mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 20:12:31 +01:00
365ba070fe
- Adopt MySQL's fix: don't run index_merge optimizer if the table statistics reports that the table has 0 rows.
19 lines
613 B
Text
19 lines
613 B
Text
#
|
|
# Bug #11880012: INDEX_SUBQUERY, BLACKHOLE,
|
|
# HANG IN PREPARING WITH 100% CPU USAGE
|
|
#
|
|
CREATE TABLE t1(a INT NOT NULL);
|
|
INSERT INTO t1 VALUES (1), (2), (3);
|
|
CREATE TABLE t2 (a INT UNSIGNED, b INT, UNIQUE KEY (a, b)) ENGINE=BLACKHOLE;
|
|
SELECT 1 FROM t1 WHERE a = ANY (SELECT a FROM t2);
|
|
1
|
|
DROP TABLE t1, t2;
|
|
End of 5.5 tests
|
|
#
|
|
# Bug#13948247 DIVISION BY 0 IN GET_BEST_DISJUNCT_QUICK WITH FORCE INDEX GROUP BY
|
|
#
|
|
CREATE TABLE t1(a INT, b INT, c INT, KEY(c), UNIQUE(a)) ENGINE = BLACKHOLE;
|
|
SELECT 0 FROM t1 FORCE INDEX FOR GROUP BY(a) WHERE a = 0 OR b = 0 AND c = 0;
|
|
0
|
|
DROP TABLE t1;
|
|
End of 5.6 tests
|