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: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Performance improvement for joins where outer side is unique
Date: 2017-04-09 08:53:34
Message-ID: CAKJS1f_rfUq0367DMNvEs+3AWnvsUJPfBe2u_zLJYSKtPjcyLA@mail.gmail.com
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On 8 April 2017 at 14:23, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> writes:
> [ unique_joins_2017-04-07b.patch ]
>
> It turned out that this patch wasn't as close to committable as I'd
> thought, but after a full day of whacking at it, I got to a place
> where I thought it was OK. So, pushed.

Many thanks for taking the time to do this, and committing too!

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

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