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Re: fdw_scan_tlist for foreign table scans breaks EPQ testing, doesn't it? - Mailing list pgsql-hackers

From Robert Haas
Subject Re: fdw_scan_tlist for foreign table scans breaks EPQ testing, doesn't it?
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Msg-id CA+TgmoYsGUFVWO6EefcfjNKyw+0y_pdZ6B+DKUnrp2J=Cfjn_w@mail.gmail.com
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In response to Re: fdw_scan_tlist for foreign table scans breaks EPQ testing, doesn't it?  (Kouhei Kaigai <kaigai@ak.jp.nec.com>)
Responses Re: fdw_scan_tlist for foreign table scans breaks EPQ testing, doesn't it?
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On Wed, Jul 22, 2015 at 8:24 PM, Kouhei Kaigai <kaigai@ak.jp.nec.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

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