Horton

Re: autonomous transactions

Simon Riggs <simon@2ndquadrant.com>

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From: Simon Riggs <simon@2ndquadrant.com>
To: Neil Conway <neilc@samurai.com>
Cc: Pavel Stehule <pavel.stehule@gmail.com>, Alvaro Herrera <alvherre@commandprompt.com>, "Roberts, Jon" <Jon.Roberts@asurion.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2008-01-23T21:32:59Z
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