| From: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
|---|---|
| To: | Neil Conway <neilc(at)samurai(dot)com> |
| Cc: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, "Roberts, Jon" <Jon(dot)Roberts(at)asurion(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: autonomous transactions |
| Date: | 2008-01-23 21:32:59 |
| Message-ID: | 1201123979.4257.50.camel@ebony.site |
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| Thread: | |
| Lists: | pgsql-hackers |
On Wed, 2008-01-23 at 00:26 -0800, Neil Conway wrote:
> On Tue, 2008-01-22 at 20:53 +0100, Pavel Stehule wrote:
> > And there is most important question about data visibility - is
> > autonomous transaction independent on main transaction (isolation)?
>
> >From looking at how Oracle does them, autonomous transactions are
> completely independent of the transaction that originates them -- they
> take a new database snapshot. This means that uncommitted changes in the
> originating transaction are not visible to the autonomous transaction.
Oh! Recursion depth would need to be tested for as well. Nasty.
--
Simon Riggs
2ndQuadrant http://www.2ndQuadrant.com
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