From: Tom Lane <tgl@sss.pgh.pa.us>
To: Richard Guo <guofenglinux@gmail.com>
Cc: pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Avoid mislabeling of lateral references when pulling up a subque
Date: Thu, 28 Nov 2024 20:44:30 -0500
Message-ID: <397371.1732844670@sss.pgh.pa.us> (raw)
In-Reply-To: <CAMbWs4-4vf7XvYHjQBqsA67zaLdmyKPaznFw78Kcp9mxdqMKEw@mail.gmail.com>
References: <E1tGn4j-0003zi-MP@gemulon.postgresql.org>
<CAMbWs4-4vf7XvYHjQBqsA67zaLdmyKPaznFw78Kcp9mxdqMKEw@mail.gmail.com>
Richard Guo <guofenglinux@gmail.com> writes:
> On Fri, Nov 29, 2024 at 7:33 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> It seems to be sufficient to just not mark lateral
>> references at all in this case. (I have a nagging feeling that more
>> complexity may be needed in cases where there are several levels of
>> outer join, but some attempts to break it with that didn't succeed.)
> You're right about your feeling. Here is a query that breaks it.
Ah, thanks for the test case. I'll look into it tomorrow.
regards, tom lane
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To: pgsql-committers@postgresql.org
Cc: tgl@sss.pgh.pa.us, guofenglinux@gmail.com, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Avoid mislabeling of lateral references when pulling up a subque
In-Reply-To: <397371.1732844670@sss.pgh.pa.us>
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