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Merge moonbone.local:/work/tmp_merge-5.0-mysql
into moonbone.local:/work/tmp_merge-5.1-opt-mysql
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@ -89,6 +89,27 @@ b a
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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 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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@ -303,6 +324,25 @@ explain select distinct f1, f2 from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range NULL PRIMARY 5 NULL 3 Using index for group-by; Using temporary
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drop table t1;
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CREATE TABLE t1 (id int(11) NOT NULL PRIMARY KEY, name varchar(20),
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INDEX (name)) ENGINE=InnoDB;
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CREATE TABLE t2 (id int(11) NOT NULL PRIMARY KEY, fkey int(11),
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FOREIGN KEY (fkey) REFERENCES t2(id)) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1,'A1'),(2,'A2'),(3,'B');
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INSERT INTO t2 VALUES (1,1),(2,2),(3,2),(4,3),(5,3);
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EXPLAIN
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SELECT COUNT(*) FROM t2 LEFT JOIN t1 ON t2.fkey = t1.id
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WHERE t1.name LIKE 'A%';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index PRIMARY,name name 23 NULL 3 Using where; Using index
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1 SIMPLE t2 ref fkey fkey 5 test.t1.id 1 Using where; Using index
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EXPLAIN
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SELECT COUNT(*) FROM t2 LEFT JOIN t1 ON t2.fkey = t1.id
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WHERE t1.name LIKE 'A%' OR FALSE;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL fkey 5 NULL 5 Using index
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1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.fkey 1 Using where
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DROP TABLE t1,t2;
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set storage_engine=innodb;
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CREATE TABLE t1 (a int, b int);
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insert into t1 values (1,1),(1,2);
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