Re: How about a proper TEMPORARY TABLESPACE?

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Fabrízio de Royes Mello <fabriziomello(at)gmail(dot)com>, Matheus de Oliveira <matioli(dot)matheus(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: How about a proper TEMPORARY TABLESPACE?
Date: 2014-06-18 19:53:34
Message-ID: 20140618195333.GM18688@eldon.alvh.no-ip.org
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Stephen Frost wrote:
> * Tom Lane (tgl(at)sss(dot)pgh(dot)pa(dot)us) wrote:
> > Stephen Frost <sfrost(at)snowman(dot)net> writes:
> > > Yes. I'd definitely like to see an ALTER TABLESPACE option, with an
> > > ERROR that lists out all of the non-temporary objects which are found
> > > (and lists any other databases which have objects in those
> > > tablespaces..). That would allow administrators who have existing
> > > notionally temporary-only tablespaces to go clean things up to make them
> > > actually temporary-only.

> > I would certainly suggest that the first version of the patch not
> > undertake to allow this property to be ALTERed; the cost-benefit
> > ratio isn't there IMO.
>
> I suppose scheduling downtime to do the check manually across all
> databases, then drop and recreate the tablespace, would work. As
> someone who's working with a couple of these cases, it'd be awful nice
> if there was a way PG would handle it for me.

I wonder if some form of NOT VALID marking could be useful here. Of
course, this is not a constraint. But a mechanism of a similar spirit
seems apropos. It seems reasonable to leave such a thing for future
improvement.

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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