Re: Patch: Range Merge Join

From: Jaime Casanova <jcasanov(at)systemguards(dot)com(dot)ec>
To: Jeff Davis <pgsql(at)j-davis(dot)com>
Cc: David Rowley <dgrowleyml(at)gmail(dot)com>, Thomas <thomasmannhart97(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, boehlen(at)ifi(dot)uzh(dot)ch, dignoes(at)inf(dot)unibz(dot)it, gamper(at)inf(dot)unibz(dot)it, P(dot)Moser(at)noi(dot)bz(dot)it
Subject: Re: Patch: Range Merge Join
Date: 2021-10-04 21:27:54
Message-ID: 20211004212754.GA30366@ahch-to
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On Thu, Jun 10, 2021 at 07:14:32PM -0700, Jeff Davis wrote:
> On Thu, 2021-06-10 at 15:09 +1200, David Rowley wrote:
> > It shouldn't be a blocker for you, but just so you're aware, there
> > was
> > a previous proposal for this in [1] and a patch in [2]. I've include
> > Jeff here just so he's aware of this. Jeff may wish to state his
> > intentions with his own patch. It's been a few years now.
> Great, thank you for working on this!
> I'll start with the reason I set the work down before: it did not work
> well with multiple join keys. That might be fine, but I also started
> thinking it was specialized enough that I wanted to look into doing it
> as an extension using the CustomScan mechanism.
> Do you have any solution to working better with multiple join keys? And
> do you have thoughts on whether it would be a good candidate for the
> CustomScan extension mechanism, which would make it easier to
> experiment with?


It seems this has been stalled since jun-2021. I intend mark this as
RwF unless someone speaks in the next hour or so.

Jaime Casanova
Director de Servicios Profesionales
SystemGuards - Consultores de PostgreSQL

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