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Subject: Re: regression in PG 15.1
From: Scott Ribe <scott_ribe@elevated-dev.com>
In-Reply-To: <543106.1669646690@sss.pgh.pa.us>
Date: Mon, 28 Nov 2022 07:57:16 -0700
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> On Nov 28, 2022, at 7:44 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>=20
> Why do you say this is a regression?  =46rom what I know of the =
partition
> pruning logic (admittedly not a whole lot), I don't think we'd have
> ever pruned on the basis of such a constraint.

Because performance of the query tanked. If it's not a change in table =
pruning, then it's a change in whether/how/which indexes are used. I =
guess I'll have to dig into it more and get back to the list--probably =
tomorrow.

Meantime, thanks for the clue to help guide me here.