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MDEV-25433: SKIP LOCKED should imply NOWAIT

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This also means SKIP LOCKED is compatible with the NOWAIT/
WAIT n syntax consisten with the MySQL-8.0 implementation.
This commit is contained in:
Daniel Black
2021-04-18 09:31:21 +10:00
parent bfedf1eb4b
commit af418bb9ef
5 changed files with 21 additions and 24 deletions
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8
mysql-test/suite/innodb/r/create_table_insert_skip_locked.result
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@@ -21,13 +21,13 @@ SELECT * FROM s0;
seat_id state
1 0
2 0
CREATE TEMPORARY TABLE s1 AS SELECT * FROM t1 WHERE state = 0 LIMIT 2 FOR UPDATE NOWAIT SKIP LOCKED;
CREATE TEMPORARY TABLE s1 AS SELECT * FROM t1 WHERE state = 0 LIMIT 2 FOR UPDATE SKIP LOCKED;
SELECT * FROM s1;
seat_id state
3 0
4 0
connection default;
CREATE TEMPORARY TABLE s0 AS SELECT * FROM t1 WHERE state = 0 LOCK IN SHARE MODE NOWAIT SKIP LOCKED;
CREATE TEMPORARY TABLE s0 AS SELECT * FROM t1 WHERE state = 0 LOCK IN SHARE MODE SKIP LOCKED;
SELECT * FROM s0;
seat_id state
1 0
@@ -52,13 +52,13 @@ seat_id state
1 0
2 0
CREATE TEMPORARY TABLE t2s LIKE t1;
INSERT INTO t2s SELECT * FROM t1 WHERE state = 0 LIMIT 2 FOR UPDATE NOWAIT SKIP LOCKED RETURNING seat_id, state;
INSERT INTO t2s SELECT * FROM t1 WHERE state = 0 LIMIT 2 FOR UPDATE SKIP LOCKED RETURNING seat_id, state;
seat_id state
3 0
4 0
connection default;
CREATE TEMPORARY TABLE t2s LIKE t1;
INSERT INTO t2s SELECT * FROM t1 WHERE state = 0 LOCK IN SHARE MODE NOWAIT SKIP LOCKED RETURNING seat_id, state;
INSERT INTO t2s SELECT * FROM t1 WHERE state = 0 LOCK IN SHARE MODE SKIP LOCKED RETURNING seat_id, state;
seat_id state
1 0
2 0