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63bca358ca
The bug is repeatable with latest(1.0.1) InnoDB plugin on Linux, Win, If MySQL is compiled with valgrind there are errors about using of uninitialized variable(orig_table). The fix is to set field->orig_table correct value.
1271 lines
34 KiB
Plaintext
1271 lines
34 KiB
Plaintext
drop table if exists t1,t2,t3,t4;
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create table t1 (
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c_id int(11) not null default '0',
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org_id int(11) default null,
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unique key contacts$c_id (c_id),
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key contacts$org_id (org_id)
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) engine=innodb;
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insert into t1 values
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(2,null),(120,null),(141,null),(218,7), (128,1),
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(151,2),(234,2),(236,2),(243,2),(255,2),(259,2),(232,3),(235,3),(238,3),
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(246,3),(253,3),(269,3),(285,3),(291,3),(293,3),(131,4),(230,4),(231,4);
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create table t2 (
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slai_id int(11) not null default '0',
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owner_tbl int(11) default null,
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owner_id int(11) default null,
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sla_id int(11) default null,
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inc_web int(11) default null,
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inc_email int(11) default null,
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inc_chat int(11) default null,
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inc_csr int(11) default null,
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inc_total int(11) default null,
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time_billed int(11) default null,
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activedate timestamp null default null,
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expiredate timestamp null default null,
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state int(11) default null,
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sla_set int(11) default null,
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unique key t2$slai_id (slai_id),
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key t2$owner_id (owner_id),
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key t2$sla_id (sla_id)
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) engine=innodb;
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insert into t2(slai_id, owner_tbl, owner_id, sla_id) values
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(1,3,1,1), (3,3,10,2), (4,3,3,6), (5,3,2,5), (6,3,8,3), (7,3,9,7),
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(8,3,6,8), (9,3,4,9), (10,3,5,10), (11,3,11,11), (12,3,7,12);
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flush tables;
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select si.slai_id
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from t1 c join t2 si on
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((si.owner_tbl = 3 and si.owner_id = c.org_id) or
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( si.owner_tbl = 2 and si.owner_id = c.c_id))
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where
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c.c_id = 218 and expiredate is null;
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slai_id
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12
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select * from t1 where org_id is null;
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c_id org_id
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2 NULL
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120 NULL
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141 NULL
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select si.slai_id
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from t1 c join t2 si on
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((si.owner_tbl = 3 and si.owner_id = c.org_id) or
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( si.owner_tbl = 2 and si.owner_id = c.c_id))
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where
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c.c_id = 218 and expiredate is null;
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slai_id
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12
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drop table t1, t2;
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CREATE TABLE t1 (a int, b int, KEY b (b)) Engine=InnoDB;
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CREATE TABLE t2 (a int, b int, PRIMARY KEY (a,b)) Engine=InnoDB;
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CREATE TABLE t3 (a int, b int, c int, PRIMARY KEY (a),
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UNIQUE KEY b (b,c), KEY a (a,b,c)) Engine=InnoDB;
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INSERT INTO t1 VALUES (1, 1);
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INSERT INTO t1 SELECT a + 1, b + 1 FROM t1;
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INSERT INTO t1 SELECT a + 2, b + 2 FROM t1;
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INSERT INTO t2 VALUES (1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(1,8);
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INSERT INTO t2 SELECT a + 1, b FROM t2;
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DELETE FROM t2 WHERE a = 1 AND b < 2;
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INSERT INTO t3 VALUES (1,1,1),(2,1,2);
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INSERT INTO t3 SELECT a + 2, a + 2, 3 FROM t3;
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INSERT INTO t3 SELECT a + 4, a + 4, 3 FROM t3;
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SELECT STRAIGHT_JOIN SQL_NO_CACHE t1.b, t1.a FROM t1, t3, t2 WHERE
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t3.a = t2.a AND t2.b = t1.a AND t3.b = 1 AND t3.c IN (1, 2)
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ORDER BY t1.b LIMIT 2;
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b a
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1 1
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2 2
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SELECT STRAIGHT_JOIN SQL_NO_CACHE t1.b, t1.a FROM t1, t3, t2 WHERE
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t3.a = t2.a AND t2.b = t1.a AND t3.b = 1 AND t3.c IN (1, 2)
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ORDER BY t1.b LIMIT 5;
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b a
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1 1
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2 2
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2 2
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3 3
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3 3
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DROP TABLE t1, t2, t3;
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CREATE TABLE `t1` (`id1` INT) ;
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INSERT INTO `t1` (`id1`) VALUES (1),(5),(2);
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CREATE TABLE `t2` (
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`id1` INT,
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`id2` INT NOT NULL,
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`id3` INT,
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`id4` INT NOT NULL,
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UNIQUE (`id2`,`id4`),
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KEY (`id1`)
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) ENGINE=InnoDB;
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INSERT INTO `t2`(`id1`,`id2`,`id3`,`id4`) VALUES
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(1,1,1,0),
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(1,1,2,1),
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(5,1,2,2),
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(6,1,2,3),
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(1,2,2,2),
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(1,2,1,1);
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SELECT `id1` FROM `t1` WHERE `id1` NOT IN (SELECT `id1` FROM `t2` WHERE `id2` = 1 AND `id3` = 2);
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id1
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2
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DROP TABLE t1, t2;
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create table t1 (c1 int) engine=innodb;
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handler t1 open;
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handler t1 read first;
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c1
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Before and after comparison
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0
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drop table t1;
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CREATE TABLE t1(c1 TEXT, UNIQUE (c1(1)), cnt INT DEFAULT 1)
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ENGINE=INNODB CHARACTER SET UTF8;
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INSERT INTO t1 (c1) VALUES ('1a');
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SELECT * FROM t1;
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c1 cnt
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1a 1
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INSERT INTO t1 (c1) VALUES ('1b') ON DUPLICATE KEY UPDATE cnt=cnt+1;
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SELECT * FROM t1;
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c1 cnt
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1a 2
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DROP TABLE t1;
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CREATE TABLE t1(c1 VARCHAR(2), UNIQUE (c1(1)), cnt INT DEFAULT 1)
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ENGINE=INNODB CHARACTER SET UTF8;
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INSERT INTO t1 (c1) VALUES ('1a');
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SELECT * FROM t1;
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c1 cnt
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1a 1
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INSERT INTO t1 (c1) VALUES ('1b') ON DUPLICATE KEY UPDATE cnt=cnt+1;
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SELECT * FROM t1;
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c1 cnt
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1a 2
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DROP TABLE t1;
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CREATE TABLE t1(c1 CHAR(2), UNIQUE (c1(1)), cnt INT DEFAULT 1)
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ENGINE=INNODB CHARACTER SET UTF8;
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INSERT INTO t1 (c1) VALUES ('1a');
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SELECT * FROM t1;
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c1 cnt
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1a 1
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INSERT INTO t1 (c1) VALUES ('1b') ON DUPLICATE KEY UPDATE cnt=cnt+1;
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SELECT * FROM t1;
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c1 cnt
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1a 2
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DROP TABLE t1;
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CREATE TABLE t1 (
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a1 decimal(10,0) DEFAULT NULL,
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a2 blob,
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a3 time DEFAULT NULL,
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a4 blob,
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a5 char(175) DEFAULT NULL,
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a6 timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
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a7 tinyblob,
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INDEX idx (a6,a7(239),a5)
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) ENGINE=InnoDB;
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EXPLAIN SELECT a4 FROM t1 WHERE
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a6=NULL AND
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a4='UNcT5pIde4I6c2SheTo4gt92OV1jgJCVkXmzyf325R1DwLURkbYHwhydANIZMbKTgdcR5xS';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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EXPLAIN SELECT t1.a4 FROM t1, t1 t WHERE
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t.a6=t.a6 AND t1.a6=NULL AND
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t1.a4='UNcT5pIde4I6c2SheTo4gt92OV1jgJCVkXmzyf325R1DwLURkbYHwhydANIZMbKTgdcR5xS';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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DROP TABLE t1;
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End of 4.1 tests
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create table t1m (a int) engine=myisam;
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create table t1i (a int) engine=innodb;
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create table t2m (a int) engine=myisam;
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create table t2i (a int) engine=innodb;
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insert into t2m values (5);
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insert into t2i values (5);
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select min(a) from t1m;
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min(a)
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NULL
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select min(7) from t1m;
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min(7)
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NULL
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select min(7) from DUAL;
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min(7)
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7
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explain select min(7) from t2m join t1m;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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select min(7) from t2m join t1m;
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min(7)
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NULL
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select max(a) from t1m;
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max(a)
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NULL
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select max(7) from t1m;
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max(7)
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NULL
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select max(7) from DUAL;
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max(7)
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7
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explain select max(7) from t2m join t1m;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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select max(7) from t2m join t1m;
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max(7)
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NULL
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select 1, min(a) from t1m where a=99;
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1 min(a)
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1 NULL
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select 1, min(a) from t1m where 1=99;
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1 min(a)
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1 NULL
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select 1, min(1) from t1m where a=99;
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1 min(1)
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1 NULL
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select 1, min(1) from t1m where 1=99;
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1 min(1)
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1 NULL
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select 1, max(a) from t1m where a=99;
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1 max(a)
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1 NULL
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select 1, max(a) from t1m where 1=99;
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1 max(a)
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1 NULL
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select 1, max(1) from t1m where a=99;
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1 max(1)
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1 NULL
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select 1, max(1) from t1m where 1=99;
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1 max(1)
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1 NULL
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select min(a) from t1i;
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min(a)
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NULL
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select min(7) from t1i;
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min(7)
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NULL
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select min(7) from DUAL;
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min(7)
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7
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explain select min(7) from t2i join t1i;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2i ALL NULL NULL NULL NULL 1
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1 SIMPLE t1i ALL NULL NULL NULL NULL 1
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select min(7) from t2i join t1i;
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min(7)
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NULL
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select max(a) from t1i;
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max(a)
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NULL
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select max(7) from t1i;
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max(7)
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NULL
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select max(7) from DUAL;
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max(7)
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7
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explain select max(7) from t2i join t1i;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2i ALL NULL NULL NULL NULL 1
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1 SIMPLE t1i ALL NULL NULL NULL NULL 1
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select max(7) from t2i join t1i;
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max(7)
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NULL
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select 1, min(a) from t1i where a=99;
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1 min(a)
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1 NULL
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select 1, min(a) from t1i where 1=99;
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1 min(a)
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1 NULL
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select 1, min(1) from t1i where a=99;
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1 min(1)
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1 NULL
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select 1, min(1) from t1i where 1=99;
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1 min(1)
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1 NULL
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select 1, max(a) from t1i where a=99;
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1 max(a)
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1 NULL
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select 1, max(a) from t1i where 1=99;
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1 max(a)
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1 NULL
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select 1, max(1) from t1i where a=99;
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1 max(1)
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1 NULL
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select 1, max(1) from t1i where 1=99;
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1 max(1)
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1 NULL
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explain select count(*), min(7), max(7) from t1m, t1i;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1m system NULL NULL NULL NULL 0 const row not found
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1 SIMPLE t1i ALL NULL NULL NULL NULL 1
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select count(*), min(7), max(7) from t1m, t1i;
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count(*) min(7) max(7)
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0 NULL NULL
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explain select count(*), min(7), max(7) from t1m, t2i;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1m system NULL NULL NULL NULL 0 const row not found
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1 SIMPLE t2i ALL NULL NULL NULL NULL 1
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select count(*), min(7), max(7) from t1m, t2i;
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count(*) min(7) max(7)
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0 NULL NULL
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explain select count(*), min(7), max(7) from t2m, t1i;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2m system NULL NULL NULL NULL 1
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1 SIMPLE t1i ALL NULL NULL NULL NULL 1
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select count(*), min(7), max(7) from t2m, t1i;
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count(*) min(7) max(7)
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0 NULL NULL
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drop table t1m, t1i, t2m, t2i;
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create table t1 (
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a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(64) default ' '
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);
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insert into t1 (a1, a2, b, c, d) values
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('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
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('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
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('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
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('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
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('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
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('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
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('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
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('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
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('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
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('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
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('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
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('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
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('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
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('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
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('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
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('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'),
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('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
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('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
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('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
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('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
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('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
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('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
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('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
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('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
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('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
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('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
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('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
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('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
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('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
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('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
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('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
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('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4');
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create table t4 (
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pk_col int auto_increment primary key, a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(64) default ' '
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) engine=innodb;
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insert into t4 (a1, a2, b, c, d, dummy) select * from t1;
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create index idx12672_0 on t4 (a1);
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create index idx12672_1 on t4 (a1,a2,b,c);
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create index idx12672_2 on t4 (a1,a2,b);
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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status OK
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select distinct a1 from t4 where pk_col not in (1,2,3,4);
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a1
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a
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b
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c
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d
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drop table t1,t4;
|
|
DROP TABLE IF EXISTS t2, t1;
|
|
CREATE TABLE t1 (i INT NOT NULL PRIMARY KEY) ENGINE= InnoDB;
|
|
CREATE TABLE t2 (
|
|
i INT NOT NULL,
|
|
FOREIGN KEY (i) REFERENCES t1 (i) ON DELETE NO ACTION
|
|
) ENGINE= InnoDB;
|
|
INSERT INTO t1 VALUES (1);
|
|
INSERT INTO t2 VALUES (1);
|
|
DELETE IGNORE FROM t1 WHERE i = 1;
|
|
Warnings:
|
|
Error 1451 Cannot delete or update a parent row: a foreign key constraint fails (`test/t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`i`) REFERENCES `t1` (`i`) ON DELETE NO ACTION)
|
|
SELECT * FROM t1, t2;
|
|
i i
|
|
1 1
|
|
DROP TABLE t2, t1;
|
|
End of 4.1 tests.
|
|
create table t1 (
|
|
a varchar(30), b varchar(30), primary key(a), key(b)
|
|
) engine=innodb;
|
|
select distinct a from t1;
|
|
a
|
|
drop table t1;
|
|
create table t1(a int, key(a)) engine=innodb;
|
|
insert into t1 values(1);
|
|
select a, count(a) from t1 group by a with rollup;
|
|
a count(a)
|
|
1 1
|
|
NULL 1
|
|
drop table t1;
|
|
create table t1 (f1 int, f2 char(1), primary key(f1,f2)) engine=innodb;
|
|
insert into t1 values ( 1,"e"),(2,"a"),( 3,"c"),(4,"d");
|
|
alter table t1 drop primary key, add primary key (f2, f1);
|
|
explain select distinct f1 a, f1 b from t1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 index NULL PRIMARY 5 NULL 4 Using index; Using temporary
|
|
explain select distinct f1, f2 from t1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range NULL PRIMARY 5 NULL 3 Using index for group-by; Using temporary
|
|
drop table t1;
|
|
CREATE TABLE t1 (id int(11) NOT NULL PRIMARY KEY, name varchar(20),
|
|
INDEX (name)) ENGINE=InnoDB;
|
|
CREATE TABLE t2 (id int(11) NOT NULL PRIMARY KEY, fkey int(11),
|
|
FOREIGN KEY (fkey) REFERENCES t2(id)) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES (1,'A1'),(2,'A2'),(3,'B');
|
|
INSERT INTO t2 VALUES (1,1),(2,2),(3,2),(4,3),(5,3);
|
|
EXPLAIN
|
|
SELECT COUNT(*) FROM t2 LEFT JOIN t1 ON t2.fkey = t1.id
|
|
WHERE t1.name LIKE 'A%';
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 index PRIMARY,name name 23 NULL 3 Using where; Using index
|
|
1 SIMPLE t2 ref fkey fkey 5 test.t1.id 1 Using where; Using index
|
|
EXPLAIN
|
|
SELECT COUNT(*) FROM t2 LEFT JOIN t1 ON t2.fkey = t1.id
|
|
WHERE t1.name LIKE 'A%' OR FALSE;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 index NULL fkey 5 NULL 5 Using index
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.fkey 1 Using where
|
|
DROP TABLE t1,t2;
|
|
create table t1(f1 varchar(800) binary not null, key(f1)) engine = innodb
|
|
character set utf8 collate utf8_general_ci;
|
|
Warnings:
|
|
Warning 1071 Specified key was too long; max key length is 767 bytes
|
|
insert into t1 values('aaa');
|
|
drop table t1;
|
|
CREATE TABLE t1 (a INT PRIMARY KEY, b INT, c FLOAT, KEY b(b)) ENGINE = INNODB;
|
|
INSERT INTO t1 VALUES ( 1 , 1 , 1);
|
|
INSERT INTO t1 SELECT a + 1 , MOD(a + 1 , 20), 1 FROM t1;
|
|
INSERT INTO t1 SELECT a + 2 , MOD(a + 2 , 20), 1 FROM t1;
|
|
INSERT INTO t1 SELECT a + 4 , MOD(a + 4 , 20), 1 FROM t1;
|
|
INSERT INTO t1 SELECT a + 8 , MOD(a + 8 , 20), 1 FROM t1;
|
|
INSERT INTO t1 SELECT a + 16, MOD(a + 16, 20), 1 FROM t1;
|
|
INSERT INTO t1 SELECT a + 32, MOD(a + 32, 20), 1 FROM t1;
|
|
INSERT INTO t1 SELECT a + 64, MOD(a + 64, 20), 1 FROM t1;
|
|
EXPLAIN SELECT b, SUM(c) FROM t1 GROUP BY b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 index NULL b 5 NULL 128
|
|
EXPLAIN SELECT SQL_BIG_RESULT b, SUM(c) FROM t1 GROUP BY b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using filesort
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (
|
|
id int NOT NULL,
|
|
name varchar(20) NOT NULL,
|
|
dept varchar(20) NOT NULL,
|
|
age tinyint(3) unsigned NOT NULL,
|
|
PRIMARY KEY (id),
|
|
INDEX (name,dept)
|
|
) ENGINE=InnoDB;
|
|
INSERT INTO t1(id, dept, age, name) VALUES
|
|
(3987, 'cs1', 10, 'rs1'), (3988, 'cs2', 20, 'rs1'), (3995, 'cs3', 10, 'rs2'),
|
|
(3996, 'cs4', 20, 'rs2'), (4003, 'cs5', 10, 'rs3'), (4004, 'cs6', 20, 'rs3'),
|
|
(4011, 'cs7', 10, 'rs4'), (4012, 'cs8', 20, 'rs4'), (4019, 'cs9', 10, 'rs5'),
|
|
(4020, 'cs10', 20, 'rs5'),(4027, 'cs11', 10, 'rs6'),(4028, 'cs12', 20, 'rs6');
|
|
EXPLAIN SELECT DISTINCT t1.name, t1.dept FROM t1 WHERE t1.name='rs5';
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range name name 44 NULL 2 Using where; Using index for group-by
|
|
SELECT DISTINCT t1.name, t1.dept FROM t1 WHERE t1.name='rs5';
|
|
name dept
|
|
rs5 cs10
|
|
rs5 cs9
|
|
DELETE FROM t1;
|
|
EXPLAIN SELECT DISTINCT t1.name, t1.dept FROM t1 WHERE t1.name='rs5';
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range name name 44 NULL 2 Using where; Using index for group-by
|
|
SELECT DISTINCT t1.name, t1.dept FROM t1 WHERE t1.name='rs5';
|
|
name dept
|
|
DROP TABLE t1;
|
|
show variables like 'innodb_rollback_on_timeout';
|
|
Variable_name Value
|
|
innodb_rollback_on_timeout OFF
|
|
create table t1 (a int unsigned not null primary key) engine = innodb;
|
|
insert into t1 values (1);
|
|
commit;
|
|
begin work;
|
|
insert into t1 values (2);
|
|
select * from t1;
|
|
a
|
|
1
|
|
2
|
|
begin work;
|
|
insert into t1 values (5);
|
|
select * from t1;
|
|
a
|
|
1
|
|
5
|
|
insert into t1 values (2);
|
|
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
|
|
select * from t1;
|
|
a
|
|
1
|
|
5
|
|
commit;
|
|
select * from t1;
|
|
a
|
|
1
|
|
2
|
|
commit;
|
|
select * from t1;
|
|
a
|
|
1
|
|
2
|
|
5
|
|
drop table t1;
|
|
set @save_qcache_size=@@global.query_cache_size;
|
|
set @save_qcache_type=@@global.query_cache_type;
|
|
set global query_cache_size=10*1024*1024;
|
|
set global query_cache_type=1;
|
|
drop table if exists `test`;
|
|
Warnings:
|
|
Note 1051 Unknown table 'test'
|
|
CREATE TABLE `test` (`test1` varchar(3) NOT NULL,
|
|
`test2` varchar(4) NOT NULL,PRIMARY KEY (`test1`))
|
|
ENGINE=InnoDB DEFAULT CHARSET=latin1;
|
|
INSERT INTO `test` (`test1`, `test2`) VALUES ('tes', '5678');
|
|
select * from test;
|
|
test1 test2
|
|
tes 5678
|
|
INSERT INTO `test` (`test1`, `test2`) VALUES ('tes', '1234')
|
|
ON DUPLICATE KEY UPDATE `test2` = '1234';
|
|
select * from test;
|
|
test1 test2
|
|
tes 1234
|
|
flush tables;
|
|
select * from test;
|
|
test1 test2
|
|
tes 1234
|
|
drop table test;
|
|
set global query_cache_type=@save_qcache_type;
|
|
set global query_cache_size=@save_qcache_size;
|
|
create table t1(
|
|
id int auto_increment,
|
|
c char(1) not null,
|
|
counter int not null default 1,
|
|
primary key (id),
|
|
unique key (c)
|
|
) engine=innodb;
|
|
insert into t1 (id, c) values
|
|
(NULL, 'a'),
|
|
(NULL, 'a')
|
|
on duplicate key update id = values(id), counter = counter + 1;
|
|
select * from t1;
|
|
id c counter
|
|
2 a 2
|
|
insert into t1 (id, c) values
|
|
(NULL, 'b')
|
|
on duplicate key update id = values(id), counter = counter + 1;
|
|
select * from t1;
|
|
id c counter
|
|
2 a 2
|
|
3 b 1
|
|
truncate table t1;
|
|
insert into t1 (id, c) values (NULL, 'a');
|
|
select * from t1;
|
|
id c counter
|
|
1 a 1
|
|
insert into t1 (id, c) values (NULL, 'b'), (NULL, 'b')
|
|
on duplicate key update id = values(id), c = values(c), counter = counter + 1;
|
|
select * from t1;
|
|
id c counter
|
|
1 a 1
|
|
3 b 2
|
|
insert into t1 (id, c) values (NULL, 'a')
|
|
on duplicate key update id = values(id), c = values(c), counter = counter + 1;
|
|
select * from t1;
|
|
id c counter
|
|
3 b 2
|
|
4 a 2
|
|
drop table t1;
|
|
CREATE TABLE t1(
|
|
id int AUTO_INCREMENT PRIMARY KEY,
|
|
stat_id int NOT NULL,
|
|
acct_id int DEFAULT NULL,
|
|
INDEX idx1 (stat_id, acct_id),
|
|
INDEX idx2 (acct_id)
|
|
) ENGINE=MyISAM;
|
|
CREATE TABLE t2(
|
|
id int AUTO_INCREMENT PRIMARY KEY,
|
|
stat_id int NOT NULL,
|
|
acct_id int DEFAULT NULL,
|
|
INDEX idx1 (stat_id, acct_id),
|
|
INDEX idx2 (acct_id)
|
|
) ENGINE=InnoDB;
|
|
INSERT INTO t1(stat_id,acct_id) VALUES
|
|
(1,759), (2,831), (3,785), (4,854), (1,921),
|
|
(1,553), (2,589), (3,743), (2,827), (2,545),
|
|
(4,779), (4,783), (1,597), (1,785), (4,832),
|
|
(1,741), (1,833), (3,788), (2,973), (1,907);
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
INSERT INTO t1(stat_id,acct_id) SELECT stat_id, mod(id+100000, acct_id) FROM t1;
|
|
UPDATE t1 SET acct_id=785
|
|
WHERE MOD(stat_id,2)=0 AND MOD(id,stat_id)=MOD(acct_id,stat_id);
|
|
OPTIMIZE TABLE t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 optimize status OK
|
|
SELECT COUNT(*) FROM t1;
|
|
COUNT(*)
|
|
40960
|
|
SELECT COUNT(*) FROM t1 WHERE acct_id=785;
|
|
COUNT(*)
|
|
8702
|
|
EXPLAIN SELECT COUNT(*) FROM t1 WHERE stat_id IN (1,3) AND acct_id=785;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range idx1,idx2 idx1 9 NULL 2 Using where; Using index
|
|
INSERT INTO t2 SELECT * FROM t1;
|
|
OPTIMIZE TABLE t2;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 optimize status OK
|
|
EXPLAIN SELECT COUNT(*) FROM t2 WHERE stat_id IN (1,3) AND acct_id=785;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 range idx1,idx2 idx1 9 NULL 2 Using where; Using index
|
|
DROP TABLE t1,t2;
|
|
create table t1(a int) engine=innodb;
|
|
alter table t1 comment '123';
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) default NULL
|
|
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='123'
|
|
drop table t1;
|
|
CREATE TABLE t1 (a CHAR(2), KEY (a)) ENGINE = InnoDB DEFAULT CHARSET=UTF8;
|
|
INSERT INTO t1 VALUES ('uk'),('bg');
|
|
SELECT * FROM t1 WHERE a = 'uk';
|
|
a
|
|
uk
|
|
DELETE FROM t1 WHERE a = 'uk';
|
|
SELECT * FROM t1 WHERE a = 'uk';
|
|
a
|
|
UPDATE t1 SET a = 'us' WHERE a = 'uk';
|
|
SELECT * FROM t1 WHERE a = 'uk';
|
|
a
|
|
CREATE TABLE t2 (a CHAR(2), KEY (a)) ENGINE = InnoDB;
|
|
INSERT INTO t2 VALUES ('uk'),('bg');
|
|
SELECT * FROM t2 WHERE a = 'uk';
|
|
a
|
|
uk
|
|
DELETE FROM t2 WHERE a = 'uk';
|
|
SELECT * FROM t2 WHERE a = 'uk';
|
|
a
|
|
INSERT INTO t2 VALUES ('uk');
|
|
UPDATE t2 SET a = 'us' WHERE a = 'uk';
|
|
SELECT * FROM t2 WHERE a = 'uk';
|
|
a
|
|
CREATE TABLE t3 (a CHAR(2), KEY (a)) ENGINE = MyISAM;
|
|
INSERT INTO t3 VALUES ('uk'),('bg');
|
|
SELECT * FROM t3 WHERE a = 'uk';
|
|
a
|
|
uk
|
|
DELETE FROM t3 WHERE a = 'uk';
|
|
SELECT * FROM t3 WHERE a = 'uk';
|
|
a
|
|
INSERT INTO t3 VALUES ('uk');
|
|
UPDATE t3 SET a = 'us' WHERE a = 'uk';
|
|
SELECT * FROM t3 WHERE a = 'uk';
|
|
a
|
|
DROP TABLE t1,t2,t3;
|
|
create table t1 (a int) engine=innodb;
|
|
select * from t2;
|
|
ERROR 42S02: Table 'test.t2' doesn't exist
|
|
drop table t1;
|
|
drop table t2;
|
|
ERROR 42S02: Unknown table 't2'
|
|
create table t2 (a int);
|
|
drop table t2;
|
|
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
|
|
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
|
|
switch to connection c1
|
|
SET AUTOCOMMIT=0;
|
|
INSERT INTO t2 VALUES (1);
|
|
switch to connection c2
|
|
SET AUTOCOMMIT=0;
|
|
LOCK TABLES t1 READ, t2 READ;
|
|
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
|
|
switch to connection c1
|
|
COMMIT;
|
|
INSERT INTO t1 VALUES (1);
|
|
switch to connection default
|
|
SET AUTOCOMMIT=default;
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (
|
|
id int NOT NULL auto_increment PRIMARY KEY,
|
|
b int NOT NULL,
|
|
c datetime NOT NULL,
|
|
INDEX idx_b(b),
|
|
INDEX idx_c(c)
|
|
) ENGINE=InnoDB;
|
|
CREATE TABLE t2 (
|
|
b int NOT NULL auto_increment PRIMARY KEY,
|
|
c datetime NOT NULL
|
|
) ENGINE= MyISAM;
|
|
INSERT INTO t2(c) VALUES ('2007-01-01');
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t2(c) SELECT c FROM t2;
|
|
INSERT INTO t1(b,c) SELECT b,c FROM t2;
|
|
UPDATE t2 SET c='2007-01-02';
|
|
INSERT INTO t1(b,c) SELECT b,c FROM t2;
|
|
UPDATE t2 SET c='2007-01-03';
|
|
INSERT INTO t1(b,c) SELECT b,c FROM t2;
|
|
set @@sort_buffer_size=8192;
|
|
Warnings:
|
|
Warning 1292 Truncated incorrect sort_buffer_size value: '8192'
|
|
SELECT COUNT(*) FROM t1;
|
|
COUNT(*)
|
|
3072
|
|
EXPLAIN
|
|
SELECT COUNT(*) FROM t1
|
|
WHERE (c >= '2007-01-02' AND c <= '2007-01-03') OR b >= 1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL idx_b,idx_c NULL NULL NULL # Using where
|
|
SELECT COUNT(*) FROM t1
|
|
WHERE (c >= '2007-01-02' AND c <= '2007-01-03') OR b >= 1;
|
|
COUNT(*)
|
|
3072
|
|
EXPLAIN
|
|
SELECT COUNT(*) FROM t1 FORCE INDEX(idx_b, idx_c)
|
|
WHERE (c >= '2007-01-02' AND c <= '2007-01-03') OR b >= 1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 index_merge idx_b,idx_c idx_c,idx_b 8,4 NULL # Using sort_union(idx_c,idx_b); Using where
|
|
SELECT COUNT(*) FROM t1 FORCE INDEX(idx_b, idx_c)
|
|
WHERE (c >= '2007-01-02' AND c <= '2007-01-03') OR b >= 1;
|
|
COUNT(*)
|
|
3072
|
|
set @@sort_buffer_size=default;
|
|
DROP TABLE t1,t2;
|
|
drop table if exists t1;
|
|
create table t1 (a int) engine=innodb;
|
|
alter table t1 alter a set default 1;
|
|
drop table t1;
|
|
|
|
Bug#24918 drop table and lock / inconsistent between
|
|
perm and temp tables
|
|
|
|
Check transactional tables under LOCK TABLES
|
|
|
|
drop table if exists t24918, t24918_tmp, t24918_trans, t24918_trans_tmp,
|
|
t24918_access;
|
|
create table t24918_access (id int);
|
|
create table t24918 (id int) engine=myisam;
|
|
create temporary table t24918_tmp (id int) engine=myisam;
|
|
create table t24918_trans (id int) engine=innodb;
|
|
create temporary table t24918_trans_tmp (id int) engine=innodb;
|
|
lock table t24918 write, t24918_tmp write, t24918_trans write, t24918_trans_tmp write;
|
|
drop table t24918;
|
|
select * from t24918_access;
|
|
ERROR HY000: Table 't24918_access' was not locked with LOCK TABLES
|
|
drop table t24918_trans;
|
|
select * from t24918_access;
|
|
ERROR HY000: Table 't24918_access' was not locked with LOCK TABLES
|
|
drop table t24918_trans_tmp;
|
|
select * from t24918_access;
|
|
ERROR HY000: Table 't24918_access' was not locked with LOCK TABLES
|
|
drop table t24918_tmp;
|
|
select * from t24918_access;
|
|
ERROR HY000: Table 't24918_access' was not locked with LOCK TABLES
|
|
unlock tables;
|
|
drop table t24918_access;
|
|
CREATE TABLE t1 (a int, b int, PRIMARY KEY (a), KEY bkey (b)) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES (1,2),(3,2),(2,2),(4,2),(5,2),(6,2),(7,2),(8,2);
|
|
INSERT INTO t1 SELECT a + 8, 2 FROM t1;
|
|
INSERT INTO t1 SELECT a + 16, 1 FROM t1;
|
|
EXPLAIN SELECT * FROM t1 WHERE b=2 ORDER BY a;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type ref
|
|
possible_keys bkey
|
|
key bkey
|
|
key_len 5
|
|
ref const
|
|
rows 16
|
|
Extra Using where; Using index
|
|
SELECT * FROM t1 WHERE b=2 ORDER BY a;
|
|
a b
|
|
1 2
|
|
2 2
|
|
3 2
|
|
4 2
|
|
5 2
|
|
6 2
|
|
7 2
|
|
8 2
|
|
9 2
|
|
10 2
|
|
11 2
|
|
12 2
|
|
13 2
|
|
14 2
|
|
15 2
|
|
16 2
|
|
EXPLAIN SELECT * FROM t1 WHERE b BETWEEN 1 AND 2 ORDER BY a;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type range
|
|
possible_keys bkey
|
|
key bkey
|
|
key_len 5
|
|
ref NULL
|
|
rows 16
|
|
Extra Using where; Using index; Using filesort
|
|
SELECT * FROM t1 WHERE b BETWEEN 1 AND 2 ORDER BY a;
|
|
a b
|
|
1 2
|
|
2 2
|
|
3 2
|
|
4 2
|
|
5 2
|
|
6 2
|
|
7 2
|
|
8 2
|
|
9 2
|
|
10 2
|
|
11 2
|
|
12 2
|
|
13 2
|
|
14 2
|
|
15 2
|
|
16 2
|
|
17 1
|
|
18 1
|
|
19 1
|
|
20 1
|
|
21 1
|
|
22 1
|
|
23 1
|
|
24 1
|
|
25 1
|
|
26 1
|
|
27 1
|
|
28 1
|
|
29 1
|
|
30 1
|
|
31 1
|
|
32 1
|
|
EXPLAIN SELECT * FROM t1 WHERE b BETWEEN 1 AND 2 ORDER BY b,a;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type range
|
|
possible_keys bkey
|
|
key bkey
|
|
key_len 5
|
|
ref NULL
|
|
rows 16
|
|
Extra Using where; Using index
|
|
SELECT * FROM t1 WHERE b BETWEEN 1 AND 2 ORDER BY b,a;
|
|
a b
|
|
17 1
|
|
18 1
|
|
19 1
|
|
20 1
|
|
21 1
|
|
22 1
|
|
23 1
|
|
24 1
|
|
25 1
|
|
26 1
|
|
27 1
|
|
28 1
|
|
29 1
|
|
30 1
|
|
31 1
|
|
32 1
|
|
1 2
|
|
2 2
|
|
3 2
|
|
4 2
|
|
5 2
|
|
6 2
|
|
7 2
|
|
8 2
|
|
9 2
|
|
10 2
|
|
11 2
|
|
12 2
|
|
13 2
|
|
14 2
|
|
15 2
|
|
16 2
|
|
CREATE TABLE t2 (a int, b int, c int, PRIMARY KEY (a), KEY bkey (b,c))
|
|
ENGINE=InnoDB;
|
|
INSERT INTO t2 VALUES (1,1,1),(3,1,1),(2,1,1),(4,1,1);
|
|
INSERT INTO t2 SELECT a + 4, 1, 1 FROM t2;
|
|
INSERT INTO t2 SELECT a + 8, 1, 1 FROM t2;
|
|
EXPLAIN SELECT * FROM t2 WHERE b=1 ORDER BY a;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t2
|
|
type ref
|
|
possible_keys bkey
|
|
key bkey
|
|
key_len 5
|
|
ref const
|
|
rows 8
|
|
Extra Using where; Using index; Using filesort
|
|
SELECT * FROM t2 WHERE b=1 ORDER BY a;
|
|
a b c
|
|
1 1 1
|
|
2 1 1
|
|
3 1 1
|
|
4 1 1
|
|
5 1 1
|
|
6 1 1
|
|
7 1 1
|
|
8 1 1
|
|
9 1 1
|
|
10 1 1
|
|
11 1 1
|
|
12 1 1
|
|
13 1 1
|
|
14 1 1
|
|
15 1 1
|
|
16 1 1
|
|
EXPLAIN SELECT * FROM t2 WHERE b=1 AND c=1 ORDER BY a;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t2
|
|
type ref
|
|
possible_keys bkey
|
|
key bkey
|
|
key_len 10
|
|
ref const,const
|
|
rows 8
|
|
Extra Using where; Using index
|
|
SELECT * FROM t2 WHERE b=1 AND c=1 ORDER BY a;
|
|
a b c
|
|
1 1 1
|
|
2 1 1
|
|
3 1 1
|
|
4 1 1
|
|
5 1 1
|
|
6 1 1
|
|
7 1 1
|
|
8 1 1
|
|
9 1 1
|
|
10 1 1
|
|
11 1 1
|
|
12 1 1
|
|
13 1 1
|
|
14 1 1
|
|
15 1 1
|
|
16 1 1
|
|
EXPLAIN SELECT * FROM t2 WHERE b=1 AND c=1 ORDER BY b,c,a;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t2
|
|
type ref
|
|
possible_keys bkey
|
|
key bkey
|
|
key_len 10
|
|
ref const,const
|
|
rows 8
|
|
Extra Using where; Using index
|
|
SELECT * FROM t2 WHERE b=1 AND c=1 ORDER BY b,c,a;
|
|
a b c
|
|
1 1 1
|
|
2 1 1
|
|
3 1 1
|
|
4 1 1
|
|
5 1 1
|
|
6 1 1
|
|
7 1 1
|
|
8 1 1
|
|
9 1 1
|
|
10 1 1
|
|
11 1 1
|
|
12 1 1
|
|
13 1 1
|
|
14 1 1
|
|
15 1 1
|
|
16 1 1
|
|
EXPLAIN SELECT * FROM t2 WHERE b=1 AND c=1 ORDER BY c,a;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t2
|
|
type ref
|
|
possible_keys bkey
|
|
key bkey
|
|
key_len 10
|
|
ref const,const
|
|
rows 8
|
|
Extra Using where; Using index
|
|
SELECT * FROM t2 WHERE b=1 AND c=1 ORDER BY c,a;
|
|
a b c
|
|
1 1 1
|
|
2 1 1
|
|
3 1 1
|
|
4 1 1
|
|
5 1 1
|
|
6 1 1
|
|
7 1 1
|
|
8 1 1
|
|
9 1 1
|
|
10 1 1
|
|
11 1 1
|
|
12 1 1
|
|
13 1 1
|
|
14 1 1
|
|
15 1 1
|
|
16 1 1
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (a INT, PRIMARY KEY (a)) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES (1),(2),(3),(4),(5),(6),(7),(8);
|
|
INSERT INTO t1 SELECT a + 8 FROM t1;
|
|
INSERT INTO t1 SELECT a + 16 FROM t1;
|
|
CREATE PROCEDURE p1 ()
|
|
BEGIN
|
|
DECLARE i INT DEFAULT 50;
|
|
DECLARE cnt INT;
|
|
START TRANSACTION;
|
|
ALTER TABLE t1 ENGINE=InnoDB;
|
|
COMMIT;
|
|
START TRANSACTION;
|
|
WHILE (i > 0) DO
|
|
SET i = i - 1;
|
|
SELECT COUNT(*) INTO cnt FROM t1 LOCK IN SHARE MODE;
|
|
END WHILE;
|
|
COMMIT;
|
|
END;|
|
|
CALL p1();
|
|
CALL p1();
|
|
CALL p1();
|
|
DROP PROCEDURE p1;
|
|
DROP TABLE t1;
|
|
create table t1(a text) engine=innodb default charset=utf8;
|
|
insert into t1 values('aaa');
|
|
alter table t1 add index(a(1024));
|
|
Warnings:
|
|
Warning 1071 Specified key was too long; max key length is 767 bytes
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` text,
|
|
KEY `a` (`a`(255))
|
|
) ENGINE=InnoDB DEFAULT CHARSET=utf8
|
|
drop table t1;
|
|
CREATE TABLE t1 (
|
|
a INT,
|
|
b INT,
|
|
KEY (b)
|
|
) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES (1,10), (2,10), (2,20), (3,30);
|
|
START TRANSACTION;
|
|
SELECT * FROM t1 WHERE b=20 FOR UPDATE;
|
|
a b
|
|
2 20
|
|
START TRANSACTION;
|
|
SELECT * FROM t1 WHERE b=10 ORDER BY A FOR UPDATE;
|
|
a b
|
|
1 10
|
|
2 10
|
|
ROLLBACK;
|
|
ROLLBACK;
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1(
|
|
a INT,
|
|
b INT NOT NULL,
|
|
c INT NOT NULL,
|
|
d INT,
|
|
UNIQUE KEY (c,b)
|
|
) engine=innodb;
|
|
INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
|
|
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
|
|
SELECT c,b,d FROM t1 GROUP BY c,b,d;
|
|
c b d
|
|
1 1 50
|
|
3 1 4
|
|
3 2 40
|
|
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
|
SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
|
|
c b d
|
|
1 1 50
|
|
3 1 4
|
|
3 2 40
|
|
EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using filesort
|
|
SELECT c,b,d FROM t1 ORDER BY c,b,d;
|
|
c b d
|
|
1 1 50
|
|
3 1 4
|
|
3 2 40
|
|
EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 index NULL c 8 NULL 3
|
|
SELECT c,b,d FROM t1 GROUP BY c,b;
|
|
c b d
|
|
1 1 50
|
|
3 1 4
|
|
3 2 40
|
|
EXPLAIN SELECT c,b FROM t1 GROUP BY c,b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 index NULL c 8 NULL 3 Using index
|
|
SELECT c,b FROM t1 GROUP BY c,b;
|
|
c b
|
|
1 1
|
|
3 1
|
|
3 2
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a), INDEX b (b)) ENGINE=InnoDB;
|
|
INSERT INTO t1(a,b) VALUES (1,1), (2,2), (3,2);
|
|
EXPLAIN SELECT * FROM t1 WHERE b=2 ORDER BY a ASC;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type ref
|
|
possible_keys b
|
|
key b
|
|
key_len 5
|
|
ref const
|
|
rows 1
|
|
Extra Using where; Using index
|
|
SELECT * FROM t1 WHERE b=2 ORDER BY a ASC;
|
|
a b
|
|
2 2
|
|
3 2
|
|
EXPLAIN SELECT * FROM t1 WHERE b=2 ORDER BY a DESC;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type ref
|
|
possible_keys b
|
|
key b
|
|
key_len 5
|
|
ref const
|
|
rows 1
|
|
Extra Using where; Using index
|
|
SELECT * FROM t1 WHERE b=2 ORDER BY a DESC;
|
|
a b
|
|
3 2
|
|
2 2
|
|
EXPLAIN SELECT * FROM t1 ORDER BY b ASC, a ASC;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type index
|
|
possible_keys NULL
|
|
key b
|
|
key_len 5
|
|
ref NULL
|
|
rows 3
|
|
Extra Using index
|
|
SELECT * FROM t1 ORDER BY b ASC, a ASC;
|
|
a b
|
|
1 1
|
|
2 2
|
|
3 2
|
|
EXPLAIN SELECT * FROM t1 ORDER BY b DESC, a DESC;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type index
|
|
possible_keys NULL
|
|
key b
|
|
key_len 5
|
|
ref NULL
|
|
rows 3
|
|
Extra Using index
|
|
SELECT * FROM t1 ORDER BY b DESC, a DESC;
|
|
a b
|
|
3 2
|
|
2 2
|
|
1 1
|
|
EXPLAIN SELECT * FROM t1 ORDER BY b ASC, a DESC;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type index
|
|
possible_keys NULL
|
|
key b
|
|
key_len 5
|
|
ref NULL
|
|
rows 3
|
|
Extra Using index; Using filesort
|
|
SELECT * FROM t1 ORDER BY b ASC, a DESC;
|
|
a b
|
|
1 1
|
|
3 2
|
|
2 2
|
|
EXPLAIN SELECT * FROM t1 ORDER BY b DESC, a ASC;
|
|
id 1
|
|
select_type SIMPLE
|
|
table t1
|
|
type index
|
|
possible_keys NULL
|
|
key b
|
|
key_len 5
|
|
ref NULL
|
|
rows 3
|
|
Extra Using index; Using filesort
|
|
SELECT * FROM t1 ORDER BY b DESC, a ASC;
|
|
a b
|
|
2 2
|
|
3 2
|
|
1 1
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (id int, type char(6), d int, INDEX idx(id,d)) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES
|
|
(191, 'member', 1), (NULL, 'member', 3), (NULL, 'member', 4), (201, 'member', 2);
|
|
EXPLAIN SELECT * FROM t1 WHERE id=191 OR id IS NULL ORDER BY d;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL idx NULL NULL NULL 3 Using where; Using filesort
|
|
SELECT * FROM t1 WHERE id=191 OR id IS NULL ORDER BY d;
|
|
id type d
|
|
191 member 1
|
|
NULL member 3
|
|
NULL member 4
|
|
DROP TABLE t1;
|
|
create table t1(a char(10) not null, unique key aa(a(1)),
|
|
b char(4) not null, unique key bb(b(4))) engine=innodb;
|
|
desc t1;
|
|
Field Type Null Key Default Extra
|
|
a char(10) NO UNI NULL
|
|
b char(4) NO PRI NULL
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` char(10) NOT NULL,
|
|
`b` char(4) NOT NULL,
|
|
UNIQUE KEY `bb` (`b`),
|
|
UNIQUE KEY `aa` (`a`(1))
|
|
) ENGINE=InnoDB DEFAULT CHARSET=latin1
|
|
drop table t1;
|
|
set @my_innodb_autoextend_increment=@@global.innodb_autoextend_increment;
|
|
set global innodb_autoextend_increment=8;
|
|
set global innodb_autoextend_increment=@my_innodb_autoextend_increment;
|
|
set @my_innodb_commit_concurrency=@@global.innodb_commit_concurrency;
|
|
set global innodb_commit_concurrency=0;
|
|
set global innodb_commit_concurrency=@my_innodb_commit_concurrency;
|
|
CREATE TABLE t1 (a int, b int, c int, PRIMARY KEY (a), KEY t1_b (b))
|
|
ENGINE=InnoDB;
|
|
INSERT INTO t1 (a,b,c) VALUES (1,1,1), (2,1,1), (3,1,1), (4,1,1);
|
|
INSERT INTO t1 (a,b,c) SELECT a+4,b,c FROM t1;
|
|
EXPLAIN SELECT a, b, c FROM t1 WHERE b = 1 ORDER BY a DESC LIMIT 5;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range t1_b t1_b 5 NULL 4 Using where
|
|
SELECT a, b, c FROM t1 WHERE b = 1 ORDER BY a DESC LIMIT 5;
|
|
a b c
|
|
8 1 1
|
|
7 1 1
|
|
6 1 1
|
|
5 1 1
|
|
4 1 1
|
|
DROP TABLE t1;
|
|
DROP TABLE IF EXISTS t1;
|
|
CREATE TABLE t1 (a char(50)) ENGINE=InnoDB;
|
|
CREATE INDEX i1 on t1 (a(3));
|
|
SELECT * FROM t1 WHERE a = 'abcde';
|
|
a
|
|
DROP TABLE t1;
|
|
End of 5.0 tests
|