Re: DISTINCT -> GROUP BY

On Tue, Jun 03, 2008 at 03:36:44PM +0200, Pavel Stehule wrote:
> Hello David
>
> http://www.postgresql.org/docs/faqs.TODO.html
>
> Consider using hash buckets to do DISTINCT, rather than sorting This
> would be beneficial when there are few distinct values. This is
> already used by GROUP BY.

It's nice to see that this is kinda on the TODO, but it doesn't
address the question I asked, which is, "how would I get the planner
to rewrite DISTINCTs as the equivalent GROUP BYs?" :)

Any hints?

Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
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