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src/test/isolation/specs/lock-nowait.spec
28 строк
645 B
Robert Haas
Allow a no-wait lock acquisition to succeed in more cases.
14 мар 2024, 15:56
14 мар 2024, 15:56
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# While requesting nowait lock, if the lock requested should # be inserted in front of some waiter, check to see if the lock # conflicts with already-held locks or the requests before # the waiter. If not, then just grant myself the requested # lock immediately. Test this scenario. setup { CREATE TABLE a1 (); } teardown { DROP TABLE a1; } session s1 setup { BEGIN; } step s1a { LOCK TABLE a1 IN ACCESS EXCLUSIVE MODE; } step s1b { LOCK TABLE a1 IN SHARE ROW EXCLUSIVE MODE NOWAIT; } step s1c { COMMIT; } session s2 setup { BEGIN; } step s2a { LOCK TABLE a1 IN EXCLUSIVE MODE; } step s2c { COMMIT; } permutation s1a s2a s1b s1c s2c