| From: | Vik Fearing <vik(at)postgresfriends(dot)org> |
|---|---|
| To: | Chapman Flack <chap(at)anastigmatix(dot)net>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
| 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 00:59:31 |
| Message-ID: | e4ed6185-370a-f145-edea-5942fb705686@postgresfriends.org |
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| Lists: | pgsql-hackers |
On 11/19/20 1:54 AM, Chapman Flack wrote:
> 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?
Nope. As my example showed.
One could imagine extending it with an inverse transition function for
use in windows (small w) but that's about it.
--
Vik Fearing
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