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Merge mysql.com:/home/psergey/mysql-5.0-bug8804-r12
into mysql.com:/home/psergey/mysql-5.1-bug8804-r12-merge sql/item_cmpfunc.cc: Auto merged sql/item_cmpfunc.h: Auto merged sql/item_subselect.h: Auto merged sql/mysql_priv.h: Auto merged sql/mysqld.cc: Auto merged sql/sql_lex.h: Auto merged sql/sql_select.cc: Auto merged sql/sql_select.h: Auto merged mysql-test/r/ndb_subquery.result: Manual merge mysql-test/r/subselect.result: Manual merge mysql-test/r/subselect3.result: Manual merge sql/item_subselect.cc: Manual merge
This commit is contained in:
unknown
@ -15,9 +15,8 @@ insert into t2 values
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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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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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@ -25,14 +24,13 @@ 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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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 '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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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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@ -42,6 +40,16 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
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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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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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@ -79,12 +87,12 @@ oref a Z
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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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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 4
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2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 2 Using where; Full scan on NULL key
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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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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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@ -143,11 +151,480 @@ 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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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 3
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2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 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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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 Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 3
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2 DEPENDENT SUBQUERY t1 ref a a 4 func 2 Using where; Full scan on NULL key
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2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 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`))))) 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 Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2
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2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 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 Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2
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2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 2 Using where; Full scan on NULL key
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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`.`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 Extra
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||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
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||||
2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 2 Using where; Full scan on NULL key
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2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 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`.`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),
|
||||
('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);
|
||||
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 ;
|
||||
oref a b Z
|
||||
cc 3 NULL NULL
|
||||
insert into t2 values ('new1', 10,10);
|
||||
insert into t1 values ('new1', 1234, 10, NULL);
|
||||
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;
|
||||
oref a b Z
|
||||
new1 10 10 NULL
|
||||
explain extended
|
||||
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 Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 8 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery idx idx 5 func 4 Using where; Full scan on NULL key
|
||||
Warnings:
|
||||
Note 1276 Field or reference '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` where ((`test`.`t2`.`b` = 10) and (`test`.`t2`.`a` = 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
|
||||
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 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
|
||||
Warnings:
|
||||
Note 1276 Field or reference '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;
|
||||
|
||||
Reference in New Issue
Block a user