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From: Nico Williams <nico@cryptonector.com>
To: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: Merlin Moncure <mmoncure@gmail.com>
Cc: David G. Johnston <david.g.johnston@gmail.com>
Cc: Adrian Klaver <adrian.klaver@aklaver.com>
Cc: Olleg Samoylov <splarv@ya.ru>
Cc: pgsql-generallists.postgresql.org <pgsql-general@lists.postgresql.org>
Subject: Re: Interesting case of IMMUTABLE significantly hurting performance
Date: Fri, 11 Apr 2025 00:30:38 -0500
Message-ID: <Z/io/n/EQkzbBK2L@ubby> (raw)
In-Reply-To: <9e5296eaa15b8f531a8e1190bca3f98cffa3262d.camel@cybertec.at>
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>
	<9e5296eaa15b8f531a8e1190bca3f98cffa3262d.camel@cybertec.at>

On Fri, Apr 11, 2025 at 07:15:44AM +0200, Laurenz Albe wrote:
> 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

Adding a warning in the functions _docs_ to check their various
attributes in the cataclog would suffice.





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