>Or, does the backend swallow the error, and return only the ReadyForQuery (I hope not).
What is your backend version? Here's a well-known case when the backend did swallow the error: "Error on failed COMMIT" https://www.postgresql.org/message-id/b9fb50dc-0f6e-15fb-6555-8ddb86f4aa71%40postgresfriends.org I don't remember if the behavior has been fixed or not. The expected behavior was "commit" returned "rollback" status without any error. Vladimir
