| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: WIP: Upper planner pathification |
| Date: | 2016-03-16 18:27:23 |
| Message-ID: | CA+TgmobugEwMLFgKPdK3=TqqkMmb2CXiU=NAXAZg-upaAp5kiA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Mar 14, 2016 at 9:21 PM, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com> wrote:
> So, even though we don't need to define multiple hook declarations,
> I think the hook invocation is needed just after create_xxxx_paths()
> for each. It will need to inform extension the context of hook
> invocation, the argument list will take UpperRelationKind.
That actually seems like a pretty good point. Otherwise you can't
push anything from the upper rels down unless you are prepared to
handle all of it.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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