Re: Small question

Jan Wieck wrote:
> Bruce Momjian wrote:
> > Tom Lane wrote:
> > > Jan Wieck <janwieck(at)yahoo(dot)com> writes:
> > > >> It seems like it might be possible for libpq (or other clients) to keep
> > > >> track of the transaction state by paying attention to BEGIN, COMMIT,
> > > >> ABORT command-completion tags and ERROR messages, but I haven't worked
> > > >> through the details.
> > >
> > > > PQexec(c, "BEGIN; SELECT now()");
> > >
> > > > Will there even be a BEGIN command tag sent?
> > >
> > > Yes. PQexec doesn't tell you about it, but one comes through. (This
> > > is certainly true in current sources, and I believe has always been true.)
> > >
> > > It'd be nastier if we allowed functions to change the transaction-block
> > > state, but we don't...
> >
> > We only need one bit to pass the transaction status back to the client.
> > Shame we can't throw that bit in there somewhere.
>
> Huh? You can represent 3 possible states in one bit? I know
> that I'm not too bad of a programmer, but you're far better
> than me :-p
>

Compression, of course. ;-)

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026