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MDEV-30706 Different results of selects from view and CTE with same definition
MDEV-30668 Set function aggregated in outer select used in view definition This patch fixes two bugs concerning views whose specifications contain subqueries with set functions aggregated in outer selects. Due to the first bug those such views that have implicit grouping were considered as mergeable. This led to wrong result sets for selects from these views. Due to the second bug the aggregation select was determined incorrectly and this led to bogus error messages. The patch added several test cases for these two bugs and for four other duplicate bugs. The patch also enables view-protocol for many other test cases. Approved by Oleksandr Byelkin <sanja@mariadb.com>
This commit is contained in:
Igor Babaev
@ -122,27 +122,27 @@ ROW(1,2,3) > (SELECT 1,2,1)
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SELECT ROW(1,2,3) = (SELECT 1,2,NULL);
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ROW(1,2,3) = (SELECT 1,2,NULL)
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NULL
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'a');
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(SELECT 1.5,2,'a') = ROW(1.5,2,'a')
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'a') AS m;
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m
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1
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'b');
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(SELECT 1.5,2,'a') = ROW(1.5,2,'b')
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,2,'b') AS m;
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m
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0
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SELECT (SELECT 1.5,2,'a') = ROW('1.5b',2,'b');
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(SELECT 1.5,2,'a') = ROW('1.5b',2,'b')
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SELECT (SELECT 1.5,2,'a') = ROW('1.5b',2,'b') AS m;
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m
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0
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Warnings:
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Warning 1292 Truncated incorrect DOUBLE value: '1.5b'
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SELECT (SELECT 'b',2,'a') = ROW(1.5,2,'a');
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(SELECT 'b',2,'a') = ROW(1.5,2,'a')
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SELECT (SELECT 'b',2,'a') = ROW(1.5,2,'a') AS m;
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m
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0
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Warnings:
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Warning 1292 Truncated incorrect DOUBLE value: 'b'
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,'2','a');
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(SELECT 1.5,2,'a') = ROW(1.5,'2','a')
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SELECT (SELECT 1.5,2,'a') = ROW(1.5,'2','a') AS m;
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m
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1
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SELECT (SELECT 1.5,'c','a') = ROW(1.5,2,'a');
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(SELECT 1.5,'c','a') = ROW(1.5,2,'a')
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SELECT (SELECT 1.5,'c','a') = ROW(1.5,2,'a') AS m;
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m
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0
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Warnings:
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Warning 1292 Truncated incorrect DECIMAL value: 'c'
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@ -232,19 +232,26 @@ a
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2
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select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1);
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a
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select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
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b (select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)
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select
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b,
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(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) as m
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from t4;
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b m
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8 7.5000
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8 4.5000
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9 7.5000
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explain extended select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
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explain extended
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select
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b,
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(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) as m
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from t4;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t4 ALL NULL NULL NULL NULL 3 100.00
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2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00
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3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where
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Warnings:
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Note 1276 Field or reference 'test.t4.a' of SELECT #3 was resolved in SELECT #1
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Note 1003 /* select#1 */ select `test`.`t4`.`b` AS `b`,<expr_cache><`test`.`t4`.`a`>((/* select#2 */ select avg(`test`.`t2`.`a` + (/* select#3 */ select min(`test`.`t3`.`a`) from `test`.`t3` where `test`.`t3`.`a` >= `test`.`t4`.`a`)) from `test`.`t2`)) AS `(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)` from `test`.`t4`
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Note 1003 /* select#1 */ select `test`.`t4`.`b` AS `b`,<expr_cache><`test`.`t4`.`a`>((/* select#2 */ select avg(`test`.`t2`.`a` + (/* select#3 */ select min(`test`.`t3`.`a`) from `test`.`t3` where `test`.`t3`.`a` >= `test`.`t4`.`a`)) from `test`.`t2`)) AS `m` from `test`.`t4`
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select * from t3 where exists (select * from t2 where t2.b=t3.a);
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a
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7
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@ -311,21 +318,34 @@ select b,max(a) as ma from t4 group by b having b >= (select max(t2.a) from t2 w
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b ma
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7 12
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create table t5 (a int);
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select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
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(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) a
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select
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(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) as m,
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a
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from t2;
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m a
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NULL 1
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2 2
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insert into t5 values (5);
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select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
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(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) a
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select
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(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) as m,
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a
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from t2;
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m a
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NULL 1
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2 2
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insert into t5 values (2);
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select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
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(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) a
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select
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(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) as m,
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a
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from t2;
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m a
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NULL 1
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2 2
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explain extended select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
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explain extended
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select
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(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) as m,
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a
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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 system NULL NULL NULL NULL 1 100.00
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@ -334,7 +354,7 @@ NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1276 Field or reference 'test.t2.a' of SELECT #2 was resolved in SELECT #1
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Note 1276 Field or reference 'test.t2.a' of SELECT #3 was resolved in SELECT #1
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Note 1003 /* select#1 */ select <expr_cache><`test`.`t2`.`a`>((/* select#2 */ select 2 from dual where 2 = `test`.`t2`.`a` union /* select#3 */ select `test`.`t5`.`a` from `test`.`t5` where `test`.`t5`.`a` = `test`.`t2`.`a`)) AS `(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a)`,`test`.`t2`.`a` AS `a` from `test`.`t2`
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Note 1003 /* select#1 */ select <expr_cache><`test`.`t2`.`a`>((/* select#2 */ select 2 from dual where 2 = `test`.`t2`.`a` union /* select#3 */ select `test`.`t5`.`a` from `test`.`t5` where `test`.`t5`.`a` = `test`.`t2`.`a`)) AS `m`,`test`.`t2`.`a` AS `a` from `test`.`t2`
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select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
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ERROR 21000: Subquery returns more than 1 row
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create table t6 (patient_uq int, clinic_uq int, index i1 (clinic_uq));
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@ -490,8 +510,11 @@ SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic HAVING t
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mot topic date pseudo
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joce 40143 2002-10-22 joce
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joce 43506 2002-10-22 joce
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SELECT *, topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100) from t2;
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mot topic date pseudo topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100)
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SELECT
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*,
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topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 4100) AS m
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FROM t2;
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mot topic date pseudo m
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joce 40143 2002-10-22 joce 1
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joce 43506 2002-10-22 joce 1
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SELECT * from t2 where topic = all (SELECT SUM(topic) FROM t2);
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@ -509,8 +532,11 @@ joce 40143 2002-10-22 joce
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SELECT * from t2 where topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000);
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mot topic date pseudo
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joce 40143 2002-10-22 joce
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SELECT *, topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000) from t2;
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mot topic date pseudo topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000)
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SELECT
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*,
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topic = all (SELECT topic FROM t2 GROUP BY topic HAVING topic < 41000) AS m
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FROM t2;
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mot topic date pseudo m
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joce 40143 2002-10-22 joce 1
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joce 43506 2002-10-22 joce 0
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drop table t1,t2;
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@ -885,6 +911,25 @@ NULL
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select 1.5 > ANY (SELECT * from t1);
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1.5 > ANY (SELECT * from t1)
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NULL
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update t1 set a=NULL where a=2.5;
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select 1.5 IN (SELECT * from t1);
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1.5 IN (SELECT * from t1)
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1
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select 3.5 IN (SELECT * from t1);
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3.5 IN (SELECT * from t1)
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1
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select 10.5 IN (SELECT * from t1);
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10.5 IN (SELECT * from t1)
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NULL
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select 1.5 > ALL (SELECT * from t1);
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1.5 > ALL (SELECT * from t1)
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0
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select 10.5 > ALL (SELECT * from t1);
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10.5 > ALL (SELECT * from t1)
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NULL
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select 1.5 > ANY (SELECT * from t1);
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1.5 > ANY (SELECT * from t1)
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NULL
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select 10.5 > ANY (SELECT * from t1);
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10.5 > ANY (SELECT * from t1)
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1
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@ -895,6 +940,20 @@ Warnings:
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Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
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Note 1249 Select 2 was reduced during optimization
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Note 1003 select `test`.`t1`.`a` + 1 AS `(select a+1)` from `test`.`t1`
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explain extended select (select a+1) from t1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
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Warnings:
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Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
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Note 1249 Select 2 was reduced during optimization
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Note 1003 select `test`.`t1`.`a` + 1 AS `(select a+1)` from `test`.`t1`
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explain extended select (select a+1) from t1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
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Warnings:
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Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
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Note 1249 Select 2 was reduced during optimization
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Note 1003 select `test`.`t1`.`a` + 1 AS `(select a+1)` from `test`.`t1`
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select (select a+1) from t1;
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(select a+1)
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2.5
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@ -1536,8 +1595,8 @@ create table t3 (a int, b int);
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insert into t1 values (0,100),(1,2), (1,3), (2,2), (2,7), (2,-1), (3,10);
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insert into t2 values (0,0), (1,1), (2,1), (3,1), (4,1);
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insert into t3 values (3,3), (2,2), (1,1);
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select a,(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1) from t3;
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a (select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1)
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select a,(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1) as m from t3;
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a m
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3 1
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2 2
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1 2
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@ -1732,8 +1791,8 @@ CREATE TABLE `t3` (`taskgenid` mediumint(9) NOT NULL auto_increment,`dbid` int(1
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INSERT INTO `t3` (`taskgenid`, `dbid`, `taskid`, `mon`, `tues`,`wed`, `thur`, `fri`, `sat`, `sun`, `how_often`, `userid`, `active`) VALUES (1,-1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1);
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CREATE TABLE `t4` (`task_id` smallint(6) NOT NULL default '0',`description` varchar(200) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
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INSERT INTO `t4` (`task_id`, `description`) VALUES (1, 'Daily Check List'),(2, 'Weekly Status');
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select dbid, name, (date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01') from t3 a, t2 b, t4 WHERE dbid = - 1 AND primary_uid = '1' AND t4.task_id = taskid;
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dbid name (date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01')
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select dbid, name, (date_format(now() , '%Y-%m-%d') - INTERVAL how_often DAY) >= ifnull((SELECT date_format(max(create_date),'%Y-%m-%d') as m FROM t1 WHERE dbid = b.db_id AND taskid = a.taskgenid), '1950-01-01') as m from t3 a, t2 b, t4 WHERE dbid = - 1 AND primary_uid = '1' AND t4.task_id = taskid;
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dbid name m
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-1 Valid 1
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-1 Valid 2 1
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-1 Should Not Return 0
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@ -3787,9 +3846,10 @@ SELECT (SELECT COUNT(DISTINCT t1.b) from t2) FROM t1 GROUP BY t1.a;
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2
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1
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1
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SELECT (SELECT COUNT(DISTINCT t1.b) from t2 union select 1 from t2 where 12 < 3)
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SELECT
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(SELECT COUNT(DISTINCT t1.b) from t2 union select 1 from t2 where 12 < 3) AS m
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FROM t1 GROUP BY t1.a;
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(SELECT COUNT(DISTINCT t1.b) from t2 union select 1 from t2 where 12 < 3)
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m
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2
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1
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1
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@ -3799,9 +3859,9 @@ COUNT(DISTINCT t1.b) (SELECT COUNT(DISTINCT t1.b))
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1 1
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1 1
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SELECT COUNT(DISTINCT t1.b),
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(SELECT COUNT(DISTINCT t1.b) union select 1 from DUAL where 12 < 3)
|
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(SELECT COUNT(DISTINCT t1.b) union select 1 from DUAL where 12 < 3) AS m
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FROM t1 GROUP BY t1.a;
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COUNT(DISTINCT t1.b) (SELECT COUNT(DISTINCT t1.b) union select 1 from DUAL where 12 < 3)
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COUNT(DISTINCT t1.b) m
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2 2
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1 1
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1 1
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@ -3825,16 +3885,10 @@ SELECT (
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SELECT COUNT(DISTINCT t1.b)
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)
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)
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FROM t1 GROUP BY t1.a LIMIT 1)
|
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FROM t1 GROUP BY t1.a LIMIT 1) AS m
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FROM t1 t2
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GROUP BY t2.a;
|
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(
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SELECT (
|
||||
SELECT (
|
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SELECT COUNT(DISTINCT t1.b)
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)
|
||||
)
|
||||
FROM t1 GROUP BY t1.a LIMIT 1)
|
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m
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2
|
||||
2
|
||||
2
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@ -6425,11 +6479,10 @@ CREATE TABLE t3 (a int, b int);
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INSERT INTO t3 VALUES (10,7), (0,7);
|
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SELECT SUM(DISTINCT b),
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(SELECT t2.a FROM t1 JOIN t2 ON t2.c != 0
|
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WHERE t.a != 0 AND t2.a != 0)
|
||||
WHERE t.a != 0 AND t2.a != 0) AS m
|
||||
FROM (SELECT * FROM t3) AS t
|
||||
GROUP BY 2;
|
||||
SUM(DISTINCT b) (SELECT t2.a FROM t1 JOIN t2 ON t2.c != 0
|
||||
WHERE t.a != 0 AND t2.a != 0)
|
||||
SUM(DISTINCT b) m
|
||||
7 NULL
|
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SELECT SUM(DISTINCT b),
|
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(SELECT t2.a FROM t1,t2 WHERE t.a != 0 or 1=2 LIMIT 1)
|
||||
@ -6562,66 +6615,93 @@ CREATE TABLE t3 (f3a int default 1, f3b int default 2);
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INSERT INTO t3 VALUES (1,1),(2,2);
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set @old_optimizer_switch = @@session.optimizer_switch;
|
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set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,subquery_cache=off,semijoin=off';
|
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SELECT (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1) FROM t2;
|
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(SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a,f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1) FROM t2;
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) FROM t2;
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1);
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) AS m;
|
||||
m
|
||||
NULL
|
||||
SELECT (SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1) FROM t2;
|
||||
(SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a,f3a FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1) FROM t2;
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) FROM t2;
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1);
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) AS m;
|
||||
m
|
||||
NULL
|
||||
set @@session.optimizer_switch=@old_optimizer_switch;
|
||||
SELECT (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1) FROM t2;
|
||||
(SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a,f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1) FROM t2;
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a,f1a FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) FROM t2;
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1);
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) NOT IN (SELECT f1a, f1b FROM t1) AS m;
|
||||
m
|
||||
NULL
|
||||
SELECT (SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1) FROM t2;
|
||||
SELECT
|
||||
(SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1) FROM t2 AS m;
|
||||
(SELECT f3a FROM t3 where f3a > 3) IN (SELECT f1a FROM t1)
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a,f3a FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1) FROM t2;
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a,f3a FROM t3 where f3a > 3) IN (SELECT f1a,f1a FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) FROM t2;
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) AS m
|
||||
FROM t2;
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
SELECT (SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1);
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1)
|
||||
SELECT
|
||||
(SELECT f3a, f3b FROM t3 where f3a > 3) IN (SELECT f1a, f1b FROM t1) AS m;
|
||||
m
|
||||
NULL
|
||||
select (null, null) = (null, null);
|
||||
(null, null) = (null, null)
|
||||
@ -6667,8 +6747,10 @@ INSERT INTO t2 VALUES (1);
|
||||
CREATE TABLE t3 ( c INT );
|
||||
INSERT INTO t3 VALUES (4),(5);
|
||||
SET optimizer_switch='subquery_cache=off';
|
||||
SELECT ( SELECT b FROM t2 WHERE b = a OR EXISTS ( SELECT c FROM t3 WHERE c = b ) ) FROM t1;
|
||||
( SELECT b FROM t2 WHERE b = a OR EXISTS ( SELECT c FROM t3 WHERE c = b ) )
|
||||
SELECT
|
||||
( SELECT b FROM t2 WHERE b = a OR EXISTS ( SELECT c FROM t3 WHERE c = b ) ) AS m
|
||||
FROM t1;
|
||||
m
|
||||
1
|
||||
NULL
|
||||
SELECT ( SELECT b FROM t2 WHERE b = a OR b * 0) FROM t1;
|
||||
@ -6885,7 +6967,9 @@ CREATE TABLE t3 (c INT);
|
||||
INSERT INTO t3 VALUES (8),(3);
|
||||
set @@expensive_subquery_limit= 0;
|
||||
EXPLAIN
|
||||
SELECT (SELECT MIN(b) FROM t1, t2 WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3)))
|
||||
SELECT
|
||||
(SELECT MIN(b) FROM t1, t2
|
||||
WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3))) AS m
|
||||
FROM t2 alias1, t1 alias2, t1 alias3;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 ALL NULL NULL NULL NULL 2
|
||||
@ -6895,9 +6979,11 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
3 SUBQUERY t3 ALL NULL NULL NULL NULL 2
|
||||
flush status;
|
||||
SELECT (SELECT MIN(b) FROM t1, t2 WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3)))
|
||||
SELECT
|
||||
(SELECT MIN(b) FROM t1, t2
|
||||
WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3))) AS m
|
||||
FROM t2 alias1, t1 alias2, t1 alias3;
|
||||
(SELECT MIN(b) FROM t1, t2 WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3)))
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
NULL
|
||||
@ -6923,7 +7009,9 @@ Handler_read_rnd_deleted 0
|
||||
Handler_read_rnd_next 22
|
||||
set @@expensive_subquery_limit= default;
|
||||
EXPLAIN
|
||||
SELECT (SELECT MIN(b) FROM t1, t2 WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3)))
|
||||
SELECT
|
||||
(SELECT MIN(b) FROM t1, t2
|
||||
WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3))) AS m
|
||||
FROM t2 alias1, t1 alias2, t1 alias3;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 ALL NULL NULL NULL NULL 2
|
||||
@ -6933,9 +7021,11 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
3 SUBQUERY t3 ALL NULL NULL NULL NULL 2
|
||||
flush status;
|
||||
SELECT (SELECT MIN(b) FROM t1, t2 WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3)))
|
||||
SELECT
|
||||
(SELECT MIN(b) FROM t1, t2
|
||||
WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3))) AS m
|
||||
FROM t2 alias1, t1 alias2, t1 alias3;
|
||||
(SELECT MIN(b) FROM t1, t2 WHERE b = a AND (b = alias1.b OR EXISTS (SELECT * FROM t3)))
|
||||
m
|
||||
NULL
|
||||
NULL
|
||||
NULL
|
||||
|
||||
Reference in New Issue
Block a user