mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 02:46:29 +01:00
2921 lines
102 KiB
Text
2921 lines
102 KiB
Text
set @@optimizer_switch='optimize_join_buffer_size=on';
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set @@optimizer_switch='semijoin_with_cache=on';
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set @@optimizer_switch='outer_join_with_cache=on';
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set @@optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
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set @@join_cache_level=6;
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set @optimizer_switch_for_join_outer_test=@@optimizer_switch;
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set @join_cache_level_for_join_outer_test=@@join_cache_level;
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drop table if exists t0,t1,t2,t3,t4,t5;
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drop view if exists v0,v1,v2,v3;
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SET @org_optimizer_switch=@@optimizer_switch;
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SET optimizer_switch=ifnull(@optimizer_switch_for_join_outer_test,'outer_join_with_cache=off');
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set join_cache_level=@join_cache_level_for_join_outer_test;
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CREATE TABLE t1 (
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grp int(11) default NULL,
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a bigint(20) unsigned default NULL,
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c char(10) NOT NULL default ''
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) ENGINE=MyISAM;
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INSERT INTO t1 VALUES (1,1,'a'),(2,2,'b'),(2,3,'c'),(3,4,'E'),(3,5,'C'),(3,6,'D'),(NULL,NULL,'');
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create table t2 (id int, a bigint unsigned not null, c char(10), d int, primary key (a));
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insert into t2 values (1,1,"a",1),(3,4,"A",4),(3,5,"B",5),(3,6,"C",6),(4,7,"D",7);
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select t1.*,t2.* from t1 JOIN t2 where t1.a=t2.a;
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grp a c id a c d
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1 1 a 1 1 a 1
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) order by t1.grp,t1.a,t2.c;
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grp a c id a c d
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NULL NULL NULL NULL NULL NULL
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1 1 a 1 1 a 1
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2 2 b NULL NULL NULL NULL
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2 3 c NULL NULL NULL NULL
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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select t1.*,t2.* from { oj t2 left outer join t1 on (t1.a=t2.a) };
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grp a c id a c d
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1 1 a 1 1 a 1
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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NULL NULL NULL 4 7 D 7
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select t1.*,t2.* from t1 as t0,{ oj t2 left outer join t1 on (t1.a=t2.a) } WHERE t0.a=2;
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grp a c id a c d
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1 1 a 1 1 a 1
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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NULL NULL NULL 4 7 D 7
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select t1.*,t2.* from t1 left join t2 using (a);
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grp a c id a c d
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1 1 a 1 1 a 1
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2 2 b NULL NULL NULL NULL
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2 3 c NULL NULL NULL NULL
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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NULL NULL NULL NULL NULL NULL
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select t1.*,t2.* from t1 left join t2 using (a) where t1.a=t2.a;
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grp a c id a c d
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1 1 a 1 1 a 1
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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select t1.*,t2.* from t1 left join t2 using (a,c);
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grp a c id a c d
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1 1 a 1 1 a 1
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2 2 b NULL NULL NULL NULL
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2 3 c NULL NULL NULL NULL
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3 4 E NULL NULL NULL NULL
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3 5 C NULL NULL NULL NULL
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3 6 D NULL NULL NULL NULL
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NULL NULL NULL NULL NULL NULL
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select t1.*,t2.* from t1 left join t2 using (c);
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grp a c id a c d
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1 1 a 1 1 a 1
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1 1 a 3 4 A 4
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2 2 b 3 5 B 5
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2 3 c 3 6 C 6
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3 4 E NULL NULL NULL NULL
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3 5 C 3 6 C 6
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3 6 D 4 7 D 7
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NULL NULL NULL NULL NULL NULL
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select t1.*,t2.* from t1 natural left outer join t2;
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grp a c id a c d
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1 1 a 1 1 a 1
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2 2 b NULL NULL NULL NULL
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2 3 c NULL NULL NULL NULL
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3 4 E NULL NULL NULL NULL
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3 5 C NULL NULL NULL NULL
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3 6 D NULL NULL NULL NULL
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NULL NULL NULL NULL NULL NULL
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select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id=3;
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grp a c id a c d
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id is null;
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grp a c id a c d
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2 2 b NULL NULL NULL NULL
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2 3 c NULL NULL NULL NULL
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NULL NULL NULL NULL NULL NULL
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explain select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1;
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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
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explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
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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 NULL NULL NULL NULL 7
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1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.a 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
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select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
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grp a c id a c d a
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1 1 a 1 1 a 1 1
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2 2 b NULL NULL NULL NULL NULL
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2 3 c NULL NULL NULL NULL NULL
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3 4 E 3 4 A 4 4
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3 5 C 3 5 B 5 5
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3 6 D 3 6 C 6 6
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NULL NULL NULL NULL NULL NULL NULL
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explain select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t1.a=t3.a);
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ERROR 42S22: Unknown column 't3.a' in 'ON'
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select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t1.a=t3.a);
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ERROR 42S22: Unknown column 't3.a' in 'ON'
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select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
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ERROR 42S22: Unknown column 't3.a' in 'ON'
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select t1.*,t2.* from t1 inner join t2 using (a);
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grp a c id a c d
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1 1 a 1 1 a 1
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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select t1.*,t2.* from t1 inner join t2 on (t1.a=t2.a);
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grp a c id a c d
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1 1 a 1 1 a 1
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3 4 E 3 4 A 4
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3 5 C 3 5 B 5
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3 6 D 3 6 C 6
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select t1.*,t2.* from t1 natural join t2;
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grp a c id a c d
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1 1 a 1 1 a 1
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drop table t1,t2;
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CREATE TABLE t1 (
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usr_id INT unsigned NOT NULL,
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uniq_id INT unsigned NOT NULL AUTO_INCREMENT,
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start_num INT unsigned NOT NULL DEFAULT 1,
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increment INT unsigned NOT NULL DEFAULT 1,
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PRIMARY KEY (uniq_id),
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INDEX usr_uniq_idx (usr_id, uniq_id),
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INDEX uniq_usr_idx (uniq_id, usr_id)
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);
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CREATE TABLE t2 (
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id INT unsigned NOT NULL DEFAULT 0,
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usr2_id INT unsigned NOT NULL DEFAULT 0,
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max INT unsigned NOT NULL DEFAULT 0,
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c_amount INT unsigned NOT NULL DEFAULT 0,
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d_max INT unsigned NOT NULL DEFAULT 0,
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d_num INT unsigned NOT NULL DEFAULT 0,
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orig_time INT unsigned NOT NULL DEFAULT 0,
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c_time INT unsigned NOT NULL DEFAULT 0,
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active ENUM ("no","yes") NOT NULL,
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PRIMARY KEY (id,usr2_id),
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INDEX id_idx (id),
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INDEX usr2_idx (usr2_id)
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);
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INSERT INTO t1 VALUES (3,NULL,0,50),(3,NULL,0,200),(3,NULL,0,25),(3,NULL,0,84676),(3,NULL,0,235),(3,NULL,0,10),(3,NULL,0,3098),(3,NULL,0,2947),(3,NULL,0,8987),(3,NULL,0,8347654),(3,NULL,0,20398),(3,NULL,0,8976),(3,NULL,0,500),(3,NULL,0,198);
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SELECT t1.usr_id,t1.uniq_id,t1.increment,
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t2.usr2_id,t2.c_amount,t2.max
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FROM t1
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LEFT JOIN t2 ON t2.id = t1.uniq_id
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WHERE t1.uniq_id = 4
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ORDER BY t2.c_amount;
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usr_id uniq_id increment usr2_id c_amount max
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3 4 84676 NULL NULL NULL
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SELECT t1.usr_id,t1.uniq_id,t1.increment,
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t2.usr2_id,t2.c_amount,t2.max
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FROM t2
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RIGHT JOIN t1 ON t2.id = t1.uniq_id
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WHERE t1.uniq_id = 4
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ORDER BY t2.c_amount;
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usr_id uniq_id increment usr2_id c_amount max
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3 4 84676 NULL NULL NULL
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INSERT INTO t2 VALUES (2,3,3000,6000,0,0,746584,837484,'yes');
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INSERT INTO t2 VALUES (2,3,3000,6000,0,0,746584,837484,'yes');
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ERROR 23000: Duplicate entry '2-3' for key 'PRIMARY'
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INSERT INTO t2 VALUES (7,3,1000,2000,0,0,746294,937484,'yes');
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SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 ORDER BY t2.c_amount;
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usr_id uniq_id increment usr2_id c_amount max
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3 4 84676 NULL NULL NULL
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SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 GROUP BY t2.c_amount;
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usr_id uniq_id increment usr2_id c_amount max
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3 4 84676 NULL NULL NULL
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SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4;
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usr_id uniq_id increment usr2_id c_amount max
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3 4 84676 NULL NULL NULL
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drop table t1,t2;
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CREATE TABLE t1 (
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cod_asig int(11) DEFAULT '0' NOT NULL,
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desc_larga_cat varchar(80) DEFAULT '' NOT NULL,
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desc_larga_cas varchar(80) DEFAULT '' NOT NULL,
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desc_corta_cat varchar(40) DEFAULT '' NOT NULL,
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desc_corta_cas varchar(40) DEFAULT '' NOT NULL,
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cred_total double(3,1) DEFAULT '0.0' NOT NULL,
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pre_requisit int(11),
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co_requisit int(11),
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preco_requisit int(11),
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PRIMARY KEY (cod_asig)
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);
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INSERT INTO t1 VALUES (10360,'asdfggfg','Introduccion a los Ordenadores I','asdfggfg','Introduccio Ordinadors I',6.0,NULL,NULL,NULL);
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INSERT INTO t1 VALUES (10361,'Components i Circuits Electronics I','Componentes y Circuitos Electronicos I','Components i Circuits Electronics I','Comp. i Circ. Electr. I',6.0,NULL,NULL,NULL);
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INSERT INTO t1 VALUES (10362,'Laboratori d`Ordinadors','Laboratorio de Ordenadores','Laboratori d`Ordinadors','Laboratori Ordinadors',4.5,NULL,NULL,NULL);
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INSERT INTO t1 VALUES (10363,'Tecniques de Comunicacio Oral i Escrita','Tecnicas de Comunicacion Oral y Escrita','Tecniques de Comunicacio Oral i Escrita','Tec. Com. Oral i Escrita',4.5,NULL,NULL,NULL);
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INSERT INTO t1 VALUES (11403,'Projecte Fi de Carrera','Proyecto Fin de Carrera','Projecte Fi de Carrera','PFC',9.0,NULL,NULL,NULL);
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INSERT INTO t1 VALUES (11404,'+lgebra lineal','Algebra lineal','+lgebra lineal','+lgebra lineal',15.0,NULL,NULL,NULL);
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INSERT INTO t1 VALUES (11405,'+lgebra lineal','Algebra lineal','+lgebra lineal','+lgebra lineal',18.0,NULL,NULL,NULL);
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INSERT INTO t1 VALUES (11406,'Calcul Infinitesimal','Cßlculo Infinitesimal','Calcul Infinitesimal','Calcul Infinitesimal',15.0,NULL,NULL,NULL);
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CREATE TABLE t2 (
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idAssignatura int(11) DEFAULT '0' NOT NULL,
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Grup int(11) DEFAULT '0' NOT NULL,
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Places smallint(6) DEFAULT '0' NOT NULL,
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PlacesOcupades int(11) DEFAULT '0',
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PRIMARY KEY (idAssignatura,Grup)
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);
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INSERT INTO t2 VALUES (10360,12,333,0);
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INSERT INTO t2 VALUES (10361,30,2,0);
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INSERT INTO t2 VALUES (10361,40,3,0);
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INSERT INTO t2 VALUES (10360,45,10,0);
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INSERT INTO t2 VALUES (10362,10,12,0);
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INSERT INTO t2 VALUES (10360,55,2,0);
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INSERT INTO t2 VALUES (10360,70,0,0);
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INSERT INTO t2 VALUES (10360,565656,0,0);
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INSERT INTO t2 VALUES (10360,32767,7,0);
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INSERT INTO t2 VALUES (10360,33,8,0);
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INSERT INTO t2 VALUES (10360,7887,85,0);
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INSERT INTO t2 VALUES (11405,88,8,0);
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INSERT INTO t2 VALUES (10360,0,55,0);
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INSERT INTO t2 VALUES (10360,99,0,0);
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INSERT INTO t2 VALUES (11411,30,10,0);
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INSERT INTO t2 VALUES (11404,0,0,0);
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INSERT INTO t2 VALUES (10362,11,111,0);
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INSERT INTO t2 VALUES (10363,33,333,0);
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INSERT INTO t2 VALUES (11412,55,0,0);
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INSERT INTO t2 VALUES (50003,66,6,0);
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INSERT INTO t2 VALUES (11403,5,0,0);
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INSERT INTO t2 VALUES (11406,11,11,0);
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INSERT INTO t2 VALUES (11410,11410,131,0);
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INSERT INTO t2 VALUES (11416,11416,32767,0);
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INSERT INTO t2 VALUES (11409,0,0,0);
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CREATE TABLE t3 (
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id int(11) NOT NULL auto_increment,
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dni_pasaporte char(16) DEFAULT '' NOT NULL,
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idPla int(11) DEFAULT '0' NOT NULL,
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cod_asig int(11) DEFAULT '0' NOT NULL,
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any smallint(6) DEFAULT '0' NOT NULL,
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quatrimestre smallint(6) DEFAULT '0' NOT NULL,
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estat char(1) DEFAULT 'M' NOT NULL,
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PRIMARY KEY (id),
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UNIQUE dni_pasaporte (dni_pasaporte,idPla),
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UNIQUE dni_pasaporte_2 (dni_pasaporte,idPla,cod_asig,any,quatrimestre)
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);
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INSERT INTO t3 VALUES (1,'11111111',1,10362,98,1,'M');
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CREATE TABLE t4 (
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id int(11) NOT NULL auto_increment,
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papa int(11) DEFAULT '0' NOT NULL,
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fill int(11) DEFAULT '0' NOT NULL,
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idPla int(11) DEFAULT '0' NOT NULL,
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PRIMARY KEY (id),
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KEY papa (idPla,papa),
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UNIQUE papa_2 (idPla,papa,fill)
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);
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INSERT INTO t4 VALUES (1,-1,10360,1);
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INSERT INTO t4 VALUES (2,-1,10361,1);
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INSERT INTO t4 VALUES (3,-1,10362,1);
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SELECT DISTINCT fill,desc_larga_cat,cred_total,Grup,Places,PlacesOcupades FROM t4 LEFT JOIN t3 ON t3.cod_asig=fill AND estat='S' AND dni_pasaporte='11111111' AND t3.idPla=1 , t2,t1 WHERE fill=t1.cod_asig AND Places>PlacesOcupades AND fill=idAssignatura AND t4.idPla=1 AND papa=-1;
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fill desc_larga_cat cred_total Grup Places PlacesOcupades
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10360 asdfggfg 6.0 0 55 0
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10360 asdfggfg 6.0 12 333 0
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10360 asdfggfg 6.0 32767 7 0
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10360 asdfggfg 6.0 33 8 0
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10360 asdfggfg 6.0 45 10 0
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10360 asdfggfg 6.0 55 2 0
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10360 asdfggfg 6.0 7887 85 0
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10361 Components i Circuits Electronics I 6.0 30 2 0
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10361 Components i Circuits Electronics I 6.0 40 3 0
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10362 Laboratori d`Ordinadors 4.5 10 12 0
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10362 Laboratori d`Ordinadors 4.5 11 111 0
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SELECT DISTINCT fill,t3.idPla FROM t4 LEFT JOIN t3 ON t3.cod_asig=t4.fill AND t3.estat='S' AND t3.dni_pasaporte='1234' AND t3.idPla=1 ;
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fill idPla
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10360 NULL
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10361 NULL
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10362 NULL
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INSERT INTO t3 VALUES (3,'1234',1,10360,98,1,'S');
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SELECT DISTINCT fill,t3.idPla FROM t4 LEFT JOIN t3 ON t3.cod_asig=t4.fill AND t3.estat='S' AND t3.dni_pasaporte='1234' AND t3.idPla=1 ;
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fill idPla
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10360 1
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10361 NULL
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|
10362 NULL
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drop table t1,t2,t3,test.t4;
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CREATE TABLE t1 (
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id smallint(5) unsigned NOT NULL auto_increment,
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name char(60) DEFAULT '' NOT NULL,
|
|
PRIMARY KEY (id)
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|
);
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INSERT INTO t1 VALUES (1,'Antonio Paz');
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INSERT INTO t1 VALUES (2,'Lilliana Angelovska');
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INSERT INTO t1 VALUES (3,'Thimble Smith');
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CREATE TABLE t2 (
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id smallint(5) unsigned NOT NULL auto_increment,
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|
owner smallint(5) unsigned DEFAULT '0' NOT NULL,
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|
name char(60),
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|
PRIMARY KEY (id)
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|
);
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INSERT INTO t2 VALUES (1,1,'El Gato');
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INSERT INTO t2 VALUES (2,1,'Perrito');
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INSERT INTO t2 VALUES (3,3,'Happy');
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select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner);
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name name id
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Antonio Paz El Gato 1
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Antonio Paz Perrito 2
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|
Lilliana Angelovska NULL NULL
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|
Thimble Smith Happy 3
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select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
|
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name name id
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|
Lilliana Angelovska NULL NULL
|
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explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id 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 ALL NULL NULL NULL NULL 3
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1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
|
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explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
|
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id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
|
|
select count(*) from t1 left join t2 on (t1.id = t2.owner);
|
|
count(*)
|
|
4
|
|
select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner);
|
|
name name id
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|
Antonio Paz El Gato 1
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|
Antonio Paz Perrito 2
|
|
Lilliana Angelovska NULL NULL
|
|
Thimble Smith Happy 3
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|
select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
|
|
name name id
|
|
Lilliana Angelovska NULL NULL
|
|
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
|
|
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
|
|
select count(*) from t2 right join t1 on (t1.id = t2.owner);
|
|
count(*)
|
|
4
|
|
select t1.name, t2.name, t2.id,t3.id from t2 right join t1 on (t1.id = t2.owner) left join t1 as t3 on t3.id=t2.owner;
|
|
name name id id
|
|
Antonio Paz El Gato 1 1
|
|
Antonio Paz Perrito 2 1
|
|
Lilliana Angelovska NULL NULL NULL
|
|
Thimble Smith Happy 3 3
|
|
select t1.name, t2.name, t2.id,t3.id from t1 right join t2 on (t1.id = t2.owner) right join t1 as t3 on t3.id=t2.owner;
|
|
name name id id
|
|
Antonio Paz El Gato 1 1
|
|
Antonio Paz Perrito 2 1
|
|
NULL NULL NULL 2
|
|
Thimble Smith Happy 3 3
|
|
select t1.name, t2.name, t2.id, t2.owner, t3.id from t1 left join t2 on (t1.id = t2.owner) right join t1 as t3 on t3.id=t2.owner;
|
|
name name id owner id
|
|
Antonio Paz El Gato 1 1 1
|
|
Antonio Paz Perrito 2 1 1
|
|
NULL NULL NULL NULL 2
|
|
Thimble Smith Happy 3 3 3
|
|
drop table t1,t2;
|
|
create table t1 (id int not null, str char(10), index(str));
|
|
insert into t1 values (1, null), (2, null), (3, "foo"), (4, "bar");
|
|
select * from t1 where str is not null order by id;
|
|
id str
|
|
3 foo
|
|
4 bar
|
|
select * from t1 where str is null;
|
|
id str
|
|
1 NULL
|
|
2 NULL
|
|
drop table t1;
|
|
CREATE TABLE t1 (
|
|
t1_id bigint(21) NOT NULL auto_increment,
|
|
PRIMARY KEY (t1_id)
|
|
);
|
|
CREATE TABLE t2 (
|
|
t2_id bigint(21) NOT NULL auto_increment,
|
|
PRIMARY KEY (t2_id)
|
|
);
|
|
CREATE TABLE t3 (
|
|
t3_id bigint(21) NOT NULL auto_increment,
|
|
PRIMARY KEY (t3_id)
|
|
);
|
|
CREATE TABLE t4 (
|
|
seq_0_id bigint(21) DEFAULT '0' NOT NULL,
|
|
seq_1_id bigint(21) DEFAULT '0' NOT NULL,
|
|
KEY seq_0_id (seq_0_id),
|
|
KEY seq_1_id (seq_1_id)
|
|
);
|
|
CREATE TABLE t5 (
|
|
seq_0_id bigint(21) DEFAULT '0' NOT NULL,
|
|
seq_1_id bigint(21) DEFAULT '0' NOT NULL,
|
|
KEY seq_1_id (seq_1_id),
|
|
KEY seq_0_id (seq_0_id)
|
|
);
|
|
insert into t1 values (1);
|
|
insert into t2 values (1);
|
|
insert into t3 values (1);
|
|
insert into t4 values (1,1);
|
|
insert into t5 values (1,1);
|
|
explain select * from t3 left join t4 on t4.seq_1_id = t2.t2_id left join t1 on t1.t1_id = t4.seq_0_id left join t5 on t5.seq_0_id = t1.t1_id left join t2 on t2.t2_id = t5.seq_1_id where t3.t3_id = 23;
|
|
ERROR 42S22: Unknown column 't2.t2_id' in 'ON'
|
|
drop table t1,t2,t3,t4,t5;
|
|
create table t1 (n int, m int, o int, key(n));
|
|
create table t2 (n int not null, m int, o int, primary key(n));
|
|
insert into t1 values (1, 2, 11), (1, 2, 7), (2, 2, 8), (1,2,9),(1,3,9);
|
|
insert into t2 values (1, 2, 3),(2, 2, 8), (4,3,9),(3,2,10);
|
|
select t1.*, t2.* from t1 left join t2 on t1.n = t2.n and
|
|
t1.m = t2.m where t1.n = 1;
|
|
n m o n m o
|
|
1 2 11 1 2 3
|
|
1 2 7 1 2 3
|
|
1 2 9 1 2 3
|
|
1 3 9 NULL NULL NULL
|
|
select t1.*, t2.* from t1 left join t2 on t1.n = t2.n and
|
|
t1.m = t2.m where t1.n = 1 order by t1.o;
|
|
n m o n m o
|
|
1 2 11 1 2 3
|
|
1 2 7 1 2 3
|
|
1 2 9 1 2 3
|
|
1 3 9 NULL NULL NULL
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 (id1 INT NOT NULL PRIMARY KEY, dat1 CHAR(1), id2 INT);
|
|
INSERT INTO t1 VALUES (1,'a',1);
|
|
INSERT INTO t1 VALUES (2,'b',1);
|
|
INSERT INTO t1 VALUES (3,'c',2);
|
|
CREATE TABLE t2 (id2 INT NOT NULL PRIMARY KEY, dat2 CHAR(1));
|
|
INSERT INTO t2 VALUES (1,'x');
|
|
INSERT INTO t2 VALUES (2,'y');
|
|
INSERT INTO t2 VALUES (3,'z');
|
|
SELECT t2.id2 FROM t2 LEFT OUTER JOIN t1 ON t1.id2 = t2.id2 WHERE id1 IS NULL;
|
|
id2
|
|
3
|
|
SELECT t2.id2 FROM t2 NATURAL LEFT OUTER JOIN t1 WHERE id1 IS NULL;
|
|
id2
|
|
3
|
|
drop table t1,t2;
|
|
create table t1 ( color varchar(20), name varchar(20) );
|
|
insert into t1 values ( 'red', 'apple' );
|
|
insert into t1 values ( 'yellow', 'banana' );
|
|
insert into t1 values ( 'green', 'lime' );
|
|
insert into t1 values ( 'black', 'grape' );
|
|
insert into t1 values ( 'blue', 'blueberry' );
|
|
create table t2 ( count int, color varchar(20) );
|
|
insert into t2 values (10, 'green');
|
|
insert into t2 values (5, 'black');
|
|
insert into t2 values (15, 'white');
|
|
insert into t2 values (7, 'green');
|
|
select * from t1;
|
|
color name
|
|
red apple
|
|
yellow banana
|
|
green lime
|
|
black grape
|
|
blue blueberry
|
|
select * from t2;
|
|
count color
|
|
10 green
|
|
5 black
|
|
15 white
|
|
7 green
|
|
select * from t2 natural join t1;
|
|
color count name
|
|
green 10 lime
|
|
green 7 lime
|
|
black 5 grape
|
|
select t2.count, t1.name from t2 natural join t1;
|
|
count name
|
|
10 lime
|
|
7 lime
|
|
5 grape
|
|
select t2.count, t1.name from t2 inner join t1 using (color);
|
|
count name
|
|
10 lime
|
|
7 lime
|
|
5 grape
|
|
drop table t1;
|
|
drop table t2;
|
|
CREATE TABLE t1 (
|
|
pcode varchar(8) DEFAULT '' NOT NULL
|
|
);
|
|
INSERT INTO t1 VALUES ('kvw2000'),('kvw2001'),('kvw3000'),('kvw3001'),('kvw3002'),('kvw3500'),('kvw3501'),('kvw3502'),('kvw3800'),('kvw3801'),('kvw3802'),('kvw3900'),('kvw3901'),('kvw3902'),('kvw4000'),('kvw4001'),('kvw4002'),('kvw4200'),('kvw4500'),('kvw5000'),('kvw5001'),('kvw5500'),('kvw5510'),('kvw5600'),('kvw5601'),('kvw6000'),('klw1000'),('klw1020'),('klw1500'),('klw2000'),('klw2001'),('klw2002'),('kld2000'),('klw2500'),('kmw1000'),('kmw1500'),('kmw2000'),('kmw2001'),('kmw2100'),('kmw3000'),('kmw3200');
|
|
CREATE TABLE t2 (
|
|
pcode varchar(8) DEFAULT '' NOT NULL,
|
|
KEY pcode (pcode)
|
|
);
|
|
INSERT INTO t2 VALUES ('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw6000'),('kvw6000'),('kld2000');
|
|
SELECT t1.pcode, IF(ISNULL(t2.pcode), 0, COUNT(*)) AS count FROM t1
|
|
LEFT JOIN t2 ON t1.pcode = t2.pcode GROUP BY t1.pcode;
|
|
pcode count
|
|
kld2000 1
|
|
klw1000 0
|
|
klw1020 0
|
|
klw1500 0
|
|
klw2000 0
|
|
klw2001 0
|
|
klw2002 0
|
|
klw2500 0
|
|
kmw1000 0
|
|
kmw1500 0
|
|
kmw2000 0
|
|
kmw2001 0
|
|
kmw2100 0
|
|
kmw3000 0
|
|
kmw3200 0
|
|
kvw2000 26
|
|
kvw2001 0
|
|
kvw3000 36
|
|
kvw3001 0
|
|
kvw3002 0
|
|
kvw3500 26
|
|
kvw3501 0
|
|
kvw3502 0
|
|
kvw3800 0
|
|
kvw3801 0
|
|
kvw3802 0
|
|
kvw3900 0
|
|
kvw3901 0
|
|
kvw3902 0
|
|
kvw4000 0
|
|
kvw4001 0
|
|
kvw4002 0
|
|
kvw4200 0
|
|
kvw4500 0
|
|
kvw5000 0
|
|
kvw5001 0
|
|
kvw5500 0
|
|
kvw5510 0
|
|
kvw5600 0
|
|
kvw5601 0
|
|
kvw6000 2
|
|
SELECT SQL_BIG_RESULT t1.pcode, IF(ISNULL(t2.pcode), 0, COUNT(*)) AS count FROM t1 LEFT JOIN t2 ON t1.pcode = t2.pcode GROUP BY t1.pcode;
|
|
pcode count
|
|
kld2000 1
|
|
klw1000 0
|
|
klw1020 0
|
|
klw1500 0
|
|
klw2000 0
|
|
klw2001 0
|
|
klw2002 0
|
|
klw2500 0
|
|
kmw1000 0
|
|
kmw1500 0
|
|
kmw2000 0
|
|
kmw2001 0
|
|
kmw2100 0
|
|
kmw3000 0
|
|
kmw3200 0
|
|
kvw2000 26
|
|
kvw2001 0
|
|
kvw3000 36
|
|
kvw3001 0
|
|
kvw3002 0
|
|
kvw3500 26
|
|
kvw3501 0
|
|
kvw3502 0
|
|
kvw3800 0
|
|
kvw3801 0
|
|
kvw3802 0
|
|
kvw3900 0
|
|
kvw3901 0
|
|
kvw3902 0
|
|
kvw4000 0
|
|
kvw4001 0
|
|
kvw4002 0
|
|
kvw4200 0
|
|
kvw4500 0
|
|
kvw5000 0
|
|
kvw5001 0
|
|
kvw5500 0
|
|
kvw5510 0
|
|
kvw5600 0
|
|
kvw5601 0
|
|
kvw6000 2
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 (
|
|
id int(11),
|
|
pid int(11),
|
|
rep_del tinyint(4),
|
|
KEY id (id),
|
|
KEY pid (pid)
|
|
);
|
|
INSERT INTO t1 VALUES (1,NULL,NULL);
|
|
INSERT INTO t1 VALUES (2,1,NULL);
|
|
select * from t1 LEFT JOIN t1 t2 ON (t1.id=t2.pid) AND t2.rep_del IS NULL;
|
|
id pid rep_del id pid rep_del
|
|
1 NULL NULL 2 1 NULL
|
|
2 1 NULL NULL NULL NULL
|
|
create index rep_del ON t1(rep_del);
|
|
select * from t1 LEFT JOIN t1 t2 ON (t1.id=t2.pid) AND t2.rep_del IS NULL;
|
|
id pid rep_del id pid rep_del
|
|
1 NULL NULL 2 1 NULL
|
|
2 1 NULL NULL NULL NULL
|
|
drop table t1;
|
|
CREATE TABLE t1 (
|
|
id int(11) DEFAULT '0' NOT NULL,
|
|
name tinytext DEFAULT '' NOT NULL,
|
|
UNIQUE id (id)
|
|
);
|
|
INSERT INTO t1 VALUES (1,'yes'),(2,'no');
|
|
CREATE TABLE t2 (
|
|
id int(11) DEFAULT '0' NOT NULL,
|
|
idx int(11) DEFAULT '0' NOT NULL,
|
|
UNIQUE id (id,idx)
|
|
);
|
|
INSERT INTO t2 VALUES (1,1);
|
|
explain SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
|
1 SIMPLE t2 ref id id 4 test.t1.id 1 Using where; Using index; Not exists
|
|
SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
|
|
id name id idx
|
|
2 no NULL NULL
|
|
drop table t1,t2;
|
|
create table t1 (bug_id mediumint, reporter mediumint);
|
|
create table t2 (bug_id mediumint, who mediumint, index(who));
|
|
insert into t2 values (1,1),(1,2);
|
|
insert into t1 values (1,1),(2,1);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON (t1.bug_id = t2.bug_id AND t2.who = 2) WHERE (t1.reporter = 2 OR t2.who = 2);
|
|
bug_id reporter bug_id who
|
|
1 1 1 2
|
|
drop table t1,t2;
|
|
create table t1 (fooID smallint unsigned auto_increment, primary key (fooID));
|
|
create table t2 (fooID smallint unsigned not null, barID smallint unsigned not null, primary key (fooID,barID));
|
|
insert into t1 (fooID) values (10),(20),(30);
|
|
insert into t2 values (10,1),(20,2),(30,3);
|
|
explain select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 index NULL PRIMARY 4 NULL 3 Using index
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 2 const 1 Using where; Using index
|
|
select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
|
|
fooID barID fooID
|
|
10 1 NULL
|
|
20 2 NULL
|
|
30 3 30
|
|
select * from t2 left join t1 ignore index(primary) on t1.fooID = t2.fooID and t1.fooID = 30;
|
|
fooID barID fooID
|
|
10 1 NULL
|
|
20 2 NULL
|
|
30 3 30
|
|
drop table t1,t2;
|
|
create table t1 (i int);
|
|
create table t2 (i int);
|
|
create table t3 (i int);
|
|
insert into t1 values(1),(2);
|
|
insert into t2 values(2),(3);
|
|
insert into t3 values(2),(4);
|
|
select * from t1 natural left join t2 natural left join t3;
|
|
i
|
|
1
|
|
2
|
|
select * from t1 natural left join t2 where (t2.i is not null)=0;
|
|
i
|
|
1
|
|
select * from t1 natural left join t2 where (t2.i is not null) is not null;
|
|
i
|
|
1
|
|
2
|
|
select * from t1 natural left join t2 where (i is not null)=0;
|
|
i
|
|
select * from t1 natural left join t2 where (i is not null) is not null;
|
|
i
|
|
1
|
|
2
|
|
drop table t1,t2,t3;
|
|
create table t1 (f1 integer,f2 integer,f3 integer);
|
|
create table t2 (f2 integer,f4 integer);
|
|
create table t3 (f3 integer,f5 integer);
|
|
select * from t1
|
|
left outer join t2 using (f2)
|
|
left outer join t3 using (f3);
|
|
f3 f2 f1 f4 f5
|
|
drop table t1,t2,t3;
|
|
create table t1 (a1 int, a2 int);
|
|
create table t2 (b1 int not null, b2 int);
|
|
create table t3 (c1 int, c2 int);
|
|
insert into t1 values (1,2), (2,2), (3,2);
|
|
insert into t2 values (1,3), (2,3);
|
|
insert into t3 values (2,4), (3,4);
|
|
select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null;
|
|
a1 a2 b1 b2 c1 c2
|
|
3 2 NULL NULL 3 4
|
|
1 2 1 3 NULL NULL
|
|
2 2 2 3 NULL NULL
|
|
explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 4 test.t1.a1 2 Using where; Using join buffer (flat, BNLH join)
|
|
1 SIMPLE t3 hash_ALL NULL #hash#$hj 5 test.t1.a1 2 Using where; Using join buffer (incremental, BNLH join)
|
|
drop table t1, t2, t3;
|
|
create table t1 (
|
|
a int(11),
|
|
b char(10),
|
|
key (a)
|
|
);
|
|
insert into t1 (a) values (1),(2),(3),(4);
|
|
create table t2 (a int);
|
|
select * from t1 left join t2 on t1.a=t2.a where not (t2.a <=> t1.a);
|
|
a b a
|
|
1 NULL NULL
|
|
2 NULL NULL
|
|
3 NULL NULL
|
|
4 NULL NULL
|
|
select * from t1 left join t2 on t1.a=t2.a having not (t2.a <=> t1.a);
|
|
a b a
|
|
1 NULL NULL
|
|
2 NULL NULL
|
|
3 NULL NULL
|
|
4 NULL NULL
|
|
drop table t1,t2;
|
|
create table t1 (
|
|
match_id tinyint(3) unsigned not null auto_increment,
|
|
home tinyint(3) unsigned default '0',
|
|
unique key match_id (match_id),
|
|
key match_id_2 (match_id)
|
|
);
|
|
insert into t1 values("1", "2");
|
|
create table t2 (
|
|
player_id tinyint(3) unsigned default '0',
|
|
match_1_h tinyint(3) unsigned default '0',
|
|
key player_id (player_id)
|
|
);
|
|
insert into t2 values("1", "5");
|
|
insert into t2 values("2", "9");
|
|
insert into t2 values("3", "3");
|
|
insert into t2 values("4", "7");
|
|
insert into t2 values("5", "6");
|
|
insert into t2 values("6", "8");
|
|
insert into t2 values("7", "4");
|
|
insert into t2 values("8", "12");
|
|
insert into t2 values("9", "11");
|
|
insert into t2 values("10", "10");
|
|
explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
|
(t2 s left join t1 m on m.match_id = 1)
|
|
order by m.match_id desc;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
|
|
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
|
(t2 s left join t1 m on m.match_id = 1)
|
|
order by UUX desc;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
|
|
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
|
(t2 s left join t1 m on m.match_id = 1)
|
|
order by UUX desc;
|
|
player_id match_1_h * match_id home UUX
|
|
8 12 * 1 2 10
|
|
9 11 * 1 2 9
|
|
10 10 * 1 2 8
|
|
2 9 * 1 2 7
|
|
6 8 * 1 2 6
|
|
4 7 * 1 2 5
|
|
5 6 * 1 2 4
|
|
1 5 * 1 2 3
|
|
7 4 * 1 2 2
|
|
3 3 * 1 2 1
|
|
explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
|
t2 s straight_join t1 m where m.match_id = 1
|
|
order by UUX desc;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
|
|
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
|
t2 s straight_join t1 m where m.match_id = 1
|
|
order by UUX desc;
|
|
player_id match_1_h * match_id home UUX
|
|
8 12 * 1 2 10
|
|
9 11 * 1 2 9
|
|
10 10 * 1 2 8
|
|
2 9 * 1 2 7
|
|
6 8 * 1 2 6
|
|
4 7 * 1 2 5
|
|
5 6 * 1 2 4
|
|
1 5 * 1 2 3
|
|
7 4 * 1 2 2
|
|
3 3 * 1 2 1
|
|
drop table t1, t2;
|
|
create table t1 (a int, b int, unique index idx (a, b));
|
|
create table t2 (a int, b int, c int, unique index idx (a, b));
|
|
insert into t1 values (1, 10), (1,11), (2,10), (2,11);
|
|
insert into t2 values (1,10,3);
|
|
select t1.a, t1.b, t2.c from t1 left join t2
|
|
on t1.a=t2.a and t1.b=t2.b and t2.c=3
|
|
where t1.a=1 and t2.c is null;
|
|
a b c
|
|
1 11 NULL
|
|
drop table t1, t2;
|
|
CREATE TABLE t1 (
|
|
ts_id bigint(20) default NULL,
|
|
inst_id tinyint(4) default NULL,
|
|
flag_name varchar(64) default NULL,
|
|
flag_value text,
|
|
UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
|
|
CREATE TABLE t2 (
|
|
ts_id bigint(20) default NULL,
|
|
inst_id tinyint(4) default NULL,
|
|
flag_name varchar(64) default NULL,
|
|
flag_value text,
|
|
UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
|
|
INSERT INTO t1 VALUES
|
|
(111056548820001, 0, 'flag1', NULL),
|
|
(111056548820001, 0, 'flag2', NULL),
|
|
(2, 0, 'other_flag', NULL);
|
|
INSERT INTO t2 VALUES
|
|
(111056548820001, 3, 'flag1', 'sss');
|
|
SELECT t1.flag_name,t2.flag_value
|
|
FROM t1 LEFT JOIN t2
|
|
ON (t1.ts_id = t2.ts_id AND t1.flag_name = t2.flag_name AND
|
|
t2.inst_id = 3)
|
|
WHERE t1.inst_id = 0 AND t1.ts_id=111056548820001 AND
|
|
t2.flag_value IS NULL;
|
|
flag_name flag_value
|
|
flag2 NULL
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (
|
|
id int(11) unsigned NOT NULL auto_increment,
|
|
text_id int(10) unsigned default NULL,
|
|
PRIMARY KEY (id)
|
|
);
|
|
INSERT INTO t1 VALUES("1", "0");
|
|
INSERT INTO t1 VALUES("2", "10");
|
|
CREATE TABLE t2 (
|
|
text_id char(3) NOT NULL default '',
|
|
language_id char(3) NOT NULL default '',
|
|
text_data text,
|
|
PRIMARY KEY (text_id,language_id)
|
|
);
|
|
INSERT INTO t2 VALUES("0", "EN", "0-EN");
|
|
INSERT INTO t2 VALUES("0", "SV", "0-SV");
|
|
INSERT INTO t2 VALUES("10", "EN", "10-EN");
|
|
INSERT INTO t2 VALUES("10", "SV", "10-SV");
|
|
SELECT t1.id, t1.text_id, t2.text_data
|
|
FROM t1 LEFT JOIN t2
|
|
ON t1.text_id = t2.text_id
|
|
AND t2.language_id = 'SV'
|
|
WHERE (t1.id LIKE '%' OR t2.text_data LIKE '%');
|
|
id text_id text_data
|
|
1 0 0-SV
|
|
2 10 10-SV
|
|
DROP TABLE t1, t2;
|
|
CREATE TABLE t0 (a0 int PRIMARY KEY);
|
|
CREATE TABLE t1 (a1 int PRIMARY KEY);
|
|
CREATE TABLE t2 (a2 int);
|
|
CREATE TABLE t3 (a3 int);
|
|
INSERT INTO t0 VALUES (1);
|
|
INSERT INTO t1 VALUES (1);
|
|
INSERT INTO t2 VALUES (1), (2);
|
|
INSERT INTO t3 VALUES (1), (2);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON a1=0;
|
|
a1 a2
|
|
1 NULL
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON a1=0;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
|
|
SELECT * FROM t1 LEFT JOIN (t2,t3) ON a1=0;
|
|
a1 a2 a3
|
|
1 NULL NULL
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN (t2,t3) ON a1=0;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
|
|
SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=0 WHERE a0=a1;
|
|
a0 a1 a2 a3
|
|
1 1 NULL NULL
|
|
EXPLAIN SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=0 WHERE a0=a1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 system PRIMARY NULL NULL NULL 1
|
|
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
|
|
INSERT INTO t0 VALUES (0);
|
|
INSERT INTO t1 VALUES (0);
|
|
SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=5 WHERE a0=a1 AND a0=1;
|
|
a0 a1 a2 a3
|
|
1 1 NULL NULL
|
|
EXPLAIN SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=5 WHERE a0=a1 AND a0=1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
|
|
drop table t1,t2;
|
|
create table t1 (a int, b int);
|
|
insert into t1 values (1,1),(2,2),(3,3);
|
|
create table t2 (a int, b int);
|
|
insert into t2 values (1,1), (2,2);
|
|
select * from t2 right join t1 on t2.a=t1.a;
|
|
a b a b
|
|
1 1 1 1
|
|
2 2 2 2
|
|
NULL NULL 3 3
|
|
select straight_join * from t2 right join t1 on t2.a=t1.a;
|
|
a b a b
|
|
1 1 1 1
|
|
2 2 2 2
|
|
NULL NULL 3 3
|
|
DROP TABLE t0,t1,t2,t3;
|
|
CREATE TABLE t1 (a int PRIMARY KEY, b int);
|
|
CREATE TABLE t2 (a int PRIMARY KEY, b int);
|
|
INSERT INTO t1 VALUES (1,1), (2,1), (3,1), (4,2);
|
|
INSERT INTO t2 VALUES (1,2), (2,2);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a;
|
|
a b a b
|
|
1 1 1 2
|
|
2 1 2 2
|
|
3 1 NULL NULL
|
|
4 2 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t1.b=1;
|
|
a b a b
|
|
1 1 1 2
|
|
2 1 2 2
|
|
3 1 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
|
|
WHERE t1.b=1 XOR (NOT ISNULL(t2.a) AND t2.b=1);
|
|
a b a b
|
|
1 1 1 2
|
|
2 1 2 2
|
|
3 1 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE not(0+(t1.a=30 and t2.b=1));
|
|
a b a b
|
|
1 1 1 2
|
|
2 1 2 2
|
|
3 1 NULL NULL
|
|
4 2 NULL NULL
|
|
DROP TABLE t1,t2;
|
|
set group_concat_max_len=5;
|
|
create table t1 (a int, b varchar(20));
|
|
create table t2 (a int, c varchar(20));
|
|
insert into t1 values (1,"aaaaaaaaaa"),(2,"bbbbbbbbbb");
|
|
insert into t2 values (1,"cccccccccc"),(2,"dddddddddd");
|
|
select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by t1.a;
|
|
group_concat(t1.b,t2.c)
|
|
aaaaa
|
|
bbbbb
|
|
Warnings:
|
|
Warning 1260 Row 1 was cut by GROUP_CONCAT()
|
|
Warning 1260 Row 2 was cut by GROUP_CONCAT()
|
|
select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by t1.a;
|
|
group_concat(t1.b,t2.c)
|
|
aaaaa
|
|
bbbbb
|
|
Warnings:
|
|
Warning 1260 Row 1 was cut by GROUP_CONCAT()
|
|
Warning 1260 Row 2 was cut by GROUP_CONCAT()
|
|
select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by a;
|
|
group_concat(t1.b,t2.c)
|
|
aaaaa
|
|
bbbbb
|
|
Warnings:
|
|
Warning 1260 Row 1 was cut by GROUP_CONCAT()
|
|
Warning 1260 Row 2 was cut by GROUP_CONCAT()
|
|
select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by a;
|
|
group_concat(t1.b,t2.c)
|
|
aaaaa
|
|
bbbbb
|
|
Warnings:
|
|
Warning 1260 Row 1 was cut by GROUP_CONCAT()
|
|
Warning 1260 Row 2 was cut by GROUP_CONCAT()
|
|
drop table t1, t2;
|
|
set group_concat_max_len=default;
|
|
create table t1 (gid smallint(5) unsigned not null, x int(11) not null, y int(11) not null, art int(11) not null, primary key (gid,x,y));
|
|
insert t1 values (1, -5, -8, 2), (1, 2, 2, 1), (1, 1, 1, 1);
|
|
create table t2 (gid smallint(5) unsigned not null, x int(11) not null, y int(11) not null, id int(11) not null, primary key (gid,id,x,y), key id (id));
|
|
insert t2 values (1, -5, -8, 1), (1, 1, 1, 1), (1, 2, 2, 1);
|
|
create table t3 ( set_id smallint(5) unsigned not null, id tinyint(4) unsigned not null, name char(12) not null, primary key (id,set_id));
|
|
insert t3 values (0, 1, 'a'), (1, 1, 'b'), (0, 2, 'c'), (1, 2, 'd'), (1, 3, 'e'), (1, 4, 'f'), (1, 5, 'g'), (1, 6, 'h');
|
|
explain select name from t1 left join t2 on t1.x = t2.x and t1.y = t2.y
|
|
left join t3 on t1.art = t3.id where t2.id =1 and t2.x = -5 and t2.y =-8
|
|
and t1.gid =1 and t2.gid =1 and t3.set_id =1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 10 const,const,const 1
|
|
1 SIMPLE t2 const PRIMARY,id PRIMARY 14 const,const,const,const 1 Using index
|
|
1 SIMPLE t3 const PRIMARY PRIMARY 3 const,const 1
|
|
drop tables t1,t2,t3;
|
|
CREATE TABLE t1 (EMPNUM INT, GRP INT);
|
|
INSERT INTO t1 VALUES (0, 10);
|
|
INSERT INTO t1 VALUES (2, 30);
|
|
CREATE TABLE t2 (EMPNUM INT, NAME CHAR(5));
|
|
INSERT INTO t2 VALUES (0, 'KERI');
|
|
INSERT INTO t2 VALUES (9, 'BARRY');
|
|
CREATE VIEW v1 AS
|
|
SELECT COALESCE(t2.EMPNUM,t1.EMPNUM) AS EMPNUM, NAME, GRP
|
|
FROM t2 LEFT OUTER JOIN t1 ON t2.EMPNUM=t1.EMPNUM;
|
|
SELECT * FROM v1;
|
|
EMPNUM NAME GRP
|
|
0 KERI 10
|
|
9 BARRY NULL
|
|
SELECT * FROM v1 WHERE EMPNUM < 10;
|
|
EMPNUM NAME GRP
|
|
0 KERI 10
|
|
9 BARRY NULL
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (c11 int);
|
|
CREATE TABLE t2 (c21 int);
|
|
INSERT INTO t1 VALUES (30), (40), (50);
|
|
INSERT INTO t2 VALUES (300), (400), (500);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON (c11=c21 AND c21=30) WHERE c11=40;
|
|
c11 c21
|
|
40 NULL
|
|
DROP TABLE t1, t2;
|
|
CREATE TABLE t1 (a int PRIMARY KEY, b int);
|
|
CREATE TABLE t2 (a int PRIMARY KEY, b int);
|
|
INSERT INTO t1 VALUES (1,2), (2,1), (3,2), (4,3), (5,6), (6,5), (7,8), (8,7), (9,10);
|
|
INSERT INTO t2 VALUES (3,0), (4,1), (6,4), (7,5);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.b <= t1.a AND t1.a <= t1.b;
|
|
a b a b
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a BETWEEN t2.b AND t1.b;
|
|
a b a b
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a NOT BETWEEN t2.b AND t1.b);
|
|
a b a b
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.b > t1.a OR t1.a > t1.b;
|
|
a b a b
|
|
2 1 NULL NULL
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
8 7 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a NOT BETWEEN t2.b AND t1.b;
|
|
a b a b
|
|
2 1 NULL NULL
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
8 7 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a BETWEEN t2.b AND t1.b);
|
|
a b a b
|
|
2 1 NULL NULL
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
8 7 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t2.b > t1.a OR t1.a > t1.b;
|
|
a b a b
|
|
2 1 NULL NULL
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
8 7 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a != t2.a AND t1.a BETWEEN t2.b AND t1.b);
|
|
a b a b
|
|
2 1 NULL NULL
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
8 7 NULL NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a AND (t2.b > t1.a OR t1.a > t1.b);
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a != t2.a OR t1.a BETWEEN t2.b AND t1.b);
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b;
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b);
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a NOT IN(t2.a, t2.b));
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a != t1.b AND t1.a != t2.b;
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a NOT IN(t1.b, t2.b);
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a IN(t1.b, t2.b));
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.a != t2.b OR (t1.a != t2.a AND t1.a != t2.b);
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t2.a = t2.b AND t1.a IN(t2.a, t2.b));
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.a != t2.b AND t1.a != t1.b AND t1.a != t2.b;
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t2.a = t2.b OR t1.a IN(t1.b, t2.b));
|
|
a b a b
|
|
3 2 3 0
|
|
4 3 4 1
|
|
6 5 6 4
|
|
7 8 7 5
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a > IF(t1.a = t2.b-2, t2.b, t2.b-1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
DROP TABLE t1,t2;
|
|
DROP VIEW IF EXISTS v1,v2;
|
|
DROP TABLE IF EXISTS t1,t2;
|
|
CREATE TABLE t1 (a int);
|
|
CREATE table t2 (b int);
|
|
INSERT INTO t1 VALUES (1), (2), (3), (4), (1), (1), (3);
|
|
INSERT INTO t2 VALUES (2), (3);
|
|
CREATE VIEW v1 AS SELECT a FROM t1 JOIN t2 ON t1.a=t2.b;
|
|
CREATE VIEW v2 AS SELECT b FROM t2 JOIN t1 ON t2.b=t1.a;
|
|
SELECT v1.a, v2. b
|
|
FROM v1 LEFT OUTER JOIN v2 ON (v1.a=v2.b) AND (v1.a >= 3)
|
|
GROUP BY v1.a;
|
|
a b
|
|
2 NULL
|
|
3 3
|
|
SELECT v1.a, v2. b
|
|
FROM { OJ v1 LEFT OUTER JOIN v2 ON (v1.a=v2.b) AND (v1.a >= 3) }
|
|
GROUP BY v1.a;
|
|
a b
|
|
2 NULL
|
|
3 3
|
|
DROP VIEW v1,v2;
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (a int);
|
|
CREATE TABLE t2 (b int);
|
|
INSERT INTO t1 VALUES (1), (2), (3), (4);
|
|
INSERT INTO t2 VALUES (2), (3);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1=1);
|
|
a b
|
|
1 NULL
|
|
2 2
|
|
3 3
|
|
4 NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1 OR 1);
|
|
a b
|
|
1 NULL
|
|
2 2
|
|
3 3
|
|
4 NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (0 OR 1);
|
|
a b
|
|
1 NULL
|
|
2 2
|
|
3 3
|
|
4 NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1=1 OR 2=2);
|
|
a b
|
|
1 NULL
|
|
2 2
|
|
3 3
|
|
4 NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1=1 OR 1=0);
|
|
a b
|
|
1 NULL
|
|
2 2
|
|
3 3
|
|
4 NULL
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (
|
|
f1 varchar(16) collate latin1_swedish_ci PRIMARY KEY,
|
|
f2 varchar(16) collate latin1_swedish_ci
|
|
);
|
|
CREATE TABLE t2 (
|
|
f1 varchar(16) collate latin1_swedish_ci PRIMARY KEY,
|
|
f3 varchar(16) collate latin1_swedish_ci
|
|
);
|
|
INSERT INTO t1 VALUES ('bla','blah');
|
|
INSERT INTO t2 VALUES ('bla','sheep');
|
|
SELECT * FROM t1 JOIN t2 USING(f1) WHERE f1='Bla';
|
|
f1 f2 f3
|
|
bla blah sheep
|
|
SELECT * FROM t1 LEFT JOIN t2 USING(f1) WHERE f1='bla';
|
|
f1 f2 f3
|
|
bla blah sheep
|
|
SELECT * FROM t1 LEFT JOIN t2 USING(f1) WHERE f1='Bla';
|
|
f1 f2 f3
|
|
bla blah sheep
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (id int PRIMARY KEY, a varchar(8));
|
|
CREATE TABLE t2 (id int NOT NULL, b int NOT NULL, INDEX idx(id));
|
|
INSERT INTO t1 VALUES
|
|
(1,'aaaaaaa'), (5,'eeeeeee'), (4,'ddddddd'), (2,'bbbbbbb'), (3,'ccccccc');
|
|
INSERT INTO t2 VALUES
|
|
(3,10), (2,20), (5,30), (3,20), (5,10), (3,40), (3,30), (2,10), (2,40);
|
|
EXPLAIN
|
|
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
|
1 SIMPLE t2 ref idx idx 4 test.t1.id 2 Using where; Not exists; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
flush status;
|
|
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
|
id a
|
|
1 aaaaaaa
|
|
4 ddddddd
|
|
show status like 'Handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 5
|
|
Handler_read_last 0
|
|
Handler_read_next 9
|
|
Handler_read_prev 0
|
|
Handler_read_retry 0
|
|
Handler_read_rnd 3
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 6
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (c int PRIMARY KEY, e int NOT NULL);
|
|
INSERT INTO t1 VALUES (1,0), (2,1);
|
|
CREATE TABLE t2 (d int PRIMARY KEY);
|
|
INSERT INTO t2 VALUES (1), (2), (3);
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON e<>0 WHERE c=1 AND d IS NULL;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
|
|
1 SIMPLE t2 index NULL PRIMARY 4 NULL 3 Using where; Using index; Not exists
|
|
SELECT * FROM t1 LEFT JOIN t2 ON e<>0 WHERE c=1 AND d IS NULL;
|
|
c e d
|
|
1 0 NULL
|
|
SELECT * FROM t1 LEFT JOIN t2 ON e<>0 WHERE c=1 AND d<=>NULL;
|
|
c e d
|
|
1 0 NULL
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug#47650: using group by with rollup without indexes returns incorrect
|
|
# results with where
|
|
#
|
|
CREATE TABLE t1 ( a INT );
|
|
INSERT INTO t1 VALUES (1);
|
|
CREATE TABLE t2 ( a INT, b INT );
|
|
INSERT INTO t2 VALUES (1, 1),(1, 2),(1, 3),(2, 4),(2, 5);
|
|
EXPLAIN
|
|
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
|
|
FROM t1 LEFT JOIN t2 USING( a )
|
|
GROUP BY t1.a WITH ROLLUP;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1 Using temporary; Using filesort
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using where
|
|
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
|
|
FROM t1 LEFT JOIN t2 USING( a )
|
|
GROUP BY t1.a WITH ROLLUP;
|
|
a COUNT( t2.b ) SUM( t2.b ) MAX( t2.b )
|
|
1 3 6 3
|
|
NULL 3 6 3
|
|
EXPLAIN
|
|
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
|
|
FROM t1 JOIN t2 USING( a )
|
|
GROUP BY t1.a WITH ROLLUP;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using where; Using filesort
|
|
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
|
|
FROM t1 JOIN t2 USING( a )
|
|
GROUP BY t1.a WITH ROLLUP;
|
|
a COUNT( t2.b ) SUM( t2.b ) MAX( t2.b )
|
|
1 3 6 3
|
|
NULL 3 6 3
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# Bug#51598 Inconsistent behaviour with a COALESCE statement inside an IN comparison
|
|
#
|
|
CREATE TABLE t1(f1 INT, f2 INT, f3 INT);
|
|
INSERT INTO t1 VALUES (1, NULL, 3);
|
|
CREATE TABLE t2(f1 INT, f2 INT);
|
|
INSERT INTO t2 VALUES (2, 1);
|
|
EXPLAIN EXTENDED SELECT * FROM t1 LEFT JOIN t2 ON t1.f2 = t2.f2
|
|
WHERE (COALESCE(t1.f1, t2.f1), f3) IN ((1, 3), (2, 2));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00
|
|
1 SIMPLE t2 system NULL NULL NULL NULL 1 100.00
|
|
Warnings:
|
|
Note 1003 select 1 AS `f1`,NULL AS `f2`,3 AS `f3`,NULL AS `f1`,NULL AS `f2` from `test`.`t2` where 1
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t1.f2 = t2.f2
|
|
WHERE (COALESCE(t1.f1, t2.f1), f3) IN ((1, 3), (2, 2));
|
|
f1 f2 f3 f1 f2
|
|
1 NULL 3 NULL NULL
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# Bug#52357: Assertion failed: join->best_read in greedy_search
|
|
# optimizer_search_depth=0
|
|
#
|
|
CREATE TABLE t1( a INT );
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
SET optimizer_search_depth = 0;
|
|
# Should not core dump on query preparation
|
|
EXPLAIN
|
|
SELECT 1
|
|
FROM t1 tt3 LEFT OUTER JOIN t1 tt4 ON 1
|
|
LEFT OUTER JOIN t1 tt5 ON 1
|
|
LEFT OUTER JOIN t1 tt6 ON 1
|
|
LEFT OUTER JOIN t1 tt7 ON 1
|
|
LEFT OUTER JOIN t1 tt8 ON 1
|
|
RIGHT OUTER JOIN t1 tt2 ON 1
|
|
RIGHT OUTER JOIN t1 tt1 ON 1
|
|
STRAIGHT_JOIN t1 tt9 ON 1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE tt1 ALL NULL NULL NULL NULL 2
|
|
1 SIMPLE tt2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
|
1 SIMPLE tt3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE tt4 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE tt5 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE tt6 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE tt7 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE tt8 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE tt9 ALL NULL NULL NULL NULL 2 Using join buffer (incremental, BNL join)
|
|
SET optimizer_search_depth = DEFAULT;
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug#46091 STRAIGHT_JOIN + RIGHT JOIN returns different result
|
|
#
|
|
CREATE TABLE t1 (f1 INT NOT NULL);
|
|
INSERT INTO t1 VALUES (9),(0);
|
|
CREATE TABLE t2 (f1 INT NOT NULL);
|
|
INSERT INTO t2 VALUES
|
|
(5),(3),(0),(3),(1),(0),(1),(7),(1),(0),(0),(8),(4),(9),(0),(2),(0),(8),(5),(1);
|
|
SELECT STRAIGHT_JOIN COUNT(*) FROM t1 TA1
|
|
RIGHT JOIN t2 TA2 JOIN t2 TA3 ON TA2.f1 ON TA3.f1;
|
|
COUNT(*)
|
|
476
|
|
EXPLAIN SELECT STRAIGHT_JOIN COUNT(*) FROM t1 TA1
|
|
RIGHT JOIN t2 TA2 JOIN t2 TA3 ON TA2.f1 ON TA3.f1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE TA2 ALL NULL NULL NULL NULL 20 Using where
|
|
1 SIMPLE TA3 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
|
1 SIMPLE TA1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# Bug#48971 Segfault in add_found_match_trig_cond () at sql_select.cc:5990
|
|
#
|
|
CREATE TABLE t1(f1 INT, PRIMARY KEY (f1));
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
EXPLAIN EXTENDED SELECT STRAIGHT_JOIN jt1.f1 FROM t1 AS jt1
|
|
LEFT JOIN t1 AS jt2
|
|
RIGHT JOIN t1 AS jt3
|
|
JOIN t1 AS jt4 ON 1
|
|
LEFT JOIN t1 AS jt5 ON 1
|
|
ON 1
|
|
RIGHT JOIN t1 AS jt6 ON jt6.f1
|
|
ON 1;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE jt1 index NULL PRIMARY 4 NULL 2 100.00 Using index
|
|
1 SIMPLE jt6 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
|
1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join)
|
|
Warnings:
|
|
Note 1003 select straight_join `test`.`jt1`.`f1` AS `f1` from `test`.`t1` `jt1` left join (`test`.`t1` `jt6` left join (`test`.`t1` `jt3` join `test`.`t1` `jt4` left join `test`.`t1` `jt5` on(1) left join `test`.`t1` `jt2` on(1)) on(`test`.`jt6`.`f1` <> 0 and 1)) on(1) where 1
|
|
EXPLAIN EXTENDED SELECT STRAIGHT_JOIN jt1.f1 FROM t1 AS jt1
|
|
RIGHT JOIN t1 AS jt2
|
|
RIGHT JOIN t1 AS jt3
|
|
JOIN t1 AS jt4 ON 1
|
|
LEFT JOIN t1 AS jt5 ON 1
|
|
ON 1
|
|
RIGHT JOIN t1 AS jt6 ON jt6.f1
|
|
ON 1;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE jt6 index NULL PRIMARY 4 NULL 2 100.00 Using index
|
|
1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
|
1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE jt1 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join)
|
|
Warnings:
|
|
Note 1003 select straight_join `test`.`jt1`.`f1` AS `f1` from `test`.`t1` `jt6` left join (`test`.`t1` `jt3` join `test`.`t1` `jt4` left join `test`.`t1` `jt5` on(1) left join `test`.`t1` `jt2` on(1)) on(`test`.`jt6`.`f1` <> 0 and 1) left join `test`.`t1` `jt1` on(1) where 1
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug#57688 Assertion `!table || (!table->write_set || bitmap_is_set(table->write_set, field
|
|
#
|
|
CREATE TABLE t1 (f1 INT NOT NULL, PRIMARY KEY (f1));
|
|
CREATE TABLE t2 (f1 INT NOT NULL, f2 INT NOT NULL, PRIMARY KEY (f1, f2));
|
|
INSERT INTO t1 VALUES (4);
|
|
INSERT INTO t2 VALUES (3, 3);
|
|
INSERT INTO t2 VALUES (7, 7);
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4
|
|
GROUP BY t2.f1, t2.f2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1 Using temporary; Using filesort
|
|
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using index
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4
|
|
GROUP BY t2.f1, t2.f2;
|
|
f1 f1 f2
|
|
4 NULL NULL
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
|
|
GROUP BY t2.f1, t2.f2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1
|
|
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using where; Using index; Using filesort
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
|
|
GROUP BY t2.f1, t2.f2;
|
|
f1 f1 f2
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug#57034 incorrect OUTER JOIN result when joined on unique key
|
|
#
|
|
CREATE TABLE t1 (pk INT PRIMARY KEY,
|
|
col_int INT,
|
|
col_int_unique INT UNIQUE KEY);
|
|
INSERT INTO t1 VALUES (1,NULL,2), (2,0,0);
|
|
CREATE TABLE t2 (pk INT PRIMARY KEY,
|
|
col_int INT,
|
|
col_int_unique INT UNIQUE KEY);
|
|
INSERT INTO t2 VALUES (1,0,1), (2,0,2);
|
|
EXPLAIN
|
|
SELECT * FROM t1 LEFT JOIN t2
|
|
ON t1.col_int_unique = t2.col_int_unique AND t1.col_int = t2.col_int
|
|
WHERE t1.pk=1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
|
|
1 SIMPLE t2 const col_int_unique col_int_unique 5 const 1
|
|
SELECT * FROM t1 LEFT JOIN t2
|
|
ON t1.col_int_unique = t2.col_int_unique AND t1.col_int = t2.col_int
|
|
WHERE t1.pk=1;
|
|
pk col_int col_int_unique pk col_int col_int_unique
|
|
1 NULL 2 NULL NULL NULL
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug#48046 Server incorrectly processing JOINs on NULL values
|
|
#
|
|
CREATE TABLE `BB` (
|
|
`pk` int(11) NOT NULL AUTO_INCREMENT,
|
|
`time_key` time DEFAULT NULL,
|
|
`varchar_key` varchar(1) DEFAULT NULL,
|
|
`varchar_nokey` varchar(1) DEFAULT NULL,
|
|
PRIMARY KEY (`pk`),
|
|
KEY `time_key` (`time_key`),
|
|
KEY `varchar_key` (`varchar_key`)
|
|
) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1;
|
|
INSERT INTO `BB` VALUES (10,'18:27:58',NULL,NULL);
|
|
SELECT table1.time_key AS field1, table2.pk
|
|
FROM BB table1 LEFT JOIN BB table2
|
|
ON table2.varchar_nokey = table1.varchar_key
|
|
HAVING field1;
|
|
field1 pk
|
|
18:27:58 NULL
|
|
DROP TABLE BB;
|
|
#
|
|
# Bug#49600 Server incorrectly processing RIGHT JOIN with
|
|
# constant WHERE clause and no index
|
|
#
|
|
CREATE TABLE `BB` (
|
|
`col_datetime_key` datetime DEFAULT NULL,
|
|
`col_varchar_key` varchar(1) DEFAULT NULL,
|
|
`col_varchar_nokey` varchar(1) DEFAULT NULL,
|
|
KEY `col_datetime_key` (`col_datetime_key`),
|
|
KEY `col_varchar_key` (`col_varchar_key`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
|
|
INSERT INTO `BB` VALUES ('1900-01-01 00:00:00',NULL,NULL);
|
|
SELECT table1.col_datetime_key
|
|
FROM BB table1 RIGHT JOIN BB table2
|
|
ON table2 .col_varchar_nokey = table1.col_varchar_key
|
|
WHERE 7;
|
|
col_datetime_key
|
|
NULL
|
|
ALTER TABLE BB DISABLE KEYS;
|
|
SELECT table1.col_datetime_key
|
|
FROM BB table1 RIGHT JOIN BB table2
|
|
ON table2 .col_varchar_nokey = table1.col_varchar_key
|
|
WHERE 7;
|
|
col_datetime_key
|
|
NULL
|
|
DROP TABLE BB;
|
|
#
|
|
# Bug#58490: Incorrect result in multi level OUTER JOIN
|
|
# in combination with IS NULL
|
|
#
|
|
CREATE TABLE t1 (i INT NOT NULL);
|
|
INSERT INTO t1 VALUES (0), (2),(3),(4);
|
|
CREATE TABLE t2 (i INT NOT NULL);
|
|
INSERT INTO t2 VALUES (0),(1), (3),(4);
|
|
CREATE TABLE t3 (i INT NOT NULL);
|
|
INSERT INTO t3 VALUES (0),(1),(2), (4);
|
|
CREATE TABLE t4 (i INT NOT NULL);
|
|
INSERT INTO t4 VALUES (0),(1),(2),(3) ;
|
|
SELECT * FROM
|
|
t1 LEFT JOIN
|
|
( t2 LEFT JOIN
|
|
( t3 LEFT JOIN
|
|
t4
|
|
ON t4.i = t3.i
|
|
)
|
|
ON t3.i = t2.i
|
|
)
|
|
ON t2.i = t1.i
|
|
;
|
|
i i i i
|
|
0 0 0 0
|
|
2 NULL NULL NULL
|
|
3 3 NULL NULL
|
|
4 4 4 NULL
|
|
SELECT * FROM
|
|
t1 LEFT JOIN
|
|
( t2 LEFT JOIN
|
|
( t3 LEFT JOIN
|
|
t4
|
|
ON t4.i = t3.i
|
|
)
|
|
ON t3.i = t2.i
|
|
)
|
|
ON t2.i = t1.i
|
|
WHERE t4.i IS NULL;
|
|
i i i i
|
|
2 NULL NULL NULL
|
|
3 3 NULL NULL
|
|
4 4 4 NULL
|
|
SELECT * FROM
|
|
t1 LEFT JOIN
|
|
( ( t2 LEFT JOIN
|
|
t3
|
|
ON t3.i = t2.i
|
|
)
|
|
)
|
|
ON t2.i = t1.i
|
|
WHERE t3.i IS NULL;
|
|
i i i
|
|
2 NULL NULL
|
|
3 3 NULL
|
|
SELECT * FROM
|
|
t1 LEFT JOIN
|
|
( ( t2 LEFT JOIN
|
|
t3
|
|
ON t3.i = t2.i
|
|
)
|
|
JOIN t4
|
|
ON t4.i=t2.i
|
|
)
|
|
ON t2.i = t1.i
|
|
WHERE t3.i IS NULL;
|
|
i i i i
|
|
2 NULL NULL NULL
|
|
3 3 NULL 3
|
|
4 NULL NULL NULL
|
|
SELECT * FROM
|
|
t1 LEFT JOIN
|
|
( ( t2 LEFT JOIN
|
|
t3
|
|
ON t3.i = t2.i
|
|
)
|
|
JOIN (t4 AS t4a JOIN t4 AS t4b ON t4a.i=t4b.i)
|
|
ON t4a.i=t2.i
|
|
)
|
|
ON t2.i = t1.i
|
|
WHERE t3.i IS NULL;
|
|
i i i i i
|
|
2 NULL NULL NULL NULL
|
|
3 3 NULL 3 3
|
|
4 NULL NULL NULL NULL
|
|
SELECT * FROM
|
|
t1 LEFT JOIN
|
|
( ( t2 LEFT JOIN
|
|
t3
|
|
ON t3.i = t2.i
|
|
)
|
|
JOIN (t4 AS t4a, t4 AS t4b)
|
|
ON t4a.i=t2.i
|
|
)
|
|
ON t2.i = t1.i
|
|
WHERE t3.i IS NULL;
|
|
i i i i i
|
|
2 NULL NULL NULL NULL
|
|
3 3 NULL 3 0
|
|
3 3 NULL 3 1
|
|
3 3 NULL 3 2
|
|
3 3 NULL 3 3
|
|
4 NULL NULL NULL NULL
|
|
DROP TABLE t1,t2,t3,t4;
|
|
#
|
|
# Bug#49322(Duplicate): Server is adding extra NULL row
|
|
# on processing a WHERE clause
|
|
#
|
|
CREATE TABLE h (pk INT NOT NULL, col_int_key INT);
|
|
INSERT INTO h VALUES (1,NULL),(4,2),(5,2),(3,4),(2,8);
|
|
CREATE TABLE m (pk INT NOT NULL, col_int_key INT);
|
|
INSERT INTO m VALUES (1,2),(2,7),(3,5),(4,7),(5,5),(6,NULL),(7,NULL),(8,9);
|
|
CREATE TABLE k (pk INT NOT NULL, col_int_key INT);
|
|
INSERT INTO k VALUES (1,9),(2,2),(3,5),(4,2),(5,7),(6,0),(7,5);
|
|
SELECT TABLE1.pk FROM k TABLE1
|
|
RIGHT JOIN h TABLE2 ON TABLE1.col_int_key=TABLE2.col_int_key
|
|
RIGHT JOIN m TABLE4 ON TABLE2.col_int_key=TABLE4.col_int_key;
|
|
pk
|
|
2
|
|
2
|
|
4
|
|
4
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
SELECT TABLE1.pk FROM k TABLE1
|
|
RIGHT JOIN h TABLE2 ON TABLE1.col_int_key=TABLE2.col_int_key
|
|
RIGHT JOIN m TABLE4 ON TABLE2.col_int_key=TABLE4.col_int_key
|
|
WHERE TABLE1.pk IS NULL;
|
|
pk
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
NULL
|
|
DROP TABLE h,m,k;
|
|
|
|
# BUG#12567331 - INFINITE LOOP WHEN RESOLVING AN ALIASED COLUMN
|
|
# USED IN GROUP BY
|
|
|
|
CREATE TABLE t1 (
|
|
col_varchar_1024_latin1_key varchar(1024),
|
|
col_varchar_10_latin1 varchar(10),
|
|
col_int int(11),
|
|
pk int(11)
|
|
);
|
|
CREATE TABLE t2 (
|
|
col_int_key int(11),
|
|
col_int int(11),
|
|
pk int(11)
|
|
);
|
|
PREPARE prep_stmt_9846 FROM '
|
|
SELECT alias1.pk AS field1 FROM
|
|
t1 AS alias1
|
|
LEFT JOIN
|
|
(
|
|
t2 AS alias2
|
|
RIGHT JOIN
|
|
(
|
|
t2 AS alias3
|
|
JOIN t1 AS alias4
|
|
ON 1
|
|
)
|
|
ON 1
|
|
)
|
|
ON 1
|
|
GROUP BY field1';
|
|
execute prep_stmt_9846;
|
|
field1
|
|
execute prep_stmt_9846;
|
|
field1
|
|
drop table t1,t2;
|
|
#
|
|
# Bug #11765810 58813: SERVER THREAD HANGS WHEN JOIN + WHERE + GROUP BY
|
|
# IS EXECUTED TWICE FROM P
|
|
#
|
|
CREATE TABLE t1 ( a INT ) ENGINE = MYISAM;
|
|
INSERT INTO t1 VALUES (1);
|
|
PREPARE prep_stmt FROM '
|
|
SELECT 1 AS f FROM t1
|
|
LEFT JOIN t1 t2
|
|
RIGHT JOIN t1 t3
|
|
JOIN t1 t4
|
|
ON 1
|
|
ON 1
|
|
ON 1
|
|
GROUP BY f';
|
|
EXECUTE prep_stmt;
|
|
f
|
|
1
|
|
EXECUTE prep_stmt;
|
|
f
|
|
1
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug#49600: outer join of two single-row tables with joining attributes
|
|
# evaluated to nulls
|
|
create table t1 (a int, b int);
|
|
create table t2 (a int, b int);
|
|
insert into t1 values (1, NULL);
|
|
insert into t2 values (2, NULL);
|
|
select * from t1 left join t2 on t1.b=t2.b;
|
|
a b a b
|
|
1 NULL NULL NULL
|
|
select * from t1 left join t2 on t1.b=t2.b where 1=1;
|
|
a b a b
|
|
1 NULL NULL NULL
|
|
drop table t1,t2;
|
|
#
|
|
# Bug#53161: outer join in the derived table is erroneously converted
|
|
# into an inner join for a query with a group by clause
|
|
#
|
|
create table t1 (pk int not null primary key, a int not null);
|
|
create table t2 like t1;
|
|
create table t3 like t1;
|
|
create table t4 (pk int not null primary key);
|
|
insert into t1 values (1000, 1), (1001, 1);
|
|
insert into t2 values (2000, 2), (2001, 2);
|
|
insert into t3 values (3000, 3), (3001, 2);
|
|
insert into t4 values (4000), (4001);
|
|
explain extended
|
|
select t2.pk,
|
|
(select t3.pk+if(isnull(t4.pk),0,t4.pk)
|
|
from t3 left join t4 on t4.pk=t3.pk
|
|
where t3.pk=t2.pk+1000 limit 1 ) as t
|
|
from t1,t2
|
|
where t2.pk=t1.pk+1000 and t1.pk>1000
|
|
group by t2.pk;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 range PRIMARY PRIMARY 4 NULL 1 100.00 Using where; Using index; Using temporary; Using filesort
|
|
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 func 1 100.00 Using where; Using index
|
|
2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 100.00 Using where; Using index
|
|
2 DEPENDENT SUBQUERY t4 eq_ref PRIMARY PRIMARY 4 test.t3.pk 1 100.00 Using index
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t2.pk' of SELECT #2 was resolved in SELECT #1
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`pk` AS `pk`,<expr_cache><`test`.`t2`.`pk`>((/* select#2 */ select `test`.`t3`.`pk` + if(`test`.`t4`.`pk` is null,0,`test`.`t4`.`pk`) from `test`.`t3` left join `test`.`t4` on(`test`.`t4`.`pk` = `test`.`t3`.`pk`) where `test`.`t3`.`pk` = `test`.`t2`.`pk` + 1000 limit 1)) AS `t` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`pk` = `test`.`t1`.`pk` + 1000 and `test`.`t1`.`pk` > 1000 group by `test`.`t2`.`pk`
|
|
select t2.pk,
|
|
(select t3.pk+if(isnull(t4.pk),0,t4.pk)
|
|
from t3 left join t4 on t4.pk=t3.pk
|
|
where t3.pk=t2.pk+1000 limit 1 ) as t
|
|
from t1,t2
|
|
where t2.pk=t1.pk+1000 and t1.pk>1000
|
|
group by t2.pk;
|
|
pk t
|
|
2001 3001
|
|
drop table t1,t2,t3,t4;
|
|
#
|
|
# Bug#57024: Poor performance when conjunctive condition over the outer
|
|
# table is used in the on condition of an outer join
|
|
#
|
|
create table t1 (a int);
|
|
insert into t1 values (NULL), (NULL), (NULL), (NULL);
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
insert into t1 values (4), (2), (1), (3);
|
|
create table t2 like t1;
|
|
insert into t2 select if(t1.a is null, 10, t1.a) from t1;
|
|
create table t3 (a int, b int, index idx(a));
|
|
insert into t3 values (1, 100), (3, 301), (4, 402), (1, 102), (1, 101);
|
|
insert into t3 values (11, 100), (33, 301), (44, 402), (11, 102), (11, 101);
|
|
insert into t3 values (22, 100), (53, 301), (64, 402), (22, 102), (22, 101);
|
|
analyze table t1,t2,t3;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
flush status;
|
|
select sum(t3.b) from t1 left join t3 on t3.a=t1.a and t1.a is not null;
|
|
sum(t3.b)
|
|
1006
|
|
show status like "handler_read%";
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 4
|
|
Handler_read_last 0
|
|
Handler_read_next 5
|
|
Handler_read_prev 0
|
|
Handler_read_retry 0
|
|
Handler_read_rnd 5
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 1048581
|
|
flush status;
|
|
select sum(t3.b) from t2 left join t3 on t3.a=t2.a and t2.a <> 10;
|
|
sum(t3.b)
|
|
1006
|
|
show status like "handler_read%";
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 4
|
|
Handler_read_last 0
|
|
Handler_read_next 5
|
|
Handler_read_prev 0
|
|
Handler_read_retry 0
|
|
Handler_read_rnd 5
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 1048581
|
|
drop table t1,t2,t3;
|
|
#
|
|
# Bug#57688 Assertion `!table || (!table->write_set || bitmap_is_set(table->write_set, field
|
|
#
|
|
CREATE TABLE t1 (f1 INT NOT NULL, PRIMARY KEY (f1));
|
|
CREATE TABLE t2 (f1 INT NOT NULL, f2 INT NOT NULL, PRIMARY KEY (f1, f2));
|
|
INSERT INTO t1 VALUES (4);
|
|
INSERT INTO t2 VALUES (3, 3);
|
|
INSERT INTO t2 VALUES (7, 7);
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4
|
|
GROUP BY t2.f1, t2.f2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1 Using temporary; Using filesort
|
|
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using index
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4
|
|
GROUP BY t2.f1, t2.f2;
|
|
f1 f1 f2
|
|
4 NULL NULL
|
|
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
|
|
GROUP BY t2.f1, t2.f2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1
|
|
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using where; Using index; Using filesort
|
|
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
|
|
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
|
|
GROUP BY t2.f1, t2.f2;
|
|
f1 f1 f2
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug#13068506 - QUERY WITH GROUP BY ON NON-AGGR COLUMN RETURNS
|
|
# WRONG RESULT
|
|
#
|
|
CREATE TABLE t1 (i1 int);
|
|
INSERT INTO t1 VALUES (100), (101);
|
|
CREATE TABLE t2 (i2 int, i3 int);
|
|
INSERT INTO t2 VALUES (20,1),(10,2);
|
|
CREATE TABLE t3 (i4 int(11));
|
|
INSERT INTO t3 VALUES (1),(2);
|
|
|
|
SELECT (
|
|
SELECT MAX( t2.i2 )
|
|
FROM t3 RIGHT JOIN t2 ON ( t2.i3 = 2 )
|
|
WHERE t2.i3 <> t1.i1
|
|
) AS field1
|
|
FROM t1;;
|
|
field1
|
|
20
|
|
20
|
|
|
|
SELECT (
|
|
SELECT MAX( t2.i2 )
|
|
FROM t3 RIGHT JOIN t2 ON ( t2.i3 = 2 )
|
|
WHERE t2.i3 <> t1.i1
|
|
) AS field1
|
|
FROM t1 GROUP BY field1;;
|
|
field1
|
|
20
|
|
|
|
drop table t1,t2,t3;
|
|
# End of test for Bug#13068506
|
|
End of 5.1 tests
|
|
#
|
|
# LP BUG#994392: Wrong result with RIGHT/LEFT JOIN and ALL subquery
|
|
# predicate in WHERE condition.
|
|
#
|
|
CREATE TABLE t1(a INT);
|
|
INSERT INTO t1 VALUES(9);
|
|
CREATE TABLE t2(b INT);
|
|
INSERT INTO t2 VALUES(8);
|
|
CREATE TABLE t3(c INT);
|
|
INSERT INTO t3 VALUES(3);
|
|
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
|
|
b c
|
|
NULL 3
|
|
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
|
|
c b
|
|
3 NULL
|
|
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
|
|
b c
|
|
NULL 3
|
|
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
|
|
c b
|
|
3 NULL
|
|
drop table t1,t2,t3;
|
|
End of 5.2 tests
|
|
#
|
|
# LP bug #813447: LEFT JOIN with single-row inner table and
|
|
# a subquery in ON expression
|
|
#
|
|
CREATE TABLE t1 (a int);
|
|
INSERT INTO t1 VALUES (0);
|
|
CREATE TABLE t2 (a int);
|
|
INSERT INTO t2 VALUES (0);
|
|
CREATE TABLE t3 (a int);
|
|
INSERT INTO t3 VALUES (0), (0);
|
|
SELECT t2.a FROM t1 LEFT JOIN t2 ON (6) IN (SELECT a FROM t3);
|
|
a
|
|
NULL
|
|
EXPLAIN EXTENDED
|
|
SELECT t2.a FROM t1 LEFT JOIN t2 ON (6) IN (SELECT a FROM t3);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00
|
|
1 PRIMARY t2 system NULL NULL NULL NULL 1 100.00
|
|
2 SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select NULL AS `a` from `test`.`t2` where 1
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# LP bug #817384 Wrong result with outer join + subquery in ON
|
|
# clause +unique key
|
|
#
|
|
CREATE TABLE t1 ( c int NOT NULL , b char(1) NOT NULL ) ;
|
|
INSERT INTO t1 VALUES (1,'b');
|
|
CREATE TABLE t2 ( a int NOT NULL , b char(1) NOT NULL , PRIMARY KEY (a)) ;
|
|
INSERT INTO t2 VALUES (1,'a');
|
|
create table t3 (c1 char(1), c2 char(2));
|
|
insert into t3 values ('c','d');
|
|
insert into t3 values ('c','d');
|
|
EXPLAIN SELECT t2.b
|
|
FROM t1 LEFT JOIN t2 ON t1.c = t2.a AND ( t2.b , t1.b ) IN (SELECT * from t3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
|
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 const 1 Using where
|
|
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where
|
|
SELECT t2.b
|
|
FROM t1 LEFT JOIN t2 ON t1.c = t2.a AND ( t2.b , t1.b ) IN (SELECT * from t3);
|
|
b
|
|
NULL
|
|
EXPLAIN SELECT t2.b
|
|
FROM t1 LEFT JOIN t2 ON (t2.b) IN (SELECT c2 from t3) AND t2.a = 1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
|
1 PRIMARY t2 const PRIMARY PRIMARY 4 const 1 Using where
|
|
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where
|
|
SELECT t2.b
|
|
FROM t1 LEFT JOIN t2 ON (t2.b) IN (SELECT c2 from t3) AND t2.a = 1;
|
|
b
|
|
NULL
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# lp:825035 second execution of PS with outer join
|
|
#
|
|
CREATE TABLE t1 (a int);
|
|
INSERT INTO t1 VALUES (1),(2),(3),(4);
|
|
CREATE TABLE t2 (a int);
|
|
PREPARE stmt FROM
|
|
"SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a";
|
|
EXECUTE stmt;
|
|
a a
|
|
1 NULL
|
|
2 NULL
|
|
3 NULL
|
|
4 NULL
|
|
EXECUTE stmt;
|
|
a a
|
|
1 NULL
|
|
2 NULL
|
|
3 NULL
|
|
4 NULL
|
|
DEALLOCATE PREPARE stmt;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# lp:838633 second execution of PS with outer join
|
|
# converted to inner join
|
|
#
|
|
CREATE TABLE t1 ( b int NOT NULL ) ;
|
|
INSERT INTO t1 VALUES (9),(10);
|
|
CREATE TABLE t2 ( b int NOT NULL, PRIMARY KEY (b)) ;
|
|
INSERT INTO t2 VALUES
|
|
(75),(76),(77),(78),(79),(80),(81),(82),(83),(84),(85),(86),(87),(88),(89),
|
|
(10), (90),(91),(92),(93),(94),(95),(96),(97),(98),(99),(100);
|
|
CREATE TABLE t3 ( a int, b int NOT NULL , PRIMARY KEY (b)) ;
|
|
INSERT INTO t3 VALUES
|
|
(0,6),(0,7),(0,8),(2,9),(0,10),(2,21),(0,22),(2,23),(2,24),(2,25);
|
|
set @save_join_cache_level= @@join_cache_level;
|
|
SET SESSION join_cache_level=4;
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM (t2 LEFT JOIN t1 ON t1.b = t2.b) JOIN t3 ON t1.b = t3.b;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t2 hash_index PRIMARY #hash#PRIMARY:PRIMARY 4:4 test.t1.b 27 3.70 Using index; Using join buffer (flat, BNLH join)
|
|
1 SIMPLE t3 hash_ALL PRIMARY #hash#PRIMARY 4 test.t1.b 10 10.00 Using join buffer (incremental, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t2`.`b` AS `b`,`test`.`t1`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t2` join `test`.`t1` join `test`.`t3` where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t3`.`b` = `test`.`t1`.`b`
|
|
PREPARE stmt FROM
|
|
'SELECT * FROM (t2 LEFT JOIN t1 ON t1.b = t2.b) JOIN t3 ON t1.b = t3.b';
|
|
EXECUTE stmt;
|
|
b b a b
|
|
10 10 0 10
|
|
EXECUTE stmt;
|
|
b b a b
|
|
10 10 0 10
|
|
DEALLOCATE PREPARE stmt;
|
|
SET SESSION join_cache_level=@save_join_cache_level;
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# LP bug #943543: LEFT JOIN converted to JOIN with
|
|
# ORed IS NULL(primary key) in WHERE clause
|
|
#
|
|
CREATE TABLE t1 (
|
|
a int, b int NOT NULL, pk int NOT NULL,
|
|
PRIMARY KEY (pk), INDEX idx(b)
|
|
);
|
|
INSERT INTO t1 VALUES
|
|
(NULL,1,1), (6,2,2), (5,3,3), (NULL,4,4),
|
|
(1,9,6), (8,5,7), (NULL,8,8), (8,1,5);
|
|
CREATE TABLE t2 (pk int PRIMARY KEY);
|
|
INSERT INTO t2 VALUES (3), (8), (5);
|
|
EXPLAIN EXTENDED
|
|
SELECT t1.pk FROM t2 JOIN t1 ON t2.pk = t1.a
|
|
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
|
|
ORDER BY t1.pk;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 100.00
|
|
1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select 5 AS `pk` from `test`.`t2` join `test`.`t1` where 1 order by 5
|
|
SELECT t1.pk FROM t2 JOIN t1 ON t2.pk = t1.a
|
|
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
|
|
ORDER BY t1.pk;
|
|
pk
|
|
5
|
|
EXPLAIN EXTENDED
|
|
SELECT t1.pk FROM t2 LEFT JOIN t1 ON t2.pk = t1.a
|
|
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
|
|
ORDER BY t1.pk;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 const PRIMARY,idx PRIMARY 4 const 1 100.00
|
|
1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select 5 AS `pk` from `test`.`t2` join `test`.`t1` where 1 order by 5
|
|
SELECT t1.pk FROM t2 LEFT JOIN t1 ON t2.pk = t1.a
|
|
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
|
|
ORDER BY t1.pk;
|
|
pk
|
|
5
|
|
DROP TABLE t2;
|
|
CREATE TABLE t2 (c int, d int, KEY (c));
|
|
INSERT INTO t2 VALUES
|
|
(3,30), (8,88), (5,50), (8,81),
|
|
(4,40), (9,90), (7,70), (9,90),
|
|
(13,130), (18,188), (15,150), (18,181),
|
|
(14,140), (19,190), (17,170), (19,190);
|
|
INSERT INTO t1 VALUES (8,5,9);
|
|
EXPLAIN EXTENDED
|
|
SELECT t1.b, t2.c, t2.d FROM t2 JOIN t1 ON t2.c = t1.a
|
|
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
|
ORDER BY t1.b;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ref idx idx 4 const 2 100.00 Using where
|
|
1 SIMPLE t2 ref c c 5 test.t1.a 2 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
|
|
SELECT t1.b, t2.c, t2.d FROM t2 JOIN t1 ON t2.c = t1.a
|
|
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
|
ORDER BY t1.b;
|
|
b c d
|
|
5 8 88
|
|
5 8 88
|
|
5 8 81
|
|
5 8 81
|
|
EXPLAIN EXTENDED
|
|
SELECT t1.b, t2.c, t2.d FROM t2 LEFT JOIN t1 ON t2.c = t1.a
|
|
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
|
ORDER BY t1.b;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ref PRIMARY,idx idx 4 const 2 100.00 Using where
|
|
1 SIMPLE t2 ref c c 5 test.t1.a 2 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
|
|
SELECT t1.b, t2.c, t2.d FROM t2 LEFT JOIN t1 ON t2.c = t1.a
|
|
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
|
ORDER BY t1.b;
|
|
b c d
|
|
5 8 88
|
|
5 8 88
|
|
5 8 81
|
|
5 8 81
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug mdev-4336: LEFT JOIN with disjunctive
|
|
# <non-nullable datetime field> IS NULL in WHERE
|
|
# causes a hang and eventual crash
|
|
#
|
|
CREATE TABLE t1 (
|
|
id int(11) NOT NULL,
|
|
modified datetime NOT NULL,
|
|
PRIMARY KEY (id)
|
|
);
|
|
SELECT a.* FROM t1 a LEFT JOIN t1 b ON a.id = b.id
|
|
WHERE a.modified > b.modified or b.modified IS NULL;
|
|
id modified
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-4817: Optimizer fails to optimize expression of the form 'FOO' IS NULL
|
|
#
|
|
create table t0 (a int not null);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
alter table t0 add person_id varchar(255) not null;
|
|
create table t1 (pk int not null primary key);
|
|
insert into t1 select A.a + 10*B.a from t0 A, t0 B;
|
|
explain select * from t1 left join t0 on t0.a=t1.pk where t0.person_id='fooo' or 'xyz' IS NULL;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using index
|
|
explain select * from t1 left join t0 on t0.a=t1.pk where t0.person_id='fooo';
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using index
|
|
explain select * from t1 left join t0 on t0.a=t1.pk where t0.person_id='fooo' or t0.person_id='bar';
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using index
|
|
drop table t0, t1;
|
|
#
|
|
# MDEV-4836: Wrong result on <not null date column> IS NULL (old documented hack stopped working)
|
|
# (this is a regression after fix for MDEV-4817)
|
|
#
|
|
CREATE TABLE t1 (id INT, d DATE NOT NULL);
|
|
INSERT INTO t1 VALUES (1,'0000-00-00'),(2,'0000-00-00');
|
|
CREATE TABLE t2 (i INT);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON (id=i) WHERE NULL OR d IS NULL;
|
|
id d i
|
|
1 0000-00-00 NULL
|
|
2 0000-00-00 NULL
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (i1 INT, d1 DATE NOT NULL);
|
|
INSERT INTO t1 VALUES (1,'2012-12-21'),(2,'0000-00-00');
|
|
CREATE TABLE t2 (i2 INT, j2 INT);
|
|
INSERT INTO t2 VALUES (1,10),(2,20);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON i1 = j2 WHERE d1 IS NULL AND 1 OR i1 = i2;
|
|
i1 d1 i2 j2
|
|
2 0000-00-00 NULL NULL
|
|
DROP TABLE t1,t2;
|
|
# Another testcase
|
|
CREATE TABLE t1 (i1 INT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (NULL);
|
|
CREATE TABLE t2 (i2 INT, a INT, b INT) ENGINE=MyISAM;
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
|
|
INSERT INTO t2 VALUES (NULL,1,2),(NULL,2,3);
|
|
SELECT * FROM t1 LEFT JOIN v2 ON i1 = i2 WHERE a < b;
|
|
i1 i2 a b
|
|
SELECT * FROM t1 LEFT JOIN t2 ON i1 = i2 WHERE a < b;
|
|
i1 i2 a b
|
|
drop view v2;
|
|
drop table t1,t2;
|
|
#
|
|
# Bug mdev-4942: LEFT JOIN with conjunctive
|
|
# <non-nullable datetime field> IS NULL in WHERE
|
|
# causes an assert failure
|
|
#
|
|
CREATE TABLE t1 ( i1 int, d1 date );
|
|
INSERT INTO t1 VALUES (1,'2001-06-26'), (2,'2000-11-16');
|
|
CREATE TABLE t2 ( i2 int, d2 date NOT NULL );
|
|
INSERT INTO t2 VALUES (3,'2000-03-06'), (4,'2007-09-25');
|
|
SELECT * FROM t1 LEFT JOIN t2 ON i1 = i2 WHERE d1 IS NULL AND d2 IS NULL;
|
|
i1 d1 i2 d2
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug mdev-4952: LEFT JOIN with disjunctive
|
|
# <non-nullable datetime field> IS NULL in WHERE
|
|
# causes an assert failure
|
|
#
|
|
CREATE TABLE t1 (a1 int, b1 int NOT NULL) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1, 10), (2, 11);
|
|
CREATE TABLE t2 (dt datetime NOT NULL, a2 int, b2 int) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES
|
|
('2006-10-08 09:34:54', 1, 100), ('2001-01-19 01:04:43', 2, 200);
|
|
SELECT * FROM t1 LEFT JOIN t2 ON a1 = a2
|
|
WHERE ( dt IS NULL OR FALSE ) AND b2 IS NULL;
|
|
a1 b1 dt a2 b2
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug mdev-4962: nested outer join with
|
|
# <non-nullable datetime field> IS NULL in WHERE
|
|
# causes an assert failure
|
|
#
|
|
CREATE TABLE t1 (i1 int) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (i2 int) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (10),(20);
|
|
CREATE TABLE t3 (i3 int, d3 datetime NOT NULL) ENGINE=MyISAM;
|
|
INSERT INTO t3 VALUES (8,'2008-12-04 17:53:42'),(9,'2012-12-21 12:12:12');
|
|
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON i2 = i3 ON i1 = i3
|
|
WHERE d3 IS NULL;
|
|
i1 i2 i3 d3
|
|
1 NULL NULL NULL
|
|
2 NULL NULL NULL
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON i2 = i3 ON i1 = i3
|
|
WHERE d3 IS NULL;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.i1 2 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
1 SIMPLE t3 hash_ALL NULL #hash#$hj 5 test.t1.i1 2 100.00 Using where; Using join buffer (incremental, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t2`.`i2` AS `i2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`d3` AS `d3` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`i2` = `test`.`t1`.`i1` and `test`.`t3`.`i3` = `test`.`t1`.`i1` and `test`.`t1`.`i1` is not null and `test`.`t1`.`i1` is not null) where `test`.`t3`.`d3` = 0 or `test`.`t3`.`d3` is null
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# Bug mdev-6705: wrong on expression after constant row substitution
|
|
# that triggers a simplification of WHERE condition
|
|
#
|
|
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (10,8);
|
|
CREATE TABLE t2 (c int) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (8),(9);
|
|
CREATE TABLE t3 (d int) ENGINE=MyISAM;
|
|
INSERT INTO t3 VALUES (3),(8);
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM t1 INNER JOIN t2 ON c = b LEFT JOIN t3 ON d = a
|
|
WHERE b IN (1,2,3) OR b = d;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t3 hash_ALL NULL #hash#$hj 5 const 2 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select 10 AS `a`,8 AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t3`.`d` AS `d` from `test`.`t2` left join `test`.`t3` on(`test`.`t3`.`d` = 10 and 10 is not null) where `test`.`t2`.`c` = 8 and `test`.`t3`.`d` = 8
|
|
SELECT * FROM t1 INNER JOIN t2 ON c = b LEFT JOIN t3 ON d = a
|
|
WHERE b IN (1,2,3) OR b = d;
|
|
a b c d
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# MDEV-6634: Wrong estimates for ref(const) and key IS NULL predicate
|
|
#
|
|
create table t1(a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2 (a int, b int, c int, key(b), key(c));
|
|
insert into t2 select
|
|
@a:=A.a + 10*B.a+100*C.a,
|
|
IF(@a<900, NULL, @a),
|
|
IF(@a<500, NULL, @a)
|
|
from t1 A, t1 B, t1 C;
|
|
delete from t1 where a=0;
|
|
# Check that there are different #rows of NULLs for b and c, both !=10:
|
|
explain select * from t2 force index (b) where b is null;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 ref b b 5 const 780 Using index condition
|
|
explain select * from t2 force index (c) where c is null;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 ref c c 5 const 393 Using index condition
|
|
explain select * from t1 left join t2 on t2.b is null;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 9
|
|
1 SIMPLE t2 ALL b NULL NULL NULL 1000 Using where; Using join buffer (flat, BNL join)
|
|
explain select * from t1 left join t2 on t2.c is null;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 9
|
|
1 SIMPLE t2 ALL c NULL NULL NULL 1000 Using where; Using join buffer (flat, BNL join)
|
|
drop table t1,t2;
|
|
#
|
|
# MDEV-10006: optimizer doesn't convert outer join to inner on views with WHERE clause
|
|
#
|
|
CREATE TABLE t1(i1 int primary key, v1 int, key(v1));
|
|
INSERT INTO t1 VALUES (1, 1);
|
|
INSERT INTO t1 VALUES (2, 2);
|
|
INSERT INTO t1 VALUES (3, 3);
|
|
INSERT INTO t1 VALUES (4, 4);
|
|
INSERT INTO t1 VALUES (5, 3);
|
|
INSERT INTO t1 VALUES (6, 6);
|
|
INSERT INTO t1 VALUES (7, 7);
|
|
INSERT INTO t1 VALUES (8, 8);
|
|
INSERT INTO t1 VALUES (9, 9);
|
|
CREATE TABLE t2(i2 int primary key, v2 int, key(v2));
|
|
INSERT INTO t2 VALUES (1, 1);
|
|
INSERT INTO t2 VALUES (2, 2);
|
|
INSERT INTO t2 VALUES (3, 3);
|
|
INSERT INTO t2 VALUES (4, 4);
|
|
INSERT INTO t2 VALUES (5, 3);
|
|
INSERT INTO t2 VALUES (6, 6);
|
|
INSERT INTO t2 VALUES (7, 7);
|
|
INSERT INTO t2 VALUES (8, 8);
|
|
INSERT INTO t2 VALUES (9, 9);
|
|
CREATE TABLE t3(i3 int primary key, v3 int, key(v3));
|
|
INSERT INTO t3 VALUES (2, 2);
|
|
INSERT INTO t3 VALUES (4, 4);
|
|
INSERT INTO t3 VALUES (6, 6);
|
|
INSERT INTO t3 VALUES (8, 8);
|
|
# This should have a join order of t3,t1,t2 (or t3,t2,t1, the idea is that t3 is the first one)
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM
|
|
(SELECT t1.i1 as i1, t1.v1 as v1,
|
|
t2.i2 as i2, t2.v2 as v2,
|
|
t3.i3 as i3, t3.v3 as v3
|
|
FROM t1 JOIN t2 on t1.i1 = t2.i2
|
|
LEFT JOIN t3 on t2.i2 = t3.i3
|
|
) as w1
|
|
WHERE v3 = 4;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t3 ref PRIMARY,v3 v3 5 const 1 100.00
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t1`.`v1` AS `v1`,`test`.`t2`.`i2` AS `i2`,`test`.`t2`.`v2` AS `v2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`v3` AS `v3` from `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t3`.`v3` = 4 and `test`.`t1`.`i1` = `test`.`t3`.`i3` and `test`.`t2`.`i2` = `test`.`t3`.`i3`
|
|
# This should have the same join order like the query above:
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM
|
|
(SELECT t1.i1 as i1, t1.v1 as v1,
|
|
t2.i2 as i2, t2.v2 as v2,
|
|
t3.i3 as i3, t3.v3 as v3
|
|
FROM t1 JOIN t2 on t1.i1 = t2.i2
|
|
LEFT JOIN t3 on t2.i2 = t3.i3
|
|
WHERE t1.i1 = t2.i2
|
|
AND 1 = 1
|
|
) as w2
|
|
WHERE v3 = 4;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t3 ref PRIMARY,v3 v3 5 const 1 100.00
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t1`.`v1` AS `v1`,`test`.`t2`.`i2` AS `i2`,`test`.`t2`.`v2` AS `v2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`v3` AS `v3` from `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t3`.`v3` = 4 and `test`.`t1`.`i1` = `test`.`t3`.`i3` and `test`.`t2`.`i2` = `test`.`t3`.`i3`
|
|
drop table t1,t2,t3;
|
|
#
|
|
# MDEV-11958: LEFT JOIN with stored routine produces incorrect result
|
|
#
|
|
CREATE TABLE t (x INT);
|
|
INSERT INTO t VALUES(1),(NULL);
|
|
CREATE FUNCTION f (val INT, ret INT) RETURNS INT DETERMINISTIC RETURN IFNULL(val, ret);
|
|
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
|
|
FROM t t1 LEFT JOIN t t2
|
|
ON t1.x = t2.x
|
|
WHERE IFNULL(t2.x,0)=0;
|
|
x x IFNULL(t2.x,0) f(t2.x,0)
|
|
NULL NULL 0 0
|
|
explain extended
|
|
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
|
|
FROM t t1 LEFT JOIN t t2
|
|
ON t1.x = t2.x
|
|
WHERE IFNULL(t2.x,0)=0;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.x 2 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t2`.`x` AS `x`,ifnull(`test`.`t2`.`x`,0) AS `IFNULL(t2.x,0)`,`f`(`test`.`t2`.`x`,0) AS `f(t2.x,0)` from `test`.`t` `t1` left join `test`.`t` `t2` on(`test`.`t2`.`x` = `test`.`t1`.`x` and `test`.`t1`.`x` is not null) where ifnull(`test`.`t2`.`x`,0) = 0
|
|
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
|
|
FROM t t1 LEFT JOIN t t2
|
|
ON t1.x = t2.x
|
|
WHERE f(t2.x,0)=0;
|
|
x x IFNULL(t2.x,0) f(t2.x,0)
|
|
NULL NULL 0 0
|
|
explain extended
|
|
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
|
|
FROM t t1 LEFT JOIN t t2
|
|
ON t1.x = t2.x
|
|
WHERE f(t2.x,0)=0;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.x 2 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t2`.`x` AS `x`,ifnull(`test`.`t2`.`x`,0) AS `IFNULL(t2.x,0)`,`f`(`test`.`t2`.`x`,0) AS `f(t2.x,0)` from `test`.`t` `t1` left join `test`.`t` `t2` on(`test`.`t2`.`x` = `test`.`t1`.`x` and `test`.`t1`.`x` is not null) where `f`(`test`.`t2`.`x`,0) = 0
|
|
drop function f;
|
|
drop table t;
|
|
CREATE TABLE t1 (
|
|
col1 DECIMAL(33,5) NULL DEFAULT NULL,
|
|
col2 DECIMAL(33,5) NULL DEFAULT NULL
|
|
);
|
|
CREATE TABLE t2 (
|
|
col1 DECIMAL(33,5) NULL DEFAULT NULL,
|
|
col2 DECIMAL(33,5) NULL DEFAULT NULL,
|
|
col3 DECIMAL(33,5) NULL DEFAULT NULL
|
|
);
|
|
INSERT INTO t1 VALUES (2, 1.1), (2, 2.1);
|
|
INSERT INTO t2 VALUES (3, 3.1, 4), (1, 1, NULL);
|
|
CREATE FUNCTION f1 ( p_num DECIMAL(45,15), p_return DECIMAL(45,15))
|
|
RETURNS decimal(33,5)
|
|
LANGUAGE SQL
|
|
DETERMINISTIC
|
|
CONTAINS SQL
|
|
SQL SECURITY INVOKER
|
|
BEGIN
|
|
IF p_num IS NULL THEN
|
|
RETURN p_return;
|
|
ELSE
|
|
RETURN p_num;
|
|
END IF;
|
|
END |
|
|
SELECT t1.col1, t2.col1, t2.col3
|
|
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
|
|
WHERE IFNULL(t2.col3,0) = 0;
|
|
col1 col1 col3
|
|
2.00000 NULL NULL
|
|
2.00000 NULL NULL
|
|
EXPLAIN EXTENDED SELECT t1.col1, t2.col1, t2.col3
|
|
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
|
|
WHERE IFNULL(t2.col3,0) = 0;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 17 test.t1.col1 2 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`col1` AS `col1`,`test`.`t2`.`col1` AS `col1`,`test`.`t2`.`col3` AS `col3` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`col2` = `test`.`t1`.`col1` and `test`.`t1`.`col1` is not null) where ifnull(`test`.`t2`.`col3`,0) = 0
|
|
SELECT t1.col1, t2.col1, t2.col3
|
|
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
|
|
WHERE f1(t2.col3,0) = 0;
|
|
col1 col1 col3
|
|
2.00000 NULL NULL
|
|
2.00000 NULL NULL
|
|
EXPLAIN EXTENDED SELECT t1.col1, t2.col1, t2.col3
|
|
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
|
|
WHERE f1(t2.col3,0) = 0;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 17 test.t1.col1 2 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`col1` AS `col1`,`test`.`t2`.`col1` AS `col1`,`test`.`t2`.`col3` AS `col3` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`col2` = `test`.`t1`.`col1` and `test`.`t1`.`col1` is not null) where `f1`(`test`.`t2`.`col3`,0) = 0
|
|
DROP FUNCTION f1;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-10397: Server crashes in key_copy with join_cache_level > 2 and join on BIT fields
|
|
#
|
|
CREATE TABLE t1 (b1 BIT NOT NULL);
|
|
INSERT INTO t1 VALUES (0),(1);
|
|
CREATE TABLE t2 (b2 BIT NOT NULL);
|
|
INSERT INTO t2 VALUES (0),(1);
|
|
set @save_join_cache_level= @@join_cache_level;
|
|
SET @@join_cache_level = 3;
|
|
SELECT t1.b1+'0' , t2.b2 + '0' FROM t1 LEFT JOIN t2 ON b1 = b2;
|
|
t1.b1+'0' t2.b2 + '0'
|
|
0 0
|
|
1 1
|
|
DROP TABLE t1, t2;
|
|
set @@join_cache_level= @save_join_cache_level;
|
|
#
|
|
# MDEV-14779: using left join causes incorrect results with materialization and derived tables
|
|
#
|
|
create table t1(id int);
|
|
insert into t1 values (1),(2);
|
|
create table t2(sid int, id int);
|
|
insert into t2 values (1,1),(2,2);
|
|
select * from t1 t
|
|
left join (select * from t2 where sid in (select max(sid) from t2 where 0=1 group by id)) r
|
|
on t.id=r.id ;
|
|
id sid id
|
|
1 NULL NULL
|
|
2 NULL NULL
|
|
drop table t1, t2;
|
|
#
|
|
# MDEV-16726: SELECT with STRAGHT JOIN containing NESTED RIGHT JOIN
|
|
# converted to INNER JOIN with first constant inner table
|
|
#
|
|
CREATE TABLE t1 (
|
|
pk int PRIMARY KEY, i1 int, v1 varchar(1), v2 varchar(1), KEY v1 (v1,i1)
|
|
) engine=MyISAM;
|
|
INSERT INTO t1 VALUES
|
|
(8,3,'c','c'),(9,4,'z','z'),(10,3,'i','i'),(11,186,'x','x'),
|
|
(14,226,'m','m'),(15,133,'p','p');
|
|
CREATE TABLE t2 (
|
|
pk int PRIMARY KEY, i1 int, v1 varchar(1), v2 varchar(1)
|
|
) engine=MyISAM;
|
|
INSERT INTO t2 VALUES (10,6,'p','p');
|
|
EXPLAIN EXTENDED
|
|
SELECT STRAIGHT_JOIN t2.v2
|
|
FROM
|
|
(t1 as tb1 LEFT JOIN t1 AS tb2 ON tb2.v1 = tb1.v2)
|
|
RIGHT JOIN
|
|
(t2,t1)
|
|
ON t1.pk = t2.pk AND t2.v2 = tb1.v1
|
|
WHERE tb1.pk = 40
|
|
ORDER BY tb1.i1;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
|
Warnings:
|
|
Note 1003 select straight_join 'p' AS `v2` from `test`.`t1` join `test`.`t1` `tb1` left join `test`.`t1` `tb2` on(multiple equal(NULL, NULL)) where 0 order by NULL
|
|
EXPLAIN EXTENDED
|
|
SELECT STRAIGHT_JOIN t2.v2
|
|
FROM
|
|
(t2,t1)
|
|
LEFT JOIN
|
|
(t1 as tb1 LEFT JOIN t1 AS tb2 ON tb2.v1 = tb1.v2)
|
|
ON t1.pk = t2.pk AND t2.v2 = tb1.v1
|
|
WHERE tb1.pk = 40
|
|
ORDER BY tb1.i1;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
|
Warnings:
|
|
Note 1003 select straight_join 'p' AS `v2` from `test`.`t1` join `test`.`t1` `tb1` left join `test`.`t1` `tb2` on(multiple equal(NULL, NULL)) where 0 order by NULL
|
|
SELECT STRAIGHT_JOIN DISTINCT t2.v2
|
|
FROM
|
|
(t1 as tb1 LEFT JOIN t1 AS tb2 ON tb2.v1 = tb1.v2)
|
|
RIGHT JOIN
|
|
(t2,t1)
|
|
ON t1.pk = t2.pk AND t2.v2 = tb1.v1
|
|
WHERE tb1.pk = 40
|
|
ORDER BY tb1.i1;
|
|
v2
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# MDEV-19790 : IS NOT TRUE / IS NOT FALSE predicates over
|
|
# inner tables of outer joins
|
|
#
|
|
create table t1 (a int);
|
|
create table t2 (b int);
|
|
insert into t1 values (3), (7), (1);
|
|
insert into t2 values (7), (4), (3);
|
|
select * from t1 left join t2 on a=b;
|
|
a b
|
|
7 7
|
|
3 3
|
|
1 NULL
|
|
select * from t1 left join t2 on a=b where (b > 3) is not true;
|
|
a b
|
|
3 3
|
|
1 NULL
|
|
explain extended select * from t1 left join t2 on a=b where (b > 3) is not true;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.a 3 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`b` = `test`.`t1`.`a` and `test`.`t1`.`a` is not null) where `test`.`t2`.`b` > 3 is not true
|
|
select * from t1 left join t2 on a=b where (b > 3) is not false;
|
|
a b
|
|
7 7
|
|
1 NULL
|
|
explain extended select * from t1 left join t2 on a=b where (b > 3) is not false;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.a 3 100.00 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`b` = `test`.`t1`.`a` and `test`.`t1`.`a` is not null) where `test`.`t2`.`b` > 3 is not false
|
|
drop table t1,t2;
|
|
# end of 5.5 tests
|
|
#
|
|
# MDEV-19258: chained right joins all converted to inner joins
|
|
#
|
|
CREATE TABLE t1 (
|
|
id int NOT NULL AUTO_INCREMENT,
|
|
timestamp bigint NOT NULL,
|
|
modifiedBy varchar(255) DEFAULT NULL,
|
|
PRIMARY KEY (id)
|
|
);
|
|
CREATE TABLE t2 (
|
|
id int NOT NULL,
|
|
REV int NOT NULL,
|
|
REVTYPE tinyint DEFAULT NULL,
|
|
profile_id int DEFAULT NULL,
|
|
PRIMARY KEY (id,REV)
|
|
);
|
|
CREATE TABLE t3 (
|
|
id int NOT NULL,
|
|
REV int NOT NULL,
|
|
person_id int DEFAULT NULL,
|
|
PRIMARY KEY (id,REV)
|
|
);
|
|
CREATE TABLE t4 (
|
|
id int NOT NULL,
|
|
REV int NOT NULL,
|
|
PRIMARY KEY (id,REV)
|
|
);
|
|
INSERT INTO t1 VALUES
|
|
(1,1294391193890,'Cxqy$*9.kKeE'),(2,1294643906883,'rE4wqGV0gif@'),
|
|
(3,1294643927456,'L?3yt(%dY$Br'),(4,1294644343525,'WH&ObiZ$#2S4'),
|
|
(5,1294644616416,'YXnCbt?olUZ0'),(6,1294644954537,'8Npe4!(#lU@k'),
|
|
(7,1294645046659,'knc0GhXB1#ib'),(8,1294645183829,'w*oPpVfuS8^m'),
|
|
(9,1294645386701,'hwXR@3qVzrbU'),(10,1294645525982,'BeLW*Y9ndP0l'),
|
|
(11,1294645627723,'nTegib^)qZ$I'),(12,1294650860266,'u62C^Kzx3wH8'),
|
|
(13,1294657613745,'4&BkFjGa!qLg'),(14,1294660627161,')anpt312SCoh'),
|
|
(15,1294661023336,'LtJ2PX?*kTmx'),(16,1294662838066,'POGRr@?#ofpl'),
|
|
(17,1294663020989,'o.)1EOT2jnF7'),(18,1294663308065,'&TZ0F0LHE6.h'),
|
|
(19,1294664900039,'j)kSC%^In$9d'),(20,1294668904556,'97glN50)cAo.'),
|
|
(21,1294728056853,'lrKZxmw?I.Ek'),(22,1294728157174,'@P*SRg!pT.q?'),
|
|
(23,1294728327099,'W9gPrptF.)8n'),(24,1294728418481,'$q*c^sM&URd#'),
|
|
(25,1294728729620,'9*f4&bTPRtHo'),(26,1294728906014,')4VtTEnS7$oI'),
|
|
(27,1294732190003,'8dkNSPq2u3AQ'),(28,1294733205065,'SV2N6IoEf438'),
|
|
(29,1294741984927,'rBKj.0S^Ey%*'),(30,1294751748352,'j$2DvlBqk)Fw'),
|
|
(31,1294753902212,'C$N6OrEw8elz'),(32,1294758120598,'DCSVZw!rnxXq'),
|
|
(33,1294761769556,'OTS@QU8a6s5c'),(34,1294816845305,'IUE2stG0D3L5'),
|
|
(35,1294816966909,'Xd16yka.9nHe'),(36,1294817116302,'lOQHZpm%!8qb'),
|
|
(37,1294817374775,'^&pE3IhNf7ey'),(38,1294817538907,'oEn4#7C0Vhfp'),
|
|
(39,1294818482950,'bx54J*O0Va&?'),(40,1294819047024,'J%@a&1.qgdb?'),
|
|
(41,1294821826077,'C9kojr$L3Phz'),(42,1294825454458,'gG#BOnM80ZPi'),
|
|
(43,1294904129918,'F^!TrjM#zdvc'),(44,1294904254166,'Va&Tb)k0RvlM'),
|
|
(45,1294904414964,'dJjq0M6HvhR#'),(46,1294904505784,'nJmxg)ELqY(b'),
|
|
(47,1294904602835,'dhF#or$Vge!7'),(48,1294904684728,'?bIh5E3l!0em'),
|
|
(49,1294904877898,'Y*WflOdcxnk.'),(50,1294905002390,'*?H!lUgez5A.'),
|
|
(51,1294905096043,'wlEIY3n9uz!p'),(52,1294905404621,'T?qv3H6&hlQD'),
|
|
(53,1294905603922,'S@Bhys^Ti7bt'),(54,1294905788416,'KR?a5NVukz#l'),
|
|
(55,1294905993190,'A*&q4kWhED!o'),(56,1294906205254,'fT0%7z0DF6h*'),
|
|
(57,1294906319680,'LhzdW4?ivjR0'),(58,1294906424296,'h0KDlns%U*6T'),
|
|
(59,1294906623844,'b$CfB1noI6Ax'),(60,1294911258896,'#T1*LP!3$Oys');
|
|
INSERT INTO t2 VALUES
|
|
(1,1,0,10209),(1,42480,1,10209),(1,61612,1,10209),(1,257545,1,10209),
|
|
(1,385332,1,10209),(1,1687999,1,10209),(3,1,0,10210),(3,617411,2,10210),
|
|
(4,11,0,14),(4,95149,1,10211),(4,607890,2,10211),(5,1,0,10212),
|
|
(6,1,0,10213),(6,93344,1,10213),(6,295578,1,10213),(6,295579,1,10213),
|
|
(6,295644,1,10213),(7,1,0,10214),(7,12,1,7),(7,688796,1,10214),
|
|
(7,1140433,1,10214),(7,1715227,1,10214),(8,1,0,10215),(8,74253,1,10215),
|
|
(8,93345,1,10215),(8,12,2,2),(9,1,0,10216),(9,93342,1,10216),
|
|
(9,122354,1,10216),(9,301499,2,10216),(10,11,0,5),(10,93343,1,10217),
|
|
(10,122355,1,10217),(10,123050,1,10217),(10,301500,2,10217),(11,1,0,10218),
|
|
(11,87852,1,10218),(11,605499,2,10218),(12,1,0,10219),(12,88024,1,10219),
|
|
(12,605892,2,10219),(13,1,0,10220);
|
|
INSERT INTO t3 VALUES
|
|
(1,1,300003),(1,117548,NULL),(2,1,300003),(2,117548,300006),
|
|
(3,1,300153),(3,117548,NULL),(4,1,300153),(4,117548,NULL),
|
|
(5,1,300153),(5,117548,NULL),(6,1,300182),(6,117548,NULL),
|
|
(7,1,300205),(7,117548,NULL),(8,1,300217),(8,117548,NULL),
|
|
(9,1,300290),(9,117548,NULL),(10,1,300290),(10,117548,NULL),
|
|
(11,1,300405),(11,117548,NULL),(12,1,300670),(12,117548,NULL),
|
|
(13,1,300670),(13,117548,NULL),(14,1,300006),(14,117548,NULL),
|
|
(15,1,300671),(15,117548,NULL),(16,1,300732),(16,117548,NULL);
|
|
INSERT INTO t4 VALUES
|
|
(300000,1),(300001,1),(300003,1),(300004,1),
|
|
(300005,1),(300005,688796),(300006,1),(300006,97697),
|
|
(300009,1),(300010,1),(300011,1),(300012,1),(300013,1),
|
|
(300014,1),(300015,1),(300016,1),(300017,1),(300018,1),
|
|
(300019,1),(300020,1),(300021,1),(300022,1),(300023,1),
|
|
(300024,1),(300025,1),(300026,1),(300027,1),(300028,1);
|
|
# This should have join order of t2,t3,t4,t1
|
|
EXPLAIN EXTENDED SELECT *
|
|
FROM t1 INNER JOIN t2 ON t2.REV=t1.id
|
|
INNER JOIN t3 ON t3.id=t2.profile_id
|
|
INNER JOIN t4 ON t4.id=t3.person_id
|
|
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416 AND
|
|
t2.REVTYPE=2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 42 100.00 Using where
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.REV 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
1 SIMPLE t3 ref PRIMARY PRIMARY 4 test.t2.profile_id 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
|
1 SIMPLE t4 ref PRIMARY PRIMARY 4 test.t3.person_id 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`id` AS `id`,`test`.`t1`.`timestamp` AS `timestamp`,`test`.`t1`.`modifiedBy` AS `modifiedBy`,`test`.`t2`.`id` AS `id`,`test`.`t2`.`REV` AS `REV`,`test`.`t2`.`REVTYPE` AS `REVTYPE`,`test`.`t2`.`profile_id` AS `profile_id`,`test`.`t3`.`id` AS `id`,`test`.`t3`.`REV` AS `REV`,`test`.`t3`.`person_id` AS `person_id`,`test`.`t4`.`id` AS `id`,`test`.`t4`.`REV` AS `REV` from `test`.`t1` join `test`.`t2` join `test`.`t3` join `test`.`t4` where `test`.`t2`.`REVTYPE` = 2 and `test`.`t4`.`id` = `test`.`t3`.`person_id` and `test`.`t3`.`id` = `test`.`t2`.`profile_id` and `test`.`t1`.`id` = `test`.`t2`.`REV` and `test`.`t1`.`timestamp` < 1294664900039 and `test`.`t1`.`timestamp` > 1294644616416
|
|
SELECT *
|
|
FROM t1 INNER JOIN t2 ON t2.REV=t1.id
|
|
INNER JOIN t3 ON t3.id=t2.profile_id
|
|
INNER JOIN t4 ON t4.id=t3.person_id
|
|
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416 AND
|
|
t2.REVTYPE=2;
|
|
id timestamp modifiedBy id REV REVTYPE profile_id id REV person_id id REV
|
|
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 1 300003 300003 1
|
|
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 1
|
|
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 97697
|
|
# This should have join order of t2,t3,t4,t1 with the same plan as above
|
|
# because all RIGHT JOIN operations are converted into INNER JOIN
|
|
EXPLAIN EXTENDED SELECT *
|
|
FROM t1 RIGHT JOIN t2 ON t2.REV=t1.id
|
|
RIGHT JOIN t3 ON t3.id=t2.profile_id
|
|
RIGHT JOIN t4 ON t4.id=t3.person_id
|
|
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416
|
|
AND t2.REVTYPE=2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 42 100.00 Using where
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.REV 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
|
1 SIMPLE t3 ref PRIMARY PRIMARY 4 test.t2.profile_id 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
|
1 SIMPLE t4 ref PRIMARY PRIMARY 4 test.t3.person_id 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`id` AS `id`,`test`.`t1`.`timestamp` AS `timestamp`,`test`.`t1`.`modifiedBy` AS `modifiedBy`,`test`.`t2`.`id` AS `id`,`test`.`t2`.`REV` AS `REV`,`test`.`t2`.`REVTYPE` AS `REVTYPE`,`test`.`t2`.`profile_id` AS `profile_id`,`test`.`t3`.`id` AS `id`,`test`.`t3`.`REV` AS `REV`,`test`.`t3`.`person_id` AS `person_id`,`test`.`t4`.`id` AS `id`,`test`.`t4`.`REV` AS `REV` from `test`.`t4` join `test`.`t3` join `test`.`t2` join `test`.`t1` where `test`.`t2`.`REVTYPE` = 2 and `test`.`t1`.`id` = `test`.`t2`.`REV` and `test`.`t3`.`id` = `test`.`t2`.`profile_id` and `test`.`t4`.`id` = `test`.`t3`.`person_id` and `test`.`t1`.`timestamp` < 1294664900039 and `test`.`t1`.`timestamp` > 1294644616416
|
|
SELECT *
|
|
FROM t1 RIGHT JOIN t2 ON t2.REV=t1.id
|
|
RIGHT JOIN t3 ON t3.id=t2.profile_id
|
|
RIGHT JOIN t4 ON t4.id=t3.person_id
|
|
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416
|
|
AND t2.REVTYPE=2;
|
|
id timestamp modifiedBy id REV REVTYPE profile_id id REV person_id id REV
|
|
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 1 300003 300003 1
|
|
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 1
|
|
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 97697
|
|
DROP TABLE t1,t2,t3,t4;
|
|
# end of 10.1 tests
|
|
#
|
|
# MDEV-25362: name resolution for subqueries in ON expressions
|
|
#
|
|
create table t1 (a int, b int);
|
|
create table t2 (c int, d int);
|
|
create table t3 (e int, f int);
|
|
create table t4 (g int, h int);
|
|
explain
|
|
select *
|
|
from
|
|
t1 left join
|
|
(t2
|
|
join
|
|
t3 on
|
|
(t3.f=t1.a)
|
|
) on (t2.c=t1.a );
|
|
ERROR 42S22: Unknown column 't1.a' in 'ON'
|
|
explain
|
|
select *
|
|
from
|
|
t1 left join
|
|
(t2
|
|
join
|
|
t3 on
|
|
(t3.f=(select max(g) from t4 where t4.h=t1.a))
|
|
) on (t2.c=t1.a );
|
|
ERROR 42S22: Unknown column 't1.a' in 'WHERE'
|
|
drop table t1,t2,t3,t4;
|
|
create table t1 (a int);
|
|
insert into t1 values (1),(2);
|
|
create table t2 (b int);
|
|
insert into t2 values (1),(2);
|
|
create table t3 (c int);
|
|
insert into t3 values (1),(2);
|
|
select * from ( select * from t1 left join t2
|
|
on b in (select x from t3 as sq1)
|
|
) as sq2;
|
|
ERROR 42S22: Unknown column 'x' in 'SELECT'
|
|
drop table t1,t2,t3;
|
|
# end of 10.2 tests
|
|
#
|
|
# MDEV-22866: Crash in join optimizer with constant outer join nest
|
|
#
|
|
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES (3),(4);
|
|
CREATE TABLE t3 (c INT, KEY(c)) ENGINE=MyISAM;
|
|
CREATE TABLE t4 (d INT, KEY(d)) ENGINE=MyISAM;
|
|
INSERT INTO t4 VALUES (5),(6);
|
|
CREATE TABLE t5 (e INT) ENGINE=MyISAM;
|
|
INSERT INTO t5 VALUES (7),(8);
|
|
CREATE TABLE t6 (f INT) ENGINE=MyISAM;
|
|
INSERT INTO t6 VALUES (9),(10);
|
|
SELECT *
|
|
FROM
|
|
t1
|
|
LEFT JOIN (
|
|
t2 LEFT JOIN (
|
|
t3 JOIN
|
|
t4 ON t3.c = t4.d and t3.c >2 and t3.c<0
|
|
) ON t2.b >= t4.d
|
|
) ON t1.a <= t2.b
|
|
LEFT JOIN t5 ON t2.b = t5.e
|
|
LEFT JOIN t6 ON t3.c = t6.f;
|
|
a b c d e f
|
|
1 3 NULL NULL NULL NULL
|
|
2 3 NULL NULL NULL NULL
|
|
1 4 NULL NULL NULL NULL
|
|
2 4 NULL NULL NULL NULL
|
|
drop table t1,t2,t3,t4,t5,t6;
|
|
#
|
|
# MDEV-17518: Range optimization doesn't use ON expressions from nested outer joins
|
|
#
|
|
create table t1(a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2(a int);
|
|
insert into t2 values (0),(1);
|
|
create table t3 (a int, b int, key(a));
|
|
insert into t3 select A.a + B.a* 10 + C.a * 100, 12345 from t1 A, t1 B, t1 C;
|
|
# Uses range for table t3:
|
|
explain select * from t1 left join t3 on t1.a=t3.b and t3.a<5;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
|
|
1 SIMPLE t3 hash_range a #hash#$hj:a 5:5 test.t1.a 5 Using where; Rowid-ordered scan; Using join buffer (flat, BNLH join)
|
|
# This must use range for table t3, too:
|
|
explain select * from t1 left join (t3 join t2) on t1.a=t3.b and t3.a<5;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
|
1 SIMPLE t3 hash_range a #hash#$hj:a 5:5 test.t1.a 5 Using where; Rowid-ordered scan; Using join buffer (incremental, BNLH join)
|
|
#
|
|
# .. part 2: make sure condition selectivity can use the condition too.
|
|
#
|
|
alter table t3 drop key a;
|
|
set @tmp1=@@optimizer_use_condition_selectivity;
|
|
set @tmp2=@@use_stat_tables;
|
|
set @tmp3=@@histogram_size;
|
|
set use_stat_tables=preferably;
|
|
set optimizer_use_condition_selectivity=4;
|
|
set histogram_size=100;
|
|
analyze table t3 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status OK
|
|
# t3.filtered is less than 100%:
|
|
explain extended select * from t1 left join t3 on t1.a=t3.b and t3.a<5;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 100.00
|
|
1 SIMPLE t3 hash_ALL NULL #hash#$hj 5 test.t1.a 1000 0.50 Using where; Using join buffer (flat, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5 and `test`.`t1`.`a` is not null) where 1
|
|
# t3.filtered must less than 100%, too:
|
|
explain extended select * from t1 left join (t3 join t2) on t1.a=t3.b and t3.a<5;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 100.00
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
|
|
1 SIMPLE t3 hash_ALL NULL #hash#$hj 5 test.t1.a 1000 0.50 Using where; Using join buffer (incremental, BNLH join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t3` join `test`.`t2`) on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5 and `test`.`t1`.`a` is not null) where 1
|
|
drop table t1,t2,t3;
|
|
set optimizer_use_condition_selectivity= @tmp1;
|
|
set use_stat_tables= @tmp2;
|
|
set histogram_size= @tmp3;
|
|
# Another test
|
|
CREATE TABLE t1 (i1 int) ;
|
|
CREATE TABLE t2 (pk int NOT NULL PRIMARY KEY) ;
|
|
CREATE TABLE t3 (pk int NOT NULL, i1 int, PRIMARY KEY (pk)) ;
|
|
INSERT INTO t3 VALUES (2, NULL);
|
|
CREATE TABLE t4 (pk int NOT NULL, i1 int, PRIMARY KEY (pk), KEY i1 (i1)) ;
|
|
CREATE VIEW v4 AS SELECT * FROM t4;
|
|
SELECT 1
|
|
FROM t3 RIGHT JOIN t1 ON t3.i1 = t1.i1
|
|
LEFT JOIN v4
|
|
RIGHT JOIN t2 ON v4.i1 = t2.pk ON t1.i1 = t2.pk
|
|
WHERE t3.pk IN (2);
|
|
1
|
|
drop view v4;
|
|
drop table t1,t2,t3,t4;
|
|
#
|
|
# MDEV-28602 Wrong result with outer join, merged derived table and view
|
|
#
|
|
create table t1 (
|
|
Election int(10) unsigned NOT NULL
|
|
);
|
|
insert into t1 (Election) values (1);
|
|
create table t2 (
|
|
VoteID int(10),
|
|
ElectionID int(10),
|
|
UserID int(10)
|
|
);
|
|
insert into t2 (ElectionID, UserID) values (2, 30), (3, 30);
|
|
create view v1 as select * from t1
|
|
left join ( select 'Y' AS Voted, ElectionID from t2 ) AS T
|
|
on T.ElectionID = t1.Election
|
|
limit 9;
|
|
select * from v1;
|
|
Election Voted ElectionID
|
|
1 NULL NULL
|
|
drop table t1, t2;
|
|
drop view v1;
|
|
#
|
|
# and another contrived example showing a bit of heirarchy
|
|
#
|
|
create table t10 (a int);
|
|
create table t20 (b int);
|
|
insert into t10 values (1),(2);
|
|
insert into t20 values (1),(3);
|
|
create view v10 as select *, 'U' as u from t10 left join (select 'Y' as y, t20.b from t20) dt1 on t10.a= dt1.b limit 3;
|
|
create table t30 (c int);
|
|
insert into t30 values (1),(3);
|
|
create view v20 as select * from t30 left join (select 'X' as x, v10.u, v10.y, v10.b from v10) dt2 on t30.c=dt2.b limit 6;
|
|
select * from v20 limit 9;
|
|
c x u y b
|
|
1 X U Y 1
|
|
3 NULL NULL NULL NULL
|
|
drop view v10, v20;
|
|
drop table t10, t20, t30;
|
|
#
|
|
# More complex testcase
|
|
#
|
|
create table t2 (b int);
|
|
insert into t2 values (3),(7),(1);
|
|
create table t3 (c int);
|
|
insert into t3 values (3),(1);
|
|
create table t1 (a int);
|
|
insert into t1 values (1),(2),(7),(1);
|
|
select * from
|
|
(
|
|
select * from
|
|
(select 'Z' as z, t1.a from t1) dt1
|
|
left join
|
|
(select 'Y' as y, t2.b from t2) dt2
|
|
left join
|
|
(select 'X' as x, t3.c from t3) dt3
|
|
on dt2.b=dt3.c
|
|
on dt1.a=dt2.b
|
|
limit 9
|
|
) dt;
|
|
z a y b x c
|
|
Z 1 Y 1 X 1
|
|
Z 1 Y 1 X 1
|
|
Z 7 Y 7 NULL NULL
|
|
Z 2 NULL NULL NULL NULL
|
|
create view v3(x,c) as select * from (select 'X' as x, t3.c from t3) dt3;
|
|
create view v2(y,b) as select * from (select 'Y' as y, t2.b from t2) dt2;
|
|
create view v0(y,b,x,c) as select * from v2 left join v3 on v2.b=v3.c;
|
|
create view v1 as select 'Z' as z, t1.a, v0.* from t1 left join v0 on t1.a=v0.b limit 9;
|
|
select * from v1;
|
|
z a y b x c
|
|
Z 1 Y 1 X 1
|
|
Z 1 Y 1 X 1
|
|
Z 7 Y 7 NULL NULL
|
|
Z 2 NULL NULL NULL NULL
|
|
set statement join_cache_level=0 for
|
|
select * from v1;
|
|
z a y b x c
|
|
Z 1 Y 1 X 1
|
|
Z 2 NULL NULL NULL NULL
|
|
Z 7 Y 7 NULL NULL
|
|
Z 1 Y 1 X 1
|
|
drop view v0, v1, v2, v3;
|
|
drop table t1, t2, t3;
|
|
# end of 10.3 tests
|
|
SET optimizer_switch=@org_optimizer_switch;
|