| From: | Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl> |
|---|---|
| To: | Dennis Bjorklund <db(at)zigo(dot)dhs(dot)org> |
| Cc: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Pavel Stehule <stehule(at)kix(dot)fsv(dot)cvut(dot)cz>, Zeugswetter Andreas SB SD <ZeugswetterA(at)spardat(dot)at>, Andreas Pflug <pgadmin(at)pse-consulting(dot)de>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Nested Transactions, Abort All |
| Date: | 2004-07-09 18:17:31 |
| Message-ID: | 20040709181731.GB25393@dcc.uchile.cl |
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| Lists: | pgsql-hackers |
On Fri, Jul 09, 2004 at 07:10:06PM +0200, Dennis Bjorklund wrote:
> On Fri, 9 Jul 2004, Bruce Momjian wrote:
>
> > I think we agreed on BEGIN NESTED/COMMIT NESTED, and START NESTED
> > TRANSACTION and COMMIT NESTED TRANSACTION.
>
> Should I read this as pg will get its own implementation of sub
> transactions and not implement the almost equivalent standard (sql99)
> savepoint feature?
I think we should get both. Clearly savepoints do not allow for a
snapshot to be released; nested xacts do.
OTOH savepoints are trivial to implement once nested xacts are in place.
They are only syntactic sugar.
--
Alvaro Herrera (<alvherre[a]dcc.uchile.cl>)
"Pensar que el espectro que vemos es ilusorio no lo despoja de espanto,
sólo le suma el nuevo terror de la locura" (Perelandra, CSLewis)
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