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MDEV-389: Wrong result (missing row) with semijoin, join_cache_level>4 ...

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- Added testcase
This commit is contained in:
Sergey Petrunya 2013-05-04 21:02:07 +04:00
parent 2a8db1ca59
commit 71422d7b14
3 changed files with 63 additions and 0 deletions
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18
mysql-test/r/subselect_sj.result
View File

@ -2852,4 +2852,22 @@ field1
o
o
DROP TABLE t1, t2;
#
# MDEV-389: Wrong result (missing row) with semijoin, join_cache_level>4, LEFT JOIN...
# (testcase only)
#
SET join_cache_level = 5;
SET optimizer_switch = 'semijoin=on';
CREATE TABLE t1 (a INT NOT NULL, b CHAR(1), KEY(a)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (4,'p'),(1,'q'),(8,'e');
CREATE TABLE t2 (c INT, d CHAR(1), KEY(c), KEY(d)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (4,'f'),(2,'i'),(5,'h'),(3,'q'),(1,'g');
SELECT a, COUNT(*) AS cnt
FROM t1 LEFT JOIN t2 ON (d = b)
WHERE a IN ( SELECT c FROM t2 WHERE b > 'k' )
GROUP BY a ORDER BY a, cnt LIMIT 2;
a cnt
1 1
4 1
drop table t1, t2;
set optimizer_switch=@subselect_sj_tmp;

18
mysql-test/r/subselect_sj_jcl6.result
View File

@ -2866,6 +2866,24 @@ field1
o
o
DROP TABLE t1, t2;
#
# MDEV-389: Wrong result (missing row) with semijoin, join_cache_level>4, LEFT JOIN...
# (testcase only)
#
SET join_cache_level = 5;
SET optimizer_switch = 'semijoin=on';
CREATE TABLE t1 (a INT NOT NULL, b CHAR(1), KEY(a)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (4,'p'),(1,'q'),(8,'e');
CREATE TABLE t2 (c INT, d CHAR(1), KEY(c), KEY(d)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (4,'f'),(2,'i'),(5,'h'),(3,'q'),(1,'g');
SELECT a, COUNT(*) AS cnt
FROM t1 LEFT JOIN t2 ON (d = b)
WHERE a IN ( SELECT c FROM t2 WHERE b > 'k' )
GROUP BY a ORDER BY a, cnt LIMIT 2;
a cnt
1 1
4 1
drop table t1, t2;
set optimizer_switch=@subselect_sj_tmp;
#
# BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off

27
mysql-test/t/subselect_sj.test
View File

@ -2540,5 +2540,32 @@ WHERE (field1) IN ($query);
DROP TABLE t1, t2;
--echo #
--echo # MDEV-389: Wrong result (missing row) with semijoin, join_cache_level>4, LEFT JOIN...
--echo # (testcase only)
--echo #
# Use another connection to get rid of this test's settings
connect (con1,localhost,root,,);
connection con1;
SET join_cache_level = 5;
SET optimizer_switch = 'semijoin=on';
CREATE TABLE t1 (a INT NOT NULL, b CHAR(1), KEY(a)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (4,'p'),(1,'q'),(8,'e');
CREATE TABLE t2 (c INT, d CHAR(1), KEY(c), KEY(d)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (4,'f'),(2,'i'),(5,'h'),(3,'q'),(1,'g');
SELECT a, COUNT(*) AS cnt
FROM t1 LEFT JOIN t2 ON (d = b)
WHERE a IN ( SELECT c FROM t2 WHERE b > 'k' )
GROUP BY a ORDER BY a, cnt LIMIT 2;
drop table t1, t2;
connection default;
disconnect con1;
# The following command must be the last one the file
set optimizer_switch=@subselect_sj_tmp;