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Merged fix for the bug#37870.

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This commit is contained in:
Evgeny Potemkin
2008-10-27 15:04:51 +03:00
parent 8d108cb53b e27e560783
commit fbb6efeb51
3 changed files with 30 additions and 2 deletions
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15
mysql-test/r/explain.result
View File

@ -155,3 +155,18 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
Warnings:
Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
DROP TABLE t1,t2;
#
# Bug#37870: Usage of uninitialized value caused failed assertion.
#
create table t1 (dt datetime not null);
create table t2 (dt datetime not null);
insert into t1 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
flush tables;
EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY OUTR ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY INNR ALL NULL NULL NULL NULL 2 Using where
SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
dt
drop tables t1, t2;

12
mysql-test/t/explain.test
View File

@ -123,4 +123,16 @@ execute s1;
DROP TABLE t1,t2;
--echo #
--echo # Bug#37870: Usage of uninitialized value caused failed assertion.
--echo #
create table t1 (dt datetime not null);
create table t2 (dt datetime not null);
insert into t1 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
flush tables;
EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
drop tables t1, t2;
# End of 5.0 tests.