-- This should fail, because the two transactions have a write-skew anomaly
INSERT INTO pxtest1 VALUES ('fff');
ERROR: could not serialize access due to read/write dependencies among transactions
-DETAIL: Canceled on identification as a pivot, during write.
+DETAIL: Reason code: Canceled on identification as a pivot, during write.
HINT: The transaction might succeed if retried.
PREPARE TRANSACTION 'foo5';
SELECT gid FROM pg_prepared_xacts;