Re: timeout implementation issues

From: Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Peter Eisentraut <peter_e(at)gmx(dot)net>, Michael Loftis <mloftis(at)wgops(dot)com>, PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: timeout implementation issues
Date: 2002-04-10 04:31:58
Message-ID: 3CB3C03E.5FF92203@tpf.co.jp
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Bruce Momjian wrote:
>
> Hiroshi Inoue wrote:
> > > > ??? What do you mean by
> > > > o Some SETs are honored in an aborted transaction (current)
> > > > ?
> > > > Is the current state different from
> > > > o All SETs are honored in an aborted transaction
> > > > ?
> > >
> > > In the case of:
> > >
> > > BEGIN WORK;
> > > SET x=1;
> > > bad query that aborts transaction;
> > > SET x=2;
> > > COMMIT WORK;
> > >
> > > Only the first SET is done, so at the end, x = 1. If all SET's were
> > > honored, x = 2. If no SETs in an aborted transaction were honored, x
> > > would equal whatever it was before the BEGIN WORK above.
> >
> > IMHO
> > o No SETs are honored in an aborted transaction(current)
> >
> > The first SET isn't done in an aborted transaction.
>
> I guess my point is that with our current code, there is a distinction
> that SETs are executed before a transaction aborts, but are ignored
> after a transaction aborts, even if the SETs are in the same
> transaction.

Not only SET commands but also most commands are ignored
after a transaction aborts currently. SET commands are out
of transactional control but it doesn't mean they are never
ignore(rejecte)d.

regards,
Hiroshi Inoue

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