Re: [Bug fix] PQsendQuery occurs error when target_session_attrs is set to read-write

From: Ashutosh Bapat [mailto:ashutosh(dot)bapat(at)enterprisedb(dot)com]
> Per the documentation [1], "PQgetResult must be called repeatedly
> until it returns a null pointer, indicating that the command is
> done.". The code in PQgetResult() under CONNECTION_CHECK_WRITABLE
> case, violates that. The patch fixes it. The patch however jumps to
> keep_going without changing conn->status, which means that it will end
> up again in the same case. While that's fine, may be we should use a
> local loop on PQgetResult() to keep the code readable.
Thank you for reviewing the patch.
I created it with reference to pqSetenvPoll() in interfaces/libpq/fe-protocol2.c,
but I certainly thought that readability is not good.
I updated the patch, so I will add this to the next commitfest.

Regards,
Daisuke, Higuchi