50 lines
1.3 KiB
Plaintext
50 lines
1.3 KiB
Plaintext
Parsed test spec with 2 sessions
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starting permutation: r1 r2 w1 w2 c1 c2
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step r1: SELECT COALESCE(MAX(invoice_number) + 1, 1) FROM invoice WHERE year = 2016;
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coalesce
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--------
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3
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(1 row)
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step r2: SELECT COALESCE(MAX(invoice_number) + 1, 1) FROM invoice WHERE year = 2016;
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coalesce
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--------
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3
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(1 row)
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step w1: INSERT INTO invoice VALUES (2016, 3);
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step w2: INSERT INTO invoice VALUES (2016, 3); <waiting ...>
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step c1: COMMIT;
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step w2: <... completed>
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ERROR: could not serialize access due to read/write dependencies among transactions
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step c2: COMMIT;
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starting permutation: r1 w1 w2 c1 c2
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step r1: SELECT COALESCE(MAX(invoice_number) + 1, 1) FROM invoice WHERE year = 2016;
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coalesce
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--------
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3
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(1 row)
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step w1: INSERT INTO invoice VALUES (2016, 3);
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step w2: INSERT INTO invoice VALUES (2016, 3); <waiting ...>
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step c1: COMMIT;
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step w2: <... completed>
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ERROR: duplicate key value violates unique constraint "invoice_pkey"
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step c2: COMMIT;
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starting permutation: r2 w1 w2 c1 c2
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step r2: SELECT COALESCE(MAX(invoice_number) + 1, 1) FROM invoice WHERE year = 2016;
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coalesce
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--------
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3
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(1 row)
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step w1: INSERT INTO invoice VALUES (2016, 3);
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step w2: INSERT INTO invoice VALUES (2016, 3); <waiting ...>
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step c1: COMMIT;
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step w2: <... completed>
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ERROR: duplicate key value violates unique constraint "invoice_pkey"
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step c2: COMMIT;
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