Re: Fixing Grittner's planner issues - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Fixing Grittner's planner issues
Date
Msg-id 24928.1235073260@sss.pgh.pa.us
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In response to Re: Fixing Grittner's planner issues  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: Fixing Grittner's planner issues  (Robert Haas <robertmhaas@gmail.com>)
Re: Fixing Grittner's planner issues  (Greg Stark <stark@enterprisedb.com>)
List pgsql-hackers
Robert Haas <robertmhaas@gmail.com> writes:
> On Thu, Feb 19, 2009 at 1:20 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> [ back to planner stuff after a hiatus ]

> Well, as I wrote upthread:

What you're actually suggesting is modifying the executor to incorporate
the unique-fication logic into hashjoin and/or mergejoin.  Maybe, but
that code is way too complex already for my taste (especially mergejoin)
and what we'd save is, hmm, four lines in the planner.
        regards, tom lane


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