Re: Multiple hosts in connection string failed to failover in non-hot standby mode

Justin Pryzby <pryzby@telsasoft.com> writes:
> 52a10224 broke sqlsmith, of all things.

> It was using errmsg as a test of success, instead of checking if the connection
> result wasn't null:

>      conn = PQconnectdb(conninfo.c_str());
>      char *errmsg = PQerrorMessage(conn);
>      if (strlen(errmsg))
>          throw dut::broken(errmsg, "08001");

> That's clearly the wrong thing to do, but maybe this should be described in the
> release notes as a compatibility issue, in case other people had the same idea.
> Clearing errorMessage during success is an option..

Hm.  I'd debated whether to clear conn->errorMessage at the end of
a successful connection sequence, and decided not to on the grounds
that it might be interesting info (eg it could tell you why you
ended up connected to server Y and not server X).  But perhaps
it's too much of a compatibility break for this small benefit.

I'm curious though why it took this long for anyone to complain.
I'd supposed that people were running sqlsmith against HEAD on
a pretty regular basis.

            regards, tom lane