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From: Alexander Lakhin <[email protected]>
To: Robert Haas <[email protected]>
To: Tom Lane <[email protected]>
Cc: Lukas Fittl <[email protected]>
Cc: Andrei Lepikhov <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: pg_plan_advice
Date: Sun, 5 Apr 2026 15:00:00 +0300
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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	<[email protected]>

05.04.2026 11:00, Alexander Lakhin wrote:
> I and SQLsmith have discovered one more anomaly (reproduced starting from
> e0e4c132e):
> load 'test_plan_advice';
> select object_type from
>  (select object_type from information_schema.element_types limit 1),
>  lateral
>  (select sum(1) over (partition by a) from generate_series(1, 2) g(a) where false);
>
> triggers an internal error:
> ERROR:  XX000: no rtoffset for plan unnamed_subquery
> LOCATION:  pgpa_plan_walker, pgpa_walker.c:110

And another error, which might be interesting to you:
CREATE EXTENSION tsm_system_time;
CREATE TABLE t(i int);
SELECT 1 FROM (SELECT i FROM t TABLESAMPLE system_time (1000)), LATERAL (SELECT i LIMIT 1);

ERROR:  XX000: plan node has no RTIs: 378
LOCATION:  pgpa_build_scan, pgpa_scan.c:200

Best regards,
Alexander





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