Message-ID: <fb9796bd-9c22-4588-8979-aa9b8cf1232a@gmail.com>
Date: Sun, 5 Apr 2026 15:00:00 +0300
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Subject: Re: pg_plan_advice
From: Alexander Lakhin <exclusion@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>
Cc: Lukas Fittl <lukas@fittl.com>, Andrei Lepikhov <lepihov@gmail.com>,
 PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
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 <CA+TgmoZ-Jh1T6QyWoCODMVQdhTUPYkaZjWztzP1En4=ZHoKPzw@mail.gmail.com>
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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