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help / color / mirror / Atom feedFrom: David G. Johnston <[email protected]>
To: Nico Williams <[email protected]>
Cc: Adrian Klaver <[email protected]>
Cc: Laurenz Albe <[email protected]>
Cc: Olleg Samoylov <[email protected]>
Cc: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: Interesting case of IMMUTABLE significantly hurting performance
Date: Thu, 10 Apr 2025 08:59:05 -0700
Message-ID: <CAKFQuwa-H6ZzST_dFNhviqQ8b4fPfLT+o3btfygrVOxQJhgWNQ@mail.gmail.com> (raw)
In-Reply-To: <Z/foWNmbdDOWH6/M@ubby>
References: <[email protected]>
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On Thu, Apr 10, 2025 at 8:49 AM Nico Williams <[email protected]> wrote:
> On Wed, Apr 09, 2025 at 02:43:11PM -0700, Adrian Klaver wrote:
> > On 4/9/25 14:21, Nico Williams wrote:
> > > That to_char is not immutable is not documented though. Though it's
> > > clear when looking at the docs for the `jsonb_.*_tz()` functions.
> >
> > From here:
> >
> > https://www.postgresql.org/docs/current/catalog-pg-proc.html
> >
> > select proname, provolatile, prosrc from pg_proc where
> proname='to_char';
> > [...]
>
> I'm surprised to see that counted as docs, but good to know.
>
>
Consulting pg_proc constitutes, IMO, going outside the documentation to
retrieve information. It is just not high up on anyone's annoyance list to
try and get this piece of information incorporated into the documentation.
Partly because \df+ does show this information as well, so at least one
doesn't have to go write the catalog query themself.
David J.
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Subject: Re: Interesting case of IMMUTABLE significantly hurting performance
In-Reply-To: <CAKFQuwa-H6ZzST_dFNhviqQ8b4fPfLT+o3btfygrVOxQJhgWNQ@mail.gmail.com>
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