| Current Path : /home/usr.opt/mysql57/mysql-test/r/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //home/usr.opt/mysql57/mysql-test/r/derived.result |
drop table if exists t1,t2,t3;
select * from (select 2 from DUAL) b;
2
2
SELECT 1 as a FROM (SELECT 1 UNION SELECT a) b;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT a UNION SELECT 1) b;
ERROR 42S22: Unknown column 'a' in 'field list'
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
select t1.a,t3.y from t1,(select a as y from t2 where b='c') as t3 where t1.a = t3.y;
a y
3 3
3 3
select t1.a,t3.a from t1,(select * from t2 where b='c') as t3 where t1.a = t3.a;
a a
3 3
3 3
CREATE TABLE t3 (a int not null, b char (10) not null);
insert into t3 values (3,'f'),(4,'y'),(5,'z'),(6,'c');
select t1.a,t4.y from t1,(select t2.a as y from t2,(select t3.b from t3 where t3.a>3) as t5 where t2.b=t5.b) as t4 where t1.a = t4.y;
a y
3 3
3 3
SELECT a FROM (SELECT 1 FROM (SELECT 1) a HAVING a=1) b;
ERROR 42S22: Unknown column 'a' in 'having clause'
SELECT a,b as a FROM (SELECT '1' as a,'2' as b) b HAVING a=1;
ERROR 23000: Column 'a' in having clause is ambiguous
SELECT a,2 as a FROM (SELECT '1' as a) b HAVING a=2;
a a
1 2
SELECT a,2 as a FROM (SELECT '1' as a) b HAVING a=1;
a a
SELECT 1 FROM (SELECT 1) a WHERE a=2;
ERROR 42S22: Unknown column 'a' in 'where clause'
SELECT (SELECT 1) as a FROM (SELECT 1 FROM t1 HAVING a=1) as a;
ERROR 42S22: Unknown column 'a' in 'having clause'
select * from t1 as x1, (select * from t1) as x2;
a b a b
1 a 1 a
2 b 1 a
3 c 1 a
3 c 1 a
1 a 2 b
2 b 2 b
3 c 2 b
3 c 2 b
1 a 3 c
2 b 3 c
3 c 3 c
3 c 3 c
1 a 3 c
2 b 3 c
3 c 3 c
3 c 3 c
explain select * from t1 as x1, (select * from t1) as x2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE x1 NULL ALL NULL NULL NULL NULL 4 100.00 NULL
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 4 100.00 Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`x1`.`a` AS `a`,`test`.`x1`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` `x1` join `test`.`t1`
drop table if exists t2,t3;
select * from (select 1) as a;
1
1
select a from (select 1 as a) as b;
a
1
select 1 from (select 1) as a;
1
1
select * from (select * from t1 union select * from t1) a;
a b
1 a
2 b
3 c
select * from (select * from t1 union all select * from t1) a;
a b
1 a
2 b
3 c
3 c
1 a
2 b
3 c
3 c
select * from (select * from t1 union all select * from t1 limit 2) a;
a b
1 a
2 b
explain select * from (select * from t1 union select * from t1) a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 8 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 4 100.00 NULL
3 UNION t1 NULL ALL NULL NULL NULL NULL 4 100.00 NULL
NULL UNION RESULT <union2,3> NULL ALL NULL NULL NULL NULL NULL NULL Using temporary
Warnings:
Note 1003 /* select#1 */ select `a`.`a` AS `a`,`a`.`b` AS `b` from (/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union /* select#3 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) `a`
explain select * from (select * from t1 union all select * from t1) a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 8 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 4 100.00 NULL
3 UNION t1 NULL ALL NULL NULL NULL NULL 4 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `a`.`a` AS `a`,`a`.`b` AS `b` from (/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` union all /* select#3 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) `a`
CREATE TABLE t2 (a int not null);
insert into t2 values(1);
select * from (select * from t1 where t1.a=(select a from t2 where t2.a=t1.a)) a;
a b
1 a
select * from (select * from t1 where t1.a=(select t2.a from t2 where t2.a=t1.a) union select t1.a, t1.b from t1) a;
a b
1 a
2 b
3 c
explain select * from (select t1.*, t2.a as t2a from t1,t2 where t1.a=t2.a) t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL system NULL NULL NULL NULL 1 100.00 NULL
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 4 25.00 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'1' AS `t2a` from `test`.`t1` where (`test`.`t1`.`a` = '1')
drop table t1, t2;
create table t1(a int not null, t char(8), index(a));
SELECT * FROM (SELECT * FROM t1) as b ORDER BY a ASC LIMIT 0,20;
a t
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
12 12
13 13
14 14
15 15
16 16
17 17
18 18
19 19
20 20
explain select count(*) from t1 as tt1, (select * from t1) as tt2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
Warnings:
Note 1003 /* select#1 */ select count(0) AS `count(*)` from `test`.`t1` `tt1` join `test`.`t1`
drop table t1;
SELECT * FROM (SELECT (SELECT * FROM (SELECT 1 as a) as a )) as b;
(SELECT * FROM (SELECT 1 as a) as a )
1
select * from (select 1 as a) b left join (select 2 as a) c using(a);
a
1
SELECT * FROM (SELECT 1 UNION SELECT a) b;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT a UNION SELECT 1) b;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT 1 UNION SELECT a) b;
ERROR 42S22: Unknown column 'a' in 'field list'
select 1 from (select 2) a order by 0;
ERROR 42S22: Unknown column '0' in 'order clause'
create table t1 (id int);
insert into t1 values (1),(2),(3);
describe select * from (select * from t1 group by id) bar;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 3 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 3 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `bar`.`id` AS `id` from (/* select#2 */ select `test`.`t1`.`id` AS `id` from `test`.`t1` group by `test`.`t1`.`id`) `bar`
drop table t1;
create table t1 (mat_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, matintnum CHAR(6) NOT NULL, test MEDIUMINT UNSIGNED NULL);
create table t2 (mat_id MEDIUMINT UNSIGNED NOT NULL, pla_id MEDIUMINT UNSIGNED NOT NULL);
insert into t1 values (NULL, 'a', 1), (NULL, 'b', 2), (NULL, 'c', 3), (NULL, 'd', 4), (NULL, 'e', 5), (NULL, 'f', 6), (NULL, 'g', 7), (NULL, 'h', 8), (NULL, 'i', 9);
insert into t2 values (1, 100), (1, 101), (1, 102), (2, 100), (2, 103), (2, 104), (3, 101), (3, 102), (3, 105);
analyze table t1, t2;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t2 analyze status OK
SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
pla_id mat_id
100 1
101 1
102 1
103 2
104 2
105 3
SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
pla_id test
100 1
101 1
102 1
103 2
104 2
105 3
explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY m2 NULL ALL NULL NULL NULL NULL 9 100.00 NULL
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 7 test.m2.matintnum 2 100.00 NULL
2 DERIVED mp NULL ALL NULL NULL NULL NULL 9 100.00 Using temporary; Using filesort
2 DERIVED m1 NULL eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select straight_join `d`.`pla_id` AS `pla_id`,`test`.`m2`.`mat_id` AS `mat_id` from `test`.`t1` `m2` join (/* select#2 */ select `test`.`mp`.`pla_id` AS `pla_id`,min(`test`.`m1`.`matintnum`) AS `matintnum` from `test`.`t2` `mp` join `test`.`t1` `m1` where (`test`.`m1`.`mat_id` = `test`.`mp`.`mat_id`) group by `test`.`mp`.`pla_id`) `d` where (`d`.`matintnum` = `test`.`m2`.`matintnum`)
explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY m2 NULL ALL NULL NULL NULL NULL 9 100.00 NULL
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 7 test.m2.matintnum 2 100.00 NULL
2 DERIVED mp NULL ALL NULL NULL NULL NULL 9 100.00 Using temporary; Using filesort
2 DERIVED m1 NULL eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select straight_join `d`.`pla_id` AS `pla_id`,`test`.`m2`.`test` AS `test` from `test`.`t1` `m2` join (/* select#2 */ select `test`.`mp`.`pla_id` AS `pla_id`,min(`test`.`m1`.`matintnum`) AS `matintnum` from `test`.`t2` `mp` join `test`.`t1` `m1` where (`test`.`m1`.`mat_id` = `test`.`mp`.`mat_id`) group by `test`.`mp`.`pla_id`) `d` where (`d`.`matintnum` = `test`.`m2`.`matintnum`)
drop table t1,t2;
SELECT a.x FROM (SELECT 1 AS x) AS a HAVING a.x = 1;
x
1
create user mysqltest_1;
create table t1 select 1 as a;
select 2 as a from (select * from t1) b;
ERROR 3D000: No database selected
use test;
select 2 as a from (select * from t1) b;
a
2
drop table t1;
select mail_id, if(folder.f_description!='', folder.f_description, folder.f_name) as folder_name, date, address_id, phrase, address, subject from folder, (select mail.mail_id as mail_id, date_format(mail.h_date, '%b %e, %Y %h:%i') as date, mail.folder_id, sender.address_id as address_id, sender.phrase as phrase, sender.address as address, mail.h_subject as subject from mail left join mxa as mxa_sender on mail.mail_id=mxa_sender.mail_id and mxa_sender.type='from' left join address as sender on mxa_sender.address_id=sender.address_id mxa as mxa_recipient, address as recipient, where 1 and mail.mail_id=mxa_recipient.mail_id and mxa_recipient.address_id=recipient.address_id and mxa_recipient.type='to' and match(sender.phrase, sender.address, sender.comment) against ('jeremy' in boolean mode) and match(recipient.phrase, recipient.address, recipient.comment) against ('monty' in boolean mode) order by mail.h_date desc limit 0, 25 ) as query where query.folder_id=folder.folder_id;
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 'mxa as mxa_recipient, address as recipient, where 1 and mail.mail_id=mxa_r' at line 1
create table t1 (a int);
insert into t1 values (1),(2),(3);
update (select * from t1) as t1 set a = 5;
ERROR HY000: The target table t1 of the UPDATE is not updatable
delete from (select * 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 '(select * from t1)' at line 1
insert into (select * from t1) values (5);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(select * from t1) values (5)' at line 1
drop table t1;
create table t1 (E1 INTEGER UNSIGNED NOT NULL, E2 INTEGER UNSIGNED NOT NULL, E3 INTEGER UNSIGNED NOT NULL, PRIMARY KEY(E1)
);
insert into t1 VALUES(1,1,1), (2,2,1);
select count(*) from t1 INNER JOIN (SELECT A.E1, A.E2, A.E3 FROM t1 AS A WHERE A.E3 = (SELECT MAX(B.E3) FROM t1 AS B WHERE A.E2 = B.E2)) AS themax ON t1.E1 = themax.E2 AND t1.E1 = t1.E2;
count(*)
2
explain select count(*) from t1 INNER JOIN (SELECT a.E1, a.E2, a.E3 FROM t1 AS a WHERE a.E3 = (SELECT max(b.E3) FROM t1 AS b WHERE a.E2 = b.E2)) AS themax ON t1.E1 = themax.E2 AND t1.E1 = t1.E2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY a NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY t1 NULL eq_ref PRIMARY PRIMARY 4 test.a.E2 1 50.00 Using where
3 DEPENDENT SUBQUERY b NULL ALL NULL NULL NULL NULL 2 50.00 Using where
Warnings:
Note 1276 Field or reference 'test.a.E2' of SELECT #3 was resolved in SELECT #2
Note 1003 /* select#1 */ select count(0) AS `count(*)` from `test`.`t1` join `test`.`t1` `a` where ((`test`.`t1`.`E1` = `test`.`a`.`E2`) and (`test`.`t1`.`E2` = `test`.`a`.`E2`) and (`test`.`a`.`E3` = (/* select#3 */ select max(`test`.`b`.`E3`) from `test`.`t1` `b` where (`test`.`a`.`E2` = `test`.`b`.`E2`))))
drop table t1;
create table t1 (a int);
insert into t1 values (1),(2);
select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b;
a a
1 1
2 1
1 2
2 2
explain select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 4 100.00 NULL
1 PRIMARY <derived4> NULL ALL NULL NULL NULL NULL 4 100.00 Using join buffer (Block Nested Loop)
4 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
5 UNION t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
NULL UNION RESULT <union4,5> NULL ALL NULL NULL NULL NULL NULL NULL Using temporary
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
3 UNION t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
NULL UNION RESULT <union2,3> NULL ALL NULL NULL NULL NULL NULL NULL Using temporary
Warnings:
Note 1003 /* select#1 */ select `a`.`a` AS `a`,`b`.`a` AS `a` from (/* select#2 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` union /* select#3 */ select `test`.`t1`.`a` AS `a` from `test`.`t1`) `a` join (/* select#4 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` union /* select#5 */ select `test`.`t1`.`a` AS `a` from `test`.`t1`) `b`
drop table t1;
CREATE TABLE `t1` (
`N` int(11) unsigned NOT NULL default '0',
`M` tinyint(1) default '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO `t1` (N, M) VALUES (1, 0),(1, 0),(1, 0),(2, 0),(2, 0),(3, 0);
UPDATE `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N SET P1.M = 2;
select * from t1;
N M
1 2
1 2
1 2
2 2
2 2
3 0
UPDATE `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N SET P1.M = 2, P2.N = 2;
ERROR HY000: The target table P2 of the UPDATE is not updatable
UPDATE `t1` AS P1 INNER JOIN (SELECT aaaa FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N SET P1.M = 2;
ERROR 42S22: Unknown column 'aaaa' in 'field list'
delete P1.* from `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N;
select * from t1;
N M
3 0
delete P1.*,p2.* from `t1` AS P1 INNER JOIN (SELECT N FROM `t1` GROUP BY N HAVING Count(M) > 1) AS p2 ON P1.N = p2.N;
ERROR HY000: The target table p2 of the DELETE is not updatable
delete P1.* from `t1` AS P1 INNER JOIN (SELECT aaa FROM `t1` GROUP BY N HAVING Count(M) > 1) AS P2 ON P1.N = P2.N;
ERROR 42S22: Unknown column 'aaa' in 'field list'
drop table t1;
CREATE TABLE t1 (
OBJECTID int(11) NOT NULL default '0',
SORTORDER int(11) NOT NULL auto_increment,
KEY t1_SortIndex (SORTORDER),
KEY t1_IdIndex (OBJECTID)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
CREATE TABLE t2 (
ID int(11) default NULL,
PARID int(11) default NULL,
UNIQUE KEY t2_ID_IDX (ID),
KEY t2_PARID_IDX (PARID)
) engine=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t2 VALUES (1000,0),(1001,0),(1002,0),(1003,0),(1008,1),(1009,1),(1010,1),(1011,1),(1016,2);
CREATE TABLE t3 (
ID int(11) default NULL,
DATA decimal(10,2) default NULL,
UNIQUE KEY t3_ID_IDX (ID)
) engine=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t3 VALUES (1000,0.00),(1001,0.25),(1002,0.50),(1003,0.75),(1008,1.00),(1009,1.25),(1010,1.50),(1011,1.75);
select 497, TMP.ID, NULL from (select 497 as ID, MAX(t3.DATA) as DATA from t1 join t2 on (t1.ObjectID = t2.ID) join t3 on (t1.ObjectID = t3.ID) group by t2.ParID order by DATA DESC) as TMP;
497 ID NULL
drop table t1, t2, t3;
CREATE TABLE t1 (name char(1) default NULL, val int(5) default NULL);
INSERT INTO t1 VALUES ('a',1), ('a',2), ('a',2), ('a',2), ('a',3), ('a',6), ('a',7), ('a',11), ('a',11), ('a',12), ('a',13), ('a',13), ('a',20), ('b',2), ('b',3), ('b',4), ('b',5);
SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x, t1 y WHERE x.name=y.name GROUP BY x.name, x.val HAVING SUM(y.val <= x.val) >= COUNT(*)/2 AND SUM(y.val >= x.val) >= COUNT(*)/2) AS s GROUP BY s.name;
name median
a 7.0000
b 3.5000
explain SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x, t1 y WHERE x.name=y.name GROUP BY x.name, x.val HAVING SUM(y.val <= x.val) >= COUNT(*)/2 AND SUM(y.val >= x.val) >= COUNT(*)/2) AS s GROUP BY s.name;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 28 100.00 Using temporary; Using filesort
2 DERIVED x NULL ALL NULL NULL NULL NULL 17 100.00 Using temporary; Using filesort
2 DERIVED y NULL ALL NULL NULL NULL NULL 17 10.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `s`.`name` AS `name`,avg(`s`.`val`) AS `median` from (/* select#2 */ select `test`.`x`.`name` AS `name`,`test`.`x`.`val` AS `val` from `test`.`t1` `x` join `test`.`t1` `y` where (`test`.`y`.`name` = `test`.`x`.`name`) group by `test`.`x`.`name`,`test`.`x`.`val` having ((sum((`test`.`y`.`val` <= `test`.`x`.`val`)) >= (count(0) / 2)) and (sum((`test`.`y`.`val` >= `test`.`x`.`val`)) >= (count(0) / 2)))) `s` group by `s`.`name`
drop table t1;
create table t2 (a int, b int, primary key (a));
insert into t2 values (1,7),(2,7);
explain select a from t2 where a>1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where (`test`.`t2`.`a` > 1)
explain select a from (select a from t2 where a>1) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where (`test`.`t2`.`a` > 1)
drop table t2;
SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
Warnings:
Warning 3090 Changing sql mode 'NO_AUTO_CREATE_USER' is deprecated. It will be removed in a future release.
CREATE TABLE `t1` ( `itemid` int(11) NOT NULL default '0', `grpid` varchar(15) NOT NULL default '', `vendor` int(11) NOT NULL default '0', `date_` date NOT NULL default '0000-00-00', `price` decimal(12,2) NOT NULL default '0.00', PRIMARY KEY (`itemid`,`grpid`,`vendor`,`date_`), KEY `itemid` (`itemid`,`vendor`), KEY `itemid_2` (`itemid`,`date_`));
insert into t1 values (128, 'rozn', 2, curdate(), 10),
(128, 'rozn', 1, curdate(), 10);
SELECT MIN(price) min, MAX(price) max, AVG(price) avg FROM (SELECT SUBSTRING( MAX(concat(date_,";",price)), 12) price FROM t1 WHERE itemid=128 AND grpid='rozn' GROUP BY itemid, grpid, vendor) lastprices;
min max avg
10.00 10.00 10
DROP TABLE t1;
SET sql_mode = default;
create table t1 (a integer, b integer);
insert into t1 values (1,4), (2,2),(2,2), (4,1),(4,1),(4,1),(4,1);
select distinct sum(b) from t1 group by a;
sum(b)
4
select distinct sum(b) from (select a,b from t1) y group by a;
sum(b)
4
drop table t1;
CREATE TABLE t1 (a char(10), b char(10));
INSERT INTO t1 VALUES ('root','localhost'), ('root','%');
SELECT * FROM (SELECT (SELECT a.a FROM t1 AS a WHERE a.a = b.a) FROM t1 AS b) AS c;
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1;
create table t1(a int);
create table t2(a int);
create table t3(a int);
insert into t1 values(1),(1);
insert into t2 values(2),(2);
insert into t3 values(3),(3);
select * from t1 union distinct select * from t2 union all select * from t3;
a
1
2
3
3
select * from (select * from t1 union distinct select * from t2 union all select * from t3) X;
a
1
2
3
3
drop table t1, t2, t3;
create table t1 (a int);
create table t2 (a int);
select * from (select * from t1,t2) foo;
ERROR 42S21: Duplicate column name 'a'
drop table t1,t2;
create table t1 (ID int unsigned not null auto_increment,
DATA varchar(5) not null, primary key (ID));
create table t2 (ID int unsigned not null auto_increment,
DATA varchar(5) not null, FID int unsigned not null,
primary key (ID));
select A.* from (t1 inner join (select * from t2) as A on t1.ID = A.FID);
ID DATA FID
select t2.* from ((select * from t1) as A inner join t2 on A.ID = t2.FID);
ID DATA FID
select t2.* from (select * from t1) as A inner join t2 on A.ID = t2.FID;
ID DATA FID
drop table t1, t2;
drop user mysqltest_1;
# End of 4.1 tests
SELECT 0 FROM
(SELECT 0) t01, (SELECT 0) t02, (SELECT 0) t03, (SELECT 0) t04, (SELECT 0) t05,
(SELECT 0) t06, (SELECT 0) t07, (SELECT 0) t08, (SELECT 0) t09, (SELECT 0) t10,
(SELECT 0) t11, (SELECT 0) t12, (SELECT 0) t13, (SELECT 0) t14, (SELECT 0) t15,
(SELECT 0) t16, (SELECT 0) t17, (SELECT 0) t18, (SELECT 0) t19, (SELECT 0) t20,
(SELECT 0) t21, (SELECT 0) t22, (SELECT 0) t23, (SELECT 0) t24, (SELECT 0) t25,
(SELECT 0) t26, (SELECT 0) t27, (SELECT 0) t28, (SELECT 0) t29, (SELECT 0) t30,
(SELECT 0) t31, (SELECT 0) t32, (SELECT 0) t33, (SELECT 0) t34, (SELECT 0) t35,
(SELECT 0) t36, (SELECT 0) t37, (SELECT 0) t38, (SELECT 0) t39, (SELECT 0) t40,
(SELECT 0) t41, (SELECT 0) t42, (SELECT 0) t43, (SELECT 0) t44, (SELECT 0) t45,
(SELECT 0) t46, (SELECT 0) t47, (SELECT 0) t48, (SELECT 0) t49, (SELECT 0) t50,
(SELECT 0) t51, (SELECT 0) t52, (SELECT 0) t53, (SELECT 0) t54, (SELECT 0) t55,
(SELECT 0) t56, (SELECT 0) t57, (SELECT 0) t58, (SELECT 0) t59, (SELECT 0) t60,
(SELECT 0) t61;
0
0
#
# A nested materialized derived table is used before being populated.
# (addon for bug#19077)
#
CREATE TABLE t1 (i INT, j BIGINT);
INSERT INTO t1 VALUES (1, 2), (2, 2), (3, 2);
SELECT * FROM (SELECT MIN(i) FROM t1
WHERE j = SUBSTRING('12', (SELECT * FROM (SELECT MIN(j) FROM t1) t2))) t3;
MIN(i)
1
DROP TABLE t1;
# End of 5.0 tests
#
# Bug#55586: Crash JOIN of two subqueries in FROM + ORDER BY and GROUP BY
#
CREATE TABLE C (
`col_int_key` int(11) DEFAULT NULL,
`col_varchar_key` varchar(1) DEFAULT NULL,
`col_varchar_nokey` varchar(1) DEFAULT NULL,
KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`)
);
INSERT INTO C VALUES (2,'w','w');
INSERT INTO C VALUES (2,'d','d');
SELECT SUM(DISTINCT table2.col_int_key) field1,
table1.col_varchar_key field2
FROM
(SELECT * FROM C ) table1
JOIN (SELECT * FROM C ) table2
ON table2 .`col_varchar_key` = table1 .`col_varchar_nokey`
GROUP BY field2
ORDER BY field1;
field1 field2
2 d
2 w
DROP TABLE C;
# End of test for bug#55586
#
# Bug#55561: Crash on JOIN with 2 FROM subqueries
#
CREATE TABLE C (
col_int int DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL
);
INSERT INTO `C` VALUES (0,NULL);
INSERT INTO `C` VALUES (5,'y');
SELECT table1.col_varchar
FROM
( SELECT * FROM C ) table1
JOIN ( SELECT * FROM C ) table2 ON table2.col_varchar = table1.col_varchar
WHERE
table2.col_varchar < table2.col_varchar
AND table1.col_varchar != 'k'
LIMIT 1;
col_varchar
DROP TABLE C;
# End on bug#55561
#
# Bug#56233: Hang during key generation for derived tables
#
CREATE TABLE C (
col_varchar_10_key varchar(10) DEFAULT NULL,
col_int_key int DEFAULT NULL,
pk int NOT NULL AUTO_INCREMENT,
col_date_key date DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `col_varchar_10_key` (`col_varchar_10_key`),
KEY `col_int_key` (`col_int_key`),
KEY `col_date_key` (`col_date_key`)
);
INSERT INTO C VALUES ('ok',3,1,'2003-04-02');
CREATE ALGORITHM=TEMPTABLE VIEW viewC AS SELECT * FROM C;
SELECT table1.col_date_key AS field1
FROM
C AS table1
WHERE
(table1.col_int_key <=ANY
( SELECT SUBQUERY1_t1.col_int_key
FROM viewC AS SUBQUERY1_t1
WHERE SUBQUERY1_t1.col_varchar_10_key <= table1.col_varchar_10_key
)
)
;
field1
2003-04-02
DROP TABLE C;
DROP VIEW viewC;
#
#
# Bug#55950: FROM Subquery joined by 2 varchar fields returns empty
# set
#
CREATE TABLE `cc` (
`i1` varchar(1) DEFAULT NULL,
`i2` varchar(1) DEFAULT NULL
);
INSERT INTO `cc` VALUES ('m','m');
INSERT INTO `cc` VALUES ('c','c');
CREATE TABLE `C` (
`o1` varchar(1) DEFAULT NULL
);
INSERT INTO `C` VALUES ('m');
SELECT table1 . o1
FROM C table1
JOIN ( C table2
JOIN ( SELECT * FROM cc ) table3
ON table3 .`i1` = table2 .o1
) ON table3 .`i2` = table2 .o1
;
o1
m
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
# Ref access to the derived table should be used.
EXPLAIN SELECT table1 . o1
FROM C table1
JOIN ( C table2
JOIN ( SELECT * FROM cc ) table3
ON table3 .`i1` = table2 .o1
) ON table3 .`i2` = table2 .o1
;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY table1 NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY table2 NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 8 const,const 1 100.00 Using index
2 DERIVED cc NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select 'm' AS `o1` from (/* select#2 */ select `test`.`cc`.`i1` AS `i1`,`test`.`cc`.`i2` AS `i2` from `test`.`cc`) `table3` where ((`table3`.`i2` = 'm') and (`table3`.`i1` = 'm'))
SET @@optimizer_switch=@optimizer_switch_saved;
DROP TABLE cc;
DROP TABLE C;
# End of test for bug#55950
#
# Bug#56592: Subquery with DISTINCT in FROM clause returns only partial
# result
#
CREATE TABLE `t1` (
`pk` int(11) NOT NULL,
`col_int_key` int(11) DEFAULT NULL,
`col_datetime_key` datetime DEFAULT NULL
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (2, 9, NULL), (3, 3, '1900-01-01 00:00:00'),
(8, 8, '1900-01-01 00:00:00'), (15, 0, '2007-12-15 12:39:34');
SELECT * FROM (
SELECT DISTINCT tableb.col_datetime_key
FROM t1 tablea LEFT JOIN t1 tableb ON tablea.pk < tableb.col_int_key
) AS from_subquery;
col_datetime_key
NULL
1900-01-01 00:00:00
EXPLAIN SELECT * FROM (
SELECT DISTINCT tableb.col_datetime_key
FROM t1 tablea LEFT JOIN t1 tableb ON tablea.pk < tableb.col_int_key
) AS from_subquery;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 16 100.00 NULL
2 DERIVED tablea NULL ALL NULL NULL NULL NULL 4 100.00 Using temporary
2 DERIVED tableb NULL ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `from_subquery`.`col_datetime_key` AS `col_datetime_key` from (/* select#2 */ select distinct `test`.`tableb`.`col_datetime_key` AS `col_datetime_key` from `test`.`t1` `tablea` left join `test`.`t1` `tableb` on((`test`.`tablea`.`pk` < `test`.`tableb`.`col_int_key`)) where 1) `from_subquery`
EXPLAIN SELECT * FROM (
SELECT DISTINCT tablea.col_datetime_key
FROM t1 tablea LEFT JOIN t1 tableb ON tablea.pk < tableb.col_int_key
) AS from_subquery;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 16 100.00 NULL
2 DERIVED tablea NULL ALL NULL NULL NULL NULL 4 100.00 Using temporary
2 DERIVED tableb NULL ALL NULL NULL NULL NULL 4 100.00 Using where; Distinct; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `from_subquery`.`col_datetime_key` AS `col_datetime_key` from (/* select#2 */ select distinct `test`.`tablea`.`col_datetime_key` AS `col_datetime_key` from `test`.`t1` `tablea` left join `test`.`t1` `tableb` on((`test`.`tablea`.`pk` < `test`.`tableb`.`col_int_key`)) where 1) `from_subquery`
DROP TABLE t1;
#
# Bug#58730 Assertion failed: table->key_read == 0 in close_thread_table,
# temptable views
#
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (b INT, KEY (b));
INSERT INTO t1 VALUES (1),(1);
INSERT INTO t2 VALUES (1),(1);
CREATE algorithm=temptable VIEW v1 AS
SELECT 1 FROM t1 LEFT JOIN t1 t3 ON 1 > (SELECT 1 FROM t1);
CREATE algorithm=temptable VIEW v2 AS SELECT 1 FROM t2;
EXPLAIN SELECT 1 FROM t1 JOIN v1 ON 1 > (SELECT 1 FROM v2);
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1, t2;
DROP VIEW v1, v2;
#
# WL#5274: Postpone materialization of views/subqueries in FROM clause.
# Additional tests.
#
CREATE TABLE t1(f1 int, f11 int);
CREATE TABLE t2(f2 int, f22 int);
INSERT INTO t1 VALUES(1,1),(2,2),(3,3),(5,5),(9,9),(7,7);
INSERT INTO t2 VALUES(1,1),(3,3),(2,2),(4,4),(8,8),(6,6);
for merged derived tables
explain for simple derived
EXPLAIN SELECT * FROM (SELECT * FROM t1) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1`
SELECT * FROM (SELECT * FROM t1) tt;
f1 f11
1 1
2 2
3 3
5 5
9 9
7 7
explain for multitable derived
EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM t1 JOIN t2 ON f1=f2) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 6 16.67 Using where; Using join buffer (Block Nested Loop)
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`f2` = `test`.`t1`.`f1`)
SELECT * FROM (SELECT * FROM t1 JOIN t2 ON f1=f2) tt;
f1 f11 f2 f22
1 1 1 1
3 3 3 3
2 2 2 2
explain for derived with where
FLUSH STATUS;
EXPLAIN EXTENDED
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt WHERE f11=2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f11` = 2) and (`test`.`t1`.`f1` in (2,3)))
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
FLUSH STATUS;
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt WHERE f11=2;
f1 f11
2 2
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 7
join of derived
EXPLAIN EXTENDED
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt JOIN
(SELECT * FROM t1 WHERE f1 IN (1,2)) aa ON tt.f1=aa.f1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where; Using join buffer (Block Nested Loop)
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` join `test`.`t1` where ((`test`.`t1`.`f1` = `test`.`t1`.`f1`) and (`test`.`t1`.`f1` in (1,2)) and (`test`.`t1`.`f1` in (2,3)))
SELECT * FROM (SELECT * FROM t1 WHERE f1 IN (2,3)) tt JOIN
(SELECT * FROM t1 WHERE f1 IN (1,2)) aa ON tt.f1=aa.f1;
f1 f11 f1 f11
2 2 2 2
for merged views
CREATE VIEW v1 AS SELECT * FROM t1;
CREATE VIEW v2 AS SELECT * FROM t1 JOIN t2 ON f1=f2;
CREATE VIEW v3 AS SELECT * FROM t1 WHERE f1 IN (2,3);
CREATE VIEW v4 AS SELECT * FROM t2 WHERE f2 IN (2,3);
explain for simple views
EXPLAIN EXTENDED SELECT * FROM v1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 100.00 NULL
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1`
SELECT * FROM v1;
f1 f11
1 1
2 2
3 3
5 5
9 9
7 7
explain for multitable views
EXPLAIN EXTENDED SELECT * FROM v2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 6 16.67 Using where; Using join buffer (Block Nested Loop)
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`f2` = `test`.`t1`.`f1`)
SELECT * FROM v2;
f1 f11 f2 f22
1 1 1 1
3 3 3 3
2 2 2 2
explain for views with where
EXPLAIN EXTENDED SELECT * FROM v3 WHERE f11 IN (1,3);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f11` in (1,3)) and (`test`.`t1`.`f1` in (2,3)))
SELECT * FROM v3 WHERE f11 IN (1,3);
f1 f11
3 3
explain for joined views
EXPLAIN EXTENDED
SELECT * FROM v3 JOIN v4 ON f1=f2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 6 16.67 Using where; Using join buffer (Block Nested Loop)
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`f2` = `test`.`t1`.`f1`) and (`test`.`t1`.`f1` in (2,3)) and (`test`.`t1`.`f1` in (2,3)))
SELECT * FROM v3 JOIN v4 ON f1=f2;
f1 f11 f2 f22
3 3 3 3
2 2 2 2
FLUSH STATUS;
EXPLAIN EXTENDED SELECT * FROM v4 WHERE f2 IN (1,3);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where ((`test`.`t2`.`f2` in (1,3)) and (`test`.`t2`.`f2` in (2,3)))
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
FLUSH STATUS;
SELECT * FROM v4 WHERE f2 IN (1,3);
f2 f22
3 3
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 7
for materialized derived tables
explain for simple derived
EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM t1 GROUP BY f1) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 6 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` group by `test`.`t1`.`f1`) `tt`
SELECT * FROM (SELECT * FROM t1 HAVING f1=f1) tt;
f1 f11
1 1
2 2
3 3
5 5
9 9
7 7
explain showing created indexes and late materialization
FLUSH STATUS;
EXPLAIN EXTENDED
SELECT * FROM t1 JOIN (SELECT * FROM t2 GROUP BY f2) tt ON f1=f2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.f1 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`tt`.`f2` AS `f2`,`tt`.`f22` AS `f22` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` group by `test`.`t2`.`f2`) `tt` where (`tt`.`f2` = `test`.`t1`.`f1`)
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
FLUSH STATUS;
SELECT * FROM t1 JOIN (SELECT * FROM t2 GROUP BY f2) tt ON f1=f2;
f1 f11 f2 f22
1 1 1 1
2 2 2 2
3 3 3 3
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 6
Handler_read_last 0
Handler_read_next 3
Handler_read_prev 0
Handler_read_rnd 6
Handler_read_rnd_next 21
for materialized views
DROP VIEW v1,v2,v3;
CREATE VIEW v1 AS SELECT * FROM t1 GROUP BY f1;
CREATE VIEW v2 AS SELECT * FROM t2 GROUP BY f2;
CREATE VIEW v3 AS SELECT t1.f1,t1.f11 FROM t1 JOIN t1 AS t11 HAVING t1.f1<100;
explain for simple derived
EXPLAIN EXTENDED SELECT * FROM v1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 6 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1`
SELECT * FROM v1;
f1 f11
1 1
2 2
3 3
5 5
7 7
9 9
explain showing created indexes and late materialization for views
FLUSH STATUS;
EXPLAIN EXTENDED SELECT * FROM t1 JOIN v2 ON f1=f2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.f1 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`v2`.`f2` AS `f2`,`v2`.`f22` AS `f22` from `test`.`t1` join `test`.`v2` where (`v2`.`f2` = `test`.`t1`.`f1`)
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
FLUSH STATUS;
SELECT * FROM t1 JOIN v2 ON f1=f2;
f1 f11 f2 f22
1 1 1 1
2 2 2 2
3 3 3 3
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 6
Handler_read_last 0
Handler_read_next 3
Handler_read_prev 0
Handler_read_rnd 6
Handler_read_rnd_next 21
EXPLAIN EXTENDED
SELECT * FROM t1,v3 AS v31,v3 WHERE t1.f1=v31.f1 and t1.f1=v3.f1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.f1 3 100.00 NULL
1 PRIMARY <derived3> NULL ref <auto_key0> <auto_key0> 5 test.t1.f1 3 100.00 NULL
3 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 NULL
3 DERIVED t11 NULL ALL NULL NULL NULL NULL 6 100.00 Using join buffer (Block Nested Loop)
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 NULL
2 DERIVED t11 NULL ALL NULL NULL NULL NULL 6 100.00 Using join buffer (Block Nested Loop)
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`v31`.`f1` AS `f1`,`v31`.`f11` AS `f11`,`v3`.`f1` AS `f1`,`v3`.`f11` AS `f11` from `test`.`t1` join `test`.`v3` `v31` join `test`.`v3` where ((`v31`.`f1` = `test`.`t1`.`f1`) and (`v3`.`f1` = `test`.`t1`.`f1`))
FLUSH STATUS;
SELECT * FROM t1,v3 AS v31,v3 WHERE t1.f1=v31.f1 and t1.f1=v3.f1;
f1 f11 f1 f11 f1 f11
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
3 3 3 3 3 3
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
5 5 5 5 5 5
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
9 9 9 9 9 9
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
7 7 7 7 7 7
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 42
Handler_read_last 0
Handler_read_next 252
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 35
explain showing late materialization for views
EXPLAIN EXTENDED SELECT * FROM v1 JOIN v4 ON f1=f2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 NULL ALL NULL NULL NULL NULL 6 33.33 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t2.f2 2 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`v1` join `test`.`t2` where ((`v1`.`f1` = `test`.`t2`.`f2`) and (`test`.`t2`.`f2` in (2,3)))
SELECT * FROM v1 JOIN v4 ON f1=f2;
f1 f11 f2 f22
3 3 3 3
2 2 2 2
merged derived in merged derived
EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2) zz;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7))
SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2) zz;
f1 f11
3 3
5 5
materialized derived in merged derived
EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) zz;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived3> NULL ALL NULL NULL NULL NULL 2 50.00 Using where
3 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` where (`tt`.`f1` > 2)
SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) zz;
f1 f11
3 3
5 5
merged derived in materialized derived
EXPLAIN extended SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2 GROUP BY f1) zz;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 2 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `zz`.`f1` AS `f1`,`zz`.`f11` AS `f11` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where ((`test`.`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7)) group by `test`.`t1`.`f1`) `zz`
SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7) tt WHERE f1 > 2 GROUP BY f1) zz;
f1 f11
3 3
5 5
materialized derived in materialized derived
EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) zz;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 2 100.00 NULL
2 DERIVED <derived3> NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using temporary; Using filesort
3 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `zz`.`f1` AS `f1`,`zz`.`f11` AS `f11` from (/* select#2 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` where (`tt`.`f1` > 2) group by `tt`.`f1`) `zz`
SELECT * FROM (SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) zz;
f1 f11
3 3
5 5
mat in merged derived join mat in merged derived
EXPLAIN EXTENDED SELECT * FROM
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) x
JOIN
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) z
ON x.f1 = z.f1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived3> NULL ALL NULL NULL NULL NULL 2 50.00 Using where
1 PRIMARY <derived5> NULL ref <auto_key0> <auto_key0> 5 tt.f1 2 100.00 NULL
5 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where; Using temporary; Using filesort
3 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11`,`tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` join (/* select#5 */ select `t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` where (`t1`.`f1` < 7) group by `t1`.`f1`) `tt` where ((`tt`.`f1` = `tt`.`f1`) and (`tt`.`f1` > 2) and (`tt`.`f1` > 2))
FLUSH STATUS;
SELECT * FROM
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) x
JOIN
(SELECT * FROM (SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2) z
ON x.f1 = z.f1;
f1 f11 f1 f11
3 3 3 3
5 5 5 5
SHOW STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
Handler_read_next 2
Handler_read_prev 0
Handler_read_rnd 8
Handler_read_rnd_next 29
FLUSH STATUS;
merged in merged derived join merged in merged derived
EXPLAIN EXTENDED SELECT * FROM
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) x
JOIN
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) z
ON x.f1 = z.f1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where; Using join buffer (Block Nested Loop)
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` join `test`.`t1` where ((`t1`.`f1` = `test`.`t1`.`f1`) and (`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7) and (`test`.`t1`.`f1` > 2) and (`test`.`t1`.`f1` < 7))
SELECT * FROM
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) x
JOIN
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 ) tt WHERE f1 > 2 ) z
ON x.f1 = z.f1;
f1 f11 f1 f11
3 3 3 3
5 5 5 5
materialized in materialized derived join
materialized in materialized derived
EXPLAIN EXTENDED SELECT * FROM
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) x
JOIN
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) z
ON x.f1 = z.f1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived4> NULL ref <auto_key0> <auto_key0> 5 x.f1 2 100.00 NULL
4 DERIVED <derived5> NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using temporary; Using filesort
5 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where; Using temporary; Using filesort
2 DERIVED <derived3> NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using temporary; Using filesort
3 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 33.33 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `x`.`f1` AS `f1`,`x`.`f11` AS `f11`,`z`.`f1` AS `f1`,`z`.`f11` AS `f11` from (/* select#2 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where (`test`.`t1`.`f1` < 7) group by `test`.`t1`.`f1`) `tt` where (`tt`.`f1` > 2) group by `tt`.`f1`) `x` join (/* select#4 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#5 */ select `t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` where (`t1`.`f1` < 7) group by `t1`.`f1`) `tt` where (`tt`.`f1` > 2) group by `tt`.`f1`) `z` where (`z`.`f1` = `x`.`f1`)
SELECT * FROM
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) x
JOIN
(SELECT * FROM
(SELECT * FROM t1 WHERE f1 < 7 GROUP BY f1) tt WHERE f1 > 2 GROUP BY f1) z
ON x.f1 = z.f1;
f1 f11 f1 f11
3 3 3 3
5 5 5 5
merged view in materialized derived
EXPLAIN EXTENDED
SELECT * FROM (SELECT * FROM v4 GROUP BY 1) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 6 33.33 Using where; Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `tt`.`f2` AS `f2`,`tt`.`f22` AS `f22` from (/* select#2 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where (`test`.`t2`.`f2` in (2,3)) group by `test`.`t2`.`f2`) `tt`
SELECT * FROM (SELECT * FROM v4 GROUP BY 1) tt;
f2 f22
2 2
3 3
materialized view in merged derived
EXPLAIN EXTENDED
SELECT * FROM ( SELECT * FROM v1 WHERE f1 < 7) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived3> NULL ALL NULL NULL NULL NULL 6 33.33 Using where
3 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1` where (`v1`.`f1` < 7)
SELECT * FROM ( SELECT * FROM v1 WHERE f1 < 7) tt;
f1 f11
1 1
2 2
3 3
5 5
merged view in a merged view in a merged derived
CREATE VIEW v6 AS SELECT * FROM v4 WHERE f2 < 7;
EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM v6) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where ((`test`.`t2`.`f2` < 7) and (`test`.`t2`.`f2` in (2,3)))
SELECT * FROM (SELECT * FROM v6) tt;
f2 f22
3 3
2 2
materialized view in a merged view in a materialized derived
CREATE VIEW v7 AS SELECT * FROM v1;
EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM v7 GROUP BY 1) tt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 6 100.00 NULL
2 DERIVED <derived4> NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
4 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#2 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1` group by `v1`.`f1`) `tt`
SELECT * FROM (SELECT * FROM v7 GROUP BY 1) tt;
f1 f11
1 1
2 2
3 3
5 5
7 7
9 9
JOIN of above two
EXPLAIN EXTENDED SELECT * FROM v6 JOIN v7 ON f2=f1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
1 PRIMARY <derived5> NULL ref <auto_key0> <auto_key0> 5 test.t2.f2 2 100.00 NULL
5 DERIVED t1 NULL ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22`,`v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`t2` join `test`.`v1` where ((`v1`.`f1` = `test`.`t2`.`f2`) and (`test`.`t2`.`f2` < 7) and (`test`.`t2`.`f2` in (2,3)))
SELECT * FROM v6 JOIN v7 ON f2=f1;
f2 f22 f1 f11
3 3 3 3
2 2 2 2
test two keys
CREATE TABLE t3(f3 INT, f33 INT);
INSERT INTO t1 VALUES(6,6),(8,8);
INSERT INTO t3 VALUES(1,1),(2,2),(3,3),(5,5);
EXPLAIN EXTENDED SELECT * FROM t1 JOIN (SELECT * FROM t2) tt ON t1.f1=tt.f2
JOIN t3 ON tt.f22=t3.f3;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 4 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 6 16.67 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 8 12.50 Using where; Using join buffer (Block Nested Loop)
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22`,`test`.`t3`.`f3` AS `f3`,`test`.`t3`.`f33` AS `f33` from `test`.`t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t1`.`f1` = `test`.`t2`.`f2`) and (`test`.`t2`.`f22` = `test`.`t3`.`f3`))
SELECT * FROM t1 JOIN (SELECT * FROM t2) tt ON t1.f1=tt.f2
JOIN t3 ON tt.f22=t3.f3;
f1 f11 f2 f22 f3 f33
1 1 1 1 1 1
2 2 2 2 2 2
3 3 3 3 3 3
DROP TABLE t1,t2,t3;
DROP VIEW v1,v2,v3,v4,v6,v7;
#
#
# BUG#11783262: CRASH IN ITEM_FIELD::ITEM_FIELD IN ITEM.CC ON SUBQUERY
# IN FROM WITH WL5274
#
CREATE TABLE t1 (
col_int_key INT,
col_time_key time,
col_varchar_key VARCHAR(1),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=INNODB;
SELECT alias1.col_time_key AS field1
FROM ( ( SELECT SQ1_alias1.* FROM t1 AS SQ1_alias1 ) AS alias1
INNER JOIN t1 AS alias2
ON (alias2.col_int_key = alias1.col_int_key)
)
WHERE alias1.col_int_key = 207
ORDER BY alias1.col_varchar_key, field1;
field1
DROP TABLE t1;
#
# Bug#11807437: VALGRIND WARNING IN MYSQL_DERIVED_OPTIMIZE() LINE 293
#
CREATE TABLE t1 (
f1 int(11) DEFAULT NULL
);
SELECT 1
FROM (
SELECT 1, 2 FROM DUAL
WHERE EXISTS (
SELECT f1
FROM t1
)) AS tt
;
1
DROP TABLE t1;
#
#
# Bug#11808582: VALGRIND ON WL#5274: INVALID WRITE IN MC_REPLACE_STRMEM.C:493)
#
CREATE TABLE t1 (
pk INT NOT NULL AUTO_INCREMENT,
col_int_key INT,
col_time_key time,
col_varchar_key VARCHAR(1),
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=InnoDB;
SELECT tt.col_time_key
FROM ( ( SELECT * FROM t1 ) AS tt
INNER JOIN t1
ON (t1.col_int_key = tt.col_int_key)
)
WHERE tt.col_int_key = 207
ORDER BY tt.col_varchar_key, tt.pk ASC, 1;
col_time_key
DROP TABLE t1;
#
# Bug#11791677 - ASSERTION FAILED IN JOIN_MATERIALIZE_TABLE IN
# SQL_SELECT.CC ON NESTED SUBQUERY
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
INSERT INTO t1 VALUES (10,8,'v'), (29,4,'c');
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_nokey int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t2 VALUES (16,1,'c'), (20,4,'d');
CREATE TABLE t3 (
`field1` varchar(1) DEFAULT NULL,
`field2` int(11) DEFAULT NULL
);
INSERT INTO t3 VALUES ('m',6),('c',4);
SELECT *
FROM t3
WHERE (field1, field2) IN (
SELECT t1.col_varchar_key AS field1,
t1.col_int_key AS field2
FROM ( t1 INNER JOIN (
SELECT t2.*
FROM t2
WHERE t2.col_int_nokey < t2.pk ) AS alias2
ON (alias2.col_varchar_key = t1.col_varchar_key ) )
GROUP BY field1, field2
ORDER BY t1.col_int_key, t1 .pk DESC )
;
field1 field2
c 4
DROP TABLE t1,t2,t3;
#
#
# Bug#11791705 - CRASH IN JOIN_MATERIALIZE_TABLE OR ASSERTION FAIL:
# !TAB->SAVE_READ_FIRST_RECORD
#
CREATE TABLE t1 (a INTEGER);
INSERT INTO t1 VALUES (NULL),(NULL);
SELECT * FROM t1
WHERE (a, a) NOT IN
(SELECT * FROM (SELECT 8, 4 UNION SELECT 2, 3) tt) ;
a
DROP TABLE t1;
#
# Bug#11791649 - ASSERT: FIXED == 0, IN ITEM.CC ON EXPLAIN WITH VIEW
# IN SUBQUERY
#
CREATE TABLE t1 (pk int);
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (col_varchar_nokey varchar(1));
INSERT INTO t2 VALUES ('m'), ('f');
EXPLAIN SELECT pk
FROM t1
WHERE (2) IN
( SELECT *
FROM (SELECT COUNT(col_varchar_nokey) FROM t2) d
)
;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY <derived3> NULL ALL NULL NULL NULL NULL 1 100.00 Using where; FirstMatch(t1)
3 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '1' AS `pk` from ((/* select#3 */ select count(`test`.`t2`.`col_varchar_nokey`) AS `COUNT(col_varchar_nokey)` from `test`.`t2`) `d`) where (`d`.`COUNT(col_varchar_nokey)` = 2)
DROP TABLE t1,t2;
#
#
# Bug#12735934 - Lost LIMIT clause caused wrong result.
#
CREATE TABLE t1 (f1 VARCHAR(1), key(f1));
INSERT INTO t1 VALUES ('a');
CREATE VIEW v1 AS SELECT f1 FROM t1 ORDER BY 1 LIMIT 0;
SELECT * FROM v1;
f1
DROP VIEW v1;
DROP TABLE t1;
#
#
# Bug#12726927: An outdated assertion caused server failure.
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_nokey int(11) NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (10,1,'v'), (24,18,'h');
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_date_key date NOT NULL,
col_date_nokey date NOT NULL,
col_time_nokey time NOT NULL,
col_varchar_key varchar(1) NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_date_key (col_date_key),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1,'1900-01-01','1900-01-01','00:00:00','k','k');
SELECT OUTR.col_date_key
FROM t2 AS OUTR2
LEFT JOIN t2 AS OUTR ON OUTR2.pk < OUTR.pk
WHERE ( OUTR.col_varchar_nokey , OUTR.col_varchar_key )
IN (
SELECT DISTINCT col_varchar_key , col_varchar_key
FROM t1
WHERE col_int_nokey XOR OUTR.col_time_nokey
)
XOR OUTR.col_date_nokey IS NULL
;
col_date_key
NULL
DROP TABLE t1,t2;
#
#
# Bug#12799731 - CRASH IN END_READ_RECORD.
#
create table t1(f1 char(255) charset utf8);
insert into t1 values('1'),('2'),('3'),('4'),('5'),('6'),('7'),('8'),('9'),('0');
set @save_heap_size= @@max_heap_table_size;
set @@max_heap_table_size= 1;
Warnings:
Warning 1292 Truncated incorrect max_heap_table_size value: '1'
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
flush status;
select count(*) from t1 join (
select t1.f1 from t1 join t1 as t2 join t1 as t3) tt on t1.f1 = tt.f1;
count(*)
1000
show status like 'Handler_write';
Variable_name Value
Handler_write 21
set @@max_heap_table_size= @save_heap_size;
SET @@optimizer_switch= @optimizer_switch_saved;
drop table t1;
#
#
# Bug#12896124: Crash on rqg_mdl_stability test
#
CREATE TABLE t1(f1 INT);
INSERT INTO t1 VALUES (1),(2),(3);
CREATE FUNCTION func1 (param1 INTEGER) RETURNS INT NOT DETERMINISTIC
return param1;
CREATE FUNCTION func2 (param1 INTEGER) RETURNS INT
return param1;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func1(f1);
f1
1
2
3
EXPLAIN SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func1(f1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 3 33.33 Using where
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `tt`.`f1` AS `f1` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1` from `test`.`t1`) `tt` where (`tt`.`f1` = `func1`(`tt`.`f1`))
SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func2(f1);
f1
1
2
3
EXPLAIN SELECT * FROM (SELECT * FROM t1) tt WHERE f1 = func2(f1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 3 33.33 Using where
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `tt`.`f1` AS `f1` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1` from `test`.`t1`) `tt` where (`tt`.`f1` = `func2`(`tt`.`f1`))
SET @@optimizer_switch= @optimizer_switch_saved;
DROP FUNCTION func1;
DROP FUNCTION func2;
DROP TABLE t1;
#
#
# Bug#12909844: Missing type cast caused false assertion
#
CREATE TABLE t1 ( fk INT) ENGINE=INNODB;
CREATE TABLE t2 (
f1 INT, f2 INT, f3 INT, f4 INT, f5 INT, f6 INT,
f7 INT, f8 INT, f9 INT, f10 INT, f11 INT, f12 INT,
f13 INT, f14 INT, f15 INT, f16 INT, f17 INT, f18 INT,
f19 INT, f20 INT, f21 INT, f22 INT, f23 INT, f24 INT,
f25 INT, f26 INT, f27 INT, f28 INT, f29 INT, f30 INT,
f31 INT, f32 TEXT, fk INT) ENGINE=INNODB;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT alias2.fk AS field1 FROM t1 AS alias1 JOIN
(SELECT * FROM t2 ) AS alias2 ON alias1.fk = alias2.fk;
field1
EXPLAIN
SELECT alias2.fk AS field1 FROM t1 AS alias1 JOIN
(SELECT * FROM t2 ) AS alias2 ON alias1.fk = alias2.fk;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY alias1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.alias1.fk 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `alias2`.`fk` AS `field1` from `test`.`t1` `alias1` join (/* select#2 */ select `test`.`t2`.`f1` AS `f1`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f3` AS `f3`,`test`.`t2`.`f4` AS `f4`,`test`.`t2`.`f5` AS `f5`,`test`.`t2`.`f6` AS `f6`,`test`.`t2`.`f7` AS `f7`,`test`.`t2`.`f8` AS `f8`,`test`.`t2`.`f9` AS `f9`,`test`.`t2`.`f10` AS `f10`,`test`.`t2`.`f11` AS `f11`,`test`.`t2`.`f12` AS `f12`,`test`.`t2`.`f13` AS `f13`,`test`.`t2`.`f14` AS `f14`,`test`.`t2`.`f15` AS `f15`,`test`.`t2`.`f16` AS `f16`,`test`.`t2`.`f17` AS `f17`,`test`.`t2`.`f18` AS `f18`,`test`.`t2`.`f19` AS `f19`,`test`.`t2`.`f20` AS `f20`,`test`.`t2`.`f21` AS `f21`,`test`.`t2`.`f22` AS `f22`,`test`.`t2`.`f23` AS `f23`,`test`.`t2`.`f24` AS `f24`,`test`.`t2`.`f25` AS `f25`,`test`.`t2`.`f26` AS `f26`,`test`.`t2`.`f27` AS `f27`,`test`.`t2`.`f28` AS `f28`,`test`.`t2`.`f29` AS `f29`,`test`.`t2`.`f30` AS `f30`,`test`.`t2`.`f31` AS `f31`,`test`.`t2`.`f32` AS `f32`,`test`.`t2`.`fk` AS `fk` from `test`.`t2`) `alias2` where (`alias2`.`fk` = `test`.`alias1`.`fk`)
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2;
#
#
# Bug#12910039: Incorrect merge caused segmentation fault.
#
CREATE TABLE t1 (f1 int) ENGINE=myisam;
CREATE TABLE t2 (f1 text) ENGINE=innodb;
SELECT 1 FROM (
( SELECT * FROM ( SELECT * FROM t2 ) AS alias1 ) AS alias1,
( SELECT * FROM t1 ) AS alias2 );
1
DROP TABLE t1,t2;
#
#
# Bug#12910006: MRR initialization on a derived table caused crash.
#
SET @save_switch= @@SESSION.optimizer_switch;
SET @@SESSION.optimizer_switch="batched_key_access=on,derived_merge=off";
CREATE TABLE t1 ( pk integer auto_increment,
col_blob_key blob, primary key (pk)) ENGINE=innodb;
CREATE TABLE t2 (col_tinytext tinytext null,
pk integer auto_increment, col_text text,
col_blob blob, primary key (pk)) ENGINE=innodb;
SELECT alias1.col_text AS field1 ,
alias1.col_tinytext AS field2
FROM t2 AS alias1
LEFT OUTER JOIN ( SELECT * FROM t1 ) AS alias2 ON alias1.pk = alias2.pk
WHERE alias2.pk >=1 AND alias2.pk < 3
ORDER BY field1,field2 ASC;
field1 field2
SET @@SESSION.optimizer_switch= @save_switch;
DROP TABLE t1, t2;
#
# Bug#13106350: MRR initialization on a derived table caused crash.
#
SET @save_switch= @@optimizer_switch;
SET @@optimizer_switch="materialization=off,derived_merge=off";
CREATE TABLE t1 (pk INTEGER PRIMARY KEY, vc VARCHAR(20));
INSERT INTO t1 VALUES(7, 'seven'), (13, 'thirteen');
CREATE TABLE t2 (pk INTEGER PRIMARY KEY, vc1 VARCHAR(20), vc2 VARCHAR(20));
INSERT INTO t2 VALUES(7, 'seven', 's'), (14, 'fourteen', 'f');
CREATE TABLE t3 (pk INTEGER PRIMARY KEY, vc VARCHAR(20));
INSERT INTO t3 VALUES(5, 'f'), (6, 's'), (7, 's');
explain SELECT derived.vc
FROM (SELECT * FROM t1) AS derived
WHERE derived.vc IN (
SELECT t2.vc1
FROM t2 JOIN t3 ON t2.vc2=t3.vc);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Start temporary
1 PRIMARY t3 NULL ALL NULL NULL NULL NULL 3 33.33 Using where; Using join buffer (Block Nested Loop)
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 23 test.t2.vc1 2 100.00 End temporary
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `derived`.`vc` AS `vc` from (/* select#2 */ select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`vc` AS `vc` from `test`.`t1`) `derived` semi join (`test`.`t2` join `test`.`t3`) where ((`test`.`t3`.`vc` = `test`.`t2`.`vc2`) and (`derived`.`vc` = `test`.`t2`.`vc1`))
SELECT derived.vc
FROM (SELECT * FROM t1) AS derived
WHERE derived.vc IN (
SELECT t2.vc1
FROM t2 JOIN t3 ON t2.vc2=t3.vc);
vc
seven
SET @@optimizer_switch= @save_switch;
DROP TABLE t1, t2, t3;
#
#
# Bug#13107577: Derived table in a semi-join caused failed assertion.
#
SET @save_switch= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
CREATE TABLE t1 (
`col_int_key` int(11) NOT NULL,
`col_varchar_nokey` varchar(1) NOT NULL
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8,'m'), (4,'b'), (4,'x'), (7,'g'), (4,'p');
CREATE VIEW v1 AS SELECT * FROM t1;
SELECT col_int_key
FROM t1
WHERE ( NOT EXISTS (
SELECT col_varchar_nokey
FROM t1
WHERE ( 7 ) IN (
SELECT v1.col_int_key
FROM ( v1 JOIN ( SELECT * FROM t1 ) AS d1
ON ( d1.col_varchar_nokey = v1.col_varchar_nokey ) )
)
) )
;
col_int_key
DROP VIEW v1;
DROP TABLE t1;
SET @@optimizer_switch= @save_switch;
#
# Bug#13105833: Crash when using LooseScan sj-strategy for a view.
#
CREATE TABLE t1 (pk int(11)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (pk int(11)) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1), (2), (3);
CREATE VIEW v1 AS SELECT DISTINCT pk FROM t1;
SELECT pk
FROM t2
WHERE pk IN ( SELECT * FROM v1 ) ;
pk
1
DROP TABLE t1,t2;
DROP VIEW v1;
#
#
# Bug#13261277: Unchecked key length caused missing records.
#
CREATE TABLE t1 (
col_varchar varchar(1024) CHARACTER SET utf8 DEFAULT NULL,
stub1 varchar(1024) CHARACTER SET utf8 DEFAULT NULL,
stub2 varchar(1024) CHARACTER SET utf8 DEFAULT NULL,
stub3 varchar(1024) CHARACTER SET utf8 DEFAULT NULL
);
INSERT INTO t1 VALUES
('d','d','l','ther'),
(NULL,'s','NJBIQ','trzetuchv'),
(-715390976,'coul','MYWFB','cfhtrzetu'),
(1696792576,'f','i\'s','c'),
(1,'i','ltpemcfhtr','gsltpemcf'),
(-663027712,'mgsltpemcf','sa','amgsltpem'),
(-1686700032,'JPRVK','i','vamgsltpe'),
(NULL,'STUNB','UNVJV','u'),
(5,'oka','qyihvamgsl','AXSMD'),
(NULL,'tqwmqyihva','h','yntqwmqyi'),
(3,'EGMJN','e','e');
CREATE TABLE t2 (
col_varchar varchar(10) DEFAULT NULL,
col_int INT DEFAULT NULL
);
INSERT INTO t2 VALUES ('d',9);
SET @save_heap_size= @@max_heap_table_size;
SET @@max_heap_table_size= 16384;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT t2.col_int
FROM t2
RIGHT JOIN ( SELECT * FROM t1 ) AS dt
ON t2.col_varchar = dt.col_varchar
WHERE t2.col_int IS NOT NULL ;
col_int
9
# Shouldn't use auto_key0 for derived table
EXPLAIN
SELECT t2.col_int
FROM t2
RIGHT JOIN ( SELECT * FROM t1 ) AS dt
ON t2.col_varchar = dt.col_varchar
WHERE t2.col_int IS NOT NULL ;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 11 10.00 Using where
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 11 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '9' AS `col_int` from (/* select#2 */ select `test`.`t1`.`col_varchar` AS `col_varchar`,`test`.`t1`.`stub1` AS `stub1`,`test`.`t1`.`stub2` AS `stub2`,`test`.`t1`.`stub3` AS `stub3` from `test`.`t1`) `dt` where (('9' is not null) and (<cache>(convert('d' using utf8)) = `dt`.`col_varchar`))
SET @@max_heap_table_size= @save_heap_size;
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1,t2;
#
#
# Bug#13383857: Another crash in memcpy from
# join_cache::write_record_data with semijoin
#
CREATE TABLE t1 (
col_int_key INT DEFAULT NULL,
col_time_nokey TIME DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
INSERT INTO t1 VALUES
(8,'22:55:23','x','x'),
(7,'10:19:31','d','d'),
(1,'14:40:36','r','r'),
(7,'04:37:47','f','f'),
(9,'19:34:06','y','y'),
(NULL,'20:35:33','u','u'),
(1,NULL,'m','m'),
(9,'14:43:37',NULL,NULL),
(2,'02:23:09','o','o'),
(9,'01:22:45','w','w'),
(2,'00:00:00','m','m'),
(4,'00:13:25','q','q'),
(0,'03:47:16',NULL,NULL),
(4,'01:41:48','d','d'),
(8,'00:00:00','g','g'),
(NULL,'22:32:04','x','x'),
(NULL,'16:44:14','f','f'),
(0,'17:38:37','p','p'),
(NULL,'08:46:48','j','j'),
(8,'14:11:27','c','c');
CREATE TABLE t2 (
col_int_key INT DEFAULT NULL,
col_time_nokey TIME DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
INSERT INTO t2 VALUES
(4,'22:34:09','v','v'),
(62,'14:26:02','v','v'),
(7,'14:03:03','c','c'),
(1,'01:46:09',NULL,NULL),
(0,'16:21:18','x','x'),
(7,'18:56:33','i','i'),
(7,NULL,'e','e'),
(1,'09:29:08','p','p'),
(7,'19:11:10','s','s'),
(1,'11:57:26','j','j'),
(5,'00:39:46','z','z'),
(2,'03:28:15','c','c'),
(0,'06:44:18','a','a'),
(1,'14:36:39','q','q'),
(8,'18:42:45','y','y'),
(1,'02:57:29',NULL,NULL),
(1,'16:46:13','r','r'),
(9,'19:39:02','v','v'),
(1,NULL,NULL,NULL),
(5,'20:58:33','r','r');
CREATE TABLE t3 (
col_int_key INT DEFAULT NULL,
col_time_nokey TIME DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
INSERT INTO t3 VALUES (8,'04:07:22','g','g');
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
explain SELECT col_time_nokey AS x
FROM (SELECT * FROM t2) AS outr
WHERE col_varchar_nokey IN (
SELECT innr.col_varchar_key
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t1) AS innr
ON innr2.col_varchar_key >= innr.col_varchar_key
WHERE outr.col_varchar_nokey = 'e'
)
AND outr.col_varchar_key <> 'r'
;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived4> NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Start temporary
1 PRIMARY <derived5> NULL ref <auto_key0> <auto_key0> 4 const 2 100.00 NULL
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 20 9.00 Using where; End temporary; Using join buffer (Block Nested Loop)
5 DERIVED t1 NULL ALL NULL NULL NULL NULL 20 100.00 NULL
4 DERIVED t3 NULL system NULL NULL NULL NULL 1 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 20 100.00 NULL
Warnings:
Note 1276 Field or reference 'outr.col_varchar_nokey' of SELECT #3 was resolved in SELECT #1
Note 1003 /* select#1 */ select `outr`.`col_time_nokey` AS `x` from (/* select#2 */ select `test`.`t2`.`col_int_key` AS `col_int_key`,`test`.`t2`.`col_time_nokey` AS `col_time_nokey`,`test`.`t2`.`col_varchar_key` AS `col_varchar_key`,`test`.`t2`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t2`) `outr` semi join ((/* select#4 */ select '8' AS `col_int_key`,'04:07:22' AS `col_time_nokey`,'g' AS `col_varchar_key`,'g' AS `col_varchar_nokey` from dual) `innr2` join (/* select#5 */ select `test`.`t1`.`col_int_key` AS `col_int_key`,`test`.`t1`.`col_time_nokey` AS `col_time_nokey`,`test`.`t1`.`col_varchar_key` AS `col_varchar_key`,`test`.`t1`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t1`) `innr`) where ((`innr`.`col_varchar_key` = 'e') and (`outr`.`col_varchar_nokey` = 'e') and (`outr`.`col_varchar_key` <> 'r') and (`innr2`.`col_varchar_key` >= 'e'))
SELECT col_time_nokey AS x
FROM (SELECT * FROM t2) AS outr
WHERE col_varchar_nokey IN (
SELECT innr.col_varchar_key
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t1) AS innr
ON innr2.col_varchar_key >= innr.col_varchar_key
WHERE outr.col_varchar_nokey = 'e'
)
AND outr.col_varchar_key <> 'r'
;
x
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2, t3;
#
# Bug#13354889: Crash on a derived table with more than 64 fields.
#
create table t1 (
field00 int, field01 int, field02 int, field03 int,
field04 int, field05 int, field06 int, field07 int,
field10 int, field11 int, field12 int, field13 int,
field14 int, field15 int, field16 int, field17 int,
field20 int, field21 int, field22 int, field23 int,
field24 int, field25 int, field26 int, field27 int,
field30 int, field31 int, field32 int, field33 int,
field34 int, field35 int, field36 int, field37 int,
field40 int, field41 int, field42 int, field43 int,
field44 int, field45 int, field46 int, field47 int,
field50 int, field51 int, field52 int, field53 int,
field54 int, field55 int, field56 int, field57 int,
field60 int, field61 int, field62 int, field63 int,
field64 int, field65 int, field66 int, field67 int,
field70 int, field71 int, field72 int, field73 int,
field74 int, field75 int, field76 int, field77 int,
field100 int
);
insert into t1(field100) values (1),(2),(3),(4),(5),(6),(7),(8),(9),(0);
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
select tt.field100 from t1 join (select * from t1) tt where t1.field100=tt.field100
limit 1;
field100
1
Should use auto_key0 and ref access.
explain
select tt.field100 from t1 join (select * from t1) tt where t1.field100=tt.field100
limit 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 80 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.field100 8 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 80 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `tt`.`field100` AS `field100` from `test`.`t1` join (/* select#2 */ select `test`.`t1`.`field00` AS `field00`,`test`.`t1`.`field01` AS `field01`,`test`.`t1`.`field02` AS `field02`,`test`.`t1`.`field03` AS `field03`,`test`.`t1`.`field04` AS `field04`,`test`.`t1`.`field05` AS `field05`,`test`.`t1`.`field06` AS `field06`,`test`.`t1`.`field07` AS `field07`,`test`.`t1`.`field10` AS `field10`,`test`.`t1`.`field11` AS `field11`,`test`.`t1`.`field12` AS `field12`,`test`.`t1`.`field13` AS `field13`,`test`.`t1`.`field14` AS `field14`,`test`.`t1`.`field15` AS `field15`,`test`.`t1`.`field16` AS `field16`,`test`.`t1`.`field17` AS `field17`,`test`.`t1`.`field20` AS `field20`,`test`.`t1`.`field21` AS `field21`,`test`.`t1`.`field22` AS `field22`,`test`.`t1`.`field23` AS `field23`,`test`.`t1`.`field24` AS `field24`,`test`.`t1`.`field25` AS `field25`,`test`.`t1`.`field26` AS `field26`,`test`.`t1`.`field27` AS `field27`,`test`.`t1`.`field30` AS `field30`,`test`.`t1`.`field31` AS `field31`,`test`.`t1`.`field32` AS `field32`,`test`.`t1`.`field33` AS `field33`,`test`.`t1`.`field34` AS `field34`,`test`.`t1`.`field35` AS `field35`,`test`.`t1`.`field36` AS `field36`,`test`.`t1`.`field37` AS `field37`,`test`.`t1`.`field40` AS `field40`,`test`.`t1`.`field41` AS `field41`,`test`.`t1`.`field42` AS `field42`,`test`.`t1`.`field43` AS `field43`,`test`.`t1`.`field44` AS `field44`,`test`.`t1`.`field45` AS `field45`,`test`.`t1`.`field46` AS `field46`,`test`.`t1`.`field47` AS `field47`,`test`.`t1`.`field50` AS `field50`,`test`.`t1`.`field51` AS `field51`,`test`.`t1`.`field52` AS `field52`,`test`.`t1`.`field53` AS `field53`,`test`.`t1`.`field54` AS `field54`,`test`.`t1`.`field55` AS `field55`,`test`.`t1`.`field56` AS `field56`,`test`.`t1`.`field57` AS `field57`,`test`.`t1`.`field60` AS `field60`,`test`.`t1`.`field61` AS `field61`,`test`.`t1`.`field62` AS `field62`,`test`.`t1`.`field63` AS `field63`,`test`.`t1`.`field64` AS `field64`,`test`.`t1`.`field65` AS `field65`,`test`.`t1`.`field66` AS `field66`,`test`.`t1`.`field67` AS `field67`,`test`.`t1`.`field70` AS `field70`,`test`.`t1`.`field71` AS `field71`,`test`.`t1`.`field72` AS `field72`,`test`.`t1`.`field73` AS `field73`,`test`.`t1`.`field74` AS `field74`,`test`.`t1`.`field75` AS `field75`,`test`.`t1`.`field76` AS `field76`,`test`.`t1`.`field77` AS `field77`,`test`.`t1`.`field100` AS `field100` from `test`.`t1`) `tt` where (`tt`.`field100` = `test`.`t1`.`field100`) limit 1
SET @@optimizer_switch= @optimizer_switch_saved;
drop table t1;
#
#
# Bug#13390138: crash in memcpy from join_cache::write_record_data
#
CREATE TABLE t1 (
col_varchar_key varchar(1),
col_varchar_nokey varchar(1),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('r','r');
CREATE TABLE t2 (
col_varchar_key varchar(1),
col_varchar_nokey varchar(1),
KEY col_varchar_key (col_varchar_key)
);
INSERT INTO t2 VALUES
(NULL,NULL),
('r','r');
CREATE TABLE t3 (
col_int_key int,
col_varchar_key varchar(1),
col_varchar_nokey varchar(1),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key, col_int_key)
);
INSERT INTO t3 VALUES
(9,'f','f'),
(4,'y','y'),
(3,'u','u'),
(2,'m','m'),
(NULL,NULL,NULL),
(2,'o','o'),
(NULL,'r','r'),
(6,'m','m'),
(7,'q','q'),
(6,'c','c');
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
explain SELECT grandparent.col_varchar_nokey AS g1
FROM (SELECT * FROM t3) AS grandparent
WHERE grandparent.col_varchar_nokey IN
(SELECT parent.col_varchar_key AS p1
FROM (SELECT * FROM t2) AS parent
WHERE grandparent.col_varchar_key IN (
SELECT child1.col_varchar_key AS c1
FROM (SELECT * FROM t1) AS child1
LEFT JOIN (SELECT * FROM t2) AS child2
ON child1.col_varchar_nokey <> child2.col_varchar_key
)
AND grandparent.col_int_key IS UNKNOWN
)
ORDER BY grandparent.col_varchar_nokey;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 const 2 100.00 Using where; Using index; Using temporary; Using filesort; Start temporary
1 PRIMARY <derived6> NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
1 PRIMARY <derived4> NULL ref <auto_key0> <auto_key0> 4 grandparent.col_varchar_nokey 2 100.00 NULL
1 PRIMARY <derived7> NULL ALL NULL NULL NULL NULL 2 100.00 Using where; End temporary; Using join buffer (Block Nested Loop)
7 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
6 DERIVED t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
4 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
2 DERIVED t3 NULL ALL NULL NULL NULL NULL 10 100.00 NULL
Warnings:
Note 1276 Field or reference 'grandparent.col_varchar_key' of SELECT #3 was resolved in SELECT #1
Note 1276 Field or reference 'grandparent.col_int_key' of SELECT #3 was resolved in SELECT #1
Note 1003 /* select#1 */ select `grandparent`.`col_varchar_nokey` AS `g1` from (/* select#2 */ select `test`.`t3`.`col_int_key` AS `col_int_key`,`test`.`t3`.`col_varchar_key` AS `col_varchar_key`,`test`.`t3`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t3`) `grandparent` semi join ((/* select#6 */ select 'r' AS `col_varchar_key`,'r' AS `col_varchar_nokey` from dual) `child1` left join (/* select#7 */ select `test`.`t2`.`col_varchar_key` AS `col_varchar_key`,`test`.`t2`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t2`) `child2` on((`child1`.`col_varchar_nokey` <> `child2`.`col_varchar_key`)) join (/* select#4 */ select `test`.`t2`.`col_varchar_key` AS `col_varchar_key`,`test`.`t2`.`col_varchar_nokey` AS `col_varchar_nokey` from `test`.`t2`) `parent`) where ((`parent`.`col_varchar_key` = `grandparent`.`col_varchar_nokey`) and (`child1`.`col_varchar_key` = `grandparent`.`col_varchar_key`) and isnull(`grandparent`.`col_int_key`)) order by `grandparent`.`col_varchar_nokey`
SELECT grandparent.col_varchar_nokey AS g1
FROM (SELECT * FROM t3) AS grandparent
WHERE grandparent.col_varchar_nokey IN
(SELECT parent.col_varchar_key AS p1
FROM (SELECT * FROM t2) AS parent
WHERE grandparent.col_varchar_key IN (
SELECT child1.col_varchar_key AS c1
FROM (SELECT * FROM t1) AS child1
LEFT JOIN (SELECT * FROM t2) AS child2
ON child1.col_varchar_nokey <> child2.col_varchar_key
)
AND grandparent.col_int_key IS UNKNOWN
)
ORDER BY grandparent.col_varchar_nokey;
g1
r
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2, t3;
#
# Bug#13457552: Crash on instantiating a derived table in a query with
# empty result.
#
CREATE TABLE t1 ( pk INT, col_blob BLOB ) ENGINE = MyISAM;
CREATE TABLE t2 ( pk INT, col_blob BLOB ) ENGINE = InnoDB;
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT pk FROM ( SELECT col_blob, pk FROM t2 ) AS A NATURAL JOIN t1;
pk
EXPLAIN SELECT pk FROM ( SELECT col_blob, pk FROM t2 ) AS a NATURAL JOIN t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `a`.`pk` AS `pk` from (/* select#2 */ select `test`.`t2`.`col_blob` AS `col_blob`,`test`.`t2`.`pk` AS `pk` from `test`.`t2`) `a` join `test`.`t1` where (multiple equal(`a`.`col_blob`, NULL) and multiple equal(`a`.`pk`, NULL))
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1,t2;
#
# Bug #13801019 ASSERTION `0' FAILED IN CREATE_MYISAM_TMP_TABLE
#
CREATE TABLE t1 (a INT, b BLOB) ENGINE=InnoDB;
CREATE TABLE t2 (c INT);
CREATE TABLE t3 (d INT);
INSERT INTO t3 VALUES (0);
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT * FROM (SELECT * FROM t1) AS a1 RIGHT JOIN t3 LEFT JOIN t2 ON d=c ON a=c;
a b d c
NULL NULL 0 NULL
SET @@optimizer_switch= @optimizer_switch_saved;
DROP TABLE t1, t2, t3;
#
# Bug #17814492 - INVALID RESULTS FROM SUBQUERY WITH IN CLAUSE
#
CREATE TABLE t1 (
a INTEGER NOT NULL,
b VARCHAR(1000) NOT NULL,
c TEXT NOT NULL
)ENGINE=InnoDB;
INSERT INTO t1 VALUES (1, 'xxx', 'abc');
INSERT INTO t1 VALUES (2, 'yyy', 'abc');
INSERT INTO t1 SELECT a, b, c FROM t1 WHERE b='yyy';
INSERT INTO t1 SELECT a, b, c FROM t1 WHERE b='yyy';
INSERT INTO t1 SELECT a, b, c FROM t1 WHERE b='yyy';
CREATE TABLE t2 (
a INTEGER NOT NULL
)ENGINE=InnoDB;
INSERT INTO t2 VALUES (1), (2);
ANALYZE TABLE t1,t2;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t2 analyze status OK
SET @save_optimizer_switch= @@optimizer_switch;
SET @@SESSION.optimizer_switch="index_condition_pushdown=on";
EXPLAIN SELECT a1.a, a1.b, a1.c FROM (SELECT a, b, c FROM t1 ) a1
JOIN t2 ON a1.a=t2.a WHERE a1.b='xxx';
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 9 11.11 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`b` = 'xxx'))
SELECT a1.a, a1.b, a1.c FROM (SELECT a, b, c FROM t1 ) a1
JOIN t2 ON a1.a=t2.a WHERE a1.b='xxx';
a b c
1 xxx abc
SET @@SESSION.optimizer_switch= @save_optimizer_switch;
DROP TABLE t2, t1;
# End of test for Bug #17814492
#
# WL#5275 Process subqueries in FROM clause in the same way as view
#
CREATE TABLE t1(a INTEGER, b INTEGER);
CREATE TABLE t2(a INTEGER, b INTEGER);
INSERT INTO t1 VALUES(1, 10), (2, 20);
INSERT INTO t2 VALUES(1, 100), (2, 200);
SELECT *
FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1, (SELECT * FROM t2) AS dt WHERE t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1, (SELECT * FROM t2) AS dt WHERE t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM (t1 JOIN t2 ON t1.a=t2.a) JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
a b a b a b
1 10 1 100 1 100
2 20 2 200 2 200
explain SELECT *
FROM (t1 JOIN t2 ON t1.a=t2.a) JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
a b b a b
1 10 100 1 100
2 20 200 2 200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t1.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt1
ON t1.a=dt1.a AND t2.b=dt1.b
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt2
ON dt1.a=dt2.a;
a b b a b a b
1 10 100 1 100 1 100
2 20 200 2 200 2 200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN
(SELECT t1.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt1
ON t1.a=dt1.a AND t2.b=dt1.b
JOIN
(SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt2
ON dt1.a=dt2.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)
WHERE t1.b > 15) AS dt ON t1.a=dt.a;
a b a b
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)
WHERE t1.b > 15) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`b` > 15))
SELECT *
FROM t1 JOIN (SELECT * FROM t2
WHERE a IN (SELECT a FROM t1)) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2
WHERE a IN (SELECT a FROM t1)) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; FirstMatch(t2); Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` semi join (`test`.`t1`) join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`))
SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION SELECT * FROM t2) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION SELECT * FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
3 UNION t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
NULL UNION RESULT <union2,3> NULL ALL NULL NULL NULL NULL NULL NULL Using temporary
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` union /* select#3 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION ALL SELECT * FROM t2) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
1 10 1 100
2 20 2 200
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 UNION ALL SELECT * FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
3 UNION t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` union all /* select#3 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT DISTINCT a, b FROM t2) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT DISTINCT a, b FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT SUM(a) AS a, SUM(b) AS b FROM t2) AS dt ON t1.a=dt.a;
a b a b
explain SELECT *
FROM t1 JOIN (SELECT SUM(a) AS a, SUM(b) AS b FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'3' AS `a`,'300' AS `b` from `test`.`t1` where (`test`.`t1`.`a` = '3')
SELECT *
FROM t1 JOIN (SELECT a, SUM(b) AS b FROM t2 GROUP BY a) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT a, SUM(b) AS b FROM t2 GROUP BY a) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,sum(`test`.`t2`.`b`) AS `b` from `test`.`t2` group by `test`.`t2`.`a`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT 1 AS a FROM t2 HAVING COUNT(*) > 1) AS dt ON t1.a=dt.a;
a b a
1 10 1
explain SELECT *
FROM t1 JOIN (SELECT 1 AS a FROM t2 HAVING COUNT(*) > 1) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,NULL AS `a` from `test`.`t1` join (/* select#2 */ select 1 AS `a` from `test`.`t2` having (count(0) > 1)) `dt` where multiple equal(`test`.`t1`.`a`, NULL)
SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 1) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 1) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'1' AS `a`,'100' AS `b` from `test`.`t1` where (`test`.`t1`.`a` = '1')
SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 2 OFFSET 1) AS dt ON t1.a=dt.a;
a b a b
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 LIMIT 2 OFFSET 1) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` limit 1,2) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT 1 AS a) AS dt ON t1.a=dt.a;
a b a
1 10 1
explain SELECT *
FROM t1 JOIN (SELECT 1 AS a) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'1' AS `a` from `test`.`t1` where (`test`.`t1`.`a` = '1')
SELECT *
FROM t1 JOIN (SELECT a, b, @c:= a+b FROM t2) AS dt ON t1.a=dt.a;
a b a b @c:= a+b
1 10 1 100 101
2 20 2 200 202
explain SELECT *
FROM t1 JOIN (SELECT a, b, @c:= a+b FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b`,`dt`.`@c:= a+b` AS `@c:= a+b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,(@c:=(`test`.`t2`.`a` + `test`.`t2`.`b`)) AS `@c:= a+b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
a b
1 100
2 200
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`a`
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
a b
2 200
1 100
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`a` desc
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
WHERE dt.a > 0;
a b
1 100
2 200
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
WHERE dt.a > 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (`test`.`t2`.`a` > 0) order by `test`.`t2`.`a`
SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
WHERE dt.a > 0;
a b
2 200
1 100
explain SELECT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
WHERE dt.a > 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where (`test`.`t2`.`a` > 0) order by `test`.`t2`.`a` desc
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
GROUP BY dt.a;
a COUNT(*)
1 1
2 1
explain SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt
GROUP BY dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,count(0) AS `COUNT(*)` from `test`.`t2` group by `test`.`t2`.`a`
SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
GROUP BY dt.a;
a COUNT(*)
1 1
2 1
explain SELECT dt.a, COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt
GROUP BY dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,count(0) AS `COUNT(*)` from `test`.`t2` group by `test`.`t2`.`a`
SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
COUNT(*)
2
explain SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
Warnings:
Note 1003 /* select#1 */ select count(0) AS `COUNT(*)` from `test`.`t2`
SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
COUNT(*)
2
explain SELECT COUNT(*)
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
Warnings:
Note 1003 /* select#1 */ select count(0) AS `COUNT(*)` from `test`.`t2`
SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
a b
1 100
2 200
explain SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a) AS dt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`
SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
a b
1 100
2 200
explain SELECT DISTINCT *
FROM (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary
Warnings:
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a
ORDER BY t1.b;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a) AS dt ON t1.a=dt.a
ORDER BY t1.b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`) order by `test`.`t1`.`b`
SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a
ORDER BY t1.b;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT * FROM t2 ORDER BY t2.a DESC) AS dt ON t1.a=dt.a
ORDER BY t1.b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`) order by `test`.`t1`.`b`
SELECT *
FROM t1 JOIN (SELECT a, (SELECT COUNT(*) FROM t1) AS b FROM t2) AS dt
ON t1.a=dt.a;
a b a b
1 10 1 2
2 20 2 2
explain SELECT *
FROM t1 JOIN (SELECT a, (SELECT COUNT(*) FROM t1) AS b FROM t2) AS dt
ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 PRIMARY t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,(/* select#3 */ select count(0) from `test`.`t1`) AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)
SELECT *
FROM t1 JOIN (SELECT a, (SELECT b) AS b FROM t2) AS dt ON t1.a=dt.a;
a b a b
1 10 1 100
2 20 2 200
explain SELECT *
FROM t1 JOIN (SELECT a, (SELECT b) AS b FROM t2) AS dt ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1276 Field or reference 'test.t2.b' of SELECT #3 was resolved in SELECT #2
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,(/* select#3 */ select `test`.`t2`.`b`) AS `b` from `test`.`t2`) `dt` where (`dt`.`a` = `test`.`t1`.`a`)
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
a b b a b
1 10 100 1 100
2 20 200 2 200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`dt`.`a` AS `a`,`dt`.`b` AS `b` from `test`.`t1` join `test`.`t2` join (/* select#2 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`a`)) `dt` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`dt`.`a` = `test`.`t1`.`a`))
SET @@optimizer_switch="derived_merge=on";
SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
a b b a b
1 10 100 1 100
2 20 200 2 200
explain SELECT *
FROM (t1 JOIN t2 USING (a))
JOIN (SELECT t2.a, t2.b FROM t1 JOIN t2 USING (a)) AS dt
ON t1.a=dt.a;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`a` = `test`.`t1`.`a`))
SET @@optimizer_switch= @optimizer_switch_saved;
INSERT INTO (SELECT * FROM t1) AS dt VALUES(9, 99);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(SELECT * FROM t1) AS dt VALUES(9, 99)' at line 1
INSERT INTO (SELECT * FROM t1) AS dt SELECT 9, 99;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(SELECT * FROM t1) AS dt SELECT 9, 99' at line 1
UPDATE (SELECT * FROM t1) AS dt SET b=b+1;
ERROR HY000: The target table dt of the UPDATE is not updatable
UPDATE t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a SET dt.b=dt.b+1;
ERROR HY000: The target table t2 of the UPDATE is not updatable
DELETE FROM (SELECT * FROM t1) AS dt WHERE a=1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(SELECT * FROM t1) AS dt WHERE a=1' at line 1
DELETE dt FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a WHERE t1.a=1;
ERROR HY000: The target table dt of the DELETE is not updatable
UPDATE t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a SET t1.b=t1.b+1;
DELETE t1 FROM t1 JOIN (SELECT * FROM t2) AS dt ON t1.a=dt.a WHERE t1.a=1;
SELECT * FROM t1;
a b
2 21
SELECT * FROM t2;
a b
1 100
2 200
DROP TABLE t1, t2;
# Bug#19791944: Assert fail in subselect_hash_sj_engine::exec
CREATE TABLE t1 (
pk int NOT NULL,
col_int_key int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key, col_int_key)
);
INSERT INTO t1 VALUES
(1,4,'j'), (2,6,'v'), (3,3,'c'), (4,5,'m'), (5,3,'d'), (6,246,'d'), (7,2,'y'), (8,9,'t'),
(9,3,'d'), (10,8,'s'), (11,1,'r'), (12,8,'m'), (13,8,'b'), (14,5,'x'), (15,7,'g'), (16,5,'p'),
(17,1,'q'), (18,6,'w'), (19,2,'d'), (20,9,'e');
CREATE TABLE t2 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_int_key int NOT NULL,
col_date_key date NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_date_key (col_date_key)
);
INSERT INTO t2 VALUES (1,1,7,'1900-01-01','k');
CREATE TABLE t3 (
pk int NOT NULL ,
col_date_nokey date NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t3 VALUES (10,'1900-01-01','b');
EXPLAIN SELECT outr.col_date_key AS x
FROM (SELECT * FROM t1) AS outr2 LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_varchar_key = outr.col_varchar_nokey
WHERE (outr.col_int_key, outr.col_int_key) IN
(SELECT innr.pk AS x, innr.pk AS y
FROM (SELECT * FROM t3) AS innr
WHERE innr.col_date_nokey IS NOT NULL XOR
innr.col_varchar_nokey > 'p'
ORDER BY innr.col_date_nokey) XOR
(outr.col_int_nokey < 2 OR
NOT outr.col_int_key IS NULL)
ORDER BY outr.col_int_key,
outr.pk;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL index NULL col_varchar_key 7 NULL 20 100.00 Using index; Using temporary; Using filesort
1 PRIMARY t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
4 DEPENDENT SUBQUERY t3 NULL system PRIMARY NULL NULL NULL 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`col_date_key` AS `x` from `test`.`t1` left join (`test`.`t2`) on((`test`.`t2`.`col_varchar_nokey` = `test`.`t1`.`col_varchar_key`)) where (<in_optimizer>((`test`.`t2`.`col_int_key`,`test`.`t2`.`col_int_key`),<exists>(/* select#4 */ select 1,1 from dual where ((('1900-01-01' is not null) xor ('b' > 'p')) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_key`) = '10') or isnull('10')), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_key`) = '10') or isnull('10')), true)) having (<if>(outer_field_is_not_null, <is_not_null_test>('10'), true) and <if>(outer_field_is_not_null, <is_not_null_test>('10'), true)))) xor ((`test`.`t2`.`col_int_nokey` < 2) or (`test`.`t2`.`col_int_key` is not null))) order by `test`.`t2`.`col_int_key`,`test`.`t2`.`pk`
SELECT outr.col_date_key AS x
FROM (SELECT * FROM t1) AS outr2 LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_varchar_key = outr.col_varchar_nokey
WHERE (outr.col_int_key, outr.col_int_key) IN
(SELECT innr.pk AS x, innr.pk AS y
FROM (SELECT * FROM t3) AS innr
WHERE innr.col_date_nokey IS NOT NULL XOR
innr.col_varchar_nokey > 'p'
ORDER BY innr.col_date_nokey) XOR
(outr.col_int_nokey < 2 OR
NOT outr.col_int_key IS NULL)
ORDER BY outr.col_int_key,
outr.pk;
x
DROP TABLE t1, t2, t3;
# Bug#20087645: Assert fail in subselect_hash_sj_engine::exec
CREATE TABLE t1 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key(col_varchar_key)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES
(10,1,'v'), (11,7,'s'), (12,4,'l'), (13,7,'y'), (14,0,'c'), (15,2,'i');
CREATE TABLE t2 (
pk int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1,'k','k');
CREATE TABLE t3 (
pk int NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk)
) ENGINE=InnoDB;
INSERT INTO t3 VALUES
(1,'j'), (2,'v'), (3,'c'), (4,'m'), (5,'d');
ANALYZE TABLE t1, t2, t3;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t2 analyze status OK
test.t3 analyze status OK
EXPLAIN SELECT table1.pk
FROM (SELECT * FROM t1) AS table1
LEFT JOIN
(SELECT * FROM t1) AS table2
RIGHT OUTER JOIN
(SELECT * FROM t2) AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.pk = table2.col_int_nokey
WHERE table3.col_varchar_key <> ALL
(SELECT sq1_t1.col_varchar_nokey AS sq1_field1
FROM (SELECT * FROM t3) AS sq1_t1
LEFT OUTER JOIN
(SELECT * FROM t1) AS sq1_t2
ON sq1_t2.col_varchar_key = sq1_t1.col_varchar_nokey
) OR
table1.pk = 96;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL index PRIMARY col_varchar_key 3 NULL 6 100.00 Using index
1 PRIMARY t2 NULL ALL PRIMARY NULL NULL NULL 1 100.00 Using where
1 PRIMARY t1 NULL ref col_varchar_key col_varchar_key 3 test.t2.col_varchar_nokey 1 100.00 Using where
5 SUBQUERY t3 NULL ALL NULL NULL NULL NULL 5 100.00 NULL
5 SUBQUERY t1 NULL ref col_varchar_key col_varchar_key 3 test.t3.col_varchar_nokey 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` left join (`test`.`t2` join `test`.`t1`) on(((`test`.`t1`.`col_varchar_key` = `test`.`t2`.`col_varchar_nokey`) and (`test`.`t1`.`col_int_nokey` = `test`.`t2`.`pk`))) where ((not(<in_optimizer>(`test`.`t2`.`col_varchar_key`,`test`.`t2`.`col_varchar_key` in ( <materialize> (/* select#5 */ select `test`.`t3`.`col_varchar_nokey` AS `sq1_field1` from `test`.`t3` left join (`test`.`t1`) on((`test`.`t1`.`col_varchar_key` = `test`.`t3`.`col_varchar_nokey`)) where 1 ), <primary_index_lookup>(`test`.`t2`.`col_varchar_key` in <temporary table> on <auto_key> where ((`test`.`t2`.`col_varchar_key` = `materialized-subquery`.`sq1_field1`))))))) or (`test`.`t1`.`pk` = 96))
SELECT table1.pk
FROM (SELECT * FROM t1) AS table1
LEFT JOIN
(SELECT * FROM t1) AS table2
RIGHT OUTER JOIN
(SELECT * FROM t2) AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.pk = table2.col_int_nokey
WHERE table3.col_varchar_key <> ALL
(SELECT sq1_t1.col_varchar_nokey AS sq1_field1
FROM (SELECT * FROM t3) AS sq1_t1
LEFT OUTER JOIN
(SELECT * FROM t1) AS sq1_t2
ON sq1_t2.col_varchar_key = sq1_t1.col_varchar_nokey
) OR
table1.pk = 96;
pk
DROP TABLE t1, t2, t3;
# Bug#19812352: Assert fail in subselect_hash_sj_engine::setup
CREATE TABLE t1 (
col_time_nokey time NOT NULL
);
INSERT INTO t1 VALUES ('00:00:00');
CREATE TABLE t2 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_int_key int NOT NULL,
col_date_nokey date NOT NULL,
col_varchar_key varchar(1) NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key(col_int_key),
KEY col_varchar_key(col_varchar_key, col_int_key)
);
INSERT INTO t2 VALUES
(1,4,0,'0001-01-01','j','j'), (2,6,8,'2004-09-18','v','v'),
(3,3,1,'2009-12-01','c','c'), (4,5,8,'2004-12-17','m','m'),
(5,3,9,'2000-03-14','d','d'), (6,246,24,'2000-10-08','d','d'),
(7,2,6,'2006-05-25','y','y'), (8,9,1,'2008-01-23','t','t'),
(9,3,6,'2007-06-18','d','d'), (10,8,2,'2002-10-13','s','s'),
(11,1,4,'1900-01-01','r','r'), (12,8,8,'0001-01-01','m','m'),
(13,8,4,'2006-03-09','b','b'), (14,5,4,'2001-06-05','x','x'),
(15,7,7,'2006-05-28','g','g'), (16,5,4,'2001-04-19','p','p'),
(17,1,1,'1900-01-01','q','q'), (18,6,9,'2004-08-20','w','w'),
(19,2,4,'2004-10-10','d','d'), (20,9,8,'2000-04-02','e','e');
CREATE TABLE t3 (
pk int NOT NULL,
col_int_key int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key, col_int_key)
);
INSERT INTO t3 VALUES
(10,1,'v'), (11,7,'s'), (12,4,'l'), (13,7,'y'), (14,0,'c'),
(15,2,'i'), (16,9,'h'), (17,4,'q'), (18,0,'a'), (19,9,'v'),
(20,1,'u'), (21,3,'s'), (22,8,'y'), (23,8,'z'), (24,18,'h'),
(25,84,'p'), (26,6,'e'), (27,3,'i'), (28,6,'y'), (29,6,'w');
CREATE TABLE t4 (
pk int NOT NULL,
col_int_nokey int NOT NULL,
col_int_key int NOT NULL,
col_varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
);
INSERT INTO t4 VALUES (10,8,7,'b');
EXPLAIN SELECT outr.pk AS x
FROM (SELECT * FROM t1) AS outr2
LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_time_nokey >= outr.col_date_nokey
WHERE (outr.col_int_nokey, outr.col_int_key) IN
(SELECT innr.col_int_key AS x,
innr.col_int_nokey AS y
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t4) AS innr
ON innr2.col_varchar_key <> innr.col_varchar_nokey
WHERE innr.col_int_key <> innr.pk OR innr.pk = 9
) AND
outr.pk < 7 XOR outr.col_varchar_nokey <> 'i'
ORDER BY outr.col_varchar_key, outr.pk;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 Using filesort
1 PRIMARY t2 NULL ALL NULL NULL NULL NULL 20 21.11 Using where
4 DEPENDENT SUBQUERY t4 NULL system PRIMARY,col_int_key NULL NULL NULL 1 100.00 NULL
4 DEPENDENT SUBQUERY t3 NULL index NULL col_varchar_key 7 NULL 20 90.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`pk` AS `x` from `test`.`t2` where (((<in_optimizer>((`test`.`t2`.`col_int_nokey`,`test`.`t2`.`col_int_key`),<exists>(/* select#4 */ select 1,1 from `test`.`t3` where ((('7' <> '10') or 0) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_nokey`) = '7') or isnull('7')), true) and <if>(outer_field_is_not_null, ((<cache>(`test`.`t2`.`col_int_key`) = '8') or isnull('8')), true) and (`test`.`t3`.`col_varchar_key` <> 'b')) having (<if>(outer_field_is_not_null, <is_not_null_test>('7'), true) and <if>(outer_field_is_not_null, <is_not_null_test>('8'), true)))) and (`test`.`t2`.`pk` < 7)) xor (`test`.`t2`.`col_varchar_nokey` <> 'i')) and ('00:00:00' >= `test`.`t2`.`col_date_nokey`)) order by `test`.`t2`.`col_varchar_key`,`test`.`t2`.`pk`
SELECT outr.pk AS x
FROM (SELECT * FROM t1) AS outr2
LEFT JOIN (SELECT * FROM t2) AS outr
ON outr2.col_time_nokey >= outr.col_date_nokey
WHERE (outr.col_int_nokey, outr.col_int_key) IN
(SELECT innr.col_int_key AS x,
innr.col_int_nokey AS y
FROM (SELECT * FROM t3) AS innr2
LEFT JOIN (SELECT * FROM t4) AS innr
ON innr2.col_varchar_key <> innr.col_varchar_nokey
WHERE innr.col_int_key <> innr.pk OR innr.pk = 9
) AND
outr.pk < 7 XOR outr.col_varchar_nokey <> 'i'
ORDER BY outr.col_varchar_key, outr.pk;
x
13
3
5
6
9
19
20
15
1
4
12
16
17
11
10
8
2
18
14
7
DROP TABLE t1, t2, t3, t4;
# Bug#19811762: Assert fail in JOIN::propagate_dependencies
CREATE TABLE t1 (
pk int NOT NULL
);
CREATE TABLE t2 (
pk int NOT NULL,
col_int_key int DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key, col_int_key)
);
CREATE TABLE t3 (
pk int NOT NULL AUTO_INCREMENT,
col_int_nokey int DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
EXPLAIN SELECT table1.pk
FROM t1 AS table1
RIGHT JOIN
t2 AS table2
LEFT OUTER JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1 INNER JOIN t3 AS sq2_t2
ON sq2_t2.col_int_nokey = sq2_t1.col_int_key
WHERE sq2_t2.col_varchar_nokey <= sq2_t1.col_varchar_key OR
sq2_t2.col_int_nokey <> 2
) AS table3
ON table3.col_int_key = table2.col_int_key
ON table3.pk = table2.col_int_key
WHERE table3.pk >= 6 OR
table1.pk > 68 AND
table1.pk < ( 68 + 76 );
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
Warnings:
Note 1003 /* select#1 */ select NULL AS `pk` from `test`.`t2` `table2` left join (`test`.`t2` `sq2_t1` join `test`.`t3` `sq2_t2`) on((((`test`.`sq2_t2`.`col_varchar_nokey` <= `test`.`sq2_t1`.`col_varchar_key`) or (`test`.`sq2_t2`.`col_int_nokey` <> 2)) and multiple equal(`test`.`sq2_t1`.`col_int_key`, NULL, `test`.`sq2_t2`.`col_int_nokey`))) where ((`test`.`sq2_t1`.`pk` >= 6) or ((NULL > 68) and (NULL < (68 + 76))))
SELECT table1.pk
FROM t1 AS table1
RIGHT JOIN
t2 AS table2
LEFT OUTER JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1 INNER JOIN t3 AS sq2_t2
ON sq2_t2.col_int_nokey = sq2_t1.col_int_key
WHERE sq2_t2.col_varchar_nokey <= sq2_t1.col_varchar_key OR
sq2_t2.col_int_nokey <> 2
) AS table3
ON table3.col_int_key = table2.col_int_key
ON table3.pk = table2.col_int_key
WHERE table3.pk >= 6 OR
table1.pk > 68 AND
table1.pk < ( 68 + 76 );
pk
DROP TABLE t1, t2, t3;
#
# Bug#19793998 ASSERTION FAILED: ROWS >= 0.0 IN
# HANDLER::INDEX_SCAN_COST()
#
SET @optimizer_switch_saved= @@optimizer_switch;
SET @@optimizer_switch="derived_merge=off";
CREATE TABLE t1 (
pk INTEGER PRIMARY KEY
);
INSERT INTO t1 VALUES (0),(1),(2);
CREATE TABLE t2 (
pk INTEGER PRIMARY KEY
);
INSERT INTO t2 VALUES (0),(1),(2);
explain SELECT SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a) FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL index NULL PRIMARY 4 NULL 3 100.00 Using index
2 SUBQUERY <derived3> NULL ALL NULL NULL NULL NULL 3 100.00 NULL
3 DERIVED t2 NULL index NULL PRIMARY 4 NULL 3 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select <in_optimizer>(sha(`test`.`t1`.`pk`),sha(`test`.`t1`.`pk`) in ( <materialize> (/* select#2 */ select `` from (/* select#3 */ select '' AS `` from `test`.`t2`) `a` where 1 ), <primary_index_lookup>(sha(`test`.`t1`.`pk`) in <temporary table> on <auto_key> where ((sha(`test`.`t1`.`pk`) = ``))))) AS `SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a)` from `test`.`t1`
SELECT SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a) FROM t1;
SHA(pk) IN (SELECT * FROM (SELECT '' FROM t2) a)
0
0
0
DROP TABLE t1, t2;
SET @@optimizer_switch= @optimizer_switch_saved;
# Bug#20073930 Assert fail in store_top_level_join_columns
CREATE TABLE t1 (
pk int NOT NULL,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk)
) engine=innodb;
CREATE TABLE t2 (
pk int NOT NULL,
col_int_key int NOT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) engine=innodb;
CREATE TABLE t3 (
pk int NOT NULL,
PRIMARY KEY (pk)
) engine=innodb;
CREATE TABLE t4 (
pk int NOT NULL ,
col_varchar_key varchar(1) NOT NULL,
PRIMARY KEY (pk)
) engine=innodb;
explain SELECT table2.pk AS field2
FROM (SELECT sq1_t2.pk
FROM t1 AS sq1_t1
JOIN
(t1 AS sq1_t2 RIGHT JOIN t2 AS sq1_t3
ON sq1_t3.pk = sq1_t2.pk
)
ON sq1_t3.col_int_key = sq1_t2.pk AND
sq1_t1.col_varchar_key IN
(SELECT child_sq1_t2.col_varchar_key AS child_sq1_field1
FROM t1 AS child_sq1_t2
)
) AS table1
LEFT JOIN
t1 AS table2
JOIN
(SELECT sq2_t1.* FROM t1 AS sq2_t1) AS table3
ON table3.col_varchar_key = table2.col_varchar_key
ON table3.col_varchar_key = table2.col_varchar_key;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE sq1_t1 NULL ALL NULL NULL NULL NULL 1 100.00 NULL
1 SIMPLE sq1_t2 NULL index PRIMARY PRIMARY 4 NULL 1 100.00 Using where; Using index; Using join buffer (Block Nested Loop)
1 SIMPLE sq1_t3 NULL eq_ref PRIMARY,col_int_key PRIMARY 4 test.sq1_t2.pk 1 100.00 Using where
1 SIMPLE child_sq1_t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; FirstMatch(sq1_t3); Using join buffer (Block Nested Loop)
1 SIMPLE table2 NULL ALL NULL NULL NULL NULL 1 100.00 Using join buffer (Block Nested Loop)
1 SIMPLE sq2_t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`table2`.`pk` AS `field2` from `test`.`t1` `sq1_t1` semi join (`test`.`t1` `child_sq1_t2`) join `test`.`t2` `sq1_t3` join `test`.`t1` `sq1_t2` left join (`test`.`t1` `table2` join `test`.`t1` `sq2_t1`) on(((`test`.`sq2_t1`.`col_varchar_key` = `test`.`table2`.`col_varchar_key`))) where ((`test`.`child_sq1_t2`.`col_varchar_key` = `test`.`sq1_t1`.`col_varchar_key`) and (`test`.`sq1_t3`.`col_int_key` = `test`.`sq1_t2`.`pk`) and (`test`.`sq1_t3`.`pk` = `test`.`sq1_t2`.`pk`))
SELECT table2.pk AS field2
FROM (SELECT sq1_t2.pk
FROM t1 AS sq1_t1
JOIN
(t1 AS sq1_t2 RIGHT JOIN t2 AS sq1_t3
ON sq1_t3.pk = sq1_t2.pk
)
ON sq1_t3.col_int_key = sq1_t2.pk AND
sq1_t1.col_varchar_key IN
(SELECT child_sq1_t2.col_varchar_key AS child_sq1_field1
FROM t1 AS child_sq1_t2
)
) AS table1
LEFT JOIN
t1 AS table2
JOIN
(SELECT sq2_t1.* FROM t1 AS sq2_t1) AS table3
ON table3.col_varchar_key = table2.col_varchar_key
ON table3.col_varchar_key = table2.col_varchar_key;
field2
DROP TABLE t1, t2, t3, t4;
# Bug#20118755 Assert fail in JOIN::propagate_dependencies
CREATE TABLE t1 (
pk int NOT NULL ,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
CREATE TABLE t2 (
pk int NOT NULL,
col_int_nokey int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
explain SELECT table1.pk AS field1,
table2.pk field2
FROM (SELECT sq1_t1.*
FROM t1 AS sq1_t1
) AS table1
RIGHT JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1
WHERE sq2_t1.col_int_key NOT IN
(SELECT child_sq1_t1.col_int_key AS child_sq2_field1
FROM t2 AS child_sq1_t1
)
) AS table2
RIGHT JOIN t2 AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.col_varchar_nokey = table2.col_varchar_key;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
4 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
Warnings:
Note 1003 /* select#1 */ select `test`.`sq1_t1`.`pk` AS `field1`,`test`.`sq2_t1`.`pk` AS `field2` from `test`.`t2` `table3` left join (`test`.`t2` `sq2_t1`) on(((not(<in_optimizer>(`test`.`sq2_t1`.`col_int_key`,<exists>(/* select#4 */ select 1 from `test`.`t2` `child_sq1_t1` where <if>(outer_field_is_not_null, ((<cache>(`test`.`sq2_t1`.`col_int_key`) = NULL) or isnull(NULL)), true) having <if>(outer_field_is_not_null, <is_not_null_test>(NULL), true))))) and multiple equal(NULL, `test`.`sq2_t1`.`col_varchar_key`))) left join (`test`.`t1` `sq1_t1`) on(multiple equal(NULL, `test`.`sq2_t1`.`col_varchar_key`))
SELECT table1.pk AS field1,
table2.pk field2
FROM (SELECT sq1_t1.*
FROM t1 AS sq1_t1
) AS table1
RIGHT JOIN
(SELECT sq2_t1.*
FROM t2 AS sq2_t1
WHERE sq2_t1.col_int_key NOT IN
(SELECT child_sq1_t1.col_int_key AS child_sq2_field1
FROM t2 AS child_sq1_t1
)
) AS table2
RIGHT JOIN t2 AS table3
ON table3.col_varchar_nokey = table2.col_varchar_key
ON table3.col_varchar_nokey = table2.col_varchar_key;
field1 field2
DROP TABLE t1, t2;
# Bug#20073366 Assert fail in
# Optimize_table_order::Optimize_straight_join
CREATE TABLE t1 (
pk int NOT NULL,
col_int_nokey int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_date_key date DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key),
KEY col_date_key (col_date_key),
KEY col_varchar_key (col_varchar_key, col_int_key)
);
CREATE TABLE t2 (
pk int NOT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
CREATE TABLE t3 (
pk int NOT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
explain SELECT STRAIGHT_JOIN alias1.col_date_key AS field1
FROM t1 AS alias1
INNER JOIN
((SELECT sq1_alias1.col_varchar_key
FROM t1 AS sq1_alias1 RIGHT OUTER JOIN t2 AS sq1_alias2
ON sq1_alias2.pk = sq1_alias1.col_int_key
WHERE ('n', 'l') IN
(SELECT
c_sq1_alias1.col_varchar_nokey AS c_sq1_field1,
c_sq1_alias1.col_varchar_key AS c_sq1_field2
FROM t3 AS c_sq1_alias1
INNER JOIN
(t1 AS c_sq1_alias2
INNER JOIN t1 AS c_sq1_alias3
ON c_sq1_alias3.col_varchar_key = c_sq1_alias2.col_varchar_key
)
ON c_sq1_alias3.pk = c_sq1_alias2.pk
WHERE c_sq1_alias3.col_int_nokey <> c_sq1_alias2.col_int_nokey
) AND
sq1_alias2.col_varchar_key = 't'
) AS alias2
INNER JOIN t3 AS alias3
ON alias3.col_varchar_nokey = alias2.col_varchar_key
)
ON alias3.col_varchar_key = alias2.col_varchar_key;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
Warnings:
Note 1003 /* select#1 */ select straight_join NULL AS `field1` from `test`.`t1` `alias1` join ((/* select#2 */ select NULL AS `col_varchar_key` from `test`.`t2` `sq1_alias2` semi join (`test`.`t3` `c_sq1_alias1` join `test`.`t1` `c_sq1_alias2` join `test`.`t1` `c_sq1_alias3`) where ((`test`.`c_sq1_alias3`.`col_int_nokey` <> `test`.`c_sq1_alias2`.`col_int_nokey`) and multiple equal('t', NULL) and multiple equal('n', `test`.`c_sq1_alias1`.`col_varchar_nokey`) and multiple equal('l', `test`.`c_sq1_alias1`.`col_varchar_key`) and multiple equal(`test`.`c_sq1_alias3`.`pk`, `test`.`c_sq1_alias2`.`pk`) and multiple equal(`test`.`c_sq1_alias3`.`col_varchar_key`, `test`.`c_sq1_alias2`.`col_varchar_key`)))) `alias2` join `test`.`t3` `alias3` where multiple equal(`test`.`alias3`.`col_varchar_key`, `alias2`.`col_varchar_key`, `test`.`alias3`.`col_varchar_nokey`)
SELECT STRAIGHT_JOIN alias1.col_date_key AS field1
FROM t1 AS alias1
INNER JOIN
((SELECT sq1_alias1.col_varchar_key
FROM t1 AS sq1_alias1 RIGHT OUTER JOIN t2 AS sq1_alias2
ON sq1_alias2.pk = sq1_alias1.col_int_key
WHERE ('n', 'l') IN
(SELECT
c_sq1_alias1.col_varchar_nokey AS c_sq1_field1,
c_sq1_alias1.col_varchar_key AS c_sq1_field2
FROM t3 AS c_sq1_alias1
INNER JOIN
(t1 AS c_sq1_alias2
INNER JOIN t1 AS c_sq1_alias3
ON c_sq1_alias3.col_varchar_key = c_sq1_alias2.col_varchar_key
)
ON c_sq1_alias3.pk = c_sq1_alias2.pk
WHERE c_sq1_alias3.col_int_nokey <> c_sq1_alias2.col_int_nokey
) AND
sq1_alias2.col_varchar_key = 't'
) AS alias2
INNER JOIN t3 AS alias3
ON alias3.col_varchar_nokey = alias2.col_varchar_key
)
ON alias3.col_varchar_key = alias2.col_varchar_key;
field1
DROP TABLE t1, t2, t3;
# Bug#20204415 Assertion failure in TABLE_LIST::set_merged()
CREATE TABLE t(a INTEGER);
CREATE VIEW v AS SELECT * FROM t;
SET optimizer_switch='derived_merge=off';
PREPARE s1 FROM 'SELECT * FROM v';
PREPARE s2 FROM 'SELECT * FROM (SELECT * FROM t) AS dt';
SET optimizer_switch='derived_merge=on';
EXECUTE s1;
a
EXECUTE s2;
a
DEALLOCATE PREPARE s1;
DEALLOCATE PREPARE s2;
DROP VIEW v;
DROP TABLE t;
# Bug#20487336 Assert length > 0 && keyparts != 0 in calc_length_and_key
CREATE TABLE t1
(pk INTEGER PRIMARY KEY,
col_int_nokey INTEGER,
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(1),
KEY col_varchar_key(col_varchar_key)
) engine=innodb;
INSERT INTO t1 (pk) VALUES
(1), (2), (3), (4), (5), (6), (7), (8), (9), (10),
(11), (12), (13), (14), (15), (16), (17), (18), (19), (20);
CREATE TABLE t2
(pk INTEGER PRIMARY KEY,
col_varchar_key VARCHAR(1),
KEY col_varchar_key(col_varchar_key)
) engine=innodb;
INSERT INTO t2 (pk) VALUES
(1), (2), (3), (4), (5), (6), (7), (8), (9), (10),
(11), (12), (13), (14), (15), (16), (17), (18), (19), (20);
CREATE TABLE t3
(pk INTEGER PRIMARY KEY,
col_varchar_key VARCHAR(1),
KEY col_varchar_key(col_varchar_key)
) engine=innodb;
INSERT INTO t3 (pk) VALUES
(1), (2);
ANALYZE TABLE t1, t2, t3;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t2 analyze status OK
test.t3 analyze status OK
explain SELECT MIN(alias1.col_varchar_nokey) AS field1
FROM (SELECT sq1_alias1.*
FROM t1 AS sq1_alias1, t1 AS sq1_alias2
WHERE sq1_alias1.col_varchar_nokey IN
(SELECT c_sq1_alias2.col_varchar_key AS c_sq1_field1
FROM t1 AS c_sq1_alias1 INNER JOIN
t1 AS c_sq1_alias2
ON c_sq1_alias2.col_varchar_nokey = c_sq1_alias1.col_varchar_key
WHERE c_sq1_alias1.col_int_nokey <> c_sq1_alias1.col_int_nokey
) AND
sq1_alias2.pk = sq1_alias1.pk
) AS alias1,
(SELECT sq2_alias1.*
FROM t2 AS sq2_alias1 RIGHT JOIN
t3 AS sq2_alias2
ON sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key
) AS alias2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE sq2_alias2 NULL index NULL col_varchar_key 4 NULL 2 100.00 Using index
1 SIMPLE <subquery3> NULL ALL NULL NULL NULL NULL NULL 100.00 Using join buffer (Block Nested Loop)
1 SIMPLE sq1_alias1 NULL ALL PRIMARY NULL NULL NULL 20 10.00 Using where; Using join buffer (Block Nested Loop)
1 SIMPLE sq1_alias2 NULL eq_ref PRIMARY PRIMARY 4 test.sq1_alias1.pk 1 100.00 Using index
1 SIMPLE sq2_alias1 NULL ref col_varchar_key col_varchar_key 4 test.sq2_alias2.col_varchar_key 20 100.00 Using index
3 MATERIALIZED c_sq1_alias1 NULL ALL col_varchar_key NULL NULL NULL 20 90.00 Using where
3 MATERIALIZED c_sq1_alias2 NULL ALL col_varchar_key NULL NULL NULL 20 10.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select min(`test`.`sq1_alias1`.`col_varchar_nokey`) AS `field1` from `test`.`t1` `sq1_alias1` semi join (`test`.`t1` `c_sq1_alias1` join `test`.`t1` `c_sq1_alias2`) join `test`.`t1` `sq1_alias2` join `test`.`t3` `sq2_alias2` left join `test`.`t2` `sq2_alias1` on((`test`.`sq2_alias1`.`col_varchar_key` = `test`.`sq2_alias2`.`col_varchar_key`)) where ((`test`.`c_sq1_alias2`.`col_varchar_nokey` = `test`.`c_sq1_alias1`.`col_varchar_key`) and (`test`.`sq1_alias1`.`col_varchar_nokey` = `<subquery3>`.`c_sq1_field1`) and (`test`.`sq1_alias2`.`pk` = `test`.`sq1_alias1`.`pk`) and (`test`.`c_sq1_alias1`.`col_int_nokey` <> `test`.`c_sq1_alias1`.`col_int_nokey`))
SELECT MIN(alias1.col_varchar_nokey) AS field1
FROM (SELECT sq1_alias1.*
FROM t1 AS sq1_alias1, t1 AS sq1_alias2
WHERE sq1_alias1.col_varchar_nokey IN
(SELECT c_sq1_alias2.col_varchar_key AS c_sq1_field1
FROM t1 AS c_sq1_alias1 INNER JOIN
t1 AS c_sq1_alias2
ON c_sq1_alias2.col_varchar_nokey = c_sq1_alias1.col_varchar_key
WHERE c_sq1_alias1.col_int_nokey <> c_sq1_alias1.col_int_nokey
) AND
sq1_alias2.pk = sq1_alias1.pk
) AS alias1,
(SELECT sq2_alias1.*
FROM t2 AS sq2_alias1 RIGHT JOIN
t3 AS sq2_alias2
ON sq2_alias2.col_varchar_key = sq2_alias1.col_varchar_key
) AS alias2;
field1
NULL
DROP TABLE t1, t2, t3;
#
# Bug #18607971 : 5.5 TO 5.6 REGRESSION WITH A SUBQUERY IN THE FROM
# CLAUSE.
#
CREATE TABLE t(id INT PRIMARY KEY,
c1 INT, c2 INT, key(c2)) engine=InnoDB;
INSERT INTO t(id, c1, c2) VALUES(1, 2, 3), (2, 3, 4), (3, 3, 4), (4, 3, 4);
ANALYZE TABLE t;
Table Op Msg_type Msg_text
test.t analyze status OK
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3
GROUP BY t1.c1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 4 25.00 Using where
2 DERIVED t2 NULL index NULL c2 5 NULL 4 100.00 Using index; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t1.id, t2.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
2 DERIVED t2 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3 AND t2.c2= 3
GROUP BY t1.c1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t2 NULL ref c2 c2 5 const 1 100.00 Using index
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 4 25.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3 AND t2.c2= 3
GROUP BY t1.c1, t2.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t2 NULL ref c2 c2 5 const 1 100.00 Using index
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 4 25.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3 AND t2.c2= 3
GROUP BY t1.c1, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
2 DERIVED t2 NULL ref c2 c2 5 const 1 100.00 Using index; Using temporary; Using filesort
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 4 25.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `a`.`c1` AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from (/* select#2 */ select `test`.`t1`.`c1` AS `c1` from `test`.`t` `t1` join `test`.`t` `t2` where ((`test`.`t2`.`c2` = 3) and (`test`.`t1`.`c1` = 3)) group by `test`.`t1`.`c1`,`test`.`t1`.`id`) `a` join `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.c1
GROUP BY t2.c1, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 4 25.00 Using where
Warnings:
Note 1003 /* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t2.c1, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
2 DERIVED t2 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t2.c2, t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
2 DERIVED t2 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON t1.id=1 AND t1.c1=t2.id
GROUP BY t1.id, t2.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
2 DERIVED t2 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 INNER JOIN t t3 ON t1.id=1 AND t1.c1=t2.id AND t2.c1=t3.id
GROUP BY t1.id, t2.c2, t3.c2) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
2 DERIVED t2 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
2 DERIVED t3 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT DISTINCT t1.id
FROM t t1
WHERE t1.id= 1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select '1' AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id + 1
FROM t t1 INNER JOIN t t2 ON t1.id= 1
GROUP BY t1.id + 1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 Using index
2 DERIVED t2 NULL index NULL c2 5 NULL 4 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select '2' AS `t1.id + 1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.c1
FROM t t1 INNER JOIN t t2 ON t1.c1= 3
GROUP BY 1.5) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 4 25.00 Using where
2 DERIVED t2 NULL index NULL c2 5 NULL 4 100.00 Using index; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select '3' AS `c1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id
FROM t t1 INNER JOIN t t2 ON mod(t1.id,1000)= 1
GROUP BY t1.id) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 16 100.00 Using join buffer (Block Nested Loop)
2 DERIVED t1 NULL index PRIMARY,c2 c2 5 NULL 4 100.00 Using where; Using index; Using temporary; Using filesort
2 DERIVED t2 NULL index NULL c2 5 NULL 4 100.00 Using index; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `a`.`id` AS `id`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from (/* select#2 */ select `test`.`t1`.`id` AS `id` from `test`.`t` `t1` join `test`.`t` `t2` where ((`test`.`t1`.`id` % 1000) = 1) group by `test`.`t1`.`id`) `a` join `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
EXPLAIN SELECT * FROM
(SELECT t1.id + 1
FROM t t1 INNER JOIN t t2 ON t1.id + 1= 2
GROUP BY t1.id + 1) a, t b
WHERE b.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY b NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t1 NULL index PRIMARY,c2 c2 5 NULL 4 100.00 Using where; Using index
2 DERIVED t2 NULL index NULL c2 5 NULL 4 100.00 Using index; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select '2' AS `t1.id + 1`,`test`.`b`.`id` AS `id`,`test`.`b`.`c1` AS `c1`,`test`.`b`.`c2` AS `c2` from `test`.`t` `b` where (`test`.`b`.`id` between 1 and 10)
CREATE VIEW v1 AS SELECT c1 a FROM t WHERE c1 = 3;
CREATE VIEW v2 AS SELECT c2 b FROM t WHERE c2 > 3;
EXPLAIN SELECT * FROM (SELECT v1.a
FROM v1 LEFT OUTER JOIN v2 ON v1.a = v2.b
GROUP BY v1.a) p, t q
WHERE q.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY q NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t NULL ALL NULL NULL NULL NULL 4 25.00 Using where
2 DERIVED t NULL ref c2 c2 5 const 2 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select '3' AS `a`,`test`.`q`.`id` AS `id`,`test`.`q`.`c1` AS `c1`,`test`.`q`.`c2` AS `c2` from `test`.`t` `q` where (`test`.`q`.`id` between 1 and 10)
DROP VIEW v1;
CREATE VIEW v1 AS SELECT c1 a FROM t;
EXPLAIN SELECT * FROM (SELECT v1.a
FROM v1 LEFT OUTER JOIN v2 ON v1.a = v2.b AND v1.a = 10
GROUP BY v1.a) p, t q
WHERE q.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY q NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 8 100.00 Using join buffer (Block Nested Loop)
2 DERIVED t NULL ALL NULL NULL NULL NULL 4 100.00 Using temporary; Using filesort
2 DERIVED t NULL ref c2 c2 5 const 2 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select `p`.`a` AS `a`,`test`.`q`.`id` AS `id`,`test`.`q`.`c1` AS `c1`,`test`.`q`.`c2` AS `c2` from (/* select#2 */ select `test`.`t`.`c1` AS `a` from `test`.`t` left join (`test`.`t`) on(((`test`.`t`.`c1` = 10) and (`test`.`t`.`c2` = 10) and (10 > 3))) where 1 group by `test`.`t`.`c1`) `p` join `test`.`t` `q` where (`test`.`q`.`id` between 1 and 10)
EXPLAIN SELECT * FROM (SELECT v1.a
FROM v1 LEFT OUTER JOIN v2 ON v1.a = v2.b
WHERE v1.a = 3
GROUP BY v1.a) p, t q
WHERE q.id BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> NULL system NULL NULL NULL NULL 1 100.00 NULL
1 PRIMARY q NULL range PRIMARY PRIMARY 4 NULL 4 100.00 Using where
2 DERIVED t NULL ALL NULL NULL NULL NULL 4 25.00 Using where
2 DERIVED t NULL ref c2 c2 5 const 2 100.00 Using where; Using index
Warnings:
Note 1003 /* select#1 */ select '3' AS `a`,`test`.`q`.`id` AS `id`,`test`.`q`.`c1` AS `c1`,`test`.`q`.`c2` AS `c2` from `test`.`t` `q` where (`test`.`q`.`id` between 1 and 10)
DROP VIEW v1, v2;
DROP TABLE t;
# Bug #20443457 : Assert fail in calc_length_and_keyparts
CREATE TABLE t1(
pk INTEGER PRIMARY KEY,
k INTEGER,
KEY k(k),
nk INTEGER);
INSERT INTO t1 VALUES(1, 10, 100), (2, 20, 200);
set @optimizer_switch_saved=@@optimizer_switch;
set @@optimizer_switch='firstmatch=off';
explain SELECT t1.k
FROM t1 RIGHT JOIN
(SELECT t2.*
FROM t1 AS t2 JOIN t1 AS t3
ON TRUE
WHERE t3.k IN (SELECT k FROM t1 AS t4 WHERE k>1)
) AS dt
ON t1.pk = dt.pk;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index NULL PRIMARY 4 NULL 2 100.00 Using index
1 SIMPLE t1 NULL eq_ref PRIMARY PRIMARY 4 test.t2.pk 1 100.00 NULL
1 SIMPLE t4 NULL index k k 5 NULL 2 100.00 Using where; Using index; LooseScan
1 SIMPLE t3 NULL index k k 5 NULL 2 100.00 Using where; Using index; Using join buffer (Block Nested Loop)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`k` AS `k` from `test`.`t1` `t2` semi join (`test`.`t1` `t4`) join `test`.`t1` `t3` left join `test`.`t1` on((`test`.`t1`.`pk` = `test`.`t2`.`pk`)) where ((`test`.`t3`.`k` = `test`.`t4`.`k`) and (`test`.`t4`.`k` > 1))
SELECT t1.k
FROM t1 RIGHT JOIN
(SELECT t2.*
FROM t1 AS t2 JOIN t1 AS t3
ON TRUE
WHERE t3.k IN (SELECT k FROM t1 AS t4 WHERE k>1)
) AS dt
ON t1.pk = dt.pk;
k
10
20
10
20
SET @@optimizer_switch=@optimizer_switch_saved;
DROP TABLE t1;
# Bug#20733540: Assertion failed: !table || (!table->read_set ...)
CREATE TABLE t1(a INTEGER, b VARCHAR(10));
INSERT INTO t1 VALUES (1,'a');
CREATE TABLE t2(c INTEGER);
INSERT INTO t2 VALUES(0);
SELECT 1
FROM (SELECT b FROM t1 WHERE a) AS dt1
RIGHT JOIN t2
ON c NOT BETWEEN 1 AND 2
NATURAL JOIN t1 AS t3;
1
1
DROP TABLE t1, t2;
# Bug#21512842: Sig 11 in check_column_grant_in_table_ref
CREATE TABLE t1 (
pk INTEGER,
col_varchar JSON NOT NULL,
PRIMARY KEY (pk)
);
CREATE TABLE t2 (
pk INTEGER,
col_date_key DATE NOT NULL,
PRIMARY KEY (pk)
);
set sql_mode='';
Warnings:
Warning 3090 Changing sql mode 'NO_AUTO_CREATE_USER' is deprecated. It will be removed in a future release.
SELECT *
FROM (SELECT alias2.pk AS field1
FROM t1 AS alias1
LEFT OUTER JOIN t2 AS alias2
ON JSON_UNQUOTE(JSON_EXTRACT(alias1.col_varchar,'$.varc'))
COLLATE utf8mb4_general_ci = alias2.col_date_key
GROUP BY JSON_QUOTE(JSON_EXTRACT(field1,'$.intc'))
) AS dt;
field1
set sql_mode=default;
DROP TABLE t1, t2;
# Bug#21350125: Wrong results when ORDER BY is removed
CREATE TABLE t1 (
c1n varchar(1) NOT NULL,
c1k varchar(2) DEFAULT NULL,
KEY c1k (c1k)
);
INSERT INTO t1 VALUES ('j','jj'),('r','rr');
CREATE TABLE t2 (
c2k varchar(1) NOT NULL,
c2n varchar(2) DEFAULT NULL,
KEY c2k (c2k)
);
INSERT INTO t2 VALUES
('f','ff'),('t','tt'),('c','cc'),('c','cc'),('r','rr'),('k','kk');
CREATE TABLE empty (dummy INTEGER);
CREATE VIEW vr AS
SELECT t2.c2n AS v_field
FROM t1 RIGHT JOIN t2
ON t2.c2k = t1.c1k;
CREATE VIEW vl AS
SELECT t2.c2n AS v_field
FROM t2 LEFT JOIN t1
ON t2.c2k = t1.c1k;
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN t2
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
prepare s from 'SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN t2
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field';
execute s;
field1
ff
tt
cc
cc
cc
cc
rr
kk
deallocate prepare s;
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t2 LEFT JOIN t1
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
prepare s from 'SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t2 LEFT JOIN t1
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field';
execute s;
field1
ff
tt
cc
cc
cc
cc
rr
kk
deallocate prepare s;
SELECT alias1.v_field AS field1
FROM vl AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.v_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
SELECT alias1.v_field AS field1
FROM vr AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.v_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN
(empty RIGHT JOIN t2
ON TRUE)
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
SELECT alias1.dt_field AS field1
FROM (SELECT t2.c2n AS dt_field
FROM t1 RIGHT JOIN
(t2 LEFT JOIN empty
ON TRUE)
ON t2.c2k = t1.c1k
) AS alias1
RIGHT JOIN t2 AS alias2
ON alias2.c2n = alias1.dt_field;
field1
ff
tt
cc
cc
cc
cc
rr
kk
DROP VIEW vl, vr;
DROP TABLE t1, t2, empty;
# Bug#22239474: Unexpected error 1093 on nested subquery for update
CREATE TABLE t1 (id INTEGER PRIMARY KEY, d INTEGER);
INSERT INTO t1 VALUES(1, 10), (2, 20);
explain DELETE FROM t1
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 DELETE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> NULL index_subquery <auto_key0> <auto_key0> 4 func 2 100.00 Using index
3 DERIVED t1 NULL index NULL PRIMARY 4 NULL 2 100.00 Using index
DELETE FROM t1
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
INSERT INTO t1 VALUES(1, 10), (2, 20);
explain UPDATE t1 SET d= NULL
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 UPDATE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> NULL index_subquery <auto_key0> <auto_key0> 4 func 2 100.00 Using index
3 DERIVED t1 NULL index NULL PRIMARY 4 NULL 2 100.00 Using index
UPDATE t1 SET d= NULL
WHERE id IN (SELECT * FROM (SELECT id FROM t1) AS dt);
explain INSERT INTO t1 SELECT id+10, d FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 INSERT t1 NULL ALL NULL NULL NULL NULL NULL NULL NULL
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary
INSERT INTO t1 SELECT id+10, d FROM t1;
explain INSERT INTO t1 SELECT id+20, d FROM (SELECT * FROM t1) AS dt;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 INSERT t1 NULL ALL NULL NULL NULL NULL NULL NULL NULL
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 4 100.00 Using temporary
INSERT INTO t1 SELECT id+20, d FROM (SELECT * FROM t1) AS dt;
DROP TABLE t1;
# Bug#22223202: Query with double nested subquery much slower in 5.7
CREATE TABLE t1 (
t1_rowid bigint unsigned NOT NULL,
t1_co varchar(1) NOT NULL,
t1_inv_date char(3) NOT NULL,
UNIQUE KEY rowid (t1_rowid),
KEY invdate (t1_co, t1_inv_date)
);
INSERT INTO t1 VALUES (505975,'D','s:1'),(505981,'D','s:1'),(505869,'D','s:3');
CREATE TABLE t2 (
t2_rowid bigint unsigned NOT NULL,
t2_end_date char(3) NOT NULL,
UNIQUE KEY rowid (t2_rowid),
KEY end_date (t2_end_date)
);
INSERT INTO t2 VALUES (9,'_:L'), (10,'_<2'), (11,'_<N');
explain SELECT t1_inv_date
FROM t1 LEFT JOIN
(SELECT curr.t2_end_date As end_date,
(SELECT prev.t2_end_date
FROM t2 AS prev
WHERE prev.t2_end_date < curr.t2_end_date
ORDER BY prev.t2_end_date DESC LIMIT 1) AS prev_end_date
FROM t2 AS curr
WHERE curr.t2_end_date >= 's:1'
) AS periods
ON periods.prev_end_date < t1_inv_date AND
periods.end_date >= t1_inv_date;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL index NULL invdate 6 NULL 3 100.00 Using index
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (Block Nested Loop)
2 DERIVED curr NULL index end_date end_date 3 NULL 3 100.00 Using where; Using index
3 DEPENDENT SUBQUERY prev NULL index end_date end_date 3 NULL 1 33.33 Using where; Using index
Warnings:
Note 1276 Field or reference 'test.curr.t2_end_date' of SELECT #3 was resolved in SELECT #2
Note 1003 /* select#1 */ select `test`.`t1`.`t1_inv_date` AS `t1_inv_date` from `test`.`t1` left join (/* select#2 */ select `test`.`curr`.`t2_end_date` AS `end_date`,(/* select#3 */ select `test`.`prev`.`t2_end_date` from `test`.`t2` `prev` where (`test`.`prev`.`t2_end_date` < `test`.`curr`.`t2_end_date`) order by `test`.`prev`.`t2_end_date` desc limit 1) AS `prev_end_date` from `test`.`t2` `curr` where (`test`.`curr`.`t2_end_date` >= 's:1')) `periods` on(((`periods`.`prev_end_date` < `test`.`t1`.`t1_inv_date`) and (`periods`.`end_date` >= `test`.`t1`.`t1_inv_date`))) where 1
SELECT t1_inv_date
FROM t1 LEFT JOIN
(SELECT curr.t2_end_date As end_date,
(SELECT prev.t2_end_date
FROM t2 AS prev
WHERE prev.t2_end_date < curr.t2_end_date
ORDER BY prev.t2_end_date DESC LIMIT 1) AS prev_end_date
FROM t2 AS curr
WHERE curr.t2_end_date >= 's:1'
) AS periods
ON periods.prev_end_date < t1_inv_date AND
periods.end_date >= t1_inv_date;
t1_inv_date
s:1
s:1
s:3
DROP TABLE t1, t2;
# Bug#22176604: Wrong result on outer join with uncorrelated subquery
CREATE TABLE t1 (a INT, KEY(a));
INSERT INTO t1 VALUES (1), (NULL);
CREATE TABLE t2 (b INT, KEY(b));
INSERT INTO t2 VALUES (7), (NULL), (1), (5), (8), (6), (4), (0), (3), (NULL);
CREATE TABLE t3 (c INT);
INSERT INTO t3 VALUES (NULL), (1), (5);
explain SELECT * FROM t1 LEFT JOIN (
SELECT t3.* FROM t2 INNER JOIN t3 ON b = c
) AS sq ON a <= sq.c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL a 5 NULL 2 100.00 Using index
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t2 NULL ref b b 5 test.t3.c 2 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t3`.`c` AS `c` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(((`test`.`t2`.`b` = `test`.`t3`.`c`) and (`test`.`t1`.`a` <= `test`.`t3`.`c`))) where 1
SELECT * FROM t1 LEFT JOIN (
SELECT t3.* FROM t2 INNER JOIN t3 ON b = c
) AS sq ON a <= sq.c;
a c
NULL NULL
1 1
1 5
DROP TABLE t1, t2, t3;
# Bug#22343301: Error 1093 (HY000): You can't specify target table'.'
# for update in FROM clause
CREATE TABLE users (
id int unsigned AUTO_INCREMENT,
name varchar(255),
position int DEFAULT NULL,
PRIMARY KEY (id));
INSERT INTO users (name, position) VALUES
('user1','1'), ('user2','2'), ('user3','3'), ('user4','4'), ('user5','5');
# Single-table update with non-mergeable derived table
UPDATE users
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT DISTINCT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
# Single-table update with mergeable derived table
# (but not merged due to being used in a subquery of an UPDATE statement)
UPDATE users
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
# Multi-table update with non-mergeable derived table
UPDATE users, (SELECT 1) AS dummy
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT DISTINCT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
# Multi-table update with mergeable derived table
UPDATE users, (SELECT 1) AS dummy
SET position = (SELECT COUNT(pos) + 1
FROM (SELECT position AS pos FROM users) AS t2
WHERE t2.pos < users.position)
WHERE id = 3;
UPDATE users
SET position = (SELECT COUNT(t2.position) + 1
FROM users AS t2
WHERE t2.position < users.position)
WHERE id = 3;
ERROR HY000: You can't specify target table 'users' for update in FROM clause
UPDATE users, (SELECT 1) AS dummy
SET position = (SELECT COUNT(t2.position) + 1
FROM users AS t2
WHERE t2.position < users.position)
WHERE id = 3;
ERROR HY000: You can't specify target table 'users' for update in FROM clause
DROP TABLE users;
# Bug#23074801: Delete from joined tables with where using derived table
# fails with error 1093
CREATE TABLE t1 (id INTEGER, d1 INTEGER);
CREATE TABLE t2 (id INTEGER, d2 INTEGER);
DELETE t1, t2
FROM t1 LEFT JOIN t2 ON t1.id = t2.id
WHERE t1.id IN (SELECT * FROM (SELECT id FROM t1) AS t1sub);
DROP TABLE t1, t2;
# Bug#22967439: Mysql 5.7 vs 5.6 incorrect SELECT statement result
CREATE TABLE t1
(integer1 INTEGER NULL,
integer2 INTEGER NULL,
varchar1 VARCHAR(255) NULL);
CREATE TABLE t2
(integer1 INTEGER NULL,
integer2 INTEGER NULL,
varchar1 VARCHAR(255) NULL,
varchar2 VARCHAR(255) NULL);
INSERT INTO t1 VALUES
(11,12,'test1'), (21,22,'test2'), (31,32,'test3');
INSERT INTO t2 VALUES
(11,12,'test1','test12'), (21,22,'test2','test22'), (31,32,'test3','test32');
SELECT g_t3.g_f1, g_t3.g_f2, g_t3.g_f3
FROM (SELECT g_t0.integer1 AS g_f1,
g_t0.integer2 AS g_f2,
g_t0.varchar1 AS g_f3
FROM t1 g_t0
) g_t3
GROUP BY g_t3.g_f1, g_t3.g_f2, g_t3.g_f3
HAVING g_t3.g_f3 = (select varchar1
from t2
where integer1 = g_t3.g_f1
);
g_f1 g_f2 g_f3
11 12 test1
21 22 test2
31 32 test3
DROP TABLE t1, t2;
#
# Bug #25343335: DERIVED TABLE SELECT LIST'S REFERENCE TO ALIAS CAUSES
# INCORRECT BEHAVIOR
#
CREATE TABLE t1 (c11 int);
INSERT INTO t1 VALUES (1);
EXPLAIN SELECT *
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1276 Field or reference 'alias1' of SELECT #3 was resolved in SELECT #2
Note 1003 /* select#1 */ select 1 AS `alias1`,(/* select#3 */ select `alias1`) AS `alias2` from dual
SELECT *
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
alias1 alias2
1 1
PREPARE xx FROM 'SELECT *
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ';
EXECUTE xx;
alias1 alias2
1 1
EXECUTE xx;
alias1 alias2
1 1
EXECUTE xx;
alias1 alias2
1 1
EXPLAIN SELECT alias2
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1276 Field or reference 'alias1' of SELECT #3 was resolved in SELECT #2
Note 1003 /* select#1 */ select (/* select#3 */ select `alias1`) AS `alias2` from dual
SELECT alias2
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ;
alias2
1
PREPARE yy FROM 'SELECT alias2
FROM (SELECT (1) alias1,
(SELECT alias1) alias2
FROM t1) X ';
EXECUTE yy;
alias2
1
EXECUTE yy;
alias2
1
EXECUTE yy;
alias2
1
DROP TABLE t1;
#
# Bug#26596977: ASSERT `!(USED_TABS & (~READ_TABLES & ~FILTER_FOR_TABLE))'
# FAILED IN ITEM_FUNC
#
CREATE TABLE t1 (
col_varchar_key varchar(1) ,
pk int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
CREATE TABLE t2 (
col_int int(11) ,
pk int(11) NOT NULL AUTO_INCREMENT,
col_varchar varchar(1) ,
col_varchar_key varchar(1) ,
PRIMARY KEY (pk)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES (4,1,'s','r'), (9,19,'p','a');
CREATE TABLE t3 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int int(11) ,
col_varchar_key varchar(1) ,
col_varchar varchar(1) ,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
INSERT INTO t3 VALUES (100,2,'g',NULL);
EXPLAIN SELECT table1.col_int
FROM t3 AS table1
LEFT JOIN (
SELECT subquery1_t1.*
FROM t1 AS subquery1_t1
RIGHT JOIN t2 AS subquery1_t2
ON (subquery1_t2.col_varchar_key = subquery1_t1.col_varchar_key)
) AS table3
ON (table3.col_varchar_key = table1.col_varchar_key)
WHERE table3.col_varchar_key IN (
SELECT subquery2_t3.col_varchar
FROM t3 AS subquery2_t3
WHERE subquery2_t3.pk < table3.pk
);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
Warnings:
Note 1276 Field or reference 'table3.pk' of SELECT #3 was resolved in SELECT #1
Note 1003 /* select#1 */ select '2' AS `col_int` from `test`.`t2` `subquery1_t2` semi join (`test`.`t3` `subquery2_t3`) join `test`.`t1` `subquery1_t1` where ((`test`.`subquery2_t3`.`pk` < NULL) and multiple equal('g', NULL, `test`.`subquery2_t3`.`col_varchar`, `test`.`subquery1_t2`.`col_varchar_key`))
SELECT table1.col_int
FROM t3 AS table1
LEFT JOIN (
SELECT subquery1_t1.*
FROM t1 AS subquery1_t1
RIGHT JOIN t2 AS subquery1_t2
ON (subquery1_t2.col_varchar_key = subquery1_t1.col_varchar_key)
) AS table3
ON (table3.col_varchar_key = table1.col_varchar_key)
WHERE table3.col_varchar_key IN (
SELECT subquery2_t3.col_varchar
FROM t3 AS subquery2_t3
WHERE subquery2_t3.pk < table3.pk
);
col_int
DROP TABLE t1, t2, t3;
#
# Bug #26618455: ASSERT 'KEYPARTS > 0' IN CALC_LENGTH_AND_KEYPARTS()
# WITHOUT FIRSTMATCH
#
CREATE TABLE t1 (
col_int int(11) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_int_key int(11) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (0,1,'i','n',125);
INSERT INTO t1 VALUES (3,20,'b','o',0);
CREATE TABLE t2 (
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_int int(11) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3,'y','p',4,1);
CREATE TABLE t3 (
col_int int(11) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
col_varchar_key varchar(1) DEFAULT NULL,
col_int_key int(11) DEFAULT NULL,
PRIMARY KEY (pk),
KEY col_int_key (col_int_key)
) ENGINE=MyISAM;
CREATE TABLE t4 ( col_int int(11) DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
pk int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key)
) ENGINE=MyISAM
;
INSERT INTO t4 VALUES (7,'k',9,'z',20);
SET optimizer_switch = 'firstmatch=off';
EXPLAIN SELECT
table2.col_int_key AS field3
FROM
(
SELECT subquery2_t2.*
FROM t1 AS subquery2_t1
INNER JOIN t2 AS subquery2_t2
ON (subquery2_t2.pk = subquery2_t1.col_int)
) AS table1
RIGHT OUTER JOIN (
SELECT subquery3_t1.*
FROM t2 AS subquery3_t1
) AS table2
ON (table1.col_varchar_key = table2.col_varchar_key)
WHERE table1.col_varchar_key IN (
SELECT subquery4_t1.col_varchar AS subquery4_field1
FROM t3 AS subquery4_t1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE subquery2_t2 NULL system PRIMARY,col_varchar_key NULL NULL NULL 1 100.00 NULL
1 SIMPLE subquery3_t1 NULL system col_varchar_key NULL NULL NULL 1 100.00 NULL
1 SIMPLE <subquery4> NULL eq_ref <auto_key> <auto_key> 4 const 1 100.00 Using where
1 SIMPLE subquery2_t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
4 MATERIALIZED subquery4_t1 NULL ALL NULL NULL NULL NULL 0 0.00 Using where
Warnings:
Note 1003 /* select#1 */ select '3' AS `field3` from `test`.`t1` `subquery2_t1` semi join (`test`.`t3` `subquery4_t1`) where ((`test`.`subquery2_t1`.`col_int` = '1') and (`<subquery4>`.`subquery4_field1` = 'y') and (`test`.`subquery4_t1`.`col_varchar` = 'y'))
SELECT
table2.col_int_key AS field3
FROM
(
SELECT subquery2_t2.*
FROM t1 AS subquery2_t1
INNER JOIN t2 AS subquery2_t2
ON (subquery2_t2.pk = subquery2_t1.col_int)
) AS table1
RIGHT OUTER JOIN (
SELECT subquery3_t1.*
FROM t2 AS subquery3_t1
) AS table2
ON (table1.col_varchar_key = table2.col_varchar_key)
WHERE table1.col_varchar_key IN (
SELECT subquery4_t1.col_varchar AS subquery4_field1
FROM t3 AS subquery4_t1);
field3
SET optimizer_switch = default;
DROP TABLE t1, t2, t3, t4;
# Bug#30488700: Mysql chooses different execution plan in 5.7
CREATE TABLE tbl1 (
id BIGINT NOT NULL,
rec_id INTEGER NOT NULL,
id_value2 BIGINT DEFAULT NULL,
PRIMARY KEY (id, rec_id)
) ENGINE=INNODB;
CREATE TABLE tbl2 (
t_id BIGINT NOT NULL,
s_date DATETIME DEFAULT NULL,
PRIMARY KEY (t_id)
) ENGINE=INNODB;
SET @ROWNUM = 0;
SELECT t1.rec_id
FROM tbl1 AS t1 INNER JOIN
(SELECT a.id, a.rec_id,s_date
FROM tbl2 AS b, tbl1 AS a
WHERE a.id_value2 = b.t_id AND a.id = 6889877970355107670
ORDER BY s_date DESC) t2
ON t1.id = t2.id AND t1.rec_id = t2.rec_id;
rec_id
UPDATE tbl1 AS t1 INNER JOIN
(SELECT a.id, a.rec_id, b.s_date
FROM tbl2 AS b, tbl1 AS a
WHERE a.id_value2 = b.t_id AND a.id = 6889877970355107670
ORDER BY s_date DESC) t2
ON t1.id = t2.id AND t1.rec_id = t2.rec_id
SET t1.rec_id = @ROWNUM:= @ROWNUM+1;
explain SELECT t1.rec_id
FROM tbl1 AS t1 INNER JOIN
(SELECT a.id, a.rec_id,s_date
FROM tbl2 AS b, tbl1 AS a
WHERE a.id_value2 = b.t_id AND a.id = 6889877970355107670
ORDER BY s_date DESC) t2
ON t1.id = t2.id AND t1.rec_id = t2.rec_id;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ref PRIMARY PRIMARY 8 const 1 100.00 Using index
1 SIMPLE a NULL eq_ref PRIMARY PRIMARY 12 const,test.t1.rec_id 1 100.00 Using where
1 SIMPLE b NULL eq_ref PRIMARY PRIMARY 8 test.a.id_value2 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`rec_id` AS `rec_id` from `test`.`tbl1` `t1` join `test`.`tbl2` `b` join `test`.`tbl1` `a` where ((`test`.`b`.`t_id` = `test`.`a`.`id_value2`) and (`test`.`a`.`rec_id` = `test`.`t1`.`rec_id`) and (`test`.`t1`.`id` = 6889877970355107670) and (`test`.`a`.`id` = 6889877970355107670))
explain UPDATE tbl1 AS t1 INNER JOIN
(SELECT a.id, a.rec_id, b.s_date
FROM tbl2 AS b, tbl1 AS a
WHERE a.id_value2 = b.t_id AND a.id = 6889877970355107670
ORDER BY s_date DESC) t2
ON t1.id = t2.id AND t1.rec_id = t2.rec_id
SET t1.rec_id = @ROWNUM:= @ROWNUM+1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 UPDATE t1 NULL ALL PRIMARY NULL NULL NULL 1 100.00 NULL
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 12 test.t1.id,test.t1.rec_id 2 100.00 NULL
2 DERIVED a NULL ref PRIMARY PRIMARY 8 const 1 100.00 Using where; Using temporary; Using filesort
2 DERIVED b NULL eq_ref PRIMARY PRIMARY 8 test.a.id_value2 1 100.00 NULL
DROP TABLE tbl1, tbl2;