44 lines
970 B
Plaintext
44 lines
970 B
Plaintext
Parsed test spec with 3 sessions
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starting permutation: sl1_prep upd_getlock sl1_exec upd_doupdate lk1_doforshare upd_releaselock
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step sl1_prep:
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PREPARE sl1_run AS SELECT id FROM test_nowait WHERE pg_advisory_lock(0) is not null FOR UPDATE NOWAIT;
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step upd_getlock:
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SELECT pg_advisory_lock(0);
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pg_advisory_lock
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----------------
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(1 row)
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step sl1_exec:
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BEGIN ISOLATION LEVEL READ COMMITTED;
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EXECUTE sl1_run;
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SELECT xmin, xmax, ctid, * FROM test_nowait;
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<waiting ...>
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step upd_doupdate:
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BEGIN ISOLATION LEVEL READ COMMITTED;
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UPDATE test_nowait SET value = value WHERE id % 2 = 0;
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COMMIT;
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step lk1_doforshare:
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BEGIN ISOLATION LEVEL READ COMMITTED;
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SELECT id FROM test_nowait WHERE id % 2 = 0 FOR SHARE;
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id
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--
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2
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(1 row)
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step upd_releaselock:
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SELECT pg_advisory_unlock(0);
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pg_advisory_unlock
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------------------
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t
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(1 row)
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step sl1_exec: <... completed>
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ERROR: could not obtain lock on row in relation "test_nowait"
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