Date: Sun, 13 Oct 2019 13:30:29 -0500
From: Justin Pryzby <pryzby@telsasoft.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-hackers@lists.postgresql.org,
	Amit Langote <amitlangote09@gmail.com>
Subject: Re: v12.0: ERROR: could not find pathkey item to sort
Message-ID: <20191013183029.GI4475@telsasoft.com>
References: <20191011143703.GN10470@telsasoft.com>
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 <20191012222346.GB4475@telsasoft.com>
 <16802.1570989962@sss.pgh.pa.us>
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On Sun, Oct 13, 2019 at 02:06:02PM -0400, Tom Lane wrote:
> Justin Pryzby <pryzby@telsasoft.com> writes:
> > On Fri, Oct 11, 2019 at 10:48:37AM -0400, Tom Lane wrote:
> >> Could you provide a self-contained test case please?
> 
> > [ test case ]
> 
> Oh, this is the same issue Amit described in 
> 
> https://www.postgresql.org/message-id/flat/CA%2BHiwqG2WVUGmLJqtR0tPFhniO%3DH%3D9qQ%2BZ3L_ZC%2BY3-EVQHFGg%40mail.gmail.com
> 
> namely that we're not generating EquivalenceClass members corresponding
> to sub-joins of a partitionwise join.
> 
> Are you interested in helping to test the patches proposed there?

Sure.  Any requests other than testing that our original query works correctly
and maybe endeavoring to read the patch ?

BTW it probably should've been documented as an "Open Item" for v12.

-- 
Justin Pryzby
System Administrator
Telsasoft
+1-952-707-8581