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Parsed test spec with 3 sessions
starting permutation: wx1 wx2 c1 c2 read
step wx1: UPDATE accounts SET balance = balance - 200 WHERE accountid = 'checking';
step wx2: UPDATE accounts SET balance = balance + 450 WHERE accountid = 'checking'; <waiting ...>
step c1: COMMIT;
step wx2: <... completed>
step c2: COMMIT;
step read: SELECT * FROM accounts ORDER BY accountid;
accountid balance
checking 850
savings 600
starting permutation: wy1 wy2 c1 c2 read
step wy1: UPDATE accounts SET balance = balance + 500 WHERE accountid = 'checking';
step wy2: UPDATE accounts SET balance = balance + 1000 WHERE accountid = 'checking' AND balance < 1000; <waiting ...>
step c1: COMMIT;
step wy2: <... completed>
step c2: COMMIT;
step read: SELECT * FROM accounts ORDER BY accountid;
accountid balance
checking 1100
savings 600
starting permutation: upsert1 upsert2 c1 c2 read
step upsert1:
WITH upsert AS
(UPDATE accounts SET balance = balance + 500
WHERE accountid = 'savings'
RETURNING accountid)
INSERT INTO accounts SELECT 'savings', 500
WHERE NOT EXISTS (SELECT 1 FROM upsert);
step upsert2:
WITH upsert AS
(UPDATE accounts SET balance = balance + 1234
WHERE accountid = 'savings'
RETURNING accountid)
INSERT INTO accounts SELECT 'savings', 1234
WHERE NOT EXISTS (SELECT 1 FROM upsert);
<waiting ...>
step c1: COMMIT;
step upsert2: <... completed>
step c2: COMMIT;
step read: SELECT * FROM accounts ORDER BY accountid;
accountid balance
checking 600
savings 2334
starting permutation: readp1 writep1 readp2 c1 c2
step readp1: SELECT tableoid::regclass, ctid, * FROM p WHERE b IN (0, 1) AND c = 0 FOR UPDATE;
tableoid ctid a b c
c1 (0,1) 0 0 0
c1 (0,4) 0 1 0
c2 (0,1) 1 0 0
c2 (0,4) 1 1 0
c3 (0,1) 2 0 0
c3 (0,4) 2 1 0
step writep1: UPDATE p SET b = -1 WHERE a = 1 AND b = 1 AND c = 0;
step readp2: SELECT tableoid::regclass, ctid, * FROM p WHERE b IN (0, 1) AND c = 0 FOR UPDATE; <waiting ...>
step c1: COMMIT;
step readp2: <... completed>
tableoid ctid a b c
c1 (0,1) 0 0 0
c1 (0,4) 0 1 0
c2 (0,1) 1 0 0
c3 (0,1) 2 0 0
c3 (0,4) 2 1 0
step c2: COMMIT;
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