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mysql-test/r/subselect3.result: 'filtered' column added mysql-test/r/udf.result: 'filtered' column added
153 lines
6.3 KiB
Text
153 lines
6.3 KiB
Text
drop table if exists t0, t1, t2, t3, t4;
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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) from t2;
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a oref a in (select max(ie)
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from t1 where oref=t2.oref group by grp)
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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) 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 '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 `a in (select max(ie)
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from t1 where oref=t2.oref group by grp)` 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 '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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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 index; Using where
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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`.`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`)))) 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
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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 '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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