Re: pg_plan_advice

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Lukas Fittl <lukas(at)fittl(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Jacob Champion <jacob(dot)champion(at)enterprisedb(dot)com>, Dian Fay <di(at)nmfay(dot)com>, Matheus Alcantara <matheusssilv97(at)gmail(dot)com>, Jakub Wartak <jakub(dot)wartak(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: pg_plan_advice
Date: 2026-01-29 13:35:43
Message-ID: CA+TgmoaUfjdBrWD_ZnTkBduUKMkOLdchOjr9wy4phVJB7SFi=g@mail.gmail.com
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On Thu, Jan 29, 2026 at 12:45 AM Lukas Fittl <lukas(at)fittl(dot)com> wrote:
> The indirect relationship between those functions doesn't seem great
> (i.e. anything that gets read in cost_material has to be initialized
> in materialize_finished_plan). What if we just zero initialize the
> dummy Path structure instead, like in the attached?

This might be the right answer, but I didn't want to add more memory
zeroing than needed without discussion, so I have just pushed a
minimal fix for now. Thanks for the analysis.

--
Robert Haas
EDB: http://www.enterprisedb.com

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