From: Tom Lane <tgl@sss.pgh.pa.us>
To: David Rowley <drowley@postgresql.org>
Cc: pgsql-committers@lists.postgresql.org, Richard Guo <guofenglinux@gmail.com>
Subject: Re: pgsql: Fix LATERAL join test in test memoize.sql
Date: Mon, 23 Jan 2023 18:37:41 -0500
Message-ID: <2144818.1674517061@sss.pgh.pa.us> (raw)
In-Reply-To: <E1pK6H4-0058ux-8l@gemulon.postgresql.org>
References: <E1pK6H4-0058ux-8l@gemulon.postgresql.org>
David Rowley <drowley@postgresql.org> writes:
> Here we add a simple ORDER BY to stop the planner from being able to
> pullup the lateral subquery.
Hmmm ... we have an agreed syntax for a subquery optimization fence,
and that ain't it. I wouldn't count on this not breaking again in
the future. Why not OFFSET 0, which is the usual method?
regards, tom lane
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To: pgsql-committers@postgresql.org
Cc: tgl@sss.pgh.pa.us, drowley@postgresql.org, guofenglinux@gmail.com
Subject: Re: pgsql: Fix LATERAL join test in test memoize.sql
In-Reply-To: <2144818.1674517061@sss.pgh.pa.us>
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