On Sun, Sep 8, 2024 at 3:41 PM Laurenz Albe <laurenz.albe@xxxxxxxxxxx> wrote: > You must be doing something wrong then, because it works: And you are right, I was doing something wrong: The combination of the change and the library internals triggered a SET statement_timeout TO 3000; before the ROLLBACK was sent, and the error message I got was not clear on which statement triggered it. I'm sorry for the noise. Btw. Is there any guideline on how to write the client libraries or recommendations/tests that a client library should follow? Thanks, Istvan