Re: Hints (was Poor performance using CTE)

On 11/20/2012 08:15 PM, Craig Ringer wrote:

> I think it's time to admit that and get the syntax in place for CTEs so
> there's room to optimize them later, rather than cementing
> CTEs-as-fences in forever as a Pg quirk.

I know I'm just some schmo, but I'd vote for this. I'm certainly guilty
of using OFFSET 0. Undocumented hints are still hints. As much as I
think they're a bad idea by cementing a certain plan that may not get
the benefits of future versions, non-intuitive side-effects by using
overloaded syntax are worse.

I've been using CTEs as temp tables because I know that's how they work.
But I'd be more than willing to modify my syntax one way or the other to
adopt non-materialized CTEs, provided there's some way to get the
current behavior.

--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com

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