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

Merge.

Browse Source
This commit is contained in:
Igor Babaev
2010-10-30 06:07:45 -07:00
parent d48a8b6034 05092b7323
commit 0b72fd88a1
108 changed files with 7091 additions and 3170 deletions
Download Patch File Download Diff File Expand all files Collapse all files

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

@ -921,4 +921,23 @@ EXECUTE stmt;
DEALLOCATE PREPARE stmt;
DROP TABLE t1;
--echo #
--echo # BUG#47217 Lost optimization caused slowdown & wrong result.
--echo #
CREATE TABLE t1 (pk INT, v VARCHAR(2), PRIMARY KEY(pk));
CREATE INDEX ix1 ON t1(v);
CREATE TABLE t2 (pk INT, v VARCHAR(2), PRIMARY KEY(pk));
CREATE INDEX ix2 ON t2(v);
INSERT INTO t1 VALUES (1,'a'),(2,NULL);
INSERT INTO t2 VALUES (1,NULL);
EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v ORDER BY 1;
EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v;
INSERT INTO t1 VALUES (3,'b'),(4,NULL),(5,'c'),(6,'cc'),(7,'d'),
(8,'dd'),(9,'e'),(10,'ee');
INSERT INTO t2 VALUES (2,NULL);
FLUSH STATUS;
SELECT * FROM t1 JOIN t2 ON t1.v = t2.v WHERE t2.v IS NULL ORDER BY 1;
SHOW STATUS LIKE 'Handler_read_%';
DROP TABLE t1, t2;
--echo End of 5.1 tests