I want to unsubscrib me please,
Mensaje citado por Hans-Juergen Schoenig <postgres(at)cybertec(dot)at>:
> hello ...
> i guess there is no formal proposal yet but there are some ideas
> around and some major challenges have been discussed already.
> i think simon riggs was planning to work on it in the future.
> the basic idea here is to have the option to create a "snapshot"
> which then stays in the database. the main challenge is that PostgreSQL
> should not keep all version of a row since the snapshot but VACUUM
> should be able to clean out all rows which are not seen by any
> snapshot or any ongoing transaction.
> this should be a quite fancy solution which is quite space efficient.
> internally we had the idea of tweaking VACUUM a little:
> VACUUM BEFORE timestamp;
> and ...
> SET current_snapshot TO '2007-10-10 ...';
> this would allow a queries to use any snapshot after the timestamp
> defined by VACUUM (if data is around).
> the downside here: you might potentially eat up more space.
> flashback data should be read only, of course.
> best regards,
> On Oct 31, 2007, at 11:31 AM, Gokulakannan Somasundaram wrote:
> > Hi,
> > I went through the mailing list and couldn't get answer to the
> > question.
> > a) Is there a proposal in place for going back in time within a
> > transaction?
> > --
> > Thanks,
> > Gokul.
> > CertoSQL Project,
> > Allied Solution Groups.
> > (www.alliedgroups.com)
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