From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Patches <pgsql-patches(at)postgresql(dot)org> |
Subject: | Re: Basic subtransaction facility |
Date: | 2004-04-29 04:26:01 |
Message-ID: | 200404290426.i3T4Q1e25035@candle.pha.pa.us |
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Lists: | pgsql-patches |
Alvaro Herrera wrote:
> On Mon, Apr 26, 2004 at 11:30:16PM -0400, Bruce Momjian wrote:
>
> > Alvaro, where are we on this patch. I think the suggestion was to
> > throw FATAL rather than add a new error level.
>
> The assumption was that we would only want an additional level for
> catching can't-happen conditions. ISTM this is not true. Consider an
> out of memory error: do we want to only rollback the affected
> subtransaction, or the whole transaction tree? If we want the latter we
> will have to invent a new elevel.
>
> In fact, I think we should mark ERROR as aborting the whole transaction
> tree, and create a new level which would abort the innermost
> subtransaction. We would then change whatever is appropiate to the new
> elevel. Doing otherwise would leave us open to unexpected conditions
> causing only subtrans abort, which could lead to unreliable behavior.
>
> In short, I think all elog(ERROR) should have different behaviour from
> ereport(ERROR), at least. And I don't think the answer should be
> elog(FATAL) for the former.
Agreed we need a new error code to abort a subtransaction rather than
the entire transaction.
I don't understand your elog(ERROR) vs. ereport(ERROR) distinction. Was
that a typo?
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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