| From: | Ronan Dunklau <ronan(dot)dunklau(at)aiven(dot)io> |
|---|---|
| To: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Cc: | Magnus Hagander <magnus(at)hagander(dot)net>, pgsql-hackers(at)lists(dot)postgresql(dot)org, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, Vik Fearing <vik(at)postgresfriends(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: Ordering behavior for aggregates |
| Date: | 2022-12-13 16:45:46 |
| Message-ID: | 4789760.31r3eYUQgx@aivenlaptop |
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| Lists: | pgsql-hackers |
Le mardi 13 décembre 2022, 16:13:34 CET Tom Lane a écrit :
> Accordingly, I find nothing at all attractive in this proposal.
> I think the main thing it'd accomplish is to drive users back to
> the bad old days of ordering-by-subquery, if they have a requirement
> we failed to account for.
I think the ability to mark certain aggregates as being able to completely
ignore the ordering because they produce exactly the same results is still a
useful optimization.
--
Ronan Dunklau
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