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977.2.1
by Stewart Smith
Add test for SELECT IN () with NULL producing bad query plan. See https://bugs.launchpad.net/drizzle/+bug/357560 and http://bugs.mysql.com/bug.php?id=44139 |
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drop table if exists foo;
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Warnings:
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Note 1051 Unknown table 'foo'
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1165.2.3
by Stewart Smith
use MyISAM for tests so results for EXPLAIN are deterministic |
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create temporary table foo (
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977.2.1
by Stewart Smith
Add test for SELECT IN () with NULL producing bad query plan. See https://bugs.launchpad.net/drizzle/+bug/357560 and http://bugs.mysql.com/bug.php?id=44139 |
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a int not null auto_increment,
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b int,
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primary key( a )
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1165.2.3
by Stewart Smith
use MyISAM for tests so results for EXPLAIN are deterministic |
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) engine=myisam;
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977.2.1
by Stewart Smith
Add test for SELECT IN () with NULL producing bad query plan. See https://bugs.launchpad.net/drizzle/+bug/357560 and http://bugs.mysql.com/bug.php?id=44139 |
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insert into foo( b ) values (1),(1),(1),(1),(1);
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1165.2.3
by Stewart Smith
use MyISAM for tests so results for EXPLAIN are deterministic |
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create table t2 as select * from foo;
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insert into foo( b ) select b from t2;
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drop table t2;
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create table t2 as select * from foo;
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insert into foo( b ) select b from t2;
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drop table t2;
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create table t2 as select * from foo;
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insert into foo( b ) select b from t2;
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drop table t2;
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create table t2 as select * from foo;
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insert into foo( b ) select b from t2;
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drop table t2;
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create table t2 as select * from foo;
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insert into foo( b ) select b from t2;
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drop table t2;
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977.2.1
by Stewart Smith
Add test for SELECT IN () with NULL producing bad query plan. See https://bugs.launchpad.net/drizzle/+bug/357560 and http://bugs.mysql.com/bug.php?id=44139 |
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explain select * from foo where a in (160000, 160001, 160002);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE foo range PRIMARY PRIMARY 4 NULL 3 Using where
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explain select * from foo where a in (null, 160000, 160001, 160002);
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id select_type table type possible_keys key key_len ref rows Extra
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1165.2.2
by gshchepa at mysql
MySQL Bug #44139: Table scan when NULL appears in IN clause |
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1 SIMPLE foo range PRIMARY PRIMARY 4 NULL 3 Using where
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DROP TABLE foo;
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