Date: Fri, 12 Nov 2021 15:56:25 -0500
From: Bruce Momjian <bruce@momjian.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Cabe Steele <cabesteele@gmail.com>, pgsql-novice@postgresql.org
Subject: Re: Regclass what does reg mean
Message-ID: <20211112205625.GA1956@momjian.us>
References: <22AB959D-AF98-4872-8FB7-7059EF27111E@gmail.com>
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On Fri, Nov 12, 2021 at 03:54:42PM -0500, Tom Lane wrote:
> Cabe Steele <cabesteele@gmail.com> writes:
> > What does reg mean? Regclass regtype, regoper, etc
> 
> The origin is lost in the mists of time --- regproc dates back to
> Berkeley times, and the rest of those were named on its precedent.
> I've always supposed that it meant "registered", as in "entered in
> the system catalogs", but I wasn't there when regproc was invented.
> 
> I wonder if there's any evidence for that ... [ digs ] ... ah-hah,
> ref.cat in the Postgres v4r2 tarball, dated 03/13/94, says
> 
>         POSTGRES Type  Meaning                                 Required
>         ...
>         regproc        registered procedure                    *
> 	...

Wow, nice sleuth work!

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  If only the physical world exists, free will is an illusion.