Re: Performance improvement for joins where outer side is unique

From: David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Performance improvement for joins where outer side is unique
Date: 2017-01-18 22:06:14
Message-ID: CAKJS1f_VX2z=XRSS=mCcCYYtBmVr-3YVeRVroS-WEOBAA4iVbg@mail.gmail.com
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On 3 December 2016 at 10:26, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> On Dec 2, 2016, at 7:47 AM, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com> wrote:
>>> Patch still applies fine to HEAD.
>>> Moved to next CF with "ready for committer" status.
>
>> Tom, are you picking this up?
>
> Yeah, I apologize for not having gotten to it in this commitfest, but
> it's definitely something I will look at.

Old patch no longer applies, so I've attached a rebased patch. This
also re-adds a comment line which I mistakenly removed.

--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

Attachment Content-Type Size
unique_joins_2017-01-19.patch application/octet-stream 77.1 KB

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