database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

fix for LP bug#994392

Browse Source 
The not_null_tables() of Item_func_not_all and Item_in_optimizer was inherited from
Item_func by mistake. It made the optimizer think that  subquery
predicates with ALL/ANY/IN were null-rejecting. This could trigger invalid
conversions of outer joins into inner joins.
This commit is contained in:
unknown
2012-05-11 09:35:46 +03:00
parent 6fc863c749
commit f2cbc014d9
3 changed files with 45 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
mysql-test/r/join_outer.result
View File

@ -1596,3 +1596,27 @@ f
1
DROP TABLE t1;
End of 5.1 tests
#
# LP BUG#994392: Wrong result with RIGHT/LEFT JOIN and ALL subquery
# predicate in WHERE condition.
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(9);
CREATE TABLE t2(b INT);
INSERT INTO t2 VALUES(8);
CREATE TABLE t3(c INT);
INSERT INTO t3 VALUES(3);
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
b c
NULL 3
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
c b
3 NULL
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
b c
NULL 3
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
c b
3 NULL
drop table t1,t2,t3;
End of 5.2 tests

19
mysql-test/t/join_outer.test
View File

@ -1162,3 +1162,22 @@ DROP TABLE t1;
--echo End of 5.1 tests
--echo #
--echo # LP BUG#994392: Wrong result with RIGHT/LEFT JOIN and ALL subquery
--echo # predicate in WHERE condition.
--echo #
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(9);
CREATE TABLE t2(b INT);
INSERT INTO t2 VALUES(8);
CREATE TABLE t3(c INT);
INSERT INTO t3 VALUES(3);
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
drop table t1,t2,t3;
--echo End of 5.2 tests