From: Tom Lane <tgl@sss.pgh.pa.us>
To: christianmduta@gmail.com
Cc: pgsql-bugs@postgresql.org
Subject: Re: BUG #14924: Subquery in VALUES inside recursive CTE
Date: Fri, 24 Nov 2017 12:06:26 -0500
Message-ID: <29657.1511543186@sss.pgh.pa.us> (raw)
In-Reply-To: <20171124120836.1463.5310@wrigleys.postgresql.org>
References: <20171124120836.1463.5310@wrigleys.postgresql.org>
christianmduta@gmail.com writes:
> When working with recursive CTEs, I had the following happen:
Thanks for the report! Seems not to be specific to CTEs:
regression=# SELECT val.x
FROM generate_series(1,10) AS s(i),
LATERAL (
VALUES
((SELECT s.i + 1)),
(s.i + 1)
) AS val(x)
WHERE s.i < 10;
ERROR: SubPlan found with no parent plan
However, simplifying further, this works:
regression=# SELECT val.x
FROM generate_series(1,10) AS s(i),
LATERAL (
VALUES
((SELECT 1 + 1)),
(s.i + 1)
) AS val(x)
WHERE s.i < 10;
so it looks like it's the LATERAL reference inside the sub-select
that is needed to trigger the bug.
Same results back to 9.3 :-(
regards, tom lane
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To: pgsql-bugs@postgresql.org
Cc: tgl@sss.pgh.pa.us, christianmduta@gmail.com
Subject: Re: BUG #14924: Subquery in VALUES inside recursive CTE
In-Reply-To: <29657.1511543186@sss.pgh.pa.us>
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