On 1/11/08, alphax <[EMAIL PROTECTED]> wrote:

> I want to determines a given record which visible to current transaction
> whether or not be updated after some time point, that time point is
> indicated by aother transaction id started and committed in past time.

I'm not sure I understand, but maybe this thread will help?
http://archives.postgresql.org/pgsql-general/2007-10/msg00503.php

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