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From: David Rowley <[email protected]>
To: SATYANARAYANA NARLAPURAM <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Paul A Jungwirth <[email protected]>
Subject: Re: [PATCH] Allow SJE to recognize GiST-backed temporal primary keys
Date: Wed, 22 Apr 2026 13:54:33 +1200
Message-ID: <CAApHDvqKOSZ+ZacOc8B4WE0i70w97Ji_74KRmTf5Uf5dQX1ncA@mail.gmail.com> (raw)
In-Reply-To: <CAHg+QDeXwdOzrmb-sSATK4whbyhOgzyCGN+bY=YXU9qOzJaWSg@mail.gmail.com>
References: <CAHg+QDeXwdOzrmb-sSATK4whbyhOgzyCGN+bY=YXU9qOzJaWSg@mail.gmail.com>

On Wed, 22 Apr 2026 at 07:18, SATYANARAYANA NARLAPURAM
<[email protected]> wrote:
> relation_has_unique_index_for() checks whether join clause equality
> operators belong to the index's opfamily via mergeopfamilies.  Since
> mergeopfamilies only lists btree opfamilies, this check always fails
> for GiST-backed unique indexes such as those created by PRIMARY KEY
> with WITHOUT OVERLAPS, preventing self-join elimination.

Please add to the 20-1 CF [1].

David

[1] https://commitfest.postgresql.org/59/

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