Robert Haas <robertmh...@gmail.com> writes: > On Mon, Mar 14, 2016 at 9:21 PM, Kouhei Kaigai <kai...@ak.jp.nec.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. I'm not exactly convinced of the use-case for that. What external thing is likely to handle window functions but not aggregation, for example? regards, tom lane -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers