join_buffer_size = @@join_buffer_size;
set join_buffer_size= 8000;
drop table t3;
create table t3 (
a int,
b int,
key(b),
pk1 char(200), pk2 char(200),
primary key(pk1, pk2)
) engine=innodb;
insert into t3 select
A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
from t0 A, t0 B where B.a <5;
explain select * from t3 where b in (select a from t0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Using where; Materialize; Scan
1 PRIMARY t3 ref b b 5 test.t0.a 1
set @save_ecp= @@engine_condition_pushdown;
set engine_condition_pushdown=0;
select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5);
a b pk1 pk2
0 0 0 0
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
5 5 5 5
6 6 6 6
7 7 7 7
8 8 8 8
9 9 9 9
10 10 10 10
11 11 11 11
12 12 12 12
13 13 13 13
set engine_condition_pushdown=@save_ecp;
set join_buffer_size= @save_join_buffer_size;
set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY t2 index b b 5 NULL 10 Using index; Materialize
select * from t1;
a b
1 1
1 1
2 2
select * from t1 where a in (select b from t2);
a b
1 1
1 1
2 2
drop table t1, t2, t3;
set @save_join_buffer_size = @@join_buffer_size;
set join_buffer_size= 8000;
create table t1 (a int, filler1 binary(200), filler2 binary(200));
insert into t1 select a, 'filler123456', 'filler123456' from t0;
insert into t1 select a+10, 'filler123456', 'filler123456' from t0;
create table t2 as select * from t1;
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
insert into t1 values (2, 'duplicate ok', 'duplicate ok');
insert into t1 values (18, 'duplicate ok', 'duplicate ok');
insert into t2 values (3, 'duplicate ok', 'duplicate ok');
insert into t2 values (19, 'duplicate ok', 'duplicate ok');
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY it ALL NULL NULL NULL NULL 22 Materialize; Scan
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
a mid(filler1, 1,10) Z
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
2 duplicate 1
18 duplicate 1
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY it ALL NULL NULL NULL NULL 32 Materialize
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
a mid(filler1, 1,10) length(filler1)=length(filler2)
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
3 duplicate 1
19 duplicate 1
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY it ALL NULL NULL NULL NULL 22 Materialize; Scan
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
a mid(filler1, 1,10) Z
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
2 duplicate 1
18 duplicate 1
explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY it ALL NULL NULL NULL NULL 52 Materialize
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
a mid(filler1, 1,10) length(filler1)=length(filler2)
0 filler1234 1
1 filler1234 1
2 filler1234 1
3 filler1234 1
4 filler1234 1
5 filler1234 1
6 filler1234 1
7 filler1234 1
8 filler1234 1
9 filler1234 1
10 filler1234 1
11 filler1234 1
12 filler1234 1
13 filler1234 1
14 filler1234 1
15 filler1234 1
16 filler1234 1
17 filler1234 1
18 filler1234 1
19 filler1234 1
3 duplicate 1
19 duplicate 1
drop table t1, t2;
create table t1 (a int, b int, key(a));
create table t2 (a int, b int, key(a));
create table t3 (a int, b int, key(a));
insert into t1 select a,a from t0;
insert into t2 select a,a from t0;
insert into t3 select a,a from t0;
t2 and t3 must be use 'ref', not 'ALL':
explain select *
from t0 where a in
(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 10
1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Start temporary; Using join buffer
1 PRIMARY t2 ref a a 5 test.t1.a 1 Using index
1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary
drop table t0, t1,t2,t3;
CREATE TABLE t1 (
ID int(11) NOT NULL auto_increment,
Name char(35) NOT NULL default '',
Country char(3) NOT NULL default '',
Population int(11) NOT NULL default '0',
PRIMARY KEY (ID),
INDEX (Population),
INDEX (Country)
);
CREATE TABLE t2 (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
Population int(11) NOT NULL default '0',
Capital int(11) default NULL,
PRIMARY KEY (Code),
UNIQUE INDEX (Name),
INDEX (Population)
);
CREATE TABLE t3 (
Country char(3) NOT NULL default '',
Language char(30) NOT NULL default '',
Percentage float(3,1) NOT NULL default '0.0',
PRIMARY KEY (Country, Language),
INDEX (Percentage)
);
EXPLAIN
SELECT Name FROM t2
WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000)
AND
t2.Code IN (SELECT Country FROM t3
WHERE Language='English' AND Percentage > 10 AND
t2.Population > 100000);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range Population,Country Population 4 NULL 1 Using index condition; Using MRR
1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where; Using join buffer
1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t3.Country 1 Using index condition(BKA); Using where; Using join buffer
DROP TABLE t1,t2,t3;
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 '',
PRIMARY KEY (Code)
);
CREATE TABLE t2 (
ID int(11) NOT NULL AUTO_INCREMENT,
Name char(35) NOT NULL DEFAULT '',
CountryCode char(3) NOT NULL DEFAULT '',
District char(20) NOT NULL DEFAULT '',
Population int(11) NOT NULL DEFAULT '0',
PRIMARY KEY (ID),
KEY CountryCode (CountryCode)
);
Fill the table with test data
This must not use LooseScan:
EXPLAIN SELECT Name FROM t1
WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
1 PRIMARY t2 ALL CountryCode NULL NULL NULL 545 Using where; Materialize
SELECT Name FROM t1
WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
Name
Austria
Canada
China
Czech Republic
drop table t1, t2;
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
CREATE PROCEDURE p1(v1 int)
BEGIN
SELECT 1 FROM t1 WHERE a = v1 AND a IN (SELECT c FROM t2);
END
//
CREATE PROCEDURE p2(v1 int)
BEGIN
SELECT 1 FROM t1 WHERE a IN (SELECT c FROM t2);
END
//
CREATE PROCEDURE p3(v1 int)
BEGIN
SELECT 1
FROM
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
t1 t57,t1 t58,t1 t59,t1 t60
WHERE t01.a IN (SELECT c FROM t2);
END
//
CREATE PROCEDURE p4(v1 int)
BEGIN
SELECT 1
FROM
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
t1 t57,t1 t58,t1 t59,t1 t60
WHERE t01.a = v1 AND t01.a IN (SELECT c FROM t2);
END
//
CALL p1(1);
1
CALL p2(1);
1
CALL p3(1);
1
CALL p4(1);
1
DROP TABLE t1, t2;
DROP PROCEDURE p1;
DROP PROCEDURE p2;
DROP PROCEDURE p3;
DROP PROCEDURE p4;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4);
create table t1 (a int, b int, key(a));
insert into t1 select a,a from t0;
create table t2 (a int, b int, primary key(a));
insert into t2 select * from t1;
Table t2, unlike table t1, should be displayed as pulled out
explain extended select * from t0
where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
t1.b=t2.b);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Start temporary; Using join buffer
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary; Using join buffer
Warnings:
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t1`.`a` = `test`.`t0`.`a`) and (`test`.`t2`.`a` = `test`.`t0`.`a`))
update t1 set a=3, b=11 where a=4;
update t2 set b=11 where a=3;
# The following query gives wrong result due to Bug#49129
select * from t0 where t0.a in
(select t1.a from t1, t2 where t2.a=t0.a and t1.b=t2.b);
a
0
drop table t0, t1, t2;
CREATE TABLE t1 (
id int(11) NOT NULL,
PRIMARY KEY (id));
CREATE TABLE t2 (
id int(11) NOT NULL,
fid int(11) NOT NULL,
PRIMARY KEY (id));
insert into t1 values(1);
insert into t2 values(1,7503),(2,1);
explain select count(*)
from t1
where fid IN (select fid from t2 where (id between 7502 and 8420) order by fid );
ERROR 42S22: Unknown column 'fid' in 'IN/ALL/ANY subquery'
drop table t1, t2;
create table t1 (a int, b int, key (a), key (b));
insert into t1 values (2,4),(2,4),(2,4);
select t1.a from t1
where
t1.a in (select 1 from t1 where t1.a in (select 1 from t1) group by t1.a);
a
drop table t1;
create table t1(a int,b int,key(a),key(b));
insert into t1 values (1,1),(2,2),(3,3);
select 1 from t1
where t1.a not in (select 1 from t1
where t1.a in (select 1 from t1)
group by t1.b);
1
1
1
drop table t1;
CREATE TABLE t1
(EMPNUM CHAR(3) NOT NULL,
EMPNAME CHAR(20),
GRADE DECIMAL(4),
CITY CHAR(15));
CREATE TABLE t2
(PNUM CHAR(3) NOT NULL,
PNAME CHAR(20),
PTYPE CHAR(6),
BUDGET DECIMAL(9),
CITY CHAR(15));
CREATE TABLE t3
(EMPNUM CHAR(3) NOT NULL,
PNUM CHAR(3) NOT NULL,
HOURS DECIMAL(5));
INSERT INTO t1 VALUES ('E1','Alice',12,'Deale');
INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna');
INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna');
INSERT INTO t1 VALUES ('E4','Don',12,'Deale');
INSERT INTO t1 VALUES ('E5','Ed',13,'Akron');
INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale');
INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna');
INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa');
INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale');
INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna');
INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale');
INSERT INTO t3 VALUES ('E1','P1',40);
INSERT INTO t3 VALUES ('E1','P2',20);
INSERT INTO t3 VALUES ('E1','P3',80);
INSERT INTO t3 VALUES ('E1','P4',20);
INSERT INTO t3 VALUES ('E1','P5',12);
INSERT INTO t3 VALUES ('E1','P6',12);
INSERT INTO t3 VALUES ('E2','P1',40);
INSERT INTO t3 VALUES ('E2','P2',80);
INSERT INTO t3 VALUES ('E3','P2',20);
INSERT INTO t3 VALUES ('E4','P2',20);
INSERT INTO t3 VALUES ('E4','P4',40);
INSERT INTO t3 VALUES ('E4','P5',80);
SELECT * FROM t1;
EMPNUM EMPNAME GRADE CITY
E1 Alice 12 Deale
E2 Betty 10 Vienna
E3 Carmen 13 Vienna
E4 Don 12 Deale
E5 Ed 13 Akron
CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM);
SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
EMPNAME
Alice
Betty
Don
DROP INDEX t1_IDX ON t1;
CREATE INDEX t1_IDX ON t1(EMPNUM);
SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
EMPNAME
Alice
Betty
Don
DROP INDEX t1_IDX ON t1;
SELECT EMPNAME
FROM t1
WHERE EMPNUM IN
(SELECT EMPNUM
FROM t3
WHERE PNUM IN
(SELECT PNUM
FROM t2
WHERE PTYPE = 'Design'));
EMPNAME
Alice
Betty
Don
DROP TABLE t1, t2, t3;
CREATE TABLE t1 (f1 INT NOT NULL);
CREATE VIEW v1 (a) AS SELECT f1 IN (SELECT f1 FROM t1) FROM t1;
SELECT * FROM v1;
a
drop view v1;
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int, b int);
insert into t1 values (0,0),(1,1),(2,2);
create table t2 as select * from t1;
create table t3 (pk int, a int, primary key(pk));
insert into t3 select a,a from t0;
explain
select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index
drop table t0, t1, t2, t3;
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a char(200), b char(200), c char(200), primary key (a,b,c)) engine=innodb;
insert into t2 select concat(a, repeat('X',198)),repeat('B',200),repeat('B',200) from t1;
insert into t2 select concat(a, repeat('Y',198)),repeat('B',200),repeat('B',200) from t1;
alter table t2 add filler1 int;
insert into t1 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C;
set @save_join_buffer_size=@@join_buffer_size;
set join_buffer_size=1;
select * from t2 where filler1 in ( select a from t1);
a b c filler1
set join_buffer_size=default;
drop table t1, t2;
create table t1 (a int not null);
drop procedure if exists p1;
CREATE PROCEDURE p1()
BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION select a from t1;
prepare s1 from '
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in (
select a from t1 where a in ( select a from t1)
)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))';
execute s1;
END;
|
call p1();
a
drop procedure p1;
drop table t1;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int) as select A.a + 10 *(B.a + 10*C.a) as a from t0 A, t0 B, t0 C;
create table t2 (id int, a int, primary key(id), key(a)) as select a as id, a as a from t1;
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`id` int(11) NOT NULL DEFAULT '0',
`a` int(11) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `a` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
set @a=0;
create table t3 as select * from t2 limit 0;
insert into t3 select @a:=@a+1, t2.a from t2, t0;
insert into t3 select @a:=@a+1, t2.a from t2, t0;
insert into t3 select @a:=@a+1, t2.a from t2, t0;
alter table t3 add primary key(id), add key(a);
The following must use loose index scan over t3, key a:
explain select count(a) from t2 where a in ( SELECT a FROM t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index a a 5 NULL 1000 Using index
1 PRIMARY t3 index a a 5 NULL 30000 Using index; Materialize
select count(a) from t2 where a in ( SELECT a FROM t3);
count(a)
1000
drop table t0,t1,t2,t3;
BUG#42740: crash in optimize_semijoin_nests
create table t1 (c6 timestamp,key (c6)) engine=innodb;
create table t2 (c2 double) engine=innodb;
explain select 1 from t2 where c2 = any (select log10(null) from t1 where c6 <null) ;
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
drop table t1, t2;
#
# BUG#42742: crash in setup_sj_materialization, Copy_field::set
#
create table t3 ( c1 year) engine=innodb;
insert into t3 values (2135),(2142);
create table t2 (c1 tinytext,c2 text,c6 timestamp) engine=innodb;
# The following must not crash, EXPLAIN should show one SJ strategy, not a mix:
explain select 1 from t2 where
c2 in (select 1 from t3, t2) and
c1 in (select convert(c6,char(1)) from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2)
drop table t2, t3;
set join_cache_level=default;
show variables like 'join_cache_level';
Variable_name Value
join_cache_level 1

789
mysql-test/r/subselect_sj_jcl6.result Normal file
View File

@@ -0,0 +1,789 @@
set join_cache_level=6;
show variables like 'join_cache_level';
Variable_name Value
join_cache_level 6
drop table if exists t0, t1, t2, t10, t11, t12;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int, b int);
insert into t1 values (0,0),(1,1),(2,2);
create table t2 as select * from t1;
create table t11(a int, b int);
create table t10 (pk int, a int, primary key(pk));
insert into t10 select a,a from t0;
create table t12 like t10;
insert into t12 select * from t10;
Flattened because of dependency, t10=func(t1)
explain select * from t1 where a in (select pk from t10);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
select * from t1 where a in (select pk from t10);
a b
0 0
1 1
2 2
A confluent case of dependency
explain select * from t1 where a in (select a from t10 where pk=12);
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
select * from t1 where a in (select a from t10 where pk=12);
a b
explain select * from t1 where a in (select a from t10 where pk=9);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t10 const PRIMARY PRIMARY 4 const 1
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
select * from t1 where a in (select a from t10 where pk=9);
a b
An empty table inside
explain select * from t1 where a in (select a from t11);
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
select * from t1 where a in (select a from t11);
a b
explain select * from t1 where a in (select pk from t10) and b in (select pk from t10);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index
select * from t1 where a in (select pk from t10) and b in (select pk from t10);
a b
0 0
1 1
2 2
flattening a nested subquery
explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer
1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using index
select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
a b
0 0
1 1
2 2
flattening subquery w/ several tables
explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a);
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 Using where
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where; Using join buffer
1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where ((`test`.`t10`.`pk` = `test`.`t1`.`a`) and (`test`.`t12`.`pk` = `test`.`t10`.`a`))
subqueries within outer joins go into ON expr.
explAin extended
select * from t1 left join (t2 A, t2 B) on ( A.A= t1.A And B.A in (select pk from t10));
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
1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer
1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer
2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on(((`test`.`A`.`A` = `test`.`t1`.`A`) And <in_optimizer>(`test`.`B`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`B`.`A`) in t10 on PRIMARY))))) where 1
t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)"
explAin extended
select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10));
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
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer
2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on(((`test`.`t2`.`A` = `test`.`t1`.`A`) And <in_optimizer>(`test`.`t2`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`t2`.`A`) in t10 on PRIMARY))))) where 1
we shouldn't flatten if we're going to get a join of > MAX_TABLES.
explain select * from
t1 s00, t1 s01, t1 s02, t1 s03, t1 s04,t1 s05,t1 s06,t1 s07,t1 s08,t1 s09,
t1 s10, t1 s11, t1 s12, t1 s13, t1 s14,t1 s15,t1 s16,t1 s17,t1 s18,t1 s19,
t1 s20, t1 s21, t1 s22, t1 s23, t1 s24,t1 s25,t1 s26,t1 s27,t1 s28,t1 s29,
t1 s30, t1 s31, t1 s32, t1 s33, t1 s34,t1 s35,t1 s36,t1 s37,t1 s38,t1 s39,
t1 s40, t1 s41, t1 s42, t1 s43, t1 s44,t1 s45,t1 s46,t1 s47,t1 s48,t1 s49
where
s00.a in (
select m00.a from
t1 m00, t1 m01, t1 m02, t1 m03, t1 m04,t1 m05,t1 m06,t1 m07,t1 m08,t1 m09,
t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19
);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer
1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where
2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer
2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
select * from
t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10))
where t1.a < 5;
a b a b
0 0 0 0
1 1 1 1
2 2 2 2
prepare s1 from
' select * from
t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10))
where t1.a < 5';
execute s1;
a b a b
0 0 0 0
1 1 1 1
2 2 2 2
execute s1;
a b a b
0 0 0 0
1 1 1 1
2 2 2 2
insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B;
explain extended select * from t1 where a in (select pk from t10 where pk<3);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index
1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3))
BUG#37120 optimizer_switch allowable values not according to specification
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,table_elimination=on
set optimizer_switch='default,materialization=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on,table_elimination=on
set optimizer_switch='default,semijoin=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off,table_elimination=on
set optimizer_switch='default,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on,table_elimination=on
set optimizer_switch='default,semijoin=off,materialization=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,table_elimination=on
set optimizer_switch='default,materialization=off,semijoin=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,table_elimination=on
set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off,table_elimination=on
set optimizer_switch='default,semijoin=off,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off,table_elimination=on
set optimizer_switch='default,materialization=off,loosescan=off';
select @@optimizer_switch;
@@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on,table_elimination=on
set optimizer_switch=default;
drop table t0, t1, t2;
drop table t10, t11, t12;
Bug#37899: Wrongly checked optimization prerequisite caused failed
assertion.
CREATE TABLE t1 (
`pk` int(11),
`varchar_nokey` varchar(5)
);
INSERT INTO t1 VALUES
(1,'qk'),(2,'j'),(3,'aew');
SELECT *
FROM t1
WHERE varchar_nokey IN (
SELECT
varchar_nokey
FROM
t1
) XOR pk = 30;
pk varchar_nokey
1 qk
2 j
3 aew
drop table t1;
#
# BUG#41842: Semi-join materialization strategy crashes when the upper query has HAVING
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
int_nokey int(11) NOT NULL,
time_key time NOT NULL,
datetime_key datetime NOT NULL,
datetime_nokey datetime NOT NULL,
varchar_key varchar(1) NOT NULL,
varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY time_key (time_key),
KEY datetime_key (datetime_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t1 VALUES
(1,0, '00:16:10','2008-09-03 14:25:40','2008-09-03 14:25:40','h','h'),
(2,7, '00:00:00','2001-01-13 00:00:00','2001-01-13 00:00:00','',''),
(3,0, '00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'),
(4,2, '16:29:24','2000-10-16 01:39:08','2000-10-16 01:39:08','w','w'),
(5,1, '09:23:32','0000-00-00 00:00:00','0000-00-00 00:00:00','p','p'),
(6,3, '00:00:00','2007-12-02 00:00:00','2007-12-02 00:00:00','o','o'),
(7,3, '00:00:00','2008-09-11 00:00:00','2008-09-11 00:00:00','',''),
(8,0, '13:59:04','0000-00-00 00:00:00','0000-00-00 00:00:00','s','s'),
(9,7, '09:01:06','0000-00-00 00:00:00','0000-00-00 00:00:00','d','d'),
(10,5,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','n','n'),
(11,0,'21:06:46','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'),
(12,2,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','',''),
(13,6,'14:45:34','2003-07-28 02:34:08','2003-07-28 02:34:08','w','w'),
(14,1,'15:04:12','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'),
(15,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'),
(16,0,'15:55:23','2004-03-17 00:32:27','2004-03-17 00:32:27','p','p'),
(17,1,'16:30:00','2004-12-27 19:20:00','2004-12-27 19:20:00','d','d'),
(18,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','h','h'),
(19,0,'14:13:26','2008-11-09 05:53:48','2008-11-09 05:53:48','o','o'),
(20,0,'00:00:00','2009-10-11 06:58:04','2009-10-11 06:58:04','k','k');
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
int_nokey int(11) NOT NULL,
time_key time NOT NULL,
datetime_key datetime NOT NULL,
datetime_nokey datetime NOT NULL,
varchar_key varchar(1) NOT NULL,
varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY time_key (time_key),
KEY datetime_key (datetime_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t2 VALUES
(10,0,'19:39:13','0000-00-00 00:00:00','0000-00-00 00:00:00','g','g'),
(11,8,'03:43:53','0000-00-00 00:00:00','0000-00-00 00:00:00','b','b');
SELECT OUTR.datetime_nokey AS X FROM t1 AS OUTR
WHERE
OUTR.varchar_nokey IN (SELECT
INNR . varchar_nokey AS Y
FROM t2 AS INNR
WHERE
INNR . datetime_key >= INNR . time_key OR
INNR . pk = INNR . int_nokey
)
AND OUTR . varchar_nokey <= 'w'
HAVING X > '2012-12-12';
X
drop table t1, t2;
#
# Bug#45191: Incorrectly initialized semi-join led to a wrong result.
#
CREATE TABLE STAFF (EMPNUM CHAR(3) NOT NULL,
EMPNAME CHAR(20), GRADE DECIMAL(4), CITY CHAR(15));
CREATE TABLE PROJ (PNUM CHAR(3) NOT NULL,
PNAME CHAR(20), PTYPE CHAR(6),
BUDGET DECIMAL(9),
CITY CHAR(15));
CREATE TABLE WORKS (EMPNUM CHAR(3) NOT NULL,
PNUM CHAR(3) NOT NULL, HOURS DECIMAL(5));
INSERT INTO STAFF VALUES ('E1','Alice',12,'Deale');
INSERT INTO STAFF VALUES ('E2','Betty',10,'Vienna');
INSERT INTO STAFF VALUES ('E3','Carmen',13,'Vienna');
INSERT INTO STAFF VALUES ('E4','Don',12,'Deale');
INSERT INTO STAFF VALUES ('E5','Ed',13,'Akron');
INSERT INTO PROJ VALUES ('P1','MXSS','Design',10000,'Deale');
INSERT INTO PROJ VALUES ('P2','CALM','Code',30000,'Vienna');
INSERT INTO PROJ VALUES ('P3','SDP','Test',30000,'Tampa');
INSERT INTO PROJ VALUES ('P4','SDP','Design',20000,'Deale');
INSERT INTO PROJ VALUES ('P5','IRM','Test',10000,'Vienna');
INSERT INTO PROJ VALUES ('P6','PAYR','Design',50000,'Deale');
INSERT INTO WORKS VALUES ('E1','P1',40);
INSERT INTO WORKS VALUES ('E1','P2',20);
INSERT INTO WORKS VALUES ('E1','P3',80);
INSERT INTO WORKS VALUES ('E1','P4',20);
INSERT INTO WORKS VALUES ('E1','P5',12);
INSERT INTO WORKS VALUES ('E1','P6',12);
INSERT INTO WORKS VALUES ('E2','P1',40);
INSERT INTO WORKS VALUES ('E2','P2',80);
INSERT INTO WORKS VALUES ('E3','P2',20);
INSERT INTO WORKS VALUES ('E4','P2',20);
INSERT INTO WORKS VALUES ('E4','P4',40);
INSERT INTO WORKS VALUES ('E4','P5',80);
set optimizer_switch='default,materialization=off';
explain SELECT EMPNUM, EMPNAME
FROM STAFF
WHERE EMPNUM IN
(SELECT EMPNUM FROM WORKS
WHERE PNUM IN
(SELECT PNUM FROM PROJ));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY STAFF ALL NULL NULL NULL NULL 5
1 PRIMARY PROJ ALL NULL NULL NULL NULL 6
1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF)
SELECT EMPNUM, EMPNAME
FROM STAFF
WHERE EMPNUM IN
(SELECT EMPNUM FROM WORKS
WHERE PNUM IN
(SELECT PNUM FROM PROJ));
EMPNUM EMPNAME
E1 Alice
E2 Betty
E3 Carmen
E4 Don
set optimizer_switch='default';
drop table STAFF,WORKS,PROJ;
# End of bug#45191
#
# Bug#46550 Azalea returning duplicate results for some IN subqueries
# w/ semijoin=on
#
DROP TABLE IF EXISTS t0, t1, t2;
CREATE TABLE t0 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t0 VALUES
(1,'m','m'),
(40,'h','h'),
(1,'r','r'),
(1,'h','h'),
(9,'x','x'),
(NULL,'q','q'),
(NULL,'k','k'),
(7,'l','l'),
(182,'k','k'),
(202,'a','a'),
(7,'x','x'),
(6,'j','j'),
(119,'z','z'),
(4,'d','d'),
(5,'h','h'),
(1,'u','u'),
(3,'q','q'),
(7,'a','a'),
(3,'e','e'),
(6,'l','l');
CREATE TABLE t1 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t1 VALUES (7,NULL,NULL),(4,'x','x');
CREATE TABLE t2 (
int_key int(11) DEFAULT NULL,
varchar_key varchar(1) DEFAULT NULL,
varchar_nokey varchar(1) DEFAULT NULL,
KEY int_key (int_key),
KEY varchar_key (varchar_key,int_key)
);
INSERT INTO t2 VALUES (123,NULL,NULL);
SELECT int_key
FROM t0
WHERE varchar_nokey IN (
SELECT t1 .varchar_key from t1
);
int_key
9
7
SELECT t0.int_key
FROM t0
WHERE t0.varchar_nokey IN (
SELECT t1_1 .varchar_key
FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key
);
int_key
9
7
SELECT t0.int_key
FROM t0, t2
WHERE t0.varchar_nokey IN (
SELECT t1_1 .varchar_key
FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key
);
int_key
9
7
DROP TABLE t0, t1, t2;
# End of bug#46550
#
# Bug #46744 Crash in optimize_semijoin_nests on empty view
# with limit and procedure.
#
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
DROP PROCEDURE IF EXISTS p1;
CREATE TABLE t1 ( f1 int );
CREATE TABLE t2 ( f1 int );
insert into t2 values (5), (7);
CREATE OR REPLACE VIEW v1 AS SELECT * FROM t1 LIMIT 2;
create procedure p1()
select COUNT(*)
FROM v1 WHERE f1 IN
(SELECT f1 FROM t2 WHERE f1 = ANY (SELECT f1 FROM v1));
SET SESSION optimizer_switch = 'semijoin=on';
CALL p1();
COUNT(*)
0
SET SESSION optimizer_switch = 'semijoin=off';
CALL p1();
COUNT(*)
0
drop table t1, t2;
drop view v1;
drop procedure p1;
set SESSION optimizer_switch='default';
# End of bug#46744
Bug#46797 "Crash in fix_semijoin_strategies_for_picked_join_order
with semijoin=on"
CREATE TABLE t1 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
CREATE TABLE t2 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
);
INSERT INTO t2 VALUES
(NULL),(NULL),(NULL),(NULL),('a'),('a'),('a'),('b'),('b'),('b'),('b'),('c'),
('c'),('c'),('c'),('c'),('c'),('c'),('d'),('d'),('d'),('d'),('d'),('d'),('e'),
('e'),('e'),('e'),('e'),('e'),('f'),('f'),('f'),('g'),('g'),('h'),('h'),('h'),
('h'),('i'),('j'),('j'),('j'),('k'),('k'),('l'),('l'),('m'),('m'),('m'),('m'),
('n'),('n'),('n'),('o'),('o'),('o'),('p'),('p'),('p'),('q'),('q'),('q'),('r'),
('r'),('r'),('r'),('s'),('s'),('s'),('s'),('t'),('t'),('t'),('t'),('u'),('u'),
('u'),('u'),('v'),('v'),('v'),('v'),('w'),('w'),('w'),('w'),('w'),('w'),('x'),
('x'),('x'),('y'),('y'),('y'),('y'),('z'),('z'),('z'),('z');
CREATE TABLE t3 (
varchar_key varchar(1) DEFAULT NULL,
KEY varchar_key (varchar_key)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t3 VALUES
(NULL),('c'),('d'),('e'),('f'),('h'),('j'),('k'),('k'),('m'),('m'),('m'),
('n'),('o'),('r'),('t'),('t'),('u'),('w'),('y');
SELECT varchar_key FROM t3
WHERE (SELECT varchar_key FROM t3
WHERE (varchar_key,varchar_key)
IN (SELECT t1.varchar_key, t2 .varchar_key
FROM t1 RIGHT JOIN t2 ON t1.varchar_key
)
);
varchar_key
DROP TABLE t1, t2, t3;
#
# Bug#46556 Returning incorrect, empty results for some IN subqueries
# w/semijoin=on
#
CREATE TABLE t0 (
pk INTEGER,
vkey VARCHAR(1),
vnokey VARCHAR(1),
PRIMARY KEY (pk),
KEY vkey(vkey)
);
INSERT INTO t0
VALUES (1,'g','g'), (2,'v','v'), (3,'t','t'), (4,'u','u'), (5,'n','n');
EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN
(SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where; Using join buffer
1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 100.00 Using index; FirstMatch(t1)
Warnings:
Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where ((`test`.`t2`.`vkey` = `test`.`t1`.`vnokey`) and (`test`.`t1`.`pk` = `test`.`t0`.`pk`))
SELECT vkey FROM t0 WHERE pk IN
(SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey);
vkey
g
v
t
u
n
DROP TABLE t0;
# End of bug#46556
Bug #48073 Subquery on char columns from view crashes Mysql
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
CREATE TABLE t1 (
city VARCHAR(50) NOT NULL,
country_id SMALLINT UNSIGNED NOT NULL
);
INSERT INTO t1 VALUES
('Batna',2),
('Bchar',2),
('Skikda',2),
('Tafuna',3),
('Algeria',2) ;
CREATE TABLE t2 (
country_id SMALLINT UNSIGNED NOT NULL,
country VARCHAR(50) NOT NULL
);
INSERT INTO t2 VALUES
(2,'Algeria'),
(3,'American Samoa') ;
CREATE VIEW v1 AS
SELECT country_id, country
FROM t2
WHERE LEFT(country,1) = "A"
;
SELECT city, country_id
FROM t1
WHERE city IN (
SELECT country
FROM t2
WHERE LEFT(country, 1) = "A"
);
city country_id
Algeria 2
SELECT city, country_id
FROM t1
WHERE city IN (
SELECT country
FROM v1
);
city country_id
Algeria 2
drop table t1, t2;
drop view v1;
# End of bug#48073
Bug#48834: Procedure with view + subquery + semijoin=on
crashes on second call.
SET SESSION optimizer_switch ='semijoin=on';
CREATE TABLE t1 ( t1field integer, primary key (t1field));
CREATE TABLE t2 ( t2field integer, primary key (t2field));
CREATE VIEW v1 AS
SELECT t1field as v1field
FROM t1 A
WHERE A.t1field IN (SELECT t1field FROM t2 );
CREATE VIEW v2 AS
SELECT t2field as v2field
FROM t2 A
WHERE A.t2field IN (SELECT t2field FROM t2 );
CREATE PROCEDURE p1 ()
BEGIN
SELECT v1field
FROM v1
WHERE v1field IN ( SELECT v2field as vf_inner FROM v2 );
END|
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (2),(3),(4);
CALL p1;
v1field
2
3
CALL p1;
v1field
2
3
DROP TABLE t1,t2;
DROP VIEW v1,v2;
DROP PROCEDURE p1;
set SESSION optimizer_switch='default';
# End of BUG#48834
Bug#49097 subquery with view generates wrong result with
non-prepared statement
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
CREATE TABLE t1 (
city VARCHAR(50) NOT NULL,
country_id SMALLINT UNSIGNED NOT NULL
);
INSERT INTO t1 VALUES
('Batna',2),
('Bchar',2),
('Skikda',2),
('Tafuna',3),
('Algeria',2) ;
CREATE TABLE t2 (
country_id SMALLINT UNSIGNED NOT NULL,
country VARCHAR(50) NOT NULL
);
INSERT INTO t2 VALUES
(2,'Algeria'),
(3,'XAmerican Samoa') ;
CREATE VIEW v1 AS
SELECT country_id, country
FROM t2
WHERE LEFT(country,1) = "A"
;
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id
FROM t2
WHERE LEFT(country,1) = "A"
);
city country_id
Batna 2
Bchar 2
Skikda 2
Algeria 2
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id
FROM v1
);
city country_id
Batna 2
Bchar 2
Skikda 2
Algeria 2
PREPARE stmt FROM
"
SELECT city, country_id
FROM t1
WHERE country_id IN (
SELECT country_id
FROM v1
);
";
execute stmt;
city country_id
Batna 2
Bchar 2
Skikda 2
Algeria 2
deallocate prepare stmt;
drop table t1, t2;
drop view v1;
# End of Bug#49097
#
# BUG#38075: Wrong result: rows matching a subquery with outer join not returned
#
DROP TABLE IF EXISTS ot1, it1, it2;
CREATE TABLE it2 (
int_key int(11) NOT NULL,
datetime_key datetime NOT NULL,
KEY int_key (int_key),
KEY datetime_key (datetime_key)
);
INSERT INTO it2 VALUES
(5,'2002-04-10 14:25:30'), (0,'0000-00-00 00:00:00'),
(0,'2006-09-14 04:01:02'), (4,'0000-00-00 00:00:00'),
(8,'0000-00-00 00:00:00'), (5,'0000-00-00 00:00:00'),
(9,'0000-00-00 00:00:00'), (8,'2007-04-01 11:04:17'),
(1,'0000-00-00 00:00:00'), (7,'2009-01-12 00:00:00'),
(0,'2009-06-05 00:00:00'), (3,'2006-02-14 18:06:35'),
(5,'2006-02-21 07:08:16'), (0,'0000-00-00 00:00:00'),
(7,'0000-00-00 00:00:00'), (0,'0000-00-00 00:00:00'),
(0,'2007-02-13 00:00:00'), (1,'0000-00-00 00:00:00'),
(0,'0000-00-00 00:00:00'), (1,'2003-08-11 00:00:00');
CREATE TABLE ot1 (
int_nokey int(11) NOT NULL,
int_key int(11) NOT NULL,
KEY int_key (int_key)
);
INSERT INTO ot1 VALUES
(5,0), (3,0), (0,2), (3,0), (1,3), (0,0), (1,7), (7,0), (1,7), (0,7),
(0,9), (8,2), (4,4), (9,3), (0,9), (2,5), (0,5), (8,0), (5,8), (1,5);
CREATE TABLE it1 (
int_nokey int(11) NOT NULL,
int_key int(11) NOT NULL,
KEY int_key (int_key)
);
INSERT INTO it1 VALUES
(9,5), (0,4);
SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
int_key
0
8
2
0
7
9
9
5
2
0
0
0
0
3
7
7
5
EXPLAIN
SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY it1 index NULL int_key 4 NULL 2 Using index; Start temporary
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer
1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer
DROP TABLE ot1, it1, it2;
# End of BUG#38075
set join_cache_level=default;
show variables like 'join_cache_level';
Variable_name Value
join_cache_level 1