Re: fdw_scan_tlist for foreign table scans breaks EPQ testing, doesn't it?

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com>
Cc: Etsuro Fujita <fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: fdw_scan_tlist for foreign table scans breaks EPQ testing, doesn't it?
Date: 2015-07-23 14:57:09
Message-ID: CA+TgmoYsGUFVWO6EefcfjNKyw+0y_pdZ6B+DKUnrp2J=Cfjn_w@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Wed, Jul 22, 2015 at 8:24 PM, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com> wrote:
> Indeed, this commit allows ForeignScan to have fdw_scan_tlist, even if
> scanrelid > 0, however, I'm uncertain about its reason/intention.
> Does it a preparation for the upcoming target-list-pushdown??

I guess Tom would have to comment on whether it could be used for that
purpose. I assume that omitting columns could be interesting for some
FDWs, if nothing else.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Paul Ramsey 2015-07-23 14:57:15 Re: [PATCH] postgres_fdw extension support
Previous Message Paul Ramsey 2015-07-23 14:48:49 Re: [PATCH] postgres_fdw extension support