Re: BUG #19484: Segmentation fault triggered by FDW

From: Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com>
To: Amit Langote <amitlangote09(at)gmail(dot)com>
Cc: Matheus Alcantara <matheusssilv97(at)gmail(dot)com>, Ayush Tiwari <ayushtiwari(dot)slg01(at)gmail(dot)com>, Rafia Sabih <rafia(dot)pghackers(at)gmail(dot)com>, 798604270(at)qq(dot)com, pgsql-bugs(at)lists(dot)postgresql(dot)org, Amit Langote <amitlan(at)postgresql(dot)org>
Subject: Re: BUG #19484: Segmentation fault triggered by FDW
Date: 2026-06-18 10:50:59
Message-ID: CAPmGK16fALJqbyR1Oir7-TsN8k_yAR-JcOg5nWOUmDmivTmDtA@mail.gmail.com
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Amit-san,

On Thu, Jun 18, 2026 at 6:16 PM Amit Langote <amitlangote09(at)gmail(dot)com> wrote:
> A small clarification on this one: the patch makes no changes to
> postgres_fdw code, only adds a regression test. The bug, which I
> introduced, is in how nodeModifyTable.c supplies fdw_private from the
> pruned/validated fdwPrivLists in ModifyTableState rather than the
> original list in ModifyTable, so the postgres_fdw side itself is
> unchanged. The substantive change is the executor re-indexing.

Thanks for the clarification!

> Still holding off on committing per our exchange, but no rush given
> you may want to prioritize the v19 open items. Happy to go ahead
> whenever, or wait for your comments.

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