What do You mean by history table? Creating such table is out of the question.
> Date: Fri, 27 Aug 2010 10:04:39 -0700
> From: craig_james(at)emolecules(dot)com
> To:
> Subject: Re: [ADMIN] Tuple changes from relfilenodes
>
> On 8/27/10 9:48 AM, ?ukasz Brodziak wrote:
> > I'm looking for actual versions of row data. What I want to achieve as a final result is a kind of data change history.
>
> What about a before-update trigger and an history table?
>
> Craig