Re: Idea about estimating selectivity for single-column expressions - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Idea about estimating selectivity for single-column expressions
Date
Msg-id 26982.1250707878@sss.pgh.pa.us
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In response to Re: Idea about estimating selectivity for single-column expressions  (Greg Stark <gsstark@mit.edu>)
Responses Re: Idea about estimating selectivity for single-column expressions  (Josh Berkus <josh@agliodbs.com>)
List pgsql-hackers
Greg Stark <gsstark@mit.edu> writes:
> On Wed, Aug 19, 2009 at 7:22 PM, Tom Lane<tgl@sss.pgh.pa.us> wrote:
>> It may be that a subtransaction will actually be acceptable overhead,
>> as long as we don't go overboard and invoke this mechanism for "simple"
>> WHERE clauses. �Hard to tell without coding it up and testing it though.

> Are you looking for volunteers? Or have you already nearly finished?

I have not started on it, and have a few other things on my plate first.
I was planning to do it, but if you'd like to try, be my guest.
        regards, tom lane


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