| From: | Chapman Flack <chap(at)anastigmatix(dot)net> |
|---|---|
| To: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, Vik Fearing <vik(at)postgresfriends(dot)org> |
| Cc: | Vlad Bokov <vlad(at)razum2um(dot)me>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: CREATE AGGREGATE array_cat |
| Date: | 2020-11-19 00:54:52 |
| Message-ID: | 5FB5C25C.7090703@anastigmatix.net |
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| Lists: | pgsql-hackers |
On 11/18/20 19:46, David G. Johnston wrote:
> I doubt there is any substantial resistance to including such a function
> but it would have to be written in C.
Would anything have to be written at all, save the CREATE AGGREGATE
suggested in the original message, using the existing array_cat as the
state transition function?
I suppose one might add an optimization to the existing array_cat to
detect the aggregate case, and realize it could clobber its left argument.
(But I'm not sure how much that would save, with arrays.)
Regards,
-Chap
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