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Re: Interesting case of IMMUTABLE significantly hurting performance

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Subject: Re: Interesting case of IMMUTABLE significantly hurting performance
From: Laurenz Albe <laurenz.albe@xxxxxxxxxxx>
Date: Fri, 11 Apr 2025 07:15:44 +0200
Cc: Nico Williams <nico@xxxxxxxxxxxxxxxx>, Adrian Klaver <adrian.klaver@xxxxxxxxxxx>, Olleg Samoylov <splarv@xxxxx>, "pgsql-generallists.postgresql.org" <pgsql-general@xxxxxxxxxxxxxxxxxxxx>
In-reply-to: <CAHyXU0ypfKJ6LmEWJHKF63m5UEcZwB5gny3DWGQygvVeePM8mw@mail.gmail.com>
References: <662101e2-5ca5-4bf5-9307-2519efde8690@ya.ru> <8687df7d49bc4b28b41c7cf4e9ad1e15d383b2fa.camel@cybertec.at> <Z/bk5E6pqIBWTF3j@ubby> <c857b827-3a17-4600-aa98-d0710216ccfe@aklaver.com> <Z/foWNmbdDOWH6/M@ubby> <CAKFQuwa-H6ZzST_dFNhviqQ8b4fPfLT+o3btfygrVOxQJhgWNQ@mail.gmail.com> <CAHyXU0ypfKJ6LmEWJHKF63m5UEcZwB5gny3DWGQygvVeePM8mw@mail.gmail.com>
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On Thu, 2025-04-10 at 22:18 -0500, Merlin Moncure wrote:
> Facts.  This is black magic.   This has come up over and over. 

Perhaps it would help to add the excellent information from the Wiki to the documentation:
https://wiki.postgresql.org/wiki/Inlining_of_SQL_functions

Yours,
Laurenz Albe

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