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merge
acinclude.m4: Auto merged mysql-test/r/subselect.result: Auto merged scripts/mysql_create_system_tables.sh: Auto merged sql/sql_class.h: Auto merged sql/sql_yacc.yy: Auto merged
This commit is contained in:
unknown
@ -111,11 +111,16 @@ insert into t1 set i = null;
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select last_insert_id();
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last_insert_id()
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255
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insert into t1 set i = 254;
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ERROR 23000: Duplicate entry '254' for key 1
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select last_insert_id();
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last_insert_id()
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255
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insert into t1 set i = null;
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ERROR 23000: Duplicate entry '255' for key 1
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select last_insert_id();
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last_insert_id()
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255
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0
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drop table t1;
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create table t1 (i tinyint unsigned not null auto_increment, key (i));
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insert into t1 set i = 254;
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@ -173,9 +173,9 @@ INSERT INTO t2 values (1),(2),(3);
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INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2');
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explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 index a a 5 NULL 6 Using index; Using temporary
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1 SIMPLE t2 index a a 4 NULL 5 Using index; Distinct
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1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using where; Distinct
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1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 2 Using temporary
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1 SIMPLE t2 ref a a 4 test.t1.a 2 Using index
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1 SIMPLE t3 ref a a 5 test.t1.b 2 Using where; Using index
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SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
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a
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1
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@ -1,4 +1,5 @@
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drop table if exists t1,t2,t3,t4,t5,t6;
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drop database if exists mysqltest;
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create table t1 (a int not null primary key auto_increment, message char(20));
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create table t2 (a int not null primary key auto_increment, message char(20));
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INSERT INTO t1 (message) VALUES ("Testing"),("table"),("t1");
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@ -174,15 +175,26 @@ t3 CREATE TABLE `t3` (
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`a` int(11) NOT NULL default '0',
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`b` char(20) default NULL,
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KEY `a` (`a`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(`t1`,`t2`)
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create table t4 (a int not null, b char(10), key(a)) type=MERGE UNION=(t1,t2);
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select * from t4;
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ERROR HY000: Can't open file: 't4.MRG'. (errno: 143)
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create table t5 (a int not null, b char(10), key(a)) type=MERGE UNION=(test.t1,test_2.t2);
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ERROR HY000: Incorrect table definition; All MERGE tables must be in the same database
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drop table if exists t5,t4,t3,t1,t2;
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Warnings:
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Note 1051 Unknown table 't5'
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alter table t4 add column c int;
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ERROR HY000: Can't open file: 't4.MRG'. (errno: 143)
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create database mysqltest;
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create table mysqltest.t6 (a int not null primary key auto_increment, message char(20));
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create table t5 (a int not null, b char(20), key(a)) type=MERGE UNION=(test.t1,mysqltest.t6);
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show create table t5;
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Table Create Table
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t5 CREATE TABLE `t5` (
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`a` int(11) NOT NULL default '0',
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`b` char(20) default NULL,
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KEY `a` (`a`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(`t1`,`mysqltest`.`t6`)
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alter table t5 type=myisam;
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drop table t5, mysqltest.t6;
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drop database mysqltest;
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drop table t4,t3,t1,t2;
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create table t1 (c char(10)) type=myisam;
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create table t2 (c char(10)) type=myisam;
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create table t3 (c char(10)) union=(t1,t2) type=merge;
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@ -251,14 +263,14 @@ t3 CREATE TABLE `t3` (
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`incr` int(11) NOT NULL default '0',
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`othr` int(11) NOT NULL default '0',
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PRIMARY KEY (`incr`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(`t1`,`t2`)
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alter table t3 drop primary key;
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show create table t3;
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Table Create Table
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t3 CREATE TABLE `t3` (
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`incr` int(11) NOT NULL default '0',
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`othr` int(11) NOT NULL default '0'
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(`t1`,`t2`)
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drop table t3,t2,t1;
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create table t1 (a int not null, key(a)) type=merge;
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select * from t1;
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@ -294,21 +306,21 @@ t4 CREATE TABLE `t4` (
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`a` int(11) NOT NULL default '0',
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`b` int(11) NOT NULL default '0',
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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(`t1`,`t2`)
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show create table t5;
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Table Create Table
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t5 CREATE TABLE `t5` (
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`a` int(11) NOT NULL default '0',
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`b` int(11) NOT NULL auto_increment,
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PRIMARY KEY (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(t1,t2)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(`t1`,`t2`)
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show create table t6;
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Table Create Table
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t6 CREATE TABLE `t6` (
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`a` int(11) NOT NULL default '0',
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`b` int(11) NOT NULL auto_increment,
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PRIMARY KEY (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=LAST UNION=(t1,t2)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=LAST UNION=(`t1`,`t2`)
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insert into t1 values (1,NULL),(1,NULL),(1,NULL),(1,NULL);
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insert into t2 values (2,NULL),(2,NULL),(2,NULL),(2,NULL);
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select * from t3 order by b,a limit 3;
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@ -373,7 +385,7 @@ t4 CREATE TABLE `t4` (
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`a` int(11) NOT NULL default '0',
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`b` int(11) NOT NULL default '0',
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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2,t3)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(`t1`,`t2`,`t3`)
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select * from t4 order by a,b;
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a b
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1 1
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@ -399,7 +411,7 @@ t4 CREATE TABLE `t4` (
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`a` int(11) NOT NULL default '0',
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`b` int(11) NOT NULL default '0',
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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(t1,t2,t3)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(`t1`,`t2`,`t3`)
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insert into t4 values (4,1),(4,2);
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select * from t1 order by a,b;
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a b
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@ -528,7 +540,11 @@ a b
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6 1
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6 2
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6 3
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drop table if exists t6, t5, t4, t3, t2, t1;
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insert into t1 values (99,NULL);
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select * from t4 where a+0 > 90;
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a b
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99 1
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drop table t6, t5, t4, t3, t2, t1;
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CREATE TABLE t1 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;
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INSERT INTO t1 VALUES (1,1), (2,1);
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CREATE TABLE t2 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;
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@ -540,7 +556,7 @@ max(b)
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select max(b) from t1 where a = 2;
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max(b)
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1
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drop table if exists t3,t1,t2;
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drop table t3,t1,t2;
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create table t1 (a int not null);
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create table t2 (a int not null);
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insert into t1 values (1);
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@ -559,7 +575,7 @@ select * from t6;
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a
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1
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2
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drop table if exists t6, t3, t1, t2, t4, t5;
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drop table t6, t3, t1, t2, t4, t5;
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CREATE TABLE t1 (
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fileset_id tinyint(3) unsigned NOT NULL default '0',
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file_code varchar(32) NOT NULL default '',
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@ -21,7 +21,10 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a,b a 9 NULL 3 Using where; Using index
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explain select * from t1 where (a is null or a = 7) and b=7;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref a,b b 4 const 2 Using where
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1 SIMPLE t1 ref_or_null a,b a 9 const,const 2 Using where; Using index
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explain select * from t1 where (a is null or a = 7) and b=7 order by 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 ref_or_null a,b a 9 const,const 2 Using where; Using index; Using filesort
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explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref a,b a 5 const 3 Using where; Using index
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@ -56,13 +59,15 @@ NULL 9
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NULL 9
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select * from t1 where (a is null or a = 7) and b=7;
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a b
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NULL 7
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7 7
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NULL 7
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select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
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a b
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NULL 7
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NULL 9
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NULL 9
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create table t2 like t1;
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insert into t2 select * from t1;
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alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
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explain select * from t1 where a is null and b = 2;
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id select_type table type possible_keys key key_len ref rows Extra
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@ -84,7 +89,7 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a,b a 5 NULL 5 Using where
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explain select * from t1 where (a is null or a = 7) and b=7 and c=0;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL a,b NULL NULL NULL 12 Using where
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1 SIMPLE t1 ref_or_null a,b a 5 const 4 Using where
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explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref a,b a 5 const 3 Using where
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@ -125,8 +130,8 @@ NULL 9 0
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NULL 9 0
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select * from t1 where (a is null or a = 7) and b=7 and c=0;
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a b c
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NULL 7 0
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7 7 0
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NULL 7 0
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select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
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a b c
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NULL 7 0
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@ -136,6 +141,103 @@ select * from t1 where b like "6%";
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a b c
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6 6 0
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drop table t1;
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rename table t2 to t1;
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alter table t1 modify b int null;
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insert into t1 values (7,null), (8,null), (8,7);
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explain select * from t1 where a = 7 and (b=7 or b is null);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref_or_null a,b a 10 const,const 2 Using where; Using index
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select * from t1 where a = 7 and (b=7 or b is null);
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a b
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7 7
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7 NULL
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explain select * from t1 where (a = 7 or a is null) and (b=7 or b is null);
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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 a,b a 10 NULL 4 Using where; Using index
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select * from t1 where (a = 7 or a is null) and (b=7 or b is null);
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a b
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NULL 7
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7 NULL
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7 7
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explain select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref_or_null a a 5 const 5 Using where; Using index
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select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
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a b
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7 NULL
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7 7
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NULL 7
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NULL 9
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NULL 9
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create table t2 (a int);
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insert into t2 values (7),(8);
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explain select * from t2 straight_join t1 where t1.a=t2.a and b is null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2
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1 SIMPLE t1 ref a,b a 10 test.t2.a,const 2 Using where; Using index
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drop index b on t1;
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explain select * from t2,t1 where t1.a=t2.a and b is null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2
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1 SIMPLE t1 ref a a 10 test.t2.a,const 2 Using where; Using index
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select * from t2,t1 where t1.a=t2.a and b is null;
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a a b
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7 7 NULL
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8 8 NULL
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explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2
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1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using where; Using index
|
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select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
|
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a a b
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7 7 7
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7 7 NULL
|
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8 8 7
|
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8 8 NULL
|
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explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
|
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id select_type table type possible_keys key key_len ref rows Extra
|
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using where; Using index
|
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select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
|
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a a b
|
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7 7 7
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7 NULL 7
|
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8 8 7
|
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8 NULL 7
|
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explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t1 ref_or_null a a 5 test.t2.a 4 Using where; Using index
|
||||
select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null);
|
||||
a a b
|
||||
7 7 NULL
|
||||
7 7 7
|
||||
7 NULL 7
|
||||
8 8 NULL
|
||||
8 8 7
|
||||
8 NULL 7
|
||||
insert into t2 values (null),(6);
|
||||
delete from t1 where a=8;
|
||||
explain select * from t2,t1 where t1.a=t2.a or t1.a is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 4
|
||||
1 SIMPLE t1 ref_or_null a a 5 test.t2.a 4 Using where; Using index
|
||||
explain select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 4
|
||||
1 SIMPLE t1 ref_or_null a a 5 test.t2.a 4 Using where; Using index
|
||||
select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
|
||||
a a b
|
||||
7 7 NULL
|
||||
7 7 7
|
||||
7 NULL 7
|
||||
8 NULL 7
|
||||
NULL NULL 7
|
||||
NULL NULL 9
|
||||
NULL NULL 9
|
||||
6 6 6
|
||||
6 NULL 7
|
||||
drop table t1,t2;
|
||||
CREATE TABLE t1 (
|
||||
id int(10) unsigned NOT NULL auto_increment,
|
||||
uniq_id int(10) unsigned default NULL,
|
||||
|
||||
@ -829,7 +829,7 @@ a t1.a in (select t2.a from t2)
|
||||
explain SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 Using index
|
||||
2 DEPENDENT SUBQUERY t2 index a a 5 NULL 3 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 const 2 Using where; Using index
|
||||
drop table t1,t2;
|
||||
create table t1 (a float);
|
||||
select 10.5 IN (SELECT * from t1 LIMIT 1);
|
||||
|
||||
@ -80,6 +80,9 @@ insert into t1 set i = 254;
|
||||
insert into t1 set i = null;
|
||||
select last_insert_id();
|
||||
--error 1062
|
||||
insert into t1 set i = 254;
|
||||
select last_insert_id();
|
||||
--error 1062
|
||||
insert into t1 set i = null;
|
||||
select last_insert_id();
|
||||
drop table t1;
|
||||
@ -100,5 +103,6 @@ select last_insert_id();
|
||||
--error 1062
|
||||
insert into t1 values (NULL, 10);
|
||||
select last_insert_id();
|
||||
|
||||
drop table t1;
|
||||
|
||||
|
||||
@ -22,7 +22,7 @@ drop table t1;
|
||||
|
||||
#
|
||||
# A bit bigger test
|
||||
# The 'replace_result' statements are needed because the cardinality calculated
|
||||
# The 'replace_column' statements are needed because the cardinality calculated
|
||||
# by innodb is not always the same between runs
|
||||
#
|
||||
|
||||
@ -51,7 +51,7 @@ select * from t1 where parent_id=102;
|
||||
select level,id from t1 where level=1;
|
||||
select level,id,parent_id from t1 where level=1;
|
||||
optimize table t1;
|
||||
--replace_result 87 # 50 # 48 # 43 # 25 # 24 # 6 # 3 #
|
||||
--replace_column 7 #
|
||||
show keys from t1;
|
||||
drop table t1;
|
||||
|
||||
|
||||
@ -4,6 +4,7 @@
|
||||
|
||||
--disable_warnings
|
||||
drop table if exists t1,t2,t3,t4,t5,t6;
|
||||
drop database if exists mysqltest;
|
||||
--enable_warnings
|
||||
|
||||
create table t1 (a int not null primary key auto_increment, message char(20));
|
||||
@ -48,13 +49,23 @@ show create table t3;
|
||||
create table t4 (a int not null, b char(10), key(a)) type=MERGE UNION=(t1,t2);
|
||||
--error 1016
|
||||
select * from t4;
|
||||
--error 1212
|
||||
create table t5 (a int not null, b char(10), key(a)) type=MERGE UNION=(test.t1,test_2.t2);
|
||||
--error 1016
|
||||
alter table t4 add column c int;
|
||||
|
||||
#
|
||||
# Test tables in different databases
|
||||
#
|
||||
create database mysqltest;
|
||||
create table mysqltest.t6 (a int not null primary key auto_increment, message char(20));
|
||||
create table t5 (a int not null, b char(20), key(a)) type=MERGE UNION=(test.t1,mysqltest.t6);
|
||||
show create table t5;
|
||||
alter table t5 type=myisam;
|
||||
drop table t5, mysqltest.t6;
|
||||
drop database mysqltest;
|
||||
|
||||
# Because of windows, it's important that we drop the merge tables first!
|
||||
# This should give a warning on table t5
|
||||
drop table if exists t5,t4,t3,t1,t2;
|
||||
|
||||
drop table t4,t3,t1,t2;
|
||||
|
||||
create table t1 (c char(10)) type=myisam;
|
||||
create table t2 (c char(10)) type=myisam;
|
||||
create table t3 (c char(10)) union=(t1,t2) type=merge;
|
||||
@ -177,7 +188,9 @@ select * from t1 order by a,b;
|
||||
select * from t2 order by a,b;
|
||||
select * from t5 order by a,b;
|
||||
select * from t6 order by a,b;
|
||||
drop table if exists t6, t5, t4, t3, t2, t1;
|
||||
insert into t1 values (99,NULL);
|
||||
select * from t4 where a+0 > 90;
|
||||
drop table t6, t5, t4, t3, t2, t1;
|
||||
|
||||
CREATE TABLE t1 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;
|
||||
INSERT INTO t1 VALUES (1,1), (2,1);
|
||||
@ -186,7 +199,7 @@ INSERT INTO t2 VALUES (1,2), (2,2);
|
||||
CREATE TABLE t3 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', KEY a (a,b)) TYPE=MRG_MyISAM UNION=(t1,t2);
|
||||
select max(b) from t3 where a = 2;
|
||||
select max(b) from t1 where a = 2;
|
||||
drop table if exists t3,t1,t2;
|
||||
drop table t3,t1,t2;
|
||||
|
||||
#
|
||||
# temporary merge tables
|
||||
@ -203,7 +216,7 @@ insert into t4 values (1);
|
||||
insert into t5 values (2);
|
||||
create temporary table t6 (a int not null) TYPE=MERGE UNION=(t4,t5);
|
||||
select * from t6;
|
||||
drop table if exists t6, t3, t1, t2, t4, t5;
|
||||
drop table t6, t3, t1, t2, t4, t5;
|
||||
|
||||
#
|
||||
# testing merge::records_in_range and optimizer
|
||||
|
||||
@ -14,6 +14,7 @@ explain select * from t1 where a=2 and b = 2;
|
||||
explain select * from t1 where a<=>b limit 2;
|
||||
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
|
||||
explain select * from t1 where (a is null or a = 7) and b=7;
|
||||
explain select * from t1 where (a is null or a = 7) and b=7 order by a;
|
||||
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
|
||||
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
||||
explain select * from t1 where a > 1 and a < 3 limit 1;
|
||||
@ -25,6 +26,8 @@ select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
|
||||
select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
|
||||
select * from t1 where (a is null or a = 7) and b=7;
|
||||
select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
||||
create table t2 like t1;
|
||||
insert into t2 select * from t1;
|
||||
alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
|
||||
explain select * from t1 where a is null and b = 2;
|
||||
explain select * from t1 where a is null and b = 2 and c=0;
|
||||
@ -47,8 +50,38 @@ select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
|
||||
select * from t1 where (a is null or a = 7) and b=7 and c=0;
|
||||
select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
||||
select * from t1 where b like "6%";
|
||||
drop table t1;
|
||||
|
||||
#
|
||||
# Test ref_or_null optimization
|
||||
#
|
||||
drop table t1;
|
||||
rename table t2 to t1;
|
||||
alter table t1 modify b int null;
|
||||
insert into t1 values (7,null), (8,null), (8,7);
|
||||
explain select * from t1 where a = 7 and (b=7 or b is null);
|
||||
select * from t1 where a = 7 and (b=7 or b is null);
|
||||
explain select * from t1 where (a = 7 or a is null) and (b=7 or b is null);
|
||||
select * from t1 where (a = 7 or a is null) and (b=7 or b is null);
|
||||
explain select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
|
||||
select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
|
||||
create table t2 (a int);
|
||||
insert into t2 values (7),(8);
|
||||
explain select * from t2 straight_join t1 where t1.a=t2.a and b is null;
|
||||
drop index b on t1;
|
||||
explain select * from t2,t1 where t1.a=t2.a and b is null;
|
||||
select * from t2,t1 where t1.a=t2.a and b is null;
|
||||
explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
|
||||
select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
|
||||
explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
|
||||
select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
|
||||
explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null);
|
||||
select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null);
|
||||
insert into t2 values (null),(6);
|
||||
delete from t1 where a=8;
|
||||
explain select * from t2,t1 where t1.a=t2.a or t1.a is null;
|
||||
explain select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
|
||||
select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
|
||||
drop table t1,t2;
|
||||
|
||||
#
|
||||
# The following failed for Matt Loschert
|
||||
|
||||
Reference in New Issue
Block a user