Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> writes:
>> I think you're overly optimistic to believe that every failure will
>> have a SQLSTATE; I don't think that's true for libpq-reported errors,
>> such as connection loss.
> Yep, I thought I was optimistic:-) Can I add a special SQLSTATE for that
> situation where libpq did not report an error?
Meh. If we're going to do that I think it might be better to hack
libpq itself to do so, ie, force PQresultErrorField(..., PG_DIAG_SQLSTATE)
to always return something. But it seems like a hack either way.
regards, tom lane