Re: Poor performance using CTE

On 2012-11-21 13:16:25 -0300, Claudio Freire wrote:
> On Wed, Nov 21, 2012 at 12:32 PM, Andres Freund <andres@anarazel.de> wrote:
> > +1
> >
> > WITH foo AS (SELECT ...) (barrier=on|off)?
> >
> > 9.3 introduces the syntax, defaulting to on
> > 9.4 switches the default to off.
>
> Why syntax? What about a guc?
>
> collapse_cte_limit?

Because there are very good reasons to want to current behaviour. A guc
is a global either/or so I don't see it helping much.

Greetings,

Andres Freund

--
 Andres Freund                       http://www.2ndQuadrant.com/
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