Horton

Re: [BUG?] check_exclusion_or_unique_constraint false negative

Amit Kapila <amit.kapila16@gmail.com>

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From: Amit Kapila <amit.kapila16@gmail.com>
To: Mihail Nikalayeu <mihailnikalayeu@gmail.com>
Cc: "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>, Peter Geoghegan <pg@bowt.ie>, "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>, Andres Freund <andres@anarazel.de>
Date: 2025-08-25T05:02:12Z
Lists: pgsql-hackers 
On Fri, Aug 22, 2025 at 9:12 PM Mihail Nikalayeu
<mihailnikalayeu@gmail.com> wrote:
>
> Amit, a few more explanations related to your message.
>
> > IIUC, the problem you are worried about can happen with DELETE+INSERT
> > in the same transaction on the subscriber, right?
>
> Technically, yes - this can occur during a single UPDATE, as well as a
> DELETE followed by an INSERT of the same key within the same
> transaction (which is effectively equivalent to an UPDATE).
>

BTW, then isn't it possible that INSERT happens on a different page?

-- 
With Regards,
Amit Kapila.

Commits

  1. Add support for INSERT ... ON CONFLICT DO NOTHING/UPDATE.