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825 lines
28 KiB
Plaintext
825 lines
28 KiB
Plaintext
drop table if exists t0, t1, t2, t3, t4, t5;
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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; Using filesort
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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 `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(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; Using filesort
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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 `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(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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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; Using filesort
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Warnings:
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Note 1003 select <in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(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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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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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 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 `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,<in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) having trigcond(<is_not_null_test>(`test`.`t1`.`a`))))) 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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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_next 0
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_next 29
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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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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 `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 AS `Not_used` 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 isnull(`test`.`t1`.`a`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`)))) 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 `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 AS `Not_used` 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; Using filesort
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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 `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>(`test`.`t2`.`a`,<exists>(select count(0) AS `count(*)` 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 `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `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(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`)))))) 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 where; Using join buffer
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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 `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` join `test`.`t4` where ((`test`.`t1`.`c` = `test`.`t2`.`oref`) and trigcond(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`))))) 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;
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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 8 100.00 Using where
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2 DEPENDENT SUBQUERY t1 index_subquery idx idx 5 func 4 100.00 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 `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,<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(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`ie1`) or isnull(`test`.`t1`.`ie1`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`ie2`) or isnull(`test`.`t1`.`ie2`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`ie1`)) and trigcond(<is_not_null_test>(`test`.`t1`.`ie2`)))))) AS `Z` from `test`.`t2` where ((`test`.`t2`.`b` = 10) and (`test`.`t2`.`a` = 10))
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drop table t1, t2;
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create table t1 (oref char(4), grp int, ie int);
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insert into t1 (oref, grp, ie) values
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('aa', 10, 2),
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('aa', 10, 1),
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('aa', 20, NULL),
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('bb', 10, 3),
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('cc', 10, 4),
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('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
|
|
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
|
|
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; Using filesort
|
|
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
|
|
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
|
|
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 `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,<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(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`ie1`) or isnull(`test`.`t1`.`ie1`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`ie2`) or isnull(`test`.`t1`.`ie2`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`ie1`)) and trigcond(<is_not_null_test>(`test`.`t1`.`ie2`)))))) 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; Using filesort
|
|
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;
|
|
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 `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (not(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 AS `Not_used` from `test`.`t1` where ((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)) having <is_not_null_test>(`test`.`t1`.`a`))))))
|
|
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 func 1 Using where; Full scan on NULL key
|
|
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;
|
|
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 (
|
|
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;
|
|
End of 5.0 tests
|
|
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;
|