mirror of
https://github.com/MariaDB/server.git
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1547 lines
56 KiB
Text
1547 lines
56 KiB
Text
drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22;
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set join_cache_level=1;
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drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22;
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set optimizer_switch='semijoin=on,firstmatch=on,loosescan=on,semijoin_with_cache=on';
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create table t1 (oref int, grp int, ie int) ;
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insert into t1 (oref, grp, ie) values
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(1, 1, 1),
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(1, 1, 1),
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(1, 2, NULL),
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(2, 1, 3),
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(3, 1, 4),
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(3, 2, NULL);
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create table t2 (oref int, a int);
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insert into t2 values
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(1, 1),
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(2, 2),
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(3, 3),
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(4, NULL),
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(2, NULL);
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select a, oref, a in (select max(ie)
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from t1 where oref=t2.oref group by grp) Z from t2;
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a oref Z
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1 1 1
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2 2 0
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3 3 NULL
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NULL 4 0
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NULL 2 NULL
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explain extended
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select a, oref, a in (select max(ie)
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from t1 where oref=t2.oref group by grp) Z from t2;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00
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2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary
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Warnings:
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Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select max(`test`.`t1`.`ie`) from `test`.`t1` where `test`.`t1`.`oref` = `test`.`t2`.`oref` group by `test`.`t1`.`grp` having trigcond(<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `Z` from `test`.`t2`
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explain extended
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select a, oref from t2
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where a in (select max(ie) from t1 where oref=t2.oref group by grp);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
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2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary
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Warnings:
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Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select max(`test`.`t1`.`ie`) from `test`.`t1` where `test`.`t1`.`oref` = `test`.`t2`.`oref` group by `test`.`t1`.`grp` having <cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))
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select a, oref, a in (
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select max(ie) from t1 where oref=t2.oref group by grp union
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select max(ie) from t1 where oref=t2.oref group by grp
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) Z from t2;
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a oref Z
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1 1 1
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2 2 0
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3 3 NULL
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NULL 4 0
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NULL 2 NULL
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create table t3 (a int);
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insert into t3 values (NULL), (NULL);
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flush status;
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select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
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a in (select max(ie) from t1 where oref=4 group by grp)
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0
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0
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show status like 'Handler_read_rnd_next';
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Variable_name Value
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Handler_read_rnd_next 11
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select ' ^ This must show 11' Z;
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Z
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^ This must show 11
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set @save_optimizer_switch=@@optimizer_switch;
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set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
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explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00
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2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary
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Warnings:
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Note 1003 /* select#1 */ select <expr_cache><`test`.`t3`.`a`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select max(`test`.`t1`.`ie`) from `test`.`t1` where `test`.`t1`.`oref` = 4 group by `test`.`t1`.`grp` having trigcond(<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3`
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set @@optimizer_switch=@save_optimizer_switch;
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drop table t1, t2, t3;
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create table t1 (a int, oref int, key(a));
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insert into t1 values
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(1, 1),
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(1, NULL),
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(2, 3),
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(2, NULL),
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(3, NULL);
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insert into t1 values (5, 7), (8, 9), (4, 1);
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create table t2 (a int, oref int);
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insert into t2 values (1, 1), (2,2), (NULL, 3), (NULL, 4);
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select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
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oref a Z
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1 1 1
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2 2 0
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3 NULL NULL
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4 NULL 0
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explain extended
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select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 4 100.00
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2 DEPENDENT SUBQUERY t1 ALL a NULL NULL NULL 8 100.00 Using where
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Warnings:
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Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` where `test`.`t1`.`oref` = `test`.`t2`.`oref` and trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null)))) AS `Z` from `test`.`t2`
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flush status;
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select oref, a from t2 where a in (select a from t1 where oref=t2.oref);
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oref a
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1 1
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show status like '%Handler_read_rnd_next';
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Variable_name Value
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Handler_read_rnd_next 5
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delete from t2;
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insert into t2 values (NULL, 0),(NULL, 0), (NULL, 0), (NULL, 0);
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set optimizer_switch='subquery_cache=off';
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flush status;
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select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
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oref a Z
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0 NULL 0
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0 NULL 0
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0 NULL 0
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0 NULL 0
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show status like '%Handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 0
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_retry 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 41
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select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z;
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Z
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No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.
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set @@optimizer_switch=@save_optimizer_switch;
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drop table t1, t2;
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create table t1 (a int, b int, primary key (a));
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insert into t1 values (1,1), (3,1),(100,1);
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create table t2 (a int, b int);
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insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
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select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
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a b Z
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1 1 1
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2 1 0
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NULL 1 NULL
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NULL 0 0
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drop table t1, t2;
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create table t1 (a int, b int, key(a));
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insert into t1 values
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(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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create table t2 like t1;
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insert into t2 select * from t1;
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update t2 set b=1;
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create table t3 (a int, oref int);
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insert into t3 values (1, 1), (NULL,1), (NULL,0);
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select a, oref,
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t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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from t3;
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a oref Z
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1 1 1
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NULL 1 NULL
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NULL 0 0
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explain extended
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select a, oref,
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t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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from t3;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
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2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 4 100.00 Using where; Full scan on NULL key
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2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where
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Warnings:
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Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`b` and `test`.`t2`.`b` = `test`.`t3`.`oref` and trigcond(<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null)))) AS `Z` from `test`.`t3`
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drop table t1, t2, t3;
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create table t1 (a int NOT NULL, b int NOT NULL, key(a));
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insert into t1 values
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(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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create table t2 like t1;
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insert into t2 select * from t1;
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update t2 set b=1;
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create table t3 (a int, oref int);
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insert into t3 values (1, 1), (NULL,1), (NULL,0);
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select a, oref,
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t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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from t3;
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a oref Z
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1 1 1
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NULL 1 NULL
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NULL 0 0
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This must show a trig_cond:
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explain extended
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select a, oref,
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t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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from t3;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
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2 DEPENDENT SUBQUERY t1 ref a a 4 func 2 100.00 Using where; Full scan on NULL key
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2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where
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Warnings:
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Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`b` and `test`.`t2`.`b` = `test`.`t3`.`oref` and trigcond(<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`)))) AS `Z` from `test`.`t3`
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drop table t1,t2,t3;
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create table t1 (oref int, grp int);
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insert into t1 (oref, grp) values
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(1, 1),
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(1, 1);
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create table t2 (oref int, a int);
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insert into t2 values
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(1, NULL),
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(2, NULL);
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select a, oref,
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a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
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a oref Z
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NULL 1 NULL
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NULL 2 0
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This must show a trig_cond:
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explain extended
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select a, oref,
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a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
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2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary
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Warnings:
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Note 1276 Field or reference 't2.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select count(0) from `test`.`t1` group by `test`.`t1`.`grp` having `test`.`t1`.`grp` = `test`.`t2`.`oref` and trigcond(<cache>(`test`.`t2`.`a`) = <ref_null_helper>(count(0)))))) AS `Z` from `test`.`t2`
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drop table t1, t2;
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create table t1 (a int, b int, primary key (a));
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insert into t1 values (1,1), (3,1),(100,1);
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create table t2 (a int, b int);
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insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
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select a,b, a in (select a from t1 where t1.b = t2.b union select a from
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t1 where t1.b = t2.b) Z from t2 ;
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a b Z
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1 1 1
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2 1 0
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NULL 1 NULL
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NULL 0 0
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select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
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a b Z
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1 1 1
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2 1 0
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NULL 1 NULL
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NULL 0 0
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drop table t1, t2;
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create table t3 (a int);
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insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t2 (a int, b int, oref int);
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insert into t2 values (NULL,1, 100), (NULL,2, 100);
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create table t1 (a int, b int, c int, key(a,b));
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insert into t1 select 2*A, 2*A, 100 from t3;
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explain extended select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
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2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 2 100.00 Using where; Full scan on NULL key
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Warnings:
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Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where `test`.`t1`.`c` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b` or `test`.`t1`.`b` is null)) having trigcond(`test`.`t1`.`a` is null) and trigcond(`test`.`t1`.`b` is null))))) AS `Z` from `test`.`t2`
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select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
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a b oref Z
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NULL 1 100 0
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NULL 2 100 NULL
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create table t4 (x int);
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insert into t4 select A.a + 10*B.a from t1 A, t1 B;
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explain extended
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select a,b, oref,
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(a,b) in (select a,b from t1,t4 where c=t2.oref) Z
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from t2;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
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2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 2 100.00 Using where; Full scan on NULL key
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2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(/* select#2 */ select `test`.`t1`.`a`,`test`.`t1`.`b` from `test`.`t1` join `test`.`t4` where `test`.`t1`.`c` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b` or `test`.`t1`.`b` is null)) having trigcond(`test`.`t1`.`a` is null) and trigcond(`test`.`t1`.`b` is null)))) AS `Z` from `test`.`t2`
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select a,b, oref,
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(a,b) in (select a,b from t1,t4 where c=t2.oref) Z
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from t2;
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a b oref Z
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NULL 1 100 0
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NULL 2 100 NULL
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drop table t1,t2,t3,t4;
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create table t1 (oref char(4), grp int, ie1 int, ie2 int);
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insert into t1 (oref, grp, ie1, ie2) values
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('aa', 10, 2, 1),
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('aa', 10, 1, 1),
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('aa', 20, 2, 1),
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('bb', 10, 3, 1),
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('cc', 10, 4, 2),
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('cc', 20, 3, 2),
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('ee', 10, 2, 1),
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('ee', 10, 1, 2),
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('ff', 20, 2, 2),
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('ff', 20, 1, 2);
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create table t2 (oref char(4), a int, b int);
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insert into t2 values
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('ee', NULL, 1),
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('bb', 2, 1),
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('ff', 2, 2),
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('cc', 3, NULL),
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('bb', NULL, NULL),
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('aa', 1, 1),
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('dd', 1, NULL);
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alter table t1 add index idx(ie1,ie2);
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select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=3 and b is null ;
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oref a b Z
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cc 3 NULL NULL
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insert into t2 values ('new1', 10,10);
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insert into t1 values ('new1', 1234, 10, NULL);
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select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10 and b=10;
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oref a b Z
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new1 10 10 NULL
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explain extended
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select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10 and b=10;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 8 100.00 Using where
|
|
2 DEPENDENT SUBQUERY t1 index_subquery idx idx 5 func 4 100.00 Using where; Full scan on NULL key
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on idx checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`ie1` or `test`.`t1`.`ie1` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`ie2` or `test`.`t1`.`ie2` is null)) having trigcond(`test`.`t1`.`ie1` is null) and trigcond(`test`.`t1`.`ie2` is null))))) AS `Z` from `test`.`t2` where `test`.`t2`.`a` = 10 and `test`.`t2`.`b` = 10
|
|
drop table t1, t2;
|
|
create table t1 (oref char(4), grp int, ie int);
|
|
insert into t1 (oref, grp, ie) values
|
|
('aa', 10, 2),
|
|
('aa', 10, 1),
|
|
('aa', 20, NULL),
|
|
('bb', 10, 3),
|
|
('cc', 10, 4),
|
|
('cc', 20, NULL),
|
|
('ee', 10, NULL),
|
|
('ee', 10, NULL),
|
|
('ff', 20, 2),
|
|
('ff', 20, 1);
|
|
create table t2 (oref char(4), a int);
|
|
insert into t2 values
|
|
('ee', NULL),
|
|
('bb', 2),
|
|
('ff', 2),
|
|
('cc', 3),
|
|
('aa', 1),
|
|
('dd', NULL),
|
|
('bb', NULL);
|
|
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
oref a Z
|
|
ee NULL NULL
|
|
bb 2 0
|
|
ff 2 1
|
|
cc 3 NULL
|
|
aa 1 1
|
|
dd NULL 0
|
|
bb NULL NULL
|
|
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
aa 1
|
|
ff 2
|
|
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
bb 2
|
|
dd NULL
|
|
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
|
|
oref a Z
|
|
ee NULL NULL
|
|
bb 2 0
|
|
ff 2 0
|
|
cc 3 NULL
|
|
aa 1 1
|
|
dd NULL 0
|
|
bb NULL NULL
|
|
select oref, a from t2 where
|
|
a in (select min(ie) from t1 where oref=t2.oref group by grp);
|
|
oref a
|
|
aa 1
|
|
select oref, a from t2 where
|
|
a not in (select min(ie) from t1 where oref=t2.oref group by grp);
|
|
oref a
|
|
bb 2
|
|
ff 2
|
|
dd NULL
|
|
update t1 set ie=3 where oref='ff' and ie=1;
|
|
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by
|
|
grp) Z from t2;
|
|
oref a Z
|
|
ee NULL NULL
|
|
bb 2 0
|
|
ff 2 1
|
|
cc 3 NULL
|
|
aa 1 1
|
|
dd NULL 0
|
|
bb NULL NULL
|
|
select oref, a from t2 where a in (select min(ie) from t1 where
|
|
oref=t2.oref group by grp);
|
|
oref a
|
|
ff 2
|
|
aa 1
|
|
select oref, a from t2 where a not in (select min(ie) from t1 where
|
|
oref=t2.oref group by grp);
|
|
oref a
|
|
bb 2
|
|
dd NULL
|
|
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by
|
|
grp having min(ie) > 1) Z from t2;
|
|
oref a Z
|
|
ee NULL 0
|
|
bb 2 0
|
|
ff 2 1
|
|
cc 3 0
|
|
aa 1 0
|
|
dd NULL 0
|
|
bb NULL NULL
|
|
select oref, a from t2 where a in (select min(ie) from t1 where
|
|
oref=t2.oref group by grp having min(ie) > 1);
|
|
oref a
|
|
ff 2
|
|
select oref, a from t2 where a not in (select min(ie) from t1 where
|
|
oref=t2.oref group by grp having min(ie) > 1);
|
|
oref a
|
|
ee NULL
|
|
bb 2
|
|
cc 3
|
|
aa 1
|
|
dd NULL
|
|
alter table t1 add index idx(ie);
|
|
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
2 DEPENDENT SUBQUERY t1 index_subquery idx idx 5 func 4 Using where; Full scan on NULL key
|
|
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
oref a Z
|
|
ee NULL NULL
|
|
bb 2 0
|
|
ff 2 1
|
|
cc 3 NULL
|
|
aa 1 1
|
|
dd NULL 0
|
|
bb NULL NULL
|
|
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
ff 2
|
|
aa 1
|
|
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
bb 2
|
|
dd NULL
|
|
alter table t1 drop index idx;
|
|
alter table t1 add index idx(oref,ie);
|
|
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
2 DEPENDENT SUBQUERY t1 ref_or_null idx idx 10 test.t2.oref,func 4 Using where; Using index; Full scan on NULL key
|
|
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
oref a Z
|
|
ee NULL NULL
|
|
bb 2 0
|
|
ff 2 1
|
|
cc 3 NULL
|
|
aa 1 1
|
|
dd NULL 0
|
|
bb NULL NULL
|
|
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
ff 2
|
|
aa 1
|
|
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
bb 2
|
|
dd NULL
|
|
explain
|
|
select oref, a,
|
|
a in (select min(ie) from t1 where oref=t2.oref
|
|
group by grp having min(ie) > 1) Z
|
|
from t2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
2 DEPENDENT SUBQUERY t1 ref idx idx 5 test.t2.oref 2 Using where; Using temporary
|
|
select oref, a,
|
|
a in (select min(ie) from t1 where oref=t2.oref
|
|
group by grp having min(ie) > 1) Z
|
|
from t2;
|
|
oref a Z
|
|
ee NULL 0
|
|
bb 2 0
|
|
ff 2 1
|
|
cc 3 0
|
|
aa 1 0
|
|
dd NULL 0
|
|
bb NULL NULL
|
|
select oref, a from t2 where a in (select min(ie) from t1 where oref=t2.oref
|
|
group by grp having min(ie) > 1);
|
|
oref a
|
|
ff 2
|
|
select oref, a from t2 where a not in (select min(ie) from t1 where oref=t2.oref
|
|
group by grp having min(ie) > 1);
|
|
oref a
|
|
ee NULL
|
|
bb 2
|
|
cc 3
|
|
aa 1
|
|
dd NULL
|
|
drop table t1,t2;
|
|
create table t1 (oref char(4), grp int, ie1 int, ie2 int);
|
|
insert into t1 (oref, grp, ie1, ie2) values
|
|
('aa', 10, 2, 1),
|
|
('aa', 10, 1, 1),
|
|
('aa', 20, 2, 1),
|
|
('bb', 10, 3, 1),
|
|
('cc', 10, 4, 2),
|
|
('cc', 20, 3, 2),
|
|
('ee', 10, 2, 1),
|
|
('ee', 10, 1, 2),
|
|
('ff', 20, 2, 2),
|
|
('ff', 20, 1, 2);
|
|
create table t2 (oref char(4), a int, b int);
|
|
insert into t2 values
|
|
('ee', NULL, 1),
|
|
('bb', 2, 1),
|
|
('ff', 2, 2),
|
|
('cc', 3, NULL),
|
|
('bb', NULL, NULL),
|
|
('aa', 1, 1),
|
|
('dd', 1, NULL);
|
|
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
|
oref a b Z
|
|
ee NULL 1 NULL
|
|
bb 2 1 0
|
|
ff 2 2 1
|
|
cc 3 NULL NULL
|
|
bb NULL NULL NULL
|
|
aa 1 1 1
|
|
dd 1 NULL 0
|
|
select oref, a, b from t2 where (a,b) in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
oref a b
|
|
aa 1 1
|
|
ff 2 2
|
|
select oref, a, b from t2 where (a,b) not in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
oref a b
|
|
bb 2 1
|
|
dd 1 NULL
|
|
select oref, a, b,
|
|
(a,b) in (select min(ie1),max(ie2) from t1
|
|
where oref=t2.oref group by grp) Z
|
|
from t2;
|
|
oref a b Z
|
|
ee NULL 1 0
|
|
bb 2 1 0
|
|
ff 2 2 0
|
|
cc 3 NULL NULL
|
|
bb NULL NULL NULL
|
|
aa 1 1 1
|
|
dd 1 NULL 0
|
|
select oref, a, b from t2 where
|
|
(a,b) in (select min(ie1), max(ie2) from t1 where oref=t2.oref group by grp);
|
|
oref a b
|
|
aa 1 1
|
|
select oref, a, b from t2 where
|
|
(a,b) not in (select min(ie1), max(ie2) from t1 where oref=t2.oref group by grp);
|
|
oref a b
|
|
ee NULL 1
|
|
bb 2 1
|
|
ff 2 2
|
|
dd 1 NULL
|
|
alter table t1 add index idx(ie1,ie2);
|
|
explain select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
2 DEPENDENT SUBQUERY t1 index_subquery idx idx 5 func 4 Using where; Full scan on NULL key
|
|
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
|
oref a b Z
|
|
ee NULL 1 NULL
|
|
bb 2 1 0
|
|
ff 2 2 1
|
|
cc 3 NULL NULL
|
|
bb NULL NULL NULL
|
|
aa 1 1 1
|
|
dd 1 NULL 0
|
|
select oref, a, b from t2 where (a,b) in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
oref a b
|
|
ff 2 2
|
|
aa 1 1
|
|
select oref, a, b from t2 where (a,b) not in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
oref a b
|
|
bb 2 1
|
|
dd 1 NULL
|
|
explain extended
|
|
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 7 100.00
|
|
2 DEPENDENT SUBQUERY t1 index_subquery idx idx 5 func 4 100.00 Using where; Full scan on NULL key
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`b`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on idx checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` and trigcond(trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`ie1` or `test`.`t1`.`ie1` is null)) and trigcond(trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`ie2` or `test`.`t1`.`ie2` is null)) having trigcond(`test`.`t1`.`ie1` is null) and trigcond(`test`.`t1`.`ie2` is null))))) AS `Z` from `test`.`t2`
|
|
drop table t1,t2;
|
|
create table t1 (oref char(4), grp int, ie int primary key);
|
|
insert into t1 (oref, grp, ie) values
|
|
('aa', 10, 2),
|
|
('aa', 10, 1),
|
|
('bb', 10, 3),
|
|
('cc', 10, 4),
|
|
('cc', 20, 5),
|
|
('cc', 10, 6);
|
|
create table t2 (oref char(4), a int);
|
|
insert into t2 values
|
|
('ee', NULL),
|
|
('bb', 2),
|
|
('cc', 5),
|
|
('cc', 2),
|
|
('cc', NULL),
|
|
('aa', 1),
|
|
('bb', NULL);
|
|
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
2 DEPENDENT SUBQUERY t1 unique_subquery PRIMARY PRIMARY 4 func 1 Using where; Full scan on NULL key
|
|
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
oref a Z
|
|
ee NULL 0
|
|
bb 2 0
|
|
cc 5 1
|
|
cc 2 0
|
|
cc NULL NULL
|
|
aa 1 1
|
|
bb NULL NULL
|
|
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
cc 5
|
|
aa 1
|
|
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
oref a
|
|
ee NULL
|
|
bb 2
|
|
cc 2
|
|
explain
|
|
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 Using where; Using temporary
|
|
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
|
|
oref a Z
|
|
ee NULL 0
|
|
bb 2 0
|
|
cc 5 1
|
|
cc 2 0
|
|
cc NULL NULL
|
|
aa 1 1
|
|
bb NULL NULL
|
|
drop table t1,t2;
|
|
create table t1 (a int, b int);
|
|
insert into t1 values (0,0), (2,2), (3,3);
|
|
create table t2 (a int, b int);
|
|
insert into t2 values (1,1), (3,3);
|
|
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
|
|
a b Z
|
|
0 0 0
|
|
2 2 0
|
|
3 3 1
|
|
insert into t2 values (NULL,4);
|
|
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
|
|
a b Z
|
|
0 0 0
|
|
2 2 0
|
|
3 3 1
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
|
|
INSERT INTO t1 VALUES (1,1,'a'), (1,2,'b'), (1,3,'c'), (1,4,'d'), (1,5,'e'),
|
|
(2,1,'f'), (2,2,'g'), (2,3,'h'), (3,4,'i'),(3,3,'j'), (3,2,'k'), (3,1,'l'),
|
|
(1,9,'m');
|
|
CREATE TABLE t2 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
|
|
INSERT INTO t2 SELECT * FROM t1;
|
|
SELECT a, MAX(b), (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b))
|
|
as test FROM t1 GROUP BY a;
|
|
a MAX(b) test
|
|
1 9 m
|
|
2 3 h
|
|
3 4 i
|
|
SELECT * FROM t1 GROUP by t1.a
|
|
HAVING (MAX(t1.b) > (SELECT MAX(t2.b) FROM t2 WHERE t2.c < t1.c
|
|
HAVING MAX(t2.b+t1.a) < 10));
|
|
a b c
|
|
SELECT a,b,c FROM t1 WHERE b in (9,3,4) ORDER BY b,c;
|
|
a b c
|
|
1 3 c
|
|
2 3 h
|
|
3 3 j
|
|
1 4 d
|
|
3 4 i
|
|
1 9 m
|
|
SELECT a, MAX(b),
|
|
(SELECT COUNT(DISTINCT t.c) FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b)
|
|
LIMIT 1)
|
|
as cnt,
|
|
(SELECT t.b FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1)
|
|
as t_b,
|
|
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1)
|
|
as t_b,
|
|
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) ORDER BY t.c LIMIT 1)
|
|
as t_b
|
|
FROM t1 GROUP BY a;
|
|
a MAX(b) cnt t_b t_b t_b
|
|
1 9 1 9 m m
|
|
2 3 1 3 h h
|
|
3 4 1 4 i i
|
|
SELECT a, MAX(b),
|
|
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) as test
|
|
FROM t1 GROUP BY a;
|
|
a MAX(b) test
|
|
1 9 m
|
|
2 3 h
|
|
3 4 i
|
|
DROP TABLE t1, t2;
|
|
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
|
|
CREATE TABLE t1 (a int);
|
|
CREATE TABLE t2 (b int, PRIMARY KEY(b));
|
|
INSERT INTO t1 VALUES (1), (NULL), (4);
|
|
INSERT INTO t2 VALUES (3), (1),(2), (5), (4), (7), (6);
|
|
EXPLAIN EXTENDED
|
|
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
|
|
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`b` = `test`.`t1`.`a` and !<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` where trigcond(<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null))))
|
|
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1));
|
|
a
|
|
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1 WHERE a > 4));
|
|
a
|
|
1
|
|
4
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (id int);
|
|
CREATE TABLE t2 (id int PRIMARY KEY);
|
|
CREATE TABLE t3 (id int PRIMARY KEY, name varchar(10));
|
|
INSERT INTO t1 VALUES (2), (NULL), (3), (1);
|
|
INSERT INTO t2 VALUES (234), (345), (457);
|
|
INSERT INTO t3 VALUES (222,'bbb'), (333,'ccc'), (111,'aaa');
|
|
EXPLAIN
|
|
SELECT * FROM t1
|
|
WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3
|
|
WHERE t3.name='xxx' AND t2.id=t3.id);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
|
2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Using index; Full scan on NULL key
|
|
2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 test.t2.id 1 Using where
|
|
SELECT * FROM t1
|
|
WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3
|
|
WHERE t3.name='xxx' AND t2.id=t3.id);
|
|
id
|
|
2
|
|
NULL
|
|
3
|
|
1
|
|
SELECT (t1.id IN (SELECT t2.id FROM t2,t3
|
|
WHERE t3.name='xxx' AND t2.id=t3.id)) AS x
|
|
FROM t1;
|
|
x
|
|
0
|
|
0
|
|
0
|
|
0
|
|
DROP TABLE t1,t2,t3;
|
|
CREATE TABLE t1 (a INT NOT NULL);
|
|
INSERT INTO t1 VALUES (1),(-1), (65),(66);
|
|
CREATE TABLE t2 (a INT UNSIGNED NOT NULL PRIMARY KEY);
|
|
INSERT INTO t2 VALUES (65),(66);
|
|
SELECT a FROM t1 WHERE a NOT IN (65,66);
|
|
a
|
|
1
|
|
-1
|
|
SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2);
|
|
a
|
|
1
|
|
-1
|
|
EXPLAIN SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
|
2 DEPENDENT SUBQUERY t2 unique_subquery PRIMARY PRIMARY 4 func 1 Using index; Using where
|
|
DROP TABLE t1, t2;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES(1);
|
|
CREATE TABLE t2 (placeholder CHAR(11));
|
|
INSERT INTO t2 VALUES("placeholder");
|
|
SELECT ROW(1, 2) IN (SELECT t1.a, 2) FROM t1 GROUP BY t1.a;
|
|
ROW(1, 2) IN (SELECT t1.a, 2)
|
|
1
|
|
SELECT ROW(1, 2) IN (SELECT t1.a, 2 FROM t2) FROM t1 GROUP BY t1.a;
|
|
ROW(1, 2) IN (SELECT t1.a, 2 FROM t2)
|
|
1
|
|
DROP TABLE t1, t2;
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1),(2),(3);
|
|
CREATE TABLE t2 SELECT * FROM t1;
|
|
SELECT 1 FROM t1 WHERE t1.a NOT IN (SELECT 1 FROM t1, t2 WHERE 0);
|
|
1
|
|
1
|
|
1
|
|
1
|
|
DROP TABLE t1, t2;
|
|
create table t1 (a int, b decimal(13, 3));
|
|
insert into t1 values (1, 0.123);
|
|
select a, (select max(b) from t1) into outfile "../../tmp/subselect.out.file.1" from t1;
|
|
delete from t1;
|
|
load data infile "../../tmp/subselect.out.file.1" into table t1;
|
|
select * from t1;
|
|
a b
|
|
1 0.123
|
|
drop table t1;
|
|
CREATE TABLE t1 (
|
|
pk INT PRIMARY KEY,
|
|
int_key INT,
|
|
varchar_key VARCHAR(5) UNIQUE,
|
|
varchar_nokey VARCHAR(5)
|
|
);
|
|
INSERT INTO t1 VALUES (9, 7,NULL,NULL), (10,8,'p' ,'p');
|
|
SELECT varchar_nokey
|
|
FROM t1
|
|
WHERE NULL NOT IN (
|
|
SELECT INNR.pk FROM t1 AS INNR2
|
|
LEFT JOIN t1 AS INNR ON ( INNR2.int_key = INNR.int_key )
|
|
WHERE INNR.varchar_key > 'n{'
|
|
);
|
|
varchar_nokey
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1), (2), (11);
|
|
# 2nd and 3rd columns should be same
|
|
SELECT a, ROW(11, 12) = (SELECT a, 22), ROW(11, 12) IN (SELECT a, 22) FROM t1 GROUP BY t1.a;
|
|
a ROW(11, 12) = (SELECT a, 22) ROW(11, 12) IN (SELECT a, 22)
|
|
1 0 0
|
|
2 0 0
|
|
11 0 0
|
|
SELECT a, ROW(11, 12) = (SELECT a, 12), ROW(11, 12) IN (SELECT a, 12) FROM t1 GROUP BY t1.a;
|
|
a ROW(11, 12) = (SELECT a, 12) ROW(11, 12) IN (SELECT a, 12)
|
|
1 0 0
|
|
2 0 0
|
|
11 1 1
|
|
SELECT a, ROW(11, 12) = (SELECT a, 22), ROW(11, 12) IN (SELECT a, 22) FROM t1;
|
|
a ROW(11, 12) = (SELECT a, 22) ROW(11, 12) IN (SELECT a, 22)
|
|
1 0 0
|
|
2 0 0
|
|
11 0 0
|
|
SELECT a, ROW(11, 12) = (SELECT a, 12), ROW(11, 12) IN (SELECT a, 12) FROM t1;
|
|
a ROW(11, 12) = (SELECT a, 12) ROW(11, 12) IN (SELECT a, 12)
|
|
1 0 0
|
|
2 0 0
|
|
11 1 1
|
|
SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 22), ROW(11, 12) IN (SELECT MAX(x), 22) FROM t1;
|
|
x ROW(11, 12) = (SELECT MAX(x), 22) ROW(11, 12) IN (SELECT MAX(x), 22)
|
|
1 0 0
|
|
2 0 0
|
|
11 0 0
|
|
# 2nd and 3rd columns should be same
|
|
EXPLAIN SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
|
3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1;
|
|
x ROW(11, 12) = (SELECT MAX(x), 12) ROW(11, 12) IN (SELECT MAX(x), 12)
|
|
1 0 0
|
|
2 0 0
|
|
11 1 1
|
|
DROP TABLE t1;
|
|
# both columns should be same
|
|
SELECT ROW(1,2) = (SELECT NULL, NULL), ROW(1,2) IN (SELECT NULL, NULL);
|
|
ROW(1,2) = (SELECT NULL, NULL) ROW(1,2) IN (SELECT NULL, NULL)
|
|
NULL NULL
|
|
SELECT ROW(1,2) = (SELECT 1, NULL), ROW(1,2) IN (SELECT 1, NULL);
|
|
ROW(1,2) = (SELECT 1, NULL) ROW(1,2) IN (SELECT 1, NULL)
|
|
NULL NULL
|
|
SELECT ROW(1,2) = (SELECT NULL, 2), ROW(1,2) IN (SELECT NULL, 2);
|
|
ROW(1,2) = (SELECT NULL, 2) ROW(1,2) IN (SELECT NULL, 2)
|
|
NULL NULL
|
|
SELECT ROW(1,2) = (SELECT NULL, 1), ROW(1,2) IN (SELECT NULL, 1);
|
|
ROW(1,2) = (SELECT NULL, 1) ROW(1,2) IN (SELECT NULL, 1)
|
|
0 0
|
|
SELECT ROW(1,2) = (SELECT 1, 1), ROW(1,2) IN (SELECT 1, 1);
|
|
ROW(1,2) = (SELECT 1, 1) ROW(1,2) IN (SELECT 1, 1)
|
|
0 0
|
|
SELECT ROW(1,2) = (SELECT 1, 2), ROW(1,2) IN (SELECT 1, 2);
|
|
ROW(1,2) = (SELECT 1, 2) ROW(1,2) IN (SELECT 1, 2)
|
|
1 1
|
|
CREATE TABLE t1 (a INT, b INT, c INT);
|
|
INSERT INTO t1 VALUES (1,1,1), (1,1,1);
|
|
EXPLAIN EXTENDED
|
|
SELECT c FROM
|
|
( SELECT
|
|
(SELECT COUNT(a) FROM
|
|
(SELECT COUNT(b) FROM t1) AS x GROUP BY c
|
|
) FROM t1 GROUP BY b
|
|
) AS y;
|
|
ERROR 42S22: Unknown column 'c' in 'SELECT'
|
|
SHOW WARNINGS;
|
|
Level Code Message
|
|
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
|
|
Note 1981 Aggregate function 'count()' of SELECT #3 belongs to SELECT #2
|
|
Note 1276 Field or reference 'test.t1.c' of SELECT #3 was resolved in SELECT #2
|
|
Error 1054 Unknown column 'c' in 'SELECT'
|
|
DROP TABLE t1;
|
|
End of 5.0 tests
|
|
#
|
|
# BUG#36896: Server crash on SELECT FROM DUAL
|
|
#
|
|
create table t1 (a int);
|
|
select 1 as res from dual where (1) in (select * from t1);
|
|
res
|
|
drop table t1;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (
|
|
a int(11) default null,
|
|
b int(11) default null,
|
|
key (a)
|
|
);
|
|
insert into t1 select A.a+10*(B.a+10*C.a),A.a+10*(B.a+10*C.a) from t0 A, t0 B, t0 C;
|
|
create table t2 (a int(11) default null);
|
|
insert into t2 values (0),(1);
|
|
create table t3 (a int(11) default null);
|
|
insert into t3 values (0),(1);
|
|
create table t4 (a int(11) default null);
|
|
insert into t4 values (0),(1);
|
|
create table t5 (a int(11) default null);
|
|
insert into t5 values (0),(1),(0),(1);
|
|
select * from t2, t3
|
|
where
|
|
t2.a < 10 and
|
|
t3.a+1 = 2 and
|
|
t3.a in (select t1.b from t1
|
|
where t1.a+1=t1.a+1 and
|
|
t1.a < (select t4.a+10
|
|
from t4, t5 limit 2));
|
|
ERROR 21000: Subquery returns more than 1 row
|
|
drop table t0, t1, t2, t3, t4, t5;
|
|
#
|
|
# BUG#48177 - SELECTs with NOT IN subqueries containing NULL
|
|
# values return too many records
|
|
#
|
|
CREATE TABLE t1 (
|
|
i1 int DEFAULT NULL,
|
|
i2 int DEFAULT NULL
|
|
) ;
|
|
INSERT INTO t1 VALUES (1, NULL);
|
|
INSERT INTO t1 VALUES (2, 3);
|
|
INSERT INTO t1 VALUES (4, NULL);
|
|
INSERT INTO t1 VALUES (4, 0);
|
|
INSERT INTO t1 VALUES (NULL, NULL);
|
|
CREATE TABLE t2 (
|
|
i1 int DEFAULT NULL,
|
|
i2 int DEFAULT NULL
|
|
) ;
|
|
INSERT INTO t2 VALUES (4, NULL);
|
|
INSERT INTO t2 VALUES (5, 0);
|
|
|
|
Data in t1
|
|
SELECT i1, i2 FROM t1;
|
|
i1 i2
|
|
1 NULL
|
|
2 3
|
|
4 NULL
|
|
4 0
|
|
NULL NULL
|
|
|
|
Data in subquery (should be filtered out)
|
|
SELECT i1, i2 FROM t2 ORDER BY i1;
|
|
i1 i2
|
|
4 NULL
|
|
5 0
|
|
FLUSH STATUS;
|
|
set @save_optimizer_switch2=@@optimizer_switch;
|
|
set optimizer_switch='subquery_cache=off';
|
|
|
|
SELECT i1, i2
|
|
FROM t1
|
|
WHERE (i1, i2)
|
|
NOT IN (SELECT i1, i2 FROM t2);
|
|
i1 i2
|
|
1 NULL
|
|
2 3
|
|
|
|
# Check that the subquery only has to be evaluated once
|
|
# for all-NULL values even though there are two (NULL,NULL) records
|
|
# Baseline:
|
|
SHOW STATUS LIKE '%Handler_read_rnd_next';
|
|
Variable_name Value
|
|
Handler_read_rnd_next 18
|
|
|
|
INSERT INTO t1 VALUES (NULL, NULL);
|
|
FLUSH STATUS;
|
|
|
|
SELECT i1, i2
|
|
FROM t1
|
|
WHERE (i1, i2)
|
|
NOT IN (SELECT i1, i2 FROM t2);
|
|
i1 i2
|
|
1 NULL
|
|
2 3
|
|
|
|
# Handler_read_rnd_next should be one more than baseline
|
|
# (read record from t1, but do not read from t2)
|
|
SHOW STATUS LIKE '%Handler_read_rnd_next';
|
|
Variable_name Value
|
|
Handler_read_rnd_next 19
|
|
set @@optimizer_switch=@save_optimizer_switch2;
|
|
DROP TABLE t1,t2;
|
|
End of 5.1 tests
|
|
CREATE TABLE t1 (
|
|
a int(11) NOT NULL,
|
|
b int(11) NOT NULL,
|
|
c datetime default NULL,
|
|
PRIMARY KEY (a),
|
|
KEY idx_bc (b,c)
|
|
);
|
|
INSERT INTO t1 VALUES
|
|
(406989,67,'2006-02-23 17:08:46'), (150078,67,'2005-10-26 11:17:45'),
|
|
(406993,67,'2006-02-27 11:20:57'), (245655,67,'2005-12-08 15:59:08'),
|
|
(406994,67,'2006-02-27 11:26:46'), (256,67,NULL),
|
|
(398341,67,'2006-02-20 04:48:44'), (254,67,NULL),(1120,67,NULL),
|
|
(406988,67,'2006-02-23 17:07:22'), (255,67,NULL),
|
|
(398340,67,'2006-02-20 04:38:53'),(406631,67,'2006-02-23 10:49:42'),
|
|
(245653,67,'2005-12-08 15:59:07'),(406992,67,'2006-02-24 16:47:18'),
|
|
(245654,67,'2005-12-08 15:59:08'),(406995,67,'2006-02-28 11:55:00'),
|
|
(127261,67,'2005-10-13 12:17:58'),(406991,67,'2006-02-24 16:42:32'),
|
|
(245652,67,'2005-12-08 15:58:27'),(398545,67,'2006-02-20 04:53:13'),
|
|
(154504,67,'2005-10-28 11:53:01'),(9199,67,NULL),(1,67,'2006-02-23 15:01:35'),
|
|
(223456,67,NULL),(4101,67,NULL),(1133,67,NULL),
|
|
(406990,67,'2006-02-23 18:01:45'),(148815,67,'2005-10-25 15:34:17'),
|
|
(148812,67,'2005-10-25 15:30:01'),(245651,67,'2005-12-08 15:58:27'),
|
|
(154503,67,'2005-10-28 11:52:38');
|
|
create table t11 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 asc;
|
|
create table t12 select * from t1 where b = 67 AND (c IS NULL OR c > NOW()) order by 3 desc;
|
|
create table t21 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 asc;
|
|
create table t22 select * from t1 where b = 67 AND (c IS NULL OR c > '2005-12-08') order by 3 desc;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
set @@optimizer_switch='materialization=off';
|
|
update t22 set c = '2005-12-08 15:58:27' where a = 255;
|
|
explain select t21.* from t21,t22 where t21.a = t22.a and
|
|
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t11 ALL NULL NULL NULL NULL 8 Using where; Start temporary; Using temporary; Using filesort
|
|
1 PRIMARY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; End temporary; Using join buffer (flat, BNL join)
|
|
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join)
|
|
select t21.* from t21,t22 where t21.a = t22.a and
|
|
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
|
|
a b c
|
|
256 67 NULL
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
drop table t1, t11, t12, t21, t22;
|
|
create table t1(a int);
|
|
insert into t1 values (0),(1);
|
|
set @@optimizer_switch='firstmatch=off,materialization=off';
|
|
explain
|
|
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY X ALL NULL NULL NULL NULL 2
|
|
2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where
|
|
2 DEPENDENT SUBQUERY Z ALL NULL NULL NULL NULL 2 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
|
|
subq
|
|
NULL
|
|
0
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
drop table t1;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 as select * from t0;
|
|
insert into t1 select a+10 from t0;
|
|
set @@optimizer_switch='firstmatch=off,materialization=off';
|
|
insert into t0 values(2);
|
|
explain select * from t1 where 2 in (select a from t0);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; Start temporary; End temporary
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
|
select * from t1 where 2 in (select a from t0);
|
|
a
|
|
0
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
6
|
|
7
|
|
8
|
|
9
|
|
10
|
|
11
|
|
12
|
|
13
|
|
14
|
|
15
|
|
16
|
|
17
|
|
18
|
|
19
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
set @@optimizer_switch='materialization=off';
|
|
explain select * from t1 where 2 in (select a from t0);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; FirstMatch
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
|
select * from t1 where 2 in (select a from t0);
|
|
a
|
|
0
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
6
|
|
7
|
|
8
|
|
9
|
|
10
|
|
11
|
|
12
|
|
13
|
|
14
|
|
15
|
|
16
|
|
17
|
|
18
|
|
19
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
set @@optimizer_switch='materialization=off';
|
|
set @tmp_optimizer_switch=@@optimizer_switch;
|
|
set optimizer_switch='derived_merge=off,derived_with_keys=off';
|
|
explain select * from (select a from t0) X where a in (select a from t1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>); Using join buffer (flat, BNL join)
|
|
2 DERIVED t0 ALL NULL NULL NULL NULL 11
|
|
drop table t0, t1;
|
|
set optimizer_switch=@tmp_optimizer_switch;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));
|
|
insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;
|
|
insert into t1 select * from t1 where kp1 < 20;
|
|
create table t3 (a int);
|
|
insert into t3 select A.a + 10*B.a from t0 A, t0 B;
|
|
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where
|
|
1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3)
|
|
create table t4 (pk int primary key);
|
|
insert into t4 select a from t3;
|
|
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
|
|
and t4.pk=t1.c);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where
|
|
1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using where
|
|
1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t3)
|
|
drop table t1, t3, t4;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
create table t1 (a int) as select * from t0 where a < 5;
|
|
set @save_max_heap_table_size=@@max_heap_table_size;
|
|
set @@optimizer_switch='firstmatch=off,materialization=off';
|
|
set @@max_heap_table_size= 16384;
|
|
explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E where a+1 < 10000 + A.a + B.a +C.a+D.a);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY A ALL NULL NULL NULL NULL 10
|
|
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
|
1 PRIMARY E ALL NULL NULL NULL NULL 5 Start temporary; Using join buffer (flat, BNL join)
|
|
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer (flat, BNL join)
|
|
flush status;
|
|
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E where a+1 < 10000 + A.a + B.a +C.a+D.a);
|
|
count(*)
|
|
5000
|
|
show status like 'Created_tmp_disk_tables';
|
|
Variable_name Value
|
|
Created_tmp_disk_tables 1
|
|
set @@max_heap_table_size=@save_max_heap_table_size;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
drop table t0, t1;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2(a int);
|
|
insert into t2 values (1),(2);
|
|
create table t3 ( a int , filler char(100), key(a));
|
|
insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
|
|
explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
|
|
1 PRIMARY t3 ref a a 5 test.t2.a 1
|
|
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using where
|
|
select * from t3 where a in (select a from t2);
|
|
a filler
|
|
1 filler
|
|
2 filler
|
|
drop table t0, t2, t3;
|
|
set @@optimizer_switch='firstmatch=off,materialization=off';
|
|
create table t1 (a date);
|
|
insert into t1 values ('2008-01-01'),('2008-01-01'),('2008-02-01'),('2008-02-01');
|
|
create table t2 (a int);
|
|
insert into t2 values (1),(2);
|
|
create table t3 (a char(10));
|
|
insert into t3 select * from t1;
|
|
insert into t3 values (1),(2);
|
|
explain select * from t2 where a in (select a from t1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
explain select * from t2 where a in (select a from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
explain select * from t2 where a in (select a from t3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
explain select * from t1 where a in (select a from t3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
drop table t1, t2, t3;
|
|
create table t1 (a decimal);
|
|
insert into t1 values (1),(2);
|
|
explain select * from t1 where a in (select a from t1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
drop table t1;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
set @@optimizer_switch='materialization=off';
|
|
create table t1 (a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2 as select * from t1;
|
|
create table t3 (a int, b int, filler char(100), key(a));
|
|
insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C;
|
|
explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Start temporary; Using join buffer (flat, BNL join)
|
|
1 PRIMARY t3 ref a a 5 test.t2.a 10 End temporary
|
|
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where
|
|
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
|
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
|
|
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
|
|
2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where
|
|
2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
|
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
|
|
2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where
|
|
2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
|
explain select straight_join * from t2 X, t2 Y
|
|
where X.a in (select straight_join A.a from t1 A, t1 B);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where
|
|
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
|
2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where
|
|
2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
|
create table t0 (a int, b int);
|
|
insert into t0 values(1,1);
|
|
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 system NULL NULL NULL NULL 1
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Start temporary
|
|
1 PRIMARY t3 ref a a 5 test.t2.a 10 End temporary
|
|
create table t4 as select a as x, a as y from t1;
|
|
explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 system NULL NULL NULL NULL 1
|
|
1 PRIMARY t4 ALL NULL NULL NULL NULL 10 Using where; Start temporary
|
|
1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; End temporary
|
|
drop table t0,t1,t2,t3,t4;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int, b int, filler char(100), key(a,b));
|
|
insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B;
|
|
create table t2 as select * from t1;
|
|
explain select * from t2 where a in (select b from t1 where a=3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where
|
|
1 PRIMARY t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2)
|
|
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where
|
|
1 PRIMARY t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2)
|
|
drop table t1,t2;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
create table t1 (a int, b int);
|
|
insert into t1 select a,a from t0;
|
|
create table t2 (a int, b int);
|
|
insert into t2 select A.a + 10*B.a, A.a + 10*B.a from t0 A, t0 B;
|
|
set @@optimizer_switch='firstmatch=off,materialization=off';
|
|
explain select * from t1 where (a,b) in (select a,b from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
set @save_optimizer_search_depth=@@optimizer_search_depth;
|
|
set @@optimizer_search_depth=63;
|
|
Warnings:
|
|
Warning 1292 Truncated incorrect optimizer_search_depth value: '63'
|
|
explain select * from t1 where (a,b) in (select a,b from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
|
|
set @@optimizer_search_depth=@save_optimizer_search_depth;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
drop table t0, t1, t2;
|
|
set @@optimizer_switch='materialization=off';
|
|
create table t0 (a decimal(4,2));
|
|
insert into t0 values (10.24), (22.11);
|
|
create table t1 as select * from t0;
|
|
insert into t1 select * from t0;
|
|
explain select * from t0 where a in (select a from t1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (flat, BNL join)
|
|
select * from t0 where a in (select a from t1);
|
|
a
|
|
10.24
|
|
22.11
|
|
drop table t0, t1;
|
|
create table t0(a date);
|
|
insert into t0 values ('2008-01-01'),('2008-02-02');
|
|
create table t1 as select * from t0;
|
|
insert into t1 select * from t0;
|
|
explain select * from t0 where a in (select a from t1);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 2
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (flat, BNL join)
|
|
select * from t0 where a in (select a from t1);
|
|
a
|
|
2008-01-01
|
|
2008-02-02
|
|
drop table t0, t1;
|
|
create table t0(a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 as select a as a, a as b, a as c from t0 where a < 3;
|
|
create table t2 as select a as a, a as b from t0 where a < 3;
|
|
insert into t2 select * from t2;
|
|
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
|
1 PRIMARY X ALL NULL NULL NULL NULL 6 Using where; Start temporary; Using join buffer (flat, BNL join)
|
|
1 PRIMARY Y ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY Z ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join)
|
|
drop table t0,t1,t2;
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
|
|
BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307
|
|
|
|
CREATE TABLE t1 (
|
|
`pk` int(11) NOT NULL AUTO_INCREMENT,
|
|
`int_key` int(11) DEFAULT NULL,
|
|
PRIMARY KEY (`pk`),
|
|
KEY `int_key` (`int_key`)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1,9),(2,3),(3,8),(4,6),(5,9),(6,5),(7,5),(8,9),(9,1),(10,10);
|
|
SELECT `pk` FROM t1 AS OUTR WHERE `int_key` = ALL (
|
|
SELECT `int_key` FROM t1 AS INNR WHERE INNR . `pk` >= 9
|
|
);
|
|
pk
|
|
DROP TABLE t1;
|
|
|
|
BUG#40118 Crash when running Batched Key Access and requiring one match for each key
|
|
|
|
create table t0(a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int, key(a));
|
|
insert into t1 select * from t0;
|
|
alter table t1 add b int not null, add filler char(200);
|
|
insert into t1 select * from t1;
|
|
insert into t1 select * from t1;
|
|
set @save_join_cache_level=@@join_cache_level;
|
|
set join_cache_level=6;
|
|
select * from t0 where t0.a in (select t1.a from t1 where t1.b=0);
|
|
a
|
|
0
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
6
|
|
7
|
|
8
|
|
9
|
|
set join_cache_level=@save_join_cache_level;
|
|
drop table t0, t1;
|
|
#
|
|
# BUG#32665 Query with dependent subquery is too slow
|
|
#
|
|
create table t1 (
|
|
idIndividual int primary key
|
|
);
|
|
insert into t1 values (1),(2);
|
|
create table t2 (
|
|
idContact int primary key,
|
|
contactType int,
|
|
idObj int
|
|
);
|
|
insert into t2 values (1,1,1),(2,2,2),(3,3,3);
|
|
create table t3 (
|
|
idAddress int primary key,
|
|
idContact int,
|
|
postalStripped varchar(100)
|
|
);
|
|
insert into t3 values (1,1, 'foo'), (2,2,'bar');
|
|
The following must be converted to a semi-join:
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
set @@optimizer_switch='materialization=off';
|
|
explain extended SELECT a.idIndividual FROM t1 a
|
|
WHERE a.idIndividual IN
|
|
( SELECT c.idObj FROM t3 cona
|
|
INNER JOIN t2 c ON c.idContact=cona.idContact
|
|
WHERE cona.postalStripped='T2H3B2'
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY cona ALL NULL NULL NULL NULL 2 100.00 Using where; Start temporary
|
|
1 PRIMARY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using where
|
|
1 PRIMARY a eq_ref PRIMARY PRIMARY 4 test.c.idObj 1 100.00 Using index; End temporary
|
|
Warnings:
|
|
Note 1003 select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where `test`.`cona`.`postalStripped` = 'T2H3B2' and `test`.`a`.`idIndividual` = `test`.`c`.`idObj` and `test`.`c`.`idContact` = `test`.`cona`.`idContact`
|
|
set @@optimizer_switch=@save_optimizer_switch;
|
|
drop table t1,t2,t3;
|
|
#
|
|
# BUG#47367 Crash in Name_resolution_context::process_error
|
|
#
|
|
SET SESSION optimizer_switch = 'semijoin=off';
|
|
CREATE TABLE t1 (f1 INTEGER);
|
|
CREATE TABLE t2 LIKE t1;
|
|
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
|
|
CALL p1;
|
|
f1
|
|
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
|
|
CALL p1;
|
|
f1
|
|
DROP PROCEDURE p1;
|
|
# Restore the original column list of table t2:
|
|
ALTER TABLE t2 CHANGE COLUMN my_column f1 INT;
|
|
SET SESSION optimizer_switch = 'semijoin=on';
|
|
# Recreate procedure so that we eliminate any caching effects
|
|
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
|
|
CALL p1;
|
|
f1
|
|
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
|
|
CALL p1;
|
|
ERROR 42S22: Unknown column 'f1' in 'WHERE'
|
|
DROP PROCEDURE p1;
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# fix of lp:824425 (prohibiting subqueries in row in
|
|
# left part of IN/ALL/ANY)
|
|
#
|
|
CREATE TABLE t1 ( a int) ;
|
|
INSERT INTO t1 VALUES (20),(30);
|
|
CREATE TABLE t2 (a int) ;
|
|
INSERT INTO t2 VALUES (3),(9);
|
|
CREATE TABLE t3 ( a int, b int) ;
|
|
INSERT INTO t3 VALUES (20,5),(30,6);
|
|
set @optimizer_switch_save=@@optimizer_switch;
|
|
SET SESSION optimizer_switch='semijoin=OFF,in_to_exists=OFF,materialization=ON,partial_match_rowid_merge=ON,partial_match_table_scan=OFF';
|
|
SELECT * FROM t1
|
|
WHERE (
|
|
( SELECT a FROM t2 WHERE a = 9 )
|
|
) NOT IN (
|
|
SELECT b
|
|
FROM t3
|
|
);
|
|
a
|
|
20
|
|
30
|
|
explain extended
|
|
SELECT * FROM t1
|
|
WHERE (
|
|
( SELECT a FROM t2 WHERE a = 9 )
|
|
) NOT IN (
|
|
SELECT b
|
|
FROM t3
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
|
3 MATERIALIZED t3 ALL NULL NULL NULL NULL 2 100.00
|
|
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where 1
|
|
SELECT * FROM t1
|
|
WHERE (
|
|
( SELECT a FROM t2 WHERE a = 9 ),
|
|
( SELECT a FROM t2 WHERE a = 3 )
|
|
) NOT IN (
|
|
SELECT b , a
|
|
FROM t3
|
|
);
|
|
ERROR 42000: This version of MariaDB doesn't yet support 'SUBQUERY in ROW in left expression of IN/ALL/ANY'
|
|
set optimizer_switch=@optimizer_switch_save;
|
|
drop table t1,t2,t3;
|
|
End of 5.3 tests
|
|
#
|
|
# BUG#48920: COUNT DISTINCT returns 1 for NULL values when in a subquery
|
|
# in the select list
|
|
#
|
|
|
|
CREATE TABLE t1 (
|
|
i int(11) DEFAULT NULL,
|
|
v varchar(1) DEFAULT NULL
|
|
);
|
|
|
|
INSERT INTO t1 VALUES (8,'v');
|
|
INSERT INTO t1 VALUES (9,'r');
|
|
INSERT INTO t1 VALUES (NULL,'y');
|
|
|
|
CREATE TABLE t2 (
|
|
i int(11) DEFAULT NULL,
|
|
v varchar(1) DEFAULT NULL,
|
|
KEY i_key (i)
|
|
);
|
|
|
|
INSERT INTO t2 VALUES (NULL,'r');
|
|
INSERT INTO t2 VALUES (0,'c');
|
|
INSERT INTO t2 VALUES (0,'o');
|
|
INSERT INTO t2 VALUES (2,'v');
|
|
INSERT INTO t2 VALUES (7,'c');
|
|
|
|
SELECT i, v, (SELECT COUNT(DISTINCT i)
|
|
FROM t1
|
|
WHERE v = t2.v) as subsel
|
|
FROM t2;
|
|
i v subsel
|
|
NULL r 1
|
|
0 c 0
|
|
0 o 0
|
|
2 v 1
|
|
7 c 0
|
|
|
|
EXPLAIN EXTENDED
|
|
SELECT i, v, (SELECT COUNT(DISTINCT i)
|
|
FROM t1
|
|
WHERE v = t2.v) as subsel
|
|
FROM t2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00
|
|
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t2.v' of SELECT #2 was resolved in SELECT #1
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`i` AS `i`,`test`.`t2`.`v` AS `v`,<expr_cache><`test`.`t2`.`v`>((/* select#2 */ select count(distinct `test`.`t1`.`i`) from `test`.`t1` where `test`.`t1`.`v` = `test`.`t2`.`v`)) AS `subsel` from `test`.`t2`
|
|
DROP TABLE t1,t2;
|
|
End of 5.6 tests
|
|
# end of 10.2 test
|