diff options
Diffstat (limited to 'mysql-test')
| -rw-r--r-- | mysql-test/r/heap_hash.result | 19 | ||||
| -rw-r--r-- | mysql-test/t/heap_hash.test | 15 |
2 files changed, 34 insertions, 0 deletions
diff --git a/mysql-test/r/heap_hash.result b/mysql-test/r/heap_hash.result index bae49af462f..a0872fb09c5 100644 --- a/mysql-test/r/heap_hash.result +++ b/mysql-test/r/heap_hash.result @@ -382,3 +382,22 @@ INSERT INTO t1 VALUES('A ', 'A '); ERROR 23000: Duplicate entry 'A -A ' for key 'key1' DROP TABLE t1; End of 5.0 tests +# +# MDEV-568 (AKA LP BUG#1007981, AKA MySQL bug#44771) +# Wrong result for a hash index look-up if the index is unique and +# the key is NULL +# +CREATE TABLE t1 ( pk INT PRIMARY KEY, val INT, UNIQUE KEY USING HASH(val)) ENGINE=MEMORY; +INSERT INTO t1 VALUES (1, NULL); +INSERT INTO t1 VALUES (2, NULL); +INSERT INTO t1 VALUES (3, 1); +INSERT INTO t1 VALUES (4, NULL); +EXPLAIN SELECT * FROM t1 WHERE val IS NULL; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref val val 5 const 1 Using where +SELECT * FROM t1 WHERE val IS NULL; +pk val +4 NULL +2 NULL +1 NULL +drop table t1; diff --git a/mysql-test/t/heap_hash.test b/mysql-test/t/heap_hash.test index 1e3491f89a9..c8efddc9958 100644 --- a/mysql-test/t/heap_hash.test +++ b/mysql-test/t/heap_hash.test @@ -284,3 +284,18 @@ INSERT INTO t1 VALUES('A ', 'A '); DROP TABLE t1; --echo End of 5.0 tests + +--echo # +--echo # MDEV-568 (AKA LP BUG#1007981, AKA MySQL bug#44771) +--echo # Wrong result for a hash index look-up if the index is unique and +--echo # the key is NULL +--echo # +CREATE TABLE t1 ( pk INT PRIMARY KEY, val INT, UNIQUE KEY USING HASH(val)) ENGINE=MEMORY; + +INSERT INTO t1 VALUES (1, NULL); +INSERT INTO t1 VALUES (2, NULL); +INSERT INTO t1 VALUES (3, 1); +INSERT INTO t1 VALUES (4, NULL); +EXPLAIN SELECT * FROM t1 WHERE val IS NULL; +SELECT * FROM t1 WHERE val IS NULL; +drop table t1; |