Re: libpq sendQuery -- getResult not returning until all queries complete

On Tue, Dec 21, 2010 at 6:49 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Merlin Moncure <mmoncure(at)gmail(dot)com> writes:
>> hm, a pq_flush() after command completion putmessage in
>> backend/tcop/dest.c seems to fix the problem.  I'll send up a patch to
>> -hackers.  They might backpatch it, unless there is a good reason not
>> to do this (I can't think of any).
>
> If you just unconditionally flush there, it will result in an extra
> network message in the normal case where there's not another query
> to do.  The current code is designed not to flush until it sends
> ReadyForQuery.

yeah, I was looking at that. I don't see an easy way to test if there
is another query waiting to execute right there. Maybe a
documentation patch is in order :-).

merlin