Re: Push down more full joins in postgres_fdw

From: Etsuro Fujita <fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp>
To: Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Push down more full joins in postgres_fdw
Date: 2016-09-12 12:35:35
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On 2016/09/09 21:35, Etsuro Fujita wrote:
> On 2016/09/08 19:51, Etsuro Fujita wrote:
>> On 2016/09/06 22:07, Ashutosh Bapat wrote:
>>> This patch tries to do two things at a time 1. support join pushdown for
>>> FULL join when the joining relations have remote conditions 2. better
>>> support for fetching placeholder vars, whole row references and some
>>> system columns. To make reviews easy, I think we should split the patch
>>> into two 1. supporting subqueries to be deparsed with support for one of
>>> the above (I will suggest FULL join support) 2. support for the other.

>> OK, will try.

> I extracted #1 from the patch. Attached is a patch for that. If that
> patch is reasonable, I'll create a patch for #2 on top of it.

Attached is a patch for #2. In that patch I fixed some bugs and added a
bit more comments. For testing, please apply the patch for #1 first.

Best regards,
Etsuro Fujita

Attachment Content-Type Size
postgres-fdw-phv-pushdown-v1.patch binary/octet-stream 65.4 KB

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