31 lines
702 B
Plaintext
31 lines
702 B
Plaintext
Parsed test spec with 4 sessions
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starting permutation: rx1 wx2 c2 wx3 ry3 wy4 rz4 c4 c3 wz1 c1
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step rx1: SELECT * FROM t WHERE id = 1000000;
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id|txt
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-------+---
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1000000|
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(1 row)
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step wx2: UPDATE t SET txt = 'b' WHERE id = 1000000;
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step c2: COMMIT;
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step wx3: UPDATE t SET txt = 'c' WHERE id = 1000000;
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step ry3: SELECT * FROM t WHERE id = 500000;
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id|txt
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------+---
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500000|
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(1 row)
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step wy4: UPDATE t SET txt = 'd' WHERE id = 500000;
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step rz4: SELECT * FROM t WHERE id = 1;
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id|txt
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--+---
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1|
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(1 row)
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step c4: COMMIT;
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step c3: COMMIT;
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step wz1: UPDATE t SET txt = 'a' WHERE id = 1;
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ERROR: could not serialize access due to read/write dependencies among transactions
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step c1: COMMIT;
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