Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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None
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None
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None
Description
Create and populate tables t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16
with the following commands:
CREATE TABLE t1 (
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a1 int NOT NULL, a2 int NOT NULL, a3 int DEFAULT NULL, a4 tinyint NOT NULL,
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a5 int NOT NULL, a6 tinyint NOT NULL, a7 tinyint(4) DEFAULT NULL,
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a8 smallint(6) DEFAULT NULL, a9 smallint(6) DEFAULT NULL, a10 tinyint NOT NULL,
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PRIMARY KEY (a1), KEY a2 (a2), KEY a3 (a3), KEY a4 (a4), KEY a6 (a6),
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KEY a5 (a5), KEY a7 (a7), KEY a8 (a8), KEY a9 (a9)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t1 VALUES
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(3360,5684,2219,1,316832,1,0,NULL,NULL,NULL),
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(3362,2754,597,2,316844,1,0,NULL,NULL,NULL),
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(3363,369,NULL,1,317295,1,0,NULL,NULL,NULL);
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CREATE TABLE t2 (
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b1 int NOT NULL, b2 int NOT NULL, PRIMARY KEY (b1,b2), KEY b2 (b2)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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CREATE TABLE t3 (
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c1 int NOT NULL, PRIMARY KEY (c1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t3 VALUES
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(1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12),
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(1000),(1001),(1002),(1003),(9999);
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CREATE TABLE t4 (
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d1 int NOT NULL, PRIMARY KEY (d1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t4 VALUES (5674),(5676),(5680),(5684),(5685);
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CREATE TABLE t5 (
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e1 int NOT NULL, e2 varchar(64) NOT NULL, PRIMARY KEY (e1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t5 VALUES
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(5684,'51a5de7a9f56314e082094d78f58be082c3cf0c1'),
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(5685,'754dc8292cb9f5eb9ade126fe7e961c62412a349'),
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(5686,'75eeb33f1c819bac21f6d023b4c5b24185eeda5c');
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CREATE TABLE t6 (
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f1 int NOT NULL, PRIMARY KEY (f1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t6 VALUES (5542),(5620),(5686);
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CREATE TABLE t7 (
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g1 tinyint NOT NULL DEFAULT '0', g2 varchar(20) NOT NULL, PRIMARY KEY (g1)
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) ENGINE=InnoDB DEFAULT CHARSET=latin1;
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INSERT INTO t7 VALUES
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(1,'60feec2b20ed19f55ad0'),(3,'9ddb18bff7fcbd1e3133'),
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(5,'a05599df9222bb160d11'),(7,'e31bae372f7d01df0589'),
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(9,'8f8372dd7fc8eb46c8a3'),(11,'f8d0e28529e990a09309');
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CREATE TABLE t8 (
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h1 tinyint NOT NULL, h2 varchar(128) DEFAULT NULL, PRIMARY KEY (h1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t8 VALUES (1,'b'),(2,'c'),(3,'d'),(4,'e');
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CREATE TABLE t9 (
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i1 tinyint NOT NULL, i2 varchar(7) NOT NULL, i3 varchar(128) NOT NULL,
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PRIMARY KEY (i1,i2), KEY i2 (i2), KEY i3 (i3)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t9 VALUES
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(2,'a','07630d223c7e5f7b1feb19b3caafb0833fd028eb'),
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(3,'b','1ca53dcc50b68af86f4b1b4676dbed917b543c30'),
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(1,'b','2c01ac36c1ce9a7de66be89f85d8aa5f0052e2e8'),
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(4,'a','496c486b3a9edc439477fef7d34cbefdebba86df'),
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(3,'a','98bf72d8d467201058a5f69bd7709bfc74a8637e'),
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(2,'b','9a45425f6160fb59d7f8a02c721498d4ce945302'),
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(4,'b','9c9a7300f3e708f8e430f9f3376d966f5951f583'),
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(1,'a','c0af3f076b905f31cbb51af304b9c7ad539e0861');
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CREATE TABLE t10 (
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j1 tinyint NOT NULL, j2 varchar(20) NOT NULL, PRIMARY KEY (j1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t10 VALUES (1,'b'),(2,'c'),(3,'d');
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CREATE TABLE t11 (
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k1 int NOT NULL, k2 datetime DEFAULT NULL, k3 int DEFAULT NULL,
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k4 int DEFAULT NULL, PRIMARY KEY (k1), KEY k3 (k3), KEY k4 (k4)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t11 VALUES
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(317422,'2013-03-18 11:43:03',1,NULL),(317423,'2013-03-18 11:43:11',1,NULL),
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(317424,'2013-03-18 11:52:01',1,1),(317425,'2013-03-18 11:52:01',1,1),
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(317426,'2013-03-18 11:56:38',1,1),(317427,'2013-03-18 12:18:25',1,NULL),
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(317428,'2013-03-18 12:46:28',1,NULL),(317429,'2013-03-18 12:46:28',1,NULL),
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(317430,'2013-03-18 12:46:28',1,NULL),(317431,'2013-03-18 12:46:28',1,NULL),
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(317432,'2013-03-18 12:46:28',1,NULL),(317433,'2013-03-18 12:46:28',1,NULL),
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(317434,'2013-03-18 12:46:28',1,NULL),(317435,'2013-03-18 12:46:28',1,NULL),
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(317436,'2013-03-18 12:46:28',1,NULL),(317437,'2013-03-18 12:46:28',1,NULL),
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(317438,'2013-03-18 12:46:28',1,NULL),(317439,'2013-03-18 12:46:28',1,NULL),
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(317440,'2013-03-18 12:55:20',1,NULL),(317441,'2013-03-18 12:58:29',1,NULL),
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(317442,'2013-03-18 13:06:02',1,NULL),(317443,'2013-03-18 15:23:18',21,NULL);
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CREATE TABLE t12 (
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l1 int NOT NULL, l2 varchar(64) NOT NULL, PRIMARY KEY (l1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t12 VALUES
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(552,'59a498252ef59f96fbdc13a414abe244d8e8bc30'),
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(554,'c6025c7cb2d9dfb1be7ce4a61f35b45bb9e61ba3'),
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(555,'b245bcc672082bb6d10794b2b4ac972dd14b1cf5');
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CREATE TABLE t13 (
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m1 int NOT NULL, m2 int NOT NULL, m3 int NOT NULL,
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PRIMARY KEY (m1,m2,m3), KEY m3 (m3), KEY m2 (m2)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t13 VALUES (3324,43,4),(3332,263,1),(3348,27,3);
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CREATE TABLE t14 (
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n1 smallint NOT NULL, n2 varchar(64) NOT NULL, PRIMARY KEY (n1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t14 VALUES
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(21,'685bf7ca576af964c7cff564d5e4473b81499b8b'),
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(23,'b8e42dab1ab952406b3accfb47089c61478138a8'),
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(25,'3fea441e411db8c70bf039b50c8f18f59515be53'),
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(27,'998aecc30fd0e0b8a1cac6590e5eccc2d7822223');
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CREATE TABLE t15 (
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o1 smallint NOT NULL, PRIMARY KEY (o1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t15 VALUES (1),(3);
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CREATE TABLE t16 (
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p1 smallint NOT NULL, p2 varchar(7) NOT NULL, p3 varchar(64) NOT NULL,
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PRIMARY KEY (p1,p2)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO t16 VALUES
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(1,'a','66bdbb389456f3ae97206da115a7b397c31400e8'),
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(1,'b','66bdbb389456f3ae97206da115a7b397c31400e8'),
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(3,'a','386c10e454278c6e27feb16258089166422f79b4'),
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(3,'b','386c10e454278c6e27feb16258089166422f79b4');
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If to wrap the query $Q
select t3.c1,t5.e2,t1.a1,t14.n2,t16.p3,t10.j2,t7.g2,t11.k2,l3.l2,
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t9.i3,t12.l2 AS l_l2,l2.l2 AS l2_l2,l4.l1 AS l4_l1,t6.f1
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from
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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(
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t1
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left join t2 on t1.a1 = t2.b1
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)
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left join t3 on t2.b2 = t3.c1
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)
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left join t4 on t1.a2 = t4.d1
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)
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left join t5 on t4.d1 = t5.e1
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)
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left join t6 on t1.a3 = t6.f1
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)
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left join t5 e2 on t6.f1 = e2.e1
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)
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join t7 on t1.a7 = t7.g1
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)
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join t8 on t1.a4 = t8.h1
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)
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join t9 on t8.h1 = t9.i1
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)
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join t10 on t1.a6 = t10.j1
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)
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join t11 on t1.a5 = t11.k1
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)
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left join t12 on t11.k3 = t12.l1
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)
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left join t12 l2 on t11.k4 = l2.l1
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)
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left join t13 on t1.a1 = t13.m1 and t13.m3 = 4
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)
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left join t12 l4 on l4.l1 = t13.m2
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)
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left join t13 m2 on t1.a1 = m2.m1 and m2.m3 = 3
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)
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left join t12 l3 on l3.l1 = m2.m2
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)
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left join t14 on t1.a8 = t14.n1
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)
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left join t15 on t1.a9 = t15.o1
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)
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left join t16 on t15.o1 = t16.p1
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where t1.a10 = 1;
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into a view v1: create view v1 as $Q
then the command
explain select * from v1
will return an apparently invalid execution plan:
MariaDB [test]> explain select * from v1;
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+----+-------------+-------+--------+---------------+---------+---------+-------------+------+-------------------------------------------------+
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| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
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+----+-------------+-------+--------+---------------+---------+---------+-------------+------+-------------------------------------------------+
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| 1 | SIMPLE | t1 | ALL | a4,a6,a5,a7 | NULL | NULL | NULL | 3 | Using where |
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| 1 | SIMPLE | t2 | ref | PRIMARY | PRIMARY | 4 | test.t1.a1 | 1 | Using index |
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| 1 | SIMPLE | t15 | eq_ref | PRIMARY | PRIMARY | 2 | test.t1.a9 | 1 | Using where; Using index |
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| 1 | SIMPLE | t6 | eq_ref | PRIMARY | PRIMARY | 4 | test.t1.a3 | 1 | Using where; Using index |
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| 1 | SIMPLE | t13 | ref | PRIMARY,m3 | PRIMARY | 4 | test.t1.a1 | 1 | Using where; Using index |
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| 1 | SIMPLE | l4 | eq_ref | PRIMARY | PRIMARY | 4 | test.t13.m2 | 1 | Using where; Using index |
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| 1 | SIMPLE | m2 | ref | PRIMARY,m3 | PRIMARY | 4 | test.t1.a1 | 1 | Using where; Using index |
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| 1 | SIMPLE | l3 | eq_ref | PRIMARY | PRIMARY | 4 | test.m2.m2 | 1 | Using where |
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| 1 | SIMPLE | t8 | eq_ref | PRIMARY | PRIMARY | 1 | test.t1.a4 | 1 | Using index |
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| 1 | SIMPLE | t14 | eq_ref | PRIMARY | PRIMARY | 2 | test.t1.a8 | 1 | Using where |
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| 1 | SIMPLE | t16 | ref | PRIMARY | PRIMARY | 2 | test.t15.o1 | 1 | Using where |
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| 1 | SIMPLE | t4 | eq_ref | PRIMARY | PRIMARY | 4 | test.t1.a2 | 1 | Using index |
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| 1 | SIMPLE | t5 | eq_ref | PRIMARY | PRIMARY | 4 | test.t4.d1 | 1 | Using where |
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| 1 | SIMPLE | t7 | eq_ref | PRIMARY | PRIMARY | 1 | test.t1.a7 | 1 | |
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| 1 | SIMPLE | t9 | ref | PRIMARY | PRIMARY | 1 | test.t1.a4 | 1 | |
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| 1 | SIMPLE | t3 | eq_ref | PRIMARY | PRIMARY | 4 | test.t2.b2 | 1 | Using where; Using index |
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| 1 | SIMPLE | t11 | eq_ref | PRIMARY | PRIMARY | 4 | test.t1.a5 | 1 | |
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| 1 | SIMPLE | t12 | eq_ref | PRIMARY | PRIMARY | 4 | test.t11.k3 | 1 | Using where |
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| 1 | SIMPLE | l2 | eq_ref | PRIMARY | PRIMARY | 4 | test.t11.k4 | 1 | Using where |
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| 1 | SIMPLE | t10 | ALL | PRIMARY | NULL | NULL | NULL | 3 | Using where; Using join buffer (flat, BNL join) |
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+----+-------------+-------+--------+---------------+---------+---------+-------------+------+-------------------------------------------------+
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20 rows in set (58.72 sec)
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For example, in any valid execution plan table t15 must be accessed after table t13.