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help / color / mirror / Atom feedFrom: David G. Johnston <[email protected]>
To: [email protected]
To: [email protected]
Subject: Re: Index Only Scans with functions
Date: Mon, 6 Jul 2026 08:49:36 -0700
Message-ID: <CAKFQuwZkZb6BXA3ELVQnAZKWk_VL3jcv0ZaQszRq9zRnALJXOA@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
On Mon, Jul 6, 2026 at 8:44 AM PG Doc comments form <[email protected]>
wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/18/indexes-index-only-scans.html
>
> and concludes that an index-only scan is not possible."
>
> I tried to reproduce the behavior, but it used the index (which is good):
>
You haven't demonstrated it using an index ONLY scan which is what that
section is talking about.
> QUERY PLAN
>
> -----------------------------------------------------------------------------------------------------------
> Index Scan using t_i1 on t (cost=0.42..8.69 rows=1 width=4) (actual
> time=0.034..0.035 rows=1.00 loops=1)
>
>
David J.
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Subject: Re: Index Only Scans with functions
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