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From: Tom Lane <tgl@sss.pgh.pa.us>
To: John Naylor <john.naylor@enterprisedb.com>
Cc: PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Subject: Re: CAST from numeric(18,3) to numeric doesnt work, posgresql 13.3
Date: Thu, 16 Dec 2021 14:44:12 -0500
Message-ID: <1124027.1639683852@sss.pgh.pa.us> (raw)
In-Reply-To: <CAFBsxsEfbFHEkouc+FSj+3K1sHipLPbEC67L0SAe-9-da8QtYg@mail.gmail.com>
References: <CABNQVagu3bZGqiTjb31a8D5Od3fUMs7Oh3gmZMQZVHZ=uWWWfQ@mail.gmail.com>
	<2352034.1628127322@sss.pgh.pa.us>
	<CAEZATCWcOOGcYwTV0pv2F0o07w+dL7A2JN88fq5U-K29i=Ls=A@mail.gmail.com>
	<2395471.1628180285@sss.pgh.pa.us>
	<CAKFQuwbcqiOK_XbjkgRK9dTH9n-GmpJtgWUp=Jh+7kEOOVnoGQ@mail.gmail.com>
	<2501011.1628277029@sss.pgh.pa.us>
	<CAFBsxsEfbFHEkouc+FSj+3K1sHipLPbEC67L0SAe-9-da8QtYg@mail.gmail.com>

John Naylor <john.naylor@enterprisedb.com> writes:
> A customer reported a planning regression from 11.5 to 12.9. After
> bisecting, it seems the fix for the thread subject here, commit
> f230614da28, broke partition pruning in some cases.

[ facepalm... ]  I didn't consider the possibility that
find_typmod_coercion_function would find something ...
so we're getting an actual call of bpchar(), not just
a RelabelType.

			regards, tom lane





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