On Tue, 10 Feb 2009 11:36:38 -0500 Bruno Lavoie wrote:
> Oracle Flashback Query seems to use undo logs to return in a point in
> time if the undo retention param permit it. You can do it with a date,
> or with the SCN (system change number), a kind of transaction number. It
> saves you administration task and table management, and *space*.
>
> Is this doable with PG, using some pg transaction logs?
I think, the only way is to use PITR and roll the backup forward during
the exact point you want to see.
Probably another way - but really untested and dangerous - would be to
play around with the meta information for each row. But VACUUM makes
sure dead rows are removed very fast, so i think it's not even worth to
try out.
Bye
--
Andreas 'ads' Scherbaum
German PostgreSQL User Group
European PostgreSQL User Group - Board of Directors
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