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1778 lines
68 KiB
1778 lines
68 KiB
drop table if exists t1,t2,t3;
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CREATE TABLE t1 (S1 INT);
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CREATE TABLE t2 (S1 INT);
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INSERT INTO t1 VALUES (1);
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INSERT INTO t2 VALUES (2);
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SELECT * FROM t1 JOIN t2;
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S1 S1
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1 2
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SELECT * FROM t1 INNER JOIN t2;
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S1 S1
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1 2
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SELECT * from t1 JOIN t2 USING (S1);
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S1
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SELECT * FROM t1 INNER JOIN t2 USING (S1);
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S1
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SELECT * from t1 CROSS JOIN t2;
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S1 S1
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1 2
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SELECT * from t1 LEFT JOIN t2 USING(S1);
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S1
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1
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SELECT * from t1 LEFT JOIN t2 ON(t2.S1=2);
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S1 S1
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1 2
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SELECT * from t1 RIGHT JOIN t2 USING(S1);
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S1
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2
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SELECT * from t1 RIGHT JOIN t2 ON(t1.S1=1);
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S1 S1
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1 2
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drop table t1,t2;
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create table t1 (id int primary key);
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create table t2 (id int);
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insert into t1 values (75);
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insert into t1 values (79);
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insert into t1 values (78);
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insert into t1 values (77);
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replace into t1 values (76);
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replace into t1 values (76);
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insert into t1 values (104);
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insert into t1 values (103);
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insert into t1 values (102);
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insert into t1 values (101);
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insert into t1 values (105);
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insert into t1 values (106);
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insert into t1 values (107);
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insert into t2 values (107),(75),(1000);
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select t1.id, t2.id from t1, t2 where t2.id = t1.id;
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id id
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107 107
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75 75
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select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t1.id;
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id count(t2.id)
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107 1
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75 1
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select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t2.id;
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id count(t2.id)
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107 1
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75 1
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select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
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id id
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NULL 75
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explain select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL const PRIMARY NULL NULL NULL 1 100.00 Impossible ON condition
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1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t2`.`id` AS `id` from `test`.`t2` left join `test`.`t1` on(((`test`.`t1`.`id` >= 74) and (`test`.`t1`.`id` <= 0))) where ((`test`.`t2`.`id` = 75) and (`test`.`t1`.`id` is null))
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explain select t1.id, t2.id from t1, t2 where t2.id = t1.id and t1.id <0 and t1.id > 0;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t2`.`id` AS `id` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`id` < 0) and (`test`.`t1`.`id` > 0) and multiple equal(`test`.`t2`.`id`, `test`.`t1`.`id`))
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drop table t1,t2;
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SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
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CREATE TABLE t1 (
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id int(11) NOT NULL auto_increment,
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token varchar(100) DEFAULT '' NOT NULL,
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count int(11) DEFAULT '0' NOT NULL,
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qty int(11),
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phone char(1) DEFAULT '' NOT NULL,
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timestamp datetime DEFAULT '0000-00-00 00:00:00' NOT NULL,
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PRIMARY KEY (id),
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KEY token (token(15)),
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KEY timestamp (timestamp),
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UNIQUE token_2 (token(75),count,phone)
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);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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SET sql_mode = default;
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INSERT INTO t1 VALUES (21,'e45703b64de71482360de8fec94c3ade',3,7800,'n','1999-12-23 17:22:21');
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INSERT INTO t1 VALUES (22,'e45703b64de71482360de8fec94c3ade',4,5000,'y','1999-12-23 17:22:21');
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INSERT INTO t1 VALUES (18,'346d1cb63c89285b2351f0ca4de40eda',3,13200,'b','1999-12-23 11:58:04');
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INSERT INTO t1 VALUES (17,'ca6ddeb689e1b48a04146b1b5b6f936a',4,15000,'b','1999-12-23 11:36:53');
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INSERT INTO t1 VALUES (16,'ca6ddeb689e1b48a04146b1b5b6f936a',3,13200,'b','1999-12-23 11:36:53');
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INSERT INTO t1 VALUES (26,'a71250b7ed780f6ef3185bfffe027983',5,1500,'b','1999-12-27 09:44:24');
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INSERT INTO t1 VALUES (24,'4d75906f3c37ecff478a1eb56637aa09',3,5400,'y','1999-12-23 17:29:12');
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INSERT INTO t1 VALUES (25,'4d75906f3c37ecff478a1eb56637aa09',4,6500,'y','1999-12-23 17:29:12');
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INSERT INTO t1 VALUES (27,'a71250b7ed780f6ef3185bfffe027983',3,6200,'b','1999-12-27 09:44:24');
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INSERT INTO t1 VALUES (28,'a71250b7ed780f6ef3185bfffe027983',3,5400,'y','1999-12-27 09:44:36');
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INSERT INTO t1 VALUES (29,'a71250b7ed780f6ef3185bfffe027983',4,17700,'b','1999-12-27 09:45:05');
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CREATE TABLE t2 (
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id int(11) NOT NULL auto_increment,
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category int(11) DEFAULT '0' NOT NULL,
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county int(11) DEFAULT '0' NOT NULL,
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state int(11) DEFAULT '0' NOT NULL,
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phones int(11) DEFAULT '0' NOT NULL,
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nophones int(11) DEFAULT '0' NOT NULL,
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PRIMARY KEY (id),
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KEY category (category,county,state)
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);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t2 VALUES (3,2,11,12,5400,7800);
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INSERT INTO t2 VALUES (4,2,25,12,6500,11200);
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INSERT INTO t2 VALUES (5,1,37,6,10000,12000);
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select a.id, b.category as catid, b.state as stateid, b.county as countyid from t1 a, t2 b ignore index (primary) where (a.token ='a71250b7ed780f6ef3185bfffe027983') and (a.count = b.id);
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id catid stateid countyid
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27 2 12 11
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28 2 12 11
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29 2 12 25
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26 1 6 37
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select a.id, b.category as catid, b.state as stateid, b.county as
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countyid from t1 a, t2 b where (a.token =
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'a71250b7ed780f6ef3185bfffe027983') and (a.count = b.id) order by a.id;
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id catid stateid countyid
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26 1 6 37
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27 2 12 11
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28 2 12 11
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29 2 12 25
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drop table t1, t2;
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create table t1 (a int primary key);
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insert into t1 values(1),(2);
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select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
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a
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1
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2
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select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a);
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ERROR HY000: Too many tables; MySQL can only use XX tables in a join
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select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a);
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a
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1
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2
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select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a);
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ERROR HY000: Too many tables; MySQL can only use XX tables in a join
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drop table t1;
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CREATE TABLE t1 (
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a int(11) NOT NULL,
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b int(11) NOT NULL,
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PRIMARY KEY (a,b)
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) ENGINE=MyISAM;
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t1 VALUES (1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(2,3);
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CREATE TABLE t2 (
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a int(11) default NULL
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) ENGINE=MyISAM;
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t2 VALUES (2),(3);
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SELECT t1.a,t2.a,b FROM t1,t2 WHERE t1.a=t2.a AND (t1.a=1 OR t1.a=2) AND b>=1 AND b<=3;
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a a b
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2 2 3
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DROP TABLE t1, t2;
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CREATE TABLE t1 (d DATE NOT NULL);
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CREATE TABLE t2 (d DATE NOT NULL);
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INSERT INTO t1 (d) VALUES ('2001-08-01'),('0000-00-00');
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Warnings:
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Warning 1264 Out of range value for column 'd' at row 2
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SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE t2.d IS NULL;
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d
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2001-08-01
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0000-00-00
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SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE d IS NULL;
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d
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0000-00-00
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SELECT * from t1 WHERE t1.d IS NULL;
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d
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0000-00-00
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SELECT * FROM t1 WHERE 1/0 IS NULL;
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d
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2001-08-01
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0000-00-00
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Warnings:
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Warning 1365 Division by 0
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DROP TABLE t1,t2;
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CREATE TABLE t1 (
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Document_ID varchar(50) NOT NULL default '',
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Contractor_ID varchar(6) NOT NULL default '',
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Language_ID char(3) NOT NULL default '',
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Expiration_Date datetime default NULL,
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Publishing_Date datetime default NULL,
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Title text,
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Column_ID varchar(50) NOT NULL default '',
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PRIMARY KEY (Language_ID,Document_ID,Contractor_ID)
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);
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INSERT INTO t1 VALUES ('xep80','1','ger','2001-12-31 20:00:00','2001-11-12 10:58:00','Kartenbestellung - jetzt auch online','anle'),('','999998','',NULL,NULL,NULL,'');
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CREATE TABLE t2 (
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Contractor_ID char(6) NOT NULL default '',
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Language_ID char(3) NOT NULL default '',
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Document_ID char(50) NOT NULL default '',
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CanRead char(1) default NULL,
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Customer_ID int(11) NOT NULL default '0',
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PRIMARY KEY (Contractor_ID,Language_ID,Document_ID,Customer_ID)
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);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t2 VALUES ('5','ger','xep80','1',999999),('1','ger','xep80','1',999999);
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CREATE TABLE t3 (
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Language_ID char(3) NOT NULL default '',
|
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Column_ID char(50) NOT NULL default '',
|
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Contractor_ID char(6) NOT NULL default '',
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|
CanRead char(1) default NULL,
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Active char(1) default NULL,
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PRIMARY KEY (Language_ID,Column_ID,Contractor_ID)
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);
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INSERT INTO t3 VALUES ('ger','home','1','1','1'),('ger','Test','1','0','0'),('ger','derclu','1','0','0'),('ger','clubne','1','0','0'),('ger','philos','1','0','0'),('ger','clubko','1','0','0'),('ger','clubim','1','1','1'),('ger','progra','1','0','0'),('ger','progvo','1','0','0'),('ger','progsp','1','0','0'),('ger','progau','1','0','0'),('ger','progku','1','0','0'),('ger','progss','1','0','0'),('ger','nachl','1','0','0'),('ger','mitgli','1','0','0'),('ger','mitsu','1','0','0'),('ger','mitbus','1','0','0'),('ger','ergmar','1','1','1'),('ger','home','4','1','1'),('ger','derclu','4','1','1'),('ger','clubne','4','0','0'),('ger','philos','4','1','1'),('ger','clubko','4','1','1'),('ger','clubim','4','1','1'),('ger','progra','4','1','1'),('ger','progvo','4','1','1'),('ger','progsp','4','1','1'),('ger','progau','4','0','0'),('ger','progku','4','1','1'),('ger','progss','4','1','1'),('ger','nachl','4','1','1'),('ger','mitgli','4','0','0'),('ger','mitsu','4','0','0'),('ger','mitbus','4','0','0'),('ger','ergmar','4','1','1'),('ger','progra2','1','0','0'),('ger','archiv','4','1','1'),('ger','anmeld','4','1','1'),('ger','thema','4','1','1'),('ger','edito','4','1','1'),('ger','madis','4','1','1'),('ger','enma','4','1','1'),('ger','madis','1','1','1'),('ger','enma','1','1','1'),('ger','vorsch','4','0','0'),('ger','veranst','4','0','0'),('ger','anle','4','1','1'),('ger','redak','4','1','1'),('ger','nele','4','1','1'),('ger','aukt','4','1','1'),('ger','callcenter','4','1','1'),('ger','anle','1','0','0');
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delete from t1 where Contractor_ID='999998';
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insert into t1 (Contractor_ID) Values ('999998');
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SELECT DISTINCT COUNT(t1.Title) FROM t1,
|
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t2, t3 WHERE
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t1.Document_ID='xep80' AND t1.Contractor_ID='1' AND
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t1.Language_ID='ger' AND '2001-12-21 23:14:24' >=
|
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Publishing_Date AND '2001-12-21 23:14:24' <= Expiration_Date AND
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t1.Document_ID = t2.Document_ID AND
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t1.Language_ID = t2.Language_ID AND
|
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t1.Contractor_ID = t2.Contractor_ID AND (
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t2.Customer_ID = '4' OR
|
|
t2.Customer_ID = '999999' OR
|
|
t2.Customer_ID = '1' )AND t2.CanRead
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= '1' AND t1.Column_ID=t3.Column_ID AND
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t1.Language_ID=t3.Language_ID AND (
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|
t3.Contractor_ID = '4' OR
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t3.Contractor_ID = '999999' OR
|
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t3.Contractor_ID = '1') AND
|
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t3.CanRead='1' AND t3.Active='1';
|
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COUNT(t1.Title)
|
|
1
|
|
SELECT DISTINCT COUNT(t1.Title) FROM t1,
|
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t2, t3 WHERE
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t1.Document_ID='xep80' AND t1.Contractor_ID='1' AND
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t1.Language_ID='ger' AND '2001-12-21 23:14:24' >=
|
|
Publishing_Date AND '2001-12-21 23:14:24' <= Expiration_Date AND
|
|
t1.Document_ID = t2.Document_ID AND
|
|
t1.Language_ID = t2.Language_ID AND
|
|
t1.Contractor_ID = t2.Contractor_ID AND (
|
|
t2.Customer_ID = '4' OR
|
|
t2.Customer_ID = '999999' OR
|
|
t2.Customer_ID = '1' )AND t2.CanRead
|
|
= '1' AND t1.Column_ID=t3.Column_ID AND
|
|
t1.Language_ID=t3.Language_ID AND (
|
|
t3.Contractor_ID = '4' OR
|
|
t3.Contractor_ID = '999999' OR
|
|
t3.Contractor_ID = '1') AND
|
|
t3.CanRead='1' AND t3.Active='1';
|
|
COUNT(t1.Title)
|
|
1
|
|
drop table t1,t2,t3;
|
|
CREATE TABLE t1 (
|
|
t1_id int(11) default NULL,
|
|
t2_id int(11) default NULL,
|
|
type enum('Cost','Percent') default NULL,
|
|
cost_unit enum('Cost','Unit') default NULL,
|
|
min_value double default NULL,
|
|
max_value double default NULL,
|
|
t3_id int(11) default NULL,
|
|
item_id int(11) default NULL
|
|
) ENGINE=MyISAM;
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t1 VALUES (12,5,'Percent','Cost',-1,0,-1,-1),(14,4,'Percent','Cost',-1,0,-1,-1),(18,5,'Percent','Cost',-1,0,-1,-1),(19,4,'Percent','Cost',-1,0,-1,-1),(20,5,'Percent','Cost',100,-1,22,291),(21,5,'Percent','Cost',100,-1,18,291),(22,1,'Percent','Cost',100,-1,6,291),(23,1,'Percent','Cost',100,-1,21,291),(24,1,'Percent','Cost',100,-1,9,291),(25,1,'Percent','Cost',100,-1,4,291),(26,1,'Percent','Cost',100,-1,20,291),(27,4,'Percent','Cost',100,-1,7,202),(28,1,'Percent','Cost',50,-1,-1,137),(29,2,'Percent','Cost',100,-1,4,354),(30,2,'Percent','Cost',100,-1,9,137),(93,2,'Cost','Cost',-1,10000000,-1,-1);
|
|
CREATE TABLE t2 (
|
|
id int(10) unsigned NOT NULL auto_increment,
|
|
name varchar(255) default NULL,
|
|
PRIMARY KEY (id)
|
|
) ENGINE=MyISAM;
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t2 VALUES (1,'s1'),(2,'s2'),(3,'s3'),(4,'s4'),(5,'s5');
|
|
select t1.*, t2.* from t1, t2 where t2.id=t1.t2_id limit 2;
|
|
t1_id t2_id type cost_unit min_value max_value t3_id item_id id name
|
|
12 5 Percent Cost -1 0 -1 -1 5 s5
|
|
14 4 Percent Cost -1 0 -1 -1 4 s4
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 (
|
|
siteid varchar(25) NOT NULL default '',
|
|
emp_id varchar(30) NOT NULL default '',
|
|
rate_code varchar(10) default NULL,
|
|
UNIQUE KEY site_emp (siteid,emp_id),
|
|
KEY siteid (siteid)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES ('rivercats','psmith','cust'), ('rivercats','KWalker','cust');
|
|
CREATE TABLE t2 (
|
|
siteid varchar(25) NOT NULL default '',
|
|
rate_code varchar(10) NOT NULL default '',
|
|
base_rate float NOT NULL default '0',
|
|
PRIMARY KEY (siteid,rate_code),
|
|
FULLTEXT KEY rate_code (rate_code)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES ('rivercats','cust',20);
|
|
SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND lr.siteid = 'rivercats';
|
|
rate_code base_rate
|
|
cust 20
|
|
SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE lr.siteid = 'rivercats' AND emp.emp_id = 'psmith';
|
|
rate_code base_rate
|
|
cust 20
|
|
SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND siteid = 'rivercats';
|
|
rate_code base_rate
|
|
cust 20
|
|
SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE siteid = 'rivercats' AND emp.emp_id = 'psmith';
|
|
rate_code base_rate
|
|
cust 20
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 (ID INTEGER NOT NULL PRIMARY KEY, Value1 VARCHAR(255));
|
|
CREATE TABLE t2 (ID INTEGER NOT NULL PRIMARY KEY, Value2 VARCHAR(255));
|
|
INSERT INTO t1 VALUES (1, 'A');
|
|
INSERT INTO t2 VALUES (1, 'B');
|
|
SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND (Value1 = 'A' AND Value2 <> 'B');
|
|
ID Value1 Value2
|
|
SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND Value1 = 'A' AND Value2 <> 'B';
|
|
ID Value1 Value2
|
|
SELECT * FROM t1 NATURAL JOIN t2 WHERE (Value1 = 'A' AND Value2 <> 'B') AND 1;
|
|
ID Value1 Value2
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 (a int);
|
|
CREATE TABLE t2 (b int);
|
|
CREATE TABLE t3 (c int);
|
|
SELECT * FROM t1 NATURAL JOIN t2 NATURAL JOIN t3;
|
|
a b c
|
|
DROP TABLE t1, t2, t3;
|
|
create table t1 (i int);
|
|
create table t2 (i int);
|
|
create table t3 (i int);
|
|
insert into t1 values(1),(2);
|
|
insert into t2 values(2),(3);
|
|
insert into t3 values (2),(4);
|
|
select * from t1 natural left join t2;
|
|
i
|
|
1
|
|
2
|
|
select * from t1 left join t2 on (t1.i=t2.i);
|
|
i i
|
|
1 NULL
|
|
2 2
|
|
select * from t1 natural left join t2 natural left join t3;
|
|
i
|
|
1
|
|
2
|
|
select * from t1 left join t2 on (t1.i=t2.i) left join t3 on (t2.i=t3.i);
|
|
i i i
|
|
1 NULL NULL
|
|
2 2 2
|
|
select * from t3 natural right join t2;
|
|
i
|
|
2
|
|
3
|
|
select * from t3 right join t2 on (t3.i=t2.i);
|
|
i i
|
|
2 2
|
|
NULL 3
|
|
select * from t3 natural right join t2 natural right join t1;
|
|
i
|
|
1
|
|
2
|
|
select * from t3 right join t2 on (t3.i=t2.i) right join t1 on (t2.i=t1.i);
|
|
i i i
|
|
2 2 2
|
|
NULL NULL 1
|
|
select * from t1,t2 natural left join t3 order by t1.i,t2.i,t3.i;
|
|
i i
|
|
1 2
|
|
1 3
|
|
2 2
|
|
2 3
|
|
select * from t1,t2 left join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
|
|
i i i
|
|
1 2 2
|
|
1 3 NULL
|
|
2 2 2
|
|
2 3 NULL
|
|
select t1.i,t2.i,t3.i from t2 natural left join t3,t1 order by t1.i,t2.i,t3.i;
|
|
i i i
|
|
1 2 2
|
|
1 3 NULL
|
|
2 2 2
|
|
2 3 NULL
|
|
select t1.i,t2.i,t3.i from t2 left join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
|
|
i i i
|
|
1 2 2
|
|
1 3 NULL
|
|
2 2 2
|
|
2 3 NULL
|
|
select * from t1,t2 natural right join t3 order by t1.i,t2.i,t3.i;
|
|
i i
|
|
1 4
|
|
1 2
|
|
2 4
|
|
2 2
|
|
select * from t1,t2 right join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
|
|
i i i
|
|
1 NULL 4
|
|
1 2 2
|
|
2 NULL 4
|
|
2 2 2
|
|
select t1.i,t2.i,t3.i from t2 natural right join t3,t1 order by t1.i,t2.i,t3.i;
|
|
i i i
|
|
1 NULL 4
|
|
1 2 2
|
|
2 NULL 4
|
|
2 2 2
|
|
select t1.i,t2.i,t3.i from t2 right join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
|
|
i i i
|
|
1 NULL 4
|
|
1 2 2
|
|
2 NULL 4
|
|
2 2 2
|
|
drop table t1,t2,t3;
|
|
CREATE TABLE t1 (a int, b int default 0, c int default 1);
|
|
INSERT INTO t1 (a) VALUES (1),(2),(3),(4),(5),(6),(7),(8);
|
|
INSERT INTO t1 (a) SELECT a + 8 FROM t1;
|
|
INSERT INTO t1 (a) SELECT a + 16 FROM t1;
|
|
CREATE TABLE t2 (a int, d int, e int default 0);
|
|
INSERT INTO t2 (a, d) VALUES (1,1),(2,2),(3,3),(4,4);
|
|
INSERT INTO t2 (a, d) SELECT a+4, a+4 FROM t2;
|
|
INSERT INTO t2 (a, d) SELECT a+8, a+8 FROM t2;
|
|
EXPLAIN
|
|
SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
|
|
ORDER BY t1.b, t1.c;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 32 100.00 Using temporary; Using filesort
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 16 6.25 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select straight_join `test`.`t2`.`e` AS `e` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`e` = `test`.`t1`.`b`) and (`test`.`t2`.`d` = 1)) order by `test`.`t1`.`b`,`test`.`t1`.`c`
|
|
SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
|
|
ORDER BY t1.b, t1.c;
|
|
e
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
0
|
|
DROP TABLE t1,t2;
|
|
create table t1 (c int, b int);
|
|
create table t2 (a int, b int);
|
|
create table t3 (b int, c int);
|
|
create table t4 (y int, c int);
|
|
create table t5 (y int, z int);
|
|
create table t6 (a int, c int);
|
|
insert into t1 values (10,1);
|
|
insert into t1 values (3 ,1);
|
|
insert into t1 values (3 ,2);
|
|
insert into t2 values (2, 1);
|
|
insert into t3 values (1, 3);
|
|
insert into t3 values (1,10);
|
|
insert into t4 values (11,3);
|
|
insert into t4 values (2, 3);
|
|
insert into t5 values (11,4);
|
|
insert into t6 values (2, 3);
|
|
create algorithm=merge view v1a as
|
|
select * from t1 natural join t2;
|
|
create algorithm=merge view v1b(a,b,c) as
|
|
select * from t1 natural join t2;
|
|
create algorithm=merge view v1c as
|
|
select b as a, c as b, a as c from t1 natural join t2;
|
|
create algorithm=merge view v1d(b, a, c) as
|
|
select a as c, c as b, b as a from t1 natural join t2;
|
|
create algorithm=merge view v2a as
|
|
select t1.c, t1.b, t2.a from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c;
|
|
create algorithm=merge view v2b as
|
|
select t1.c as b, t1.b as a, t2.a as c
|
|
from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c;
|
|
create algorithm=merge view v3a as
|
|
select * from t1 natural join t2 natural join t3;
|
|
create algorithm=merge view v3b as
|
|
select * from t1 natural join (t2 natural join t3);
|
|
create algorithm=merge view v4 as
|
|
select * from v2a natural join v3a;
|
|
select * from (t1 natural join t2) natural join (t3 natural join t4);
|
|
b c a y
|
|
1 3 2 11
|
|
1 3 2 2
|
|
select * from (t1 natural join t2) natural left join (t3 natural join t4);
|
|
b c a y
|
|
1 10 2 NULL
|
|
1 3 2 11
|
|
1 3 2 2
|
|
select * from (t3 natural join t4) natural right join (t1 natural join t2);
|
|
b c a y
|
|
1 10 2 NULL
|
|
1 3 2 11
|
|
1 3 2 2
|
|
select * from (t1 natural left join t2) natural left join (t3 natural left join t4);
|
|
b c a y
|
|
1 10 2 NULL
|
|
1 3 2 11
|
|
1 3 2 2
|
|
2 3 NULL NULL
|
|
select * from (t4 natural right join t3) natural right join (t2 natural right join t1);
|
|
b c a y
|
|
1 10 2 NULL
|
|
1 3 2 11
|
|
1 3 2 2
|
|
2 3 NULL NULL
|
|
select * from t1 natural join t2 natural join t3 natural join t4;
|
|
c b a y
|
|
3 1 2 11
|
|
3 1 2 2
|
|
select * from ((t1 natural join t2) natural join t3) natural join t4;
|
|
c b a y
|
|
3 1 2 11
|
|
3 1 2 2
|
|
select * from t1 natural join (t2 natural join (t3 natural join t4));
|
|
c b a y
|
|
3 1 2 11
|
|
3 1 2 2
|
|
select * from t5 natural right join (t4 natural right join ((t2 natural right join t1) natural right join t3));
|
|
y c b a z
|
|
11 3 1 2 4
|
|
2 3 1 2 NULL
|
|
NULL 10 1 2 NULL
|
|
select * from (t1 natural join t2), (t3 natural join t4);
|
|
b c a c b y
|
|
1 10 2 3 1 11
|
|
1 3 2 3 1 11
|
|
1 10 2 3 1 2
|
|
1 3 2 3 1 2
|
|
select * from t5 natural join ((t1 natural join t2), (t3 natural join t4));
|
|
y z b c a c b
|
|
11 4 1 10 2 3 1
|
|
11 4 1 3 2 3 1
|
|
select * from ((t1 natural join t2), (t3 natural join t4)) natural join t5;
|
|
y b c a c b z
|
|
11 1 10 2 3 1 4
|
|
11 1 3 2 3 1 4
|
|
select * from t5 natural join ((t1 natural join t2) cross join (t3 natural join t4));
|
|
y z b c a c b
|
|
11 4 1 10 2 3 1
|
|
11 4 1 3 2 3 1
|
|
select * from ((t1 natural join t2) cross join (t3 natural join t4)) natural join t5;
|
|
y b c a c b z
|
|
11 1 10 2 3 1 4
|
|
11 1 3 2 3 1 4
|
|
select * from (t1 join t2 using (b)) join (t3 join t4 using (c)) using (c);
|
|
c b a b y
|
|
3 1 2 1 11
|
|
3 1 2 1 2
|
|
select * from (t1 join t2 using (b)) natural join (t3 join t4 using (c));
|
|
b c a y
|
|
1 3 2 11
|
|
1 3 2 2
|
|
select a,b,c from (t1 natural join t2) natural join (t3 natural join t4)
|
|
where b + 1 = y or b + 10 = y group by b,c,a having min(b) < max(y) order by a;
|
|
a b c
|
|
2 1 3
|
|
select * from (t1 natural join t2) natural left join (t3 natural join t4)
|
|
where b + 1 = y or b + 10 = y group by b,c,a,y having min(b) < max(y) order by a, y;
|
|
b c a y
|
|
1 3 2 2
|
|
1 3 2 11
|
|
select * from (t3 natural join t4) natural right join (t1 natural join t2)
|
|
where b + 1 = y or b + 10 = y group by b,c,a,y having min(b) < max(y) order by a, y;
|
|
b c a y
|
|
1 3 2 2
|
|
1 3 2 11
|
|
select * from t1 natural join t2 where t1.c > t2.a;
|
|
b c a
|
|
1 10 2
|
|
1 3 2
|
|
select * from t1 natural join t2 where t1.b > t2.b;
|
|
b c a
|
|
select * from t1 natural left join (t4 natural join t5) where t5.z is not NULL;
|
|
c b y z
|
|
3 1 11 4
|
|
3 2 11 4
|
|
select * from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c;
|
|
c b a b y c
|
|
3 1 2 1 2 3
|
|
3 2 2 1 2 3
|
|
select * from (t2 join t4 on b + 1 = y) join t1 on t1.c = t4.c;
|
|
a b y c c b
|
|
2 1 2 3 3 1
|
|
2 1 2 3 3 2
|
|
select * from t1 natural join (t2 join t4 on b + 1 = y);
|
|
c b a y
|
|
3 1 2 2
|
|
select * from (t1 cross join t2) join (t3 cross join t4) on (a < y and t2.b < t3.c);
|
|
c b a b b c y c
|
|
10 1 2 1 1 3 11 3
|
|
10 1 2 1 1 10 11 3
|
|
3 1 2 1 1 3 11 3
|
|
3 1 2 1 1 10 11 3
|
|
3 2 2 1 1 3 11 3
|
|
3 2 2 1 1 10 11 3
|
|
select * from (t1, t2) join (t3, t4) on (a < y and t2.b < t3.c);
|
|
c b a b b c y c
|
|
10 1 2 1 1 3 11 3
|
|
10 1 2 1 1 10 11 3
|
|
3 1 2 1 1 3 11 3
|
|
3 1 2 1 1 10 11 3
|
|
3 2 2 1 1 3 11 3
|
|
3 2 2 1 1 10 11 3
|
|
select * from (t1 natural join t2) join (t3 natural join t4) on a = y;
|
|
b c a c b y
|
|
1 10 2 3 1 2
|
|
1 3 2 3 1 2
|
|
select * from ((t3 join (t1 join t2 on c > a) on t3.b < t2.a) join t4 on y > t1.c) join t5 on z = t1.b + 3;
|
|
b c c b a b y c y z
|
|
1 3 10 1 2 1 11 3 11 4
|
|
1 10 10 1 2 1 11 3 11 4
|
|
1 3 3 1 2 1 11 3 11 4
|
|
1 10 3 1 2 1 11 3 11 4
|
|
select * from t1 natural join t2 where t1.b > 0;
|
|
b c a
|
|
1 10 2
|
|
1 3 2
|
|
select * from t1 natural join (t4 natural join t5) where t4.y > 7;
|
|
c b y z
|
|
3 1 11 4
|
|
3 2 11 4
|
|
select * from (t4 natural join t5) natural join t1 where t4.y > 7;
|
|
c y z b
|
|
3 11 4 1
|
|
3 11 4 2
|
|
select * from t1 natural left join (t4 natural join t5) where t4.y > 7;
|
|
c b y z
|
|
3 1 11 4
|
|
3 2 11 4
|
|
select * from (t4 natural join t5) natural right join t1 where t4.y > 7;
|
|
c b y z
|
|
3 1 11 4
|
|
3 2 11 4
|
|
select * from (t1 natural join t2) join (t3 natural join t4) on t1.b = t3.b;
|
|
b c a c b y
|
|
1 10 2 3 1 11
|
|
1 10 2 3 1 2
|
|
1 3 2 3 1 11
|
|
1 3 2 3 1 2
|
|
select t1.*, t2.* from t1 natural join t2;
|
|
c b a b
|
|
10 1 2 1
|
|
3 1 2 1
|
|
select t1.*, t2.*, t3.*, t4.* from (t1 natural join t2) natural join (t3 natural join t4);
|
|
c b a b b c y c
|
|
3 1 2 1 1 3 11 3
|
|
3 1 2 1 1 3 2 3
|
|
select * from (select * from t1 natural join t2) as t12
|
|
natural join
|
|
(select * from t3 natural join t4) as t34;
|
|
b c a y
|
|
1 3 2 11
|
|
1 3 2 2
|
|
select * from (select * from t1 natural join t2) as t12
|
|
natural left join
|
|
(select * from t3 natural join t4) as t34;
|
|
b c a y
|
|
1 10 2 NULL
|
|
1 3 2 11
|
|
1 3 2 2
|
|
select * from (select * from t3 natural join t4) as t34
|
|
natural right join
|
|
(select * from t1 natural join t2) as t12;
|
|
b c a y
|
|
1 10 2 NULL
|
|
1 3 2 11
|
|
1 3 2 2
|
|
select * from v1a;
|
|
b c a
|
|
1 10 2
|
|
1 3 2
|
|
select * from v1b;
|
|
a b c
|
|
1 10 2
|
|
1 3 2
|
|
select * from v1c;
|
|
a b c
|
|
1 10 2
|
|
1 3 2
|
|
select * from v1d;
|
|
b a c
|
|
2 10 1
|
|
2 3 1
|
|
select * from v2a;
|
|
c b a
|
|
3 1 2
|
|
3 2 2
|
|
select * from v2b;
|
|
b a c
|
|
3 1 2
|
|
3 2 2
|
|
select * from v3a;
|
|
b c a
|
|
1 10 2
|
|
1 3 2
|
|
select * from v3b;
|
|
c b a
|
|
10 1 2
|
|
3 1 2
|
|
select * from v4;
|
|
c b a
|
|
3 1 2
|
|
select * from v1a natural join v2a;
|
|
b c a
|
|
1 3 2
|
|
select v2a.* from v1a natural join v2a;
|
|
c b a
|
|
3 1 2
|
|
select * from v1b join v2a on v1b.b = v2a.c;
|
|
a b c c b a
|
|
1 3 2 3 1 2
|
|
1 3 2 3 2 2
|
|
select * from v1c join v2a on v1c.b = v2a.c;
|
|
a b c c b a
|
|
1 3 2 3 1 2
|
|
1 3 2 3 2 2
|
|
select * from v1d join v2a on v1d.a = v2a.c;
|
|
b a c c b a
|
|
2 3 1 3 1 2
|
|
2 3 1 3 2 2
|
|
select * from v1a join (t3 natural join t4) on a = y;
|
|
b c a c b y
|
|
1 10 2 3 1 2
|
|
1 3 2 3 1 2
|
|
select * from t1 natural join (t3 cross join t4);
|
|
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
select * from (t3 cross join t4) natural join t1;
|
|
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
select * from t1 join (t2, t3) using (b);
|
|
ERROR 23000: Column 'b' in from clause is ambiguous
|
|
select * from ((t1 natural join t2), (t3 natural join t4)) natural join t6;
|
|
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
select * from ((t1 natural join t2), (t3 natural join t4)) natural join t6;
|
|
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
select * from t6 natural join ((t1 natural join t2), (t3 natural join t4));
|
|
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
select * from (t1 join t2 on t1.b=t2.b) natural join (t3 natural join t4);
|
|
ERROR 23000: Column 'b' in from clause is ambiguous
|
|
select * from (t3 natural join t4) natural join (t1 join t2 on t1.b=t2.b);
|
|
ERROR 23000: Column 'b' in from clause is ambiguous
|
|
select * from (t3 join (t4 natural join t5) on (b < z))
|
|
natural join
|
|
(t1 natural join t2);
|
|
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
select * from (t1 natural join t2) natural join (t3 join (t4 natural join t5) on (b < z));
|
|
ERROR 23000: Column 'c' in from clause is ambiguous
|
|
select t1.b from v1a;
|
|
ERROR 42S22: Unknown column 't1.b' in 'field list'
|
|
select * from v1a join v1b on t1.b = t2.b;
|
|
ERROR 42S22: Unknown column 't1.b' in 'on clause'
|
|
ANALYZE TABLE mysql.user;
|
|
Table Op Msg_type Msg_text
|
|
mysql.user analyze status OK
|
|
select
|
|
statistics.TABLE_NAME, statistics.COLUMN_NAME, statistics.TABLE_CATALOG, statistics.TABLE_SCHEMA, statistics.NON_UNIQUE, statistics.INDEX_SCHEMA, statistics.INDEX_NAME, statistics.SEQ_IN_INDEX, statistics.COLLATION, statistics.SUB_PART, statistics.PACKED, statistics.NULLABLE, statistics.INDEX_TYPE, statistics.COMMENT,
|
|
columns.TABLE_CATALOG, columns.TABLE_SCHEMA, columns.COLUMN_DEFAULT, columns.IS_NULLABLE, columns.DATA_TYPE, columns.CHARACTER_MAXIMUM_LENGTH, columns.CHARACTER_OCTET_LENGTH, columns.NUMERIC_PRECISION, columns.NUMERIC_SCALE, columns.CHARACTER_SET_NAME, columns.COLLATION_NAME, columns.COLUMN_TYPE, columns.COLUMN_KEY, columns.EXTRA, columns.PRIVILEGES, columns.COLUMN_COMMENT
|
|
from information_schema.statistics join information_schema.columns using(table_name,column_name) where table_name='user';
|
|
TABLE_NAME COLUMN_NAME TABLE_CATALOG TABLE_SCHEMA NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLLATION SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT TABLE_CATALOG TABLE_SCHEMA COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
|
|
user Host def mysql 0 mysql PRIMARY 1 A NULL NULL BTREE def mysql NO char 255 255 NULL NULL ascii ascii_general_ci char(255) PRI select,insert,update,references
|
|
user User def mysql 0 mysql PRIMARY 2 A NULL NULL BTREE def mysql NO char 32 96 NULL NULL utf8 utf8_bin char(32) PRI select,insert,update,references
|
|
drop table t1;
|
|
drop table t2;
|
|
drop table t3;
|
|
drop table t4;
|
|
drop table t5;
|
|
drop table t6;
|
|
drop view v1a;
|
|
drop view v1b;
|
|
drop view v1c;
|
|
drop view v1d;
|
|
drop view v2a;
|
|
drop view v2b;
|
|
drop view v3a;
|
|
drop view v3b;
|
|
drop view v4;
|
|
create table t1 (a1 int, a2 int);
|
|
create table t2 (a1 int, b int);
|
|
create table t3 (c1 int, c2 int);
|
|
create table t4 (c2 int);
|
|
insert into t1 values (1,1);
|
|
insert into t2 values (1,1);
|
|
insert into t3 values (1,1);
|
|
insert into t4 values (1);
|
|
select * from t1 join t2 using (a1) join t3 on b=c1 join t4 using (c2);
|
|
c2 a1 a2 b c1
|
|
1 1 1 1 1
|
|
select * from t3 join (t1 join t2 using (a1)) on b=c1 join t4 using (c2);
|
|
c2 c1 a1 a2 b
|
|
1 1 1 1 1
|
|
select a2 from t1 join t2 using (a1) join t3 on b=c1 join t4 using (c2);
|
|
a2
|
|
1
|
|
select a2 from t3 join (t1 join t2 using (a1)) on b=c1 join t4 using (c2);
|
|
a2
|
|
1
|
|
select a2 from ((t1 join t2 using (a1)) join t3 on b=c1) join t4 using (c2);
|
|
a2
|
|
1
|
|
select a2 from ((t1 natural join t2) join t3 on b=c1) natural join t4;
|
|
a2
|
|
1
|
|
drop table t1,t2,t3,t4;
|
|
create table t1 (c int, b int);
|
|
create table t2 (a int, b int);
|
|
create table t3 (b int, c int);
|
|
create table t4 (y int, c int);
|
|
create table t5 (y int, z int);
|
|
insert into t1 values (3,2);
|
|
insert into t2 values (1,2);
|
|
insert into t3 values (2,3);
|
|
insert into t4 values (1,3);
|
|
insert into t5 values (1,4);
|
|
prepare stmt1 from "select * from ((t3 natural join (t1 natural join t2))
|
|
natural join t4) natural join t5";
|
|
execute stmt1;
|
|
y c b a z
|
|
1 3 2 1 4
|
|
select * from ((t3 natural join (t1 natural join t2)) natural join t4)
|
|
natural join t5;
|
|
y c b a z
|
|
1 3 2 1 4
|
|
drop table t1, t2, t3, t4, t5;
|
|
CREATE TABLE t1 (ID INTEGER, Name VARCHAR(50));
|
|
CREATE TABLE t2 (Test_ID INTEGER);
|
|
CREATE VIEW v1 (Test_ID, Description) AS SELECT ID, Name FROM t1;
|
|
CREATE TABLE tv1 SELECT Description AS Name FROM v1 JOIN t2
|
|
USING (Test_ID);
|
|
DESCRIBE tv1;
|
|
Field Type Null Key Default Extra
|
|
Name varchar(50) YES NULL
|
|
CREATE TABLE tv2 SELECT Description AS Name FROM v1 JOIN t2
|
|
ON v1.Test_ID = t2.Test_ID;
|
|
DESCRIBE tv2;
|
|
Field Type Null Key Default Extra
|
|
Name varchar(50) YES NULL
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2,tv1,tv2;
|
|
create table t1 (a int, b int);
|
|
insert into t1 values
|
|
(NULL, 1),
|
|
(NULL, 2),
|
|
(NULL, 3),
|
|
(NULL, 4);
|
|
create table t2 (a int not null, primary key(a));
|
|
insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t3 (a int not null, primary key(a));
|
|
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
flush status;
|
|
select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
|
|
a b a a
|
|
explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=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 4 100.00 Using where
|
|
1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index
|
|
1 SIMPLE t3 NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a` from `test`.`t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t3`.`a` = `test`.`t1`.`a`))
|
|
We expect rnd_next=5, and read_key must be 0 because of short-cutting:
|
|
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 5
|
|
drop table t1, t2, t3;
|
|
create table t1 (a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2 (a int, b int, filler char(100), key(a), key(b));
|
|
create table t3 (a int, b int, filler char(100), key(a), key(b));
|
|
insert into t2
|
|
select @a:= A.a + 10*(B.a + 10*C.a), @a, 'filler' from t1 A, t1 B, t1 C;
|
|
Warnings:
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
insert into t3 select * from t2 where a < 800;
|
|
explain select * from t2,t3 where t2.a < 400 and t2.b=t3.b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL ALL a,b NULL NULL NULL 1000 39.50 Using where
|
|
1 SIMPLE t3 NULL ref b b 5 test.t2.b 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`filler` AS `filler`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`filler` AS `filler` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`a` < 400))
|
|
drop table t1, t2, t3;
|
|
create table t1 (a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2 (a int, b int, primary key(a));
|
|
insert into t2 select @v:=A.a+10*B.a, @v from t1 A, t1 B;
|
|
Warnings:
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
explain select * from t1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 10 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1`
|
|
show status like '%cost%';
|
|
Variable_name Value
|
|
Last_query_cost 1.503272
|
|
select 'The cost of accessing t1 (dont care if it changes' '^';
|
|
The cost of accessing t1 (dont care if it changes
|
|
The cost of accessing t1 (dont care if it changes^
|
|
select 'vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv' Z;
|
|
Z
|
|
vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv
|
|
explain select * from t1, t2 a, t2 b where a.a = t1.a and b.a=a.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 10 100.00 Using where
|
|
1 SIMPLE a NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where
|
|
1 SIMPLE b NULL eq_ref PRIMARY PRIMARY 4 test.a.b 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`a`.`a` AS `a`,`test`.`a`.`b` AS `b`,`test`.`b`.`a` AS `a`,`test`.`b`.`b` AS `b` from `test`.`t1` join `test`.`t2` `a` join `test`.`t2` `b` where ((`test`.`b`.`a` = `test`.`a`.`b`) and (`test`.`a`.`a` = `test`.`t1`.`a`))
|
|
show status like '%cost%';
|
|
Variable_name Value
|
|
Last_query_cost 8.503272
|
|
select '^^: The above should be ~= 8 + cost(select * from t1). Value less than 8 is an error' Z;
|
|
Z
|
|
^^: The above should be ~= 8 + cost(select * from t1). Value less than 8 is an error
|
|
drop table t1, t2;
|
|
CREATE TABLE t1 (a INT PRIMARY KEY, b INT);
|
|
CREATE TABLE t2 (c INT PRIMARY KEY, d INT);
|
|
INSERT INTO t1 VALUES(1,NULL),(2,NULL),(3,NULL),(4,NULL);
|
|
INSERT INTO t1 SELECT a + 4, b FROM t1;
|
|
INSERT INTO t1 SELECT a + 8, b FROM t1;
|
|
INSERT INTO t1 SELECT a + 16, b FROM t1;
|
|
INSERT INTO t1 SELECT a + 32, b FROM t1;
|
|
INSERT INTO t1 SELECT a + 64, b FROM t1;
|
|
INSERT INTO t2 SELECT a, b FROM t1;
|
|
EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index NULL PRIMARY 4 NULL 2 100.00 Using where
|
|
1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`b`) order by `test`.`t1`.`a` limit 2
|
|
EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 2 100.00 NULL
|
|
1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`a`) order by `test`.`t1`.`a` limit 2
|
|
SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2;
|
|
a b c d
|
|
SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2;
|
|
a b c d
|
|
1 NULL 1 NULL
|
|
2 NULL 2 NULL
|
|
EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY 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 128 100.00 Using where; Using filesort
|
|
1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`b`) order by `test`.`t1`.`a`
|
|
EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL PRIMARY NULL NULL NULL 128 100.00 Using filesort
|
|
1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`a`) order by `test`.`t1`.`a`
|
|
SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a;
|
|
a b c d
|
|
SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a;
|
|
a b c d
|
|
1 NULL 1 NULL
|
|
2 NULL 2 NULL
|
|
3 NULL 3 NULL
|
|
4 NULL 4 NULL
|
|
5 NULL 5 NULL
|
|
6 NULL 6 NULL
|
|
7 NULL 7 NULL
|
|
8 NULL 8 NULL
|
|
9 NULL 9 NULL
|
|
10 NULL 10 NULL
|
|
11 NULL 11 NULL
|
|
12 NULL 12 NULL
|
|
13 NULL 13 NULL
|
|
14 NULL 14 NULL
|
|
15 NULL 15 NULL
|
|
16 NULL 16 NULL
|
|
17 NULL 17 NULL
|
|
18 NULL 18 NULL
|
|
19 NULL 19 NULL
|
|
20 NULL 20 NULL
|
|
21 NULL 21 NULL
|
|
22 NULL 22 NULL
|
|
23 NULL 23 NULL
|
|
24 NULL 24 NULL
|
|
25 NULL 25 NULL
|
|
26 NULL 26 NULL
|
|
27 NULL 27 NULL
|
|
28 NULL 28 NULL
|
|
29 NULL 29 NULL
|
|
30 NULL 30 NULL
|
|
31 NULL 31 NULL
|
|
32 NULL 32 NULL
|
|
33 NULL 33 NULL
|
|
34 NULL 34 NULL
|
|
35 NULL 35 NULL
|
|
36 NULL 36 NULL
|
|
37 NULL 37 NULL
|
|
38 NULL 38 NULL
|
|
39 NULL 39 NULL
|
|
40 NULL 40 NULL
|
|
41 NULL 41 NULL
|
|
42 NULL 42 NULL
|
|
43 NULL 43 NULL
|
|
44 NULL 44 NULL
|
|
45 NULL 45 NULL
|
|
46 NULL 46 NULL
|
|
47 NULL 47 NULL
|
|
48 NULL 48 NULL
|
|
49 NULL 49 NULL
|
|
50 NULL 50 NULL
|
|
51 NULL 51 NULL
|
|
52 NULL 52 NULL
|
|
53 NULL 53 NULL
|
|
54 NULL 54 NULL
|
|
55 NULL 55 NULL
|
|
56 NULL 56 NULL
|
|
57 NULL 57 NULL
|
|
58 NULL 58 NULL
|
|
59 NULL 59 NULL
|
|
60 NULL 60 NULL
|
|
61 NULL 61 NULL
|
|
62 NULL 62 NULL
|
|
63 NULL 63 NULL
|
|
64 NULL 64 NULL
|
|
65 NULL 65 NULL
|
|
66 NULL 66 NULL
|
|
67 NULL 67 NULL
|
|
68 NULL 68 NULL
|
|
69 NULL 69 NULL
|
|
70 NULL 70 NULL
|
|
71 NULL 71 NULL
|
|
72 NULL 72 NULL
|
|
73 NULL 73 NULL
|
|
74 NULL 74 NULL
|
|
75 NULL 75 NULL
|
|
76 NULL 76 NULL
|
|
77 NULL 77 NULL
|
|
78 NULL 78 NULL
|
|
79 NULL 79 NULL
|
|
80 NULL 80 NULL
|
|
81 NULL 81 NULL
|
|
82 NULL 82 NULL
|
|
83 NULL 83 NULL
|
|
84 NULL 84 NULL
|
|
85 NULL 85 NULL
|
|
86 NULL 86 NULL
|
|
87 NULL 87 NULL
|
|
88 NULL 88 NULL
|
|
89 NULL 89 NULL
|
|
90 NULL 90 NULL
|
|
91 NULL 91 NULL
|
|
92 NULL 92 NULL
|
|
93 NULL 93 NULL
|
|
94 NULL 94 NULL
|
|
95 NULL 95 NULL
|
|
96 NULL 96 NULL
|
|
97 NULL 97 NULL
|
|
98 NULL 98 NULL
|
|
99 NULL 99 NULL
|
|
100 NULL 100 NULL
|
|
101 NULL 101 NULL
|
|
102 NULL 102 NULL
|
|
103 NULL 103 NULL
|
|
104 NULL 104 NULL
|
|
105 NULL 105 NULL
|
|
106 NULL 106 NULL
|
|
107 NULL 107 NULL
|
|
108 NULL 108 NULL
|
|
109 NULL 109 NULL
|
|
110 NULL 110 NULL
|
|
111 NULL 111 NULL
|
|
112 NULL 112 NULL
|
|
113 NULL 113 NULL
|
|
114 NULL 114 NULL
|
|
115 NULL 115 NULL
|
|
116 NULL 116 NULL
|
|
117 NULL 117 NULL
|
|
118 NULL 118 NULL
|
|
119 NULL 119 NULL
|
|
120 NULL 120 NULL
|
|
121 NULL 121 NULL
|
|
122 NULL 122 NULL
|
|
123 NULL 123 NULL
|
|
124 NULL 124 NULL
|
|
125 NULL 125 NULL
|
|
126 NULL 126 NULL
|
|
127 NULL 127 NULL
|
|
128 NULL 128 NULL
|
|
DROP TABLE IF EXISTS t1,t2;
|
|
#
|
|
# Bug #42116: Mysql crash on specific query
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
CREATE TABLE t2 (a INT);
|
|
CREATE TABLE t3 (a INT, INDEX (a));
|
|
CREATE TABLE t4 (a INT);
|
|
CREATE TABLE t5 (a INT);
|
|
CREATE TABLE t6 (a INT);
|
|
INSERT INTO t1 VALUES (1), (1), (1);
|
|
INSERT INTO t2 VALUES
|
|
(2), (2), (2), (2), (2), (2), (2), (2), (2), (2);
|
|
INSERT INTO t3 VALUES
|
|
(3), (3), (3), (3), (3), (3), (3), (3), (3), (3);
|
|
EXPLAIN
|
|
SELECT *
|
|
FROM
|
|
t1 JOIN t2 ON t1.a = t2.a
|
|
LEFT JOIN
|
|
(
|
|
(
|
|
t3 LEFT JOIN t4 ON t3.a = t4.a
|
|
)
|
|
LEFT JOIN
|
|
(
|
|
t5 LEFT JOIN t6 ON t5.a = t6.a
|
|
)
|
|
ON t4.a = t5.a
|
|
)
|
|
ON t1.a = t3.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 3 100.00 NULL
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 10 10.00 Using where; Using join buffer (Block Nested Loop)
|
|
1 SIMPLE t3 NULL ref a a 5 test.t1.a 2 100.00 Using where; Using index
|
|
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 0 0.00 Using where
|
|
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 0 0.00 Using where
|
|
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 0 0.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t4`.`a` AS `a`,`test`.`t5`.`a` AS `a`,`test`.`t6`.`a` AS `a` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` left join `test`.`t4` on((`test`.`t4`.`a` = `test`.`t1`.`a`)) left join (`test`.`t5` left join `test`.`t6` on((`test`.`t6`.`a` = `test`.`t4`.`a`))) on((`test`.`t5`.`a` = `test`.`t4`.`a`))) on(((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`a`))) where (`test`.`t2`.`a` = `test`.`t1`.`a`)
|
|
SELECT *
|
|
FROM
|
|
t1 JOIN t2 ON t1.a = t2.a
|
|
LEFT JOIN
|
|
(
|
|
(
|
|
t3 LEFT JOIN t4 ON t3.a = t4.a
|
|
)
|
|
LEFT JOIN
|
|
(
|
|
t5 LEFT JOIN t6 ON t5.a = t6.a
|
|
)
|
|
ON t4.a = t5.a
|
|
)
|
|
ON t1.a = t3.a;
|
|
a a a a a a
|
|
DROP TABLE t1,t2,t3,t4,t5,t6;
|
|
#
|
|
# Bug#48483: crash in get_best_combination()
|
|
#
|
|
CREATE TABLE t1(f1 INT);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE VIEW v1 AS SELECT 1 FROM t1 LEFT JOIN t1 AS t2 on 1=1;
|
|
EXPLAIN
|
|
SELECT 1 FROM v1 right join v1 AS v2 ON RAND();
|
|
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 2 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join `test`.`t1` `t2` on(true) left join (`test`.`t1` left join `test`.`t1` `t2` on(true)) on((0 <> rand())) where true
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug#52177 crash with explain, row comparison, join, text field
|
|
#
|
|
CREATE TABLE t1 (a TINYINT, b TEXT, KEY (a));
|
|
INSERT INTO t1 VALUES (0,''),(0,'');
|
|
FLUSH TABLES;
|
|
EXPLAIN SELECT 1 FROM t1 LEFT JOIN t1 a ON 1
|
|
WHERE ROW(t1.a, 1111.11) = ROW(1111.11, 1111.11) AND
|
|
ROW(t1.b, 1111.11) <=> ROW('','');
|
|
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 Impossible WHERE
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join `test`.`t1` `a` on(true) where false
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug #50335: Assertion `!(order->used & map)' in eq_ref_table
|
|
#
|
|
CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL, PRIMARY KEY (a,b));
|
|
INSERT INTO t1 VALUES (0,0), (1,1);
|
|
SELECT * FROM t1 STRAIGHT_JOIN t1 t2 ON t1.a=t2.a AND t1.a=t2.b ORDER BY t2.a, t1.a;
|
|
a b a b
|
|
0 0 0 0
|
|
1 1 1 1
|
|
DROP TABLE t1;
|
|
End of 5.0 tests.
|
|
CREATE TABLE t1 (f1 int);
|
|
CREATE TABLE t2 (f1 int);
|
|
INSERT INTO t2 VALUES (1);
|
|
CREATE VIEW v1 AS SELECT * FROM t2;
|
|
PREPARE stmt FROM 'UPDATE t2 AS A NATURAL JOIN v1 B SET B.f1 = 1';
|
|
EXECUTE stmt;
|
|
EXECUTE stmt;
|
|
DEALLOCATE PREPARE stmt;
|
|
DROP VIEW v1;
|
|
DROP TABLE t1, t2;
|
|
CREATE TABLE t1(a CHAR(9),b INT,KEY(b),KEY(a)) ENGINE=MYISAM;
|
|
CREATE TABLE t2(a CHAR(9),b INT,KEY(b),KEY(a)) ENGINE=MYISAM;
|
|
INSERT INTO t1 VALUES ('1',null),(null,null);
|
|
INSERT INTO t2 VALUES ('1',null),(null,null);
|
|
CREATE TABLE mm1(a CHAR(9),b INT,KEY(b),KEY(a))
|
|
ENGINE=MERGE UNION=(t1,t2);
|
|
SELECT t1.a FROM mm1,t1;
|
|
a
|
|
1
|
|
1
|
|
1
|
|
1
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
DROP TABLE t1, t2, mm1;
|
|
#
|
|
# Bug #54468: crash after item's print() function when ordering/grouping
|
|
# by subquery
|
|
#
|
|
CREATE TABLE t1(a INT, b INT);
|
|
INSERT INTO t1 VALUES (), ();
|
|
SELECT 1 FROM t1
|
|
GROUP BY
|
|
GREATEST(t1.a,
|
|
(SELECT 1 FROM
|
|
(SELECT t1.b FROM t1,t1 t2
|
|
ORDER BY t1.a, t1.a LIMIT 1) AS d)
|
|
);
|
|
1
|
|
1
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug #53544: Server hangs during JOIN query in stored procedure called
|
|
# twice in a row
|
|
#
|
|
CREATE TABLE t1(c INT);
|
|
INSERT INTO t1 VALUES (1), (2);
|
|
PREPARE stmt FROM "SELECT t2.c AS f1 FROM t1 LEFT JOIN
|
|
t1 t2 ON t1.c=t2.c RIGHT JOIN
|
|
t1 t3 ON t1.c=t3.c
|
|
GROUP BY f1;";
|
|
EXECUTE stmt;
|
|
f1
|
|
1
|
|
2
|
|
EXECUTE stmt;
|
|
f1
|
|
1
|
|
2
|
|
DEALLOCATE PREPARE stmt;
|
|
DROP TABLE t1;
|
|
End of 5.1 tests
|
|
#
|
|
# Bug #59696 Optimizer fails to move WHERE condition on JOIN column
|
|
# when joining with a view
|
|
#
|
|
CREATE TABLE t1 (
|
|
c1 INTEGER NOT NULL
|
|
);
|
|
INSERT INTO t1 VALUES (1),(2),(3);
|
|
CREATE TABLE t2 (
|
|
pk INTEGER NOT NULL,
|
|
c1 INTEGER NOT NULL,
|
|
PRIMARY KEY (pk)
|
|
);
|
|
INSERT INTO t2 VALUES (1,4),(3,5),(2,6);
|
|
EXPLAIN SELECT t2.pk, t2.c1 FROM t2, t1
|
|
WHERE t2.pk = t1.c1 AND t2.pk >= 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 3 100.00 Using where
|
|
1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.c1 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`pk` AS `pk`,`test`.`t2`.`c1` AS `c1` from `test`.`t2` join `test`.`t1` where ((`test`.`t2`.`pk` = `test`.`t1`.`c1`) and (`test`.`t1`.`c1` >= 2))
|
|
SELECT t2.pk, t2.c1 FROM t2, t1
|
|
WHERE t2.pk = t1.c1 AND t2.pk >= 2;
|
|
pk c1
|
|
2 6
|
|
3 5
|
|
CREATE VIEW v_t2 AS SELECT * FROM t2;
|
|
EXPLAIN SELECT v_t2.pk, v_t2.c1 FROM v_t2, t1
|
|
WHERE v_t2.pk = t1.c1 AND v_t2.pk >= 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 3 100.00 NULL
|
|
1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.c1 1 100.00 Using index condition
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`pk` AS `pk`,`test`.`t2`.`c1` AS `c1` from `test`.`t2` join `test`.`t1` where ((`test`.`t2`.`pk` = `test`.`t1`.`c1`) and (`test`.`t2`.`pk` >= 2))
|
|
SELECT v_t2.pk, v_t2.c1 FROM v_t2, t1
|
|
WHERE v_t2.pk = t1.c1 AND v_t2.pk >= 2;
|
|
pk c1
|
|
2 6
|
|
3 5
|
|
DROP VIEW v_t2;
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# Bug 13102033 - CRASH IN COPY_FUNCS IN SQL_SELECT.CC ON JOIN +
|
|
# GROUP BY + ORDER BY
|
|
#
|
|
CREATE TABLE t1 (
|
|
pk INTEGER NOT NULL,
|
|
i1 INTEGER NOT NULL,
|
|
i2 INTEGER NOT NULL,
|
|
PRIMARY KEY (pk)
|
|
);
|
|
INSERT INTO t1 VALUES (7,8,1), (8,2,2);
|
|
CREATE VIEW v1 AS SELECT * FROM t1;
|
|
EXPLAIN SELECT t1.pk
|
|
FROM v1, t1
|
|
WHERE v1.i2 = 211
|
|
AND v1.i2 > 7
|
|
OR t1.i1 < 3
|
|
GROUP BY t1.pk
|
|
ORDER BY v1.i2;
|
|
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 t1 NULL ALL PRIMARY NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` join `test`.`t1` where (((`test`.`t1`.`i2` = 211) and (`test`.`t1`.`i2` > 7)) or (`test`.`t1`.`i1` < 3)) group by `test`.`t1`.`pk` order by `test`.`t1`.`i2`
|
|
SELECT t1.pk
|
|
FROM v1, t1
|
|
WHERE v1.i2 = 211
|
|
AND v1.i2 > 7
|
|
OR t1.i1 < 3
|
|
GROUP BY t1.pk
|
|
ORDER BY v1.i2;
|
|
pk
|
|
8
|
|
EXPLAIN SELECT t1.pk
|
|
FROM v1, t1
|
|
WHERE (v1.i2 = 211 AND v1.i2 > 7)
|
|
OR (t1.i1 < 3 AND v1.i2 < 10);
|
|
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 62.50 Using where
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` join `test`.`t1` where (((`test`.`t1`.`i2` = 211) and (`test`.`t1`.`i2` > 7)) or ((`test`.`t1`.`i1` < 3) and (`test`.`t1`.`i2` < 10)))
|
|
SELECT t1.pk
|
|
FROM v1, t1
|
|
WHERE (v1.i2 = 211 AND v1.i2 > 7)
|
|
OR (t1.i1 < 3 AND v1.i2 < 10);
|
|
pk
|
|
8
|
|
8
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
#
|
|
# BUG#11752239 - 43368: STRAIGHT_JOIN DOESN'T WORK FOR NESTED JOINS
|
|
#
|
|
create table t1(c1 int primary key, c2 char(10)) engine=myisam;
|
|
create table t2(c1 int primary key, c2 char(10), ref_t1 int) engine=myisam;
|
|
create table t3(c1 int primary key, c2 char(10), ref_t1 int) engine=myisam;
|
|
create table t4(c1 int primary key, c2 char(10), ref_t1 int) engine=myisam;
|
|
insert into t1 values(1,'a');
|
|
insert into t2 values(1,'a', 1);
|
|
insert into t3 values(1,'a', 1);
|
|
insert into t3 values(2,'b',2);
|
|
insert into t4 values(1,'a', 1);
|
|
insert into t4 values(2,'a', 2);
|
|
insert into t4 values(3,'a', 3);
|
|
insert into t4 values(4,'a', 4);
|
|
insert into t1 values(2,'b');
|
|
insert into t1 values(3,'c');
|
|
EXPLAIN SELECT * FROM t4 JOIN (t1 join t3 on t3.ref_t1 =
|
|
t1.c1 join t2 on t2.ref_t1 = t1.c1) on t4.ref_t1 = t1.c1;
|
|
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 const PRIMARY PRIMARY 4 const 1 100.00 NULL
|
|
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
|
|
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 4 25.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t4`.`c1` AS `c1`,`test`.`t4`.`c2` AS `c2`,`test`.`t4`.`ref_t1` AS `ref_t1`,'1' AS `c1`,'a' AS `c2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2`,`test`.`t3`.`ref_t1` AS `ref_t1`,'1' AS `c1`,'a' AS `c2`,'1' AS `ref_t1` from `test`.`t4` join `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`ref_t1` = '1') and (`test`.`t4`.`ref_t1` = '1'))
|
|
EXPLAIN SELECT STRAIGHT_JOIN * FROM t4 JOIN (t1 join t3 on t3.ref_t1 =
|
|
t1.c1 join t2 on t2.ref_t1 = t1.c1) on t4.ref_t1 = t1.c1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
1 SIMPLE t1 NULL eq_ref PRIMARY PRIMARY 4 test.t4.ref_t1 1 100.00 NULL
|
|
1 SIMPLE t3 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 1 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select straight_join `test`.`t4`.`c1` AS `c1`,`test`.`t4`.`c2` AS `c2`,`test`.`t4`.`ref_t1` AS `ref_t1`,`test`.`t1`.`c1` AS `c1`,`test`.`t1`.`c2` AS `c2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2`,`test`.`t3`.`ref_t1` AS `ref_t1`,`test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2`,`test`.`t2`.`ref_t1` AS `ref_t1` from `test`.`t4` join `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`c1` = `test`.`t4`.`ref_t1`) and (`test`.`t3`.`ref_t1` = `test`.`t4`.`ref_t1`) and (`test`.`t2`.`ref_t1` = `test`.`t4`.`ref_t1`))
|
|
EXPLAIN SELECT * FROM t4 STRAIGHT_JOIN (t1 join t3 on t3.ref_t1 =
|
|
t1.c1 join t2 on t2.ref_t1 = t1.c1) on t4.ref_t1 = t1.c1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 4 100.00 Using where
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop)
|
|
1 SIMPLE t1 NULL eq_ref PRIMARY PRIMARY 4 test.t4.ref_t1 1 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t4`.`c1` AS `c1`,`test`.`t4`.`c2` AS `c2`,`test`.`t4`.`ref_t1` AS `ref_t1`,`test`.`t1`.`c1` AS `c1`,`test`.`t1`.`c2` AS `c2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2`,`test`.`t3`.`ref_t1` AS `ref_t1`,`test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2`,`test`.`t2`.`ref_t1` AS `ref_t1` from `test`.`t4` join `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t2`.`ref_t1` = `test`.`t4`.`ref_t1`) and (`test`.`t3`.`ref_t1` = `test`.`t4`.`ref_t1`) and (`test`.`t1`.`c1` = `test`.`t4`.`ref_t1`))
|
|
drop table t1,t2,t3,t4;
|
|
# Bug#20455184: Assertion failed: join_cond in optimizer.cc
|
|
CREATE TABLE t1(a INTEGER) engine=innodb;
|
|
explain SELECT 1
|
|
FROM (SELECT 1 FROM t1 WHERE a) AS q
|
|
NATURAL LEFT JOIN t1
|
|
NATURAL LEFT JOIN t1 AS t2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join `test`.`t1` on(true) left join `test`.`t1` `t2` on((`test`.`t2`.`a` = `test`.`t1`.`a`)) where (0 <> `test`.`t1`.`a`)
|
|
SELECT 1
|
|
FROM (SELECT 1 FROM t1 WHERE a) AS q
|
|
NATURAL LEFT JOIN t1
|
|
NATURAL LEFT JOIN t1 AS t2;
|
|
1
|
|
explain SELECT 1
|
|
FROM t1
|
|
NATURAL RIGHT JOIN t1 AS t2
|
|
NATURAL RIGHT JOIN (SELECT 1 FROM t1 WHERE a) AS q;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join (`test`.`t1` `t2` left join `test`.`t1` on((`test`.`t1`.`a` = `test`.`t2`.`a`))) on(true) where (0 <> `test`.`t1`.`a`)
|
|
SELECT 1
|
|
FROM t1
|
|
NATURAL RIGHT JOIN t1 AS t2
|
|
NATURAL RIGHT JOIN (SELECT 1 FROM t1 WHERE a) AS q;
|
|
1
|
|
DROP TABLE t1;
|
|
# Bug#21045724: Assertion '!table || !table->read_set ...
|
|
CREATE TABLE t1
|
|
(pk INTEGER,
|
|
dummy VARCHAR(64),
|
|
col_check TINYINT,
|
|
PRIMARY KEY(pk)
|
|
) engine=innodb;
|
|
INSERT INTO t1 VALUES (13, '13', 13);
|
|
CREATE VIEW v1 AS
|
|
SELECT *
|
|
FROM t1
|
|
WHERE pk BETWEEN 13 AND 14;
|
|
PREPARE st1 FROM "
|
|
UPDATE v1 AS a NATURAL JOIN v1 AS b
|
|
SET a.dummy = '', b.col_check = NULL ";
|
|
EXECUTE st1;
|
|
EXECUTE st1;
|
|
DEALLOCATE PREPARE st1;
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
# Bug#25424289: Assert '!table->has_null_row()' failed in join_read_key
|
|
CREATE TABLE t1
|
|
(pk INT,
|
|
col_int_key INT DEFAULT NULL,
|
|
col_varchar_10_latin1_key VARCHAR(10) DEFAULT NULL,
|
|
col_varchar_255_utf8 VARCHAR(255) CHARACTER SET utf8 DEFAULT NULL,
|
|
col_int INT DEFAULT NULL,
|
|
col_datetime_key datetime DEFAULT NULL,
|
|
col_varchar_255_latin1_key VARCHAR(255) DEFAULT NULL,
|
|
col_date_key date DEFAULT NULL,
|
|
col_datetime datetime DEFAULT NULL,
|
|
PRIMARY KEY (pk),
|
|
KEY col_date_key (col_date_key)
|
|
) charset latin1 ENGINE=MyISAM;
|
|
Warnings:
|
|
Warning 3719 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
|
|
INSERT INTO t1 VALUES
|
|
(8,9,'h','FDUMQ',-1356726272,'2007-09-02 05:48:23','she','2002-04-02','2002-12-20 17:54:07');
|
|
CREATE TABLE t2
|
|
(pk INT,
|
|
col_int INT DEFAULT NULL,
|
|
col_int_key INT DEFAULT NULL,
|
|
PRIMARY KEY (pk)
|
|
) charset latin1 ENGINE=MyISAM;
|
|
CREATE TABLE t3
|
|
(col_int INT DEFAULT NULL,
|
|
col_int_key INT DEFAULT NULL,
|
|
pk INT,
|
|
PRIMARY KEY (pk),
|
|
KEY test_idx (col_int_key,pk,col_int)
|
|
) charset latin1 ENGINE=InnoDB;
|
|
INSERT INTO t3 VALUES
|
|
(NULL,9, 41), (NULL,-1596719104, 48), (-1068105728,9, 49);
|
|
CREATE TABLE t4
|
|
(col_varchar_255_latin1_key VARCHAR(255) DEFAULT NULL,
|
|
pk INT,
|
|
PRIMARY KEY (pk)
|
|
) charset latin1 ENGINE=MyISAM;
|
|
INSERT INTO t4 VALUES ('RUXDY',8);
|
|
ANALYZE TABLE t1, t2, t3, t4;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Table is already up to date
|
|
test.t3 analyze status OK
|
|
test.t4 analyze status OK
|
|
explain SELECT alias1.pk AS field5
|
|
FROM t3 AS alias1
|
|
LEFT JOIN t4 AS alias2
|
|
LEFT JOIN t4 AS alias3
|
|
LEFT JOIN t1 AS alias4
|
|
LEFT JOIN t2 AS alias5
|
|
ON alias4.pk = alias5.col_int_key
|
|
ON alias3.pk = alias5.col_int
|
|
ON alias2.col_varchar_255_latin1_key = alias4.col_varchar_10_latin1_key
|
|
RIGHT JOIN t1 AS alias6
|
|
ON alias4.pk = alias6.pk
|
|
RIGHT JOIN t4 AS alias7
|
|
ON alias6.pk = alias7.pk
|
|
ON alias1.col_int_key = alias6.col_int_key
|
|
WHERE alias1.col_int > 5 OR
|
|
alias5.col_int > 5;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE alias1 NULL index NULL test_idx 14 NULL 3 100.00 Using index
|
|
1 SIMPLE alias7 NULL index PRIMARY PRIMARY 4 NULL 1 100.00 Using index
|
|
1 SIMPLE alias6 NULL eq_ref PRIMARY PRIMARY 4 test.alias7.pk 1 100.00 Using where
|
|
1 SIMPLE alias4 NULL eq_ref PRIMARY PRIMARY 4 test.alias6.pk 1 100.00 Using where
|
|
1 SIMPLE alias5 NULL ALL NULL NULL NULL NULL 0 0.00 Using where
|
|
1 SIMPLE alias2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where
|
|
1 SIMPLE alias3 NULL eq_ref PRIMARY PRIMARY 4 test.alias5.col_int 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`alias1`.`pk` AS `field5` from `test`.`t3` `alias1` left join (`test`.`t4` `alias7` join `test`.`t1` `alias6` left join (`test`.`t4` `alias2` join `test`.`t4` `alias3` join `test`.`t1` `alias4` join `test`.`t2` `alias5`) on(((`test`.`alias3`.`pk` = `test`.`alias5`.`col_int`) and (`test`.`alias4`.`pk` = `test`.`alias7`.`pk`) and (`test`.`alias5`.`col_int_key` = `test`.`alias7`.`pk`) and (`test`.`alias2`.`col_varchar_255_latin1_key` = `test`.`alias4`.`col_varchar_10_latin1_key`)))) on(((`test`.`alias6`.`pk` = `test`.`alias7`.`pk`) and (`test`.`alias6`.`col_int_key` = `test`.`alias1`.`col_int_key`))) where ((`test`.`alias1`.`col_int` > 5) or (`test`.`alias5`.`col_int` > 5))
|
|
SELECT alias1.pk AS field5
|
|
FROM t3 AS alias1
|
|
LEFT JOIN t4 AS alias2
|
|
LEFT JOIN t4 AS alias3
|
|
LEFT JOIN t1 AS alias4
|
|
LEFT JOIN t2 AS alias5
|
|
ON alias4.pk = alias5.col_int_key
|
|
ON alias3.pk = alias5.col_int
|
|
ON alias2.col_varchar_255_latin1_key = alias4.col_varchar_10_latin1_key
|
|
RIGHT JOIN t1 AS alias6
|
|
ON alias4.pk = alias6.pk
|
|
RIGHT JOIN t4 AS alias7
|
|
ON alias6.pk = alias7.pk
|
|
ON alias1.col_int_key = alias6.col_int_key
|
|
WHERE alias1.col_int > 5 OR
|
|
alias5.col_int > 5;
|
|
field5
|
|
DROP TABLE t1, t2, t3, t4;
|
|
# Bug#28727717: Duplicated 'is not null' predicates
|
|
create table parent(a int primary key, b int, c int, d int) engine=innodb;
|
|
create table eq_child(a int, b int, c int, d int, primary key(a,b)) engine=innodb;
|
|
insert into parent values (1,1,1,1);
|
|
insert into eq_child select * from parent;
|
|
explain format=json select straight_join count(*) from parent
|
|
join eq_child as c1 on c1.a = parent.b and c1.b = parent.b
|
|
join eq_child as c2 on c2.a = parent.b and c2.b = parent.b
|
|
join eq_child as c3 on c3.a = parent.b and c3.b = parent.b
|
|
join eq_child as c4 on c4.a = parent.b and c4.b = parent.b
|
|
;
|
|
EXPLAIN
|
|
{
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"cost_info": {
|
|
"query_cost": "1.75"
|
|
},
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "parent",
|
|
"access_type": "ALL",
|
|
"rows_examined_per_scan": 1,
|
|
"rows_produced_per_join": 1,
|
|
"filtered": "100.00",
|
|
"cost_info": {
|
|
"read_cost": "0.25",
|
|
"eval_cost": "0.10",
|
|
"prefix_cost": "0.35",
|
|
"data_read_per_join": "24"
|
|
},
|
|
"used_columns": [
|
|
"b"
|
|
],
|
|
"attached_condition": "(`test`.`parent`.`b` is not null)"
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "c1",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": [
|
|
"PRIMARY"
|
|
],
|
|
"key": "PRIMARY",
|
|
"used_key_parts": [
|
|
"a",
|
|
"b"
|
|
],
|
|
"key_length": "8",
|
|
"ref": [
|
|
"test.parent.b",
|
|
"test.parent.b"
|
|
],
|
|
"rows_examined_per_scan": 1,
|
|
"rows_produced_per_join": 1,
|
|
"filtered": "100.00",
|
|
"using_index": true,
|
|
"cost_info": {
|
|
"read_cost": "0.25",
|
|
"eval_cost": "0.10",
|
|
"prefix_cost": "0.70",
|
|
"data_read_per_join": "24"
|
|
},
|
|
"used_columns": [
|
|
"a",
|
|
"b"
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "c2",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": [
|
|
"PRIMARY"
|
|
],
|
|
"key": "PRIMARY",
|
|
"used_key_parts": [
|
|
"a",
|
|
"b"
|
|
],
|
|
"key_length": "8",
|
|
"ref": [
|
|
"test.parent.b",
|
|
"test.parent.b"
|
|
],
|
|
"rows_examined_per_scan": 1,
|
|
"rows_produced_per_join": 1,
|
|
"filtered": "100.00",
|
|
"using_index": true,
|
|
"cost_info": {
|
|
"read_cost": "0.25",
|
|
"eval_cost": "0.10",
|
|
"prefix_cost": "1.05",
|
|
"data_read_per_join": "24"
|
|
},
|
|
"used_columns": [
|
|
"a",
|
|
"b"
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "c3",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": [
|
|
"PRIMARY"
|
|
],
|
|
"key": "PRIMARY",
|
|
"used_key_parts": [
|
|
"a",
|
|
"b"
|
|
],
|
|
"key_length": "8",
|
|
"ref": [
|
|
"test.parent.b",
|
|
"test.parent.b"
|
|
],
|
|
"rows_examined_per_scan": 1,
|
|
"rows_produced_per_join": 1,
|
|
"filtered": "100.00",
|
|
"using_index": true,
|
|
"cost_info": {
|
|
"read_cost": "0.25",
|
|
"eval_cost": "0.10",
|
|
"prefix_cost": "1.40",
|
|
"data_read_per_join": "24"
|
|
},
|
|
"used_columns": [
|
|
"a",
|
|
"b"
|
|
]
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "c4",
|
|
"access_type": "eq_ref",
|
|
"possible_keys": [
|
|
"PRIMARY"
|
|
],
|
|
"key": "PRIMARY",
|
|
"used_key_parts": [
|
|
"a",
|
|
"b"
|
|
],
|
|
"key_length": "8",
|
|
"ref": [
|
|
"test.parent.b",
|
|
"test.parent.b"
|
|
],
|
|
"rows_examined_per_scan": 1,
|
|
"rows_produced_per_join": 1,
|
|
"filtered": "100.00",
|
|
"using_index": true,
|
|
"cost_info": {
|
|
"read_cost": "0.25",
|
|
"eval_cost": "0.10",
|
|
"prefix_cost": "1.75",
|
|
"data_read_per_join": "24"
|
|
},
|
|
"used_columns": [
|
|
"a",
|
|
"b"
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select straight_join count(0) AS `count(*)` from `test`.`parent` join `test`.`eq_child` `c1` join `test`.`eq_child` `c2` join `test`.`eq_child` `c3` join `test`.`eq_child` `c4` where ((`test`.`c1`.`a` = `test`.`parent`.`b`) and (`test`.`c1`.`b` = `test`.`parent`.`b`) and (`test`.`c2`.`a` = `test`.`parent`.`b`) and (`test`.`c2`.`b` = `test`.`parent`.`b`) and (`test`.`c3`.`a` = `test`.`parent`.`b`) and (`test`.`c3`.`b` = `test`.`parent`.`b`) and (`test`.`c4`.`a` = `test`.`parent`.`b`) and (`test`.`c4`.`b` = `test`.`parent`.`b`))
|
|
drop table parent, eq_child;
|
|
#
|
|
# Bug #29954680: BACKWARDS REF SCAN DOES NOT PERFORM LATE NULLS FILTERING
|
|
#
|
|
CREATE TABLE t (i INTEGER PRIMARY KEY AUTO_INCREMENT, j INTEGER, KEY(j)) ENGINE=InnoDB;
|
|
INSERT INTO t VALUES (NULL, NULL);
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
INSERT INTO t SELECT NULL, NULL FROM t;
|
|
ANALYZE TABLE t;
|
|
Table Op Msg_type Msg_text
|
|
test.t analyze status OK
|
|
EXPLAIN FORMAT=tree SELECT t1.i AS a, (SELECT t2.i FROM t t2 WHERE t1.j = t2.j ORDER BY j DESC, i DESC LIMIT 1) AS b FROM t t1;
|
|
EXPLAIN
|
|
-> Index scan on t1 using j (cost=411.60 rows=4096)
|
|
-> Select #2 (subquery in projection; dependent)
|
|
-> Limit: 1 row(s)
|
|
-> Index lookup on t2 using j (j=t1.j; iterate backwards) (cost=410.97 rows=4096)
|
|
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t1.j' of SELECT #2 was resolved in SELECT #1
|
|
FLUSH STATUS;
|
|
SELECT t1.i AS a, (SELECT t2.i FROM t t2 WHERE t1.j = t2.j ORDER BY j DESC, i DESC LIMIT 1) AS b FROM t t1;
|
|
SHOW STATUS LIKE 'Handler_read_key';
|
|
Variable_name Value
|
|
Handler_read_key 1
|
|
DROP TABLE t;
|
|
|