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Re: autonomous transactions

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 (view raw or flat)
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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