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From: David Rowley <[email protected]>
To: Jean-Christophe BOGGIO <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: Why isn't PG using an index-only scan?
Date: Thu, 18 Sep 2025 23:32:01 +1200
Message-ID: <CAApHDvrQxSO8SJGHqiRuhuSacy5idavz4EkKKfW76qaELHKSOg@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<CAApHDvoUdvw68oHnfACQE=u8XPJ+Te49dZsfC2yW+DVfzdT2+Q@mail.gmail.com>
	<[email protected]>

On Thu, 18 Sept 2025 at 19:45, Jean-Christophe BOGGIO
<[email protected]> wrote:
> Ok but then why is it doing it on the AD table? Is it because of the
> number of rows?

It's hard to tell as I don't have a clear view on which columns are
from which tables.  Perhaps "ad" can Index Only Scan because all of
the columns required are in an index but with "oeu" there's a column
being used that's not indexed?

David

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