1Parsed test spec with 2 sessions 2 3starting permutation: rw1 rw2 c1 c2 4step rw1: SELECT insert_unique(1, '1'); 5insert_unique 6------------- 7 8(1 row) 9 10step rw2: SELECT insert_unique(1, '2'); <waiting ...> 11step c1: COMMIT; 12step rw2: <... completed> 13ERROR: could not serialize access due to read/write dependencies among transactions 14step c2: COMMIT; 15