From: Peter Eisentraut <peter@eisentraut.org>
To: David G. Johnston <david.g.johnston@gmail.com>
To: y.saburov@gmail.com <y.saburov@gmail.com>
To: pgsql-docs@lists.postgresql.org <pgsql-docs@lists.postgresql.org>
Subject: Re: generated constraint name
Date: Thu, 10 Apr 2025 16:11:42 +0200
Message-ID: <8fd70ac1-9eb2-49bf-bdb4-dd2b12beb25e@eisentraut.org> (raw)
In-Reply-To: <CAKFQuwZn3KTfC75+3u8W31CtJNnUcs5ZQQGUG=wcQW3FLSvx1Q@mail.gmail.com>
References: <174393459040.678.17810152410419444783@wrigleys.postgresql.org>
<CAKFQuwZn3KTfC75+3u8W31CtJNnUcs5ZQQGUG=wcQW3FLSvx1Q@mail.gmail.com>
On 07.04.25 15:34, David G. Johnston wrote:
> On Sunday, April 6, 2025, PG Doc comments form <noreply@postgresql.org
> <mailto:noreply@postgresql.org>> wrote:
>
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/17/ddl-alter.html <https://
> www.postgresql.org/docs/17/ddl-alter.html>
> Description:
>
> url:
> https://www.postgresql.org/docs/current/ddl-alter.html#DDL-ALTER-
> REMOVING-A-CONSTRAINT <https://www.postgresql.org/docs/current/ddl-
> alter.html#DDL-ALTER-REMOVING-A-CONSTRAINT>
>
> (If you are dealing with a generated constraint name like $2, don't
> forget
> that you'll need to double-quote it to make it a valid identifier.)
>
> If I have a constraint with the name $2, are there other constraints
> with
> names $1, $3 ... ?
>
>
> I feel like that whole parenthetical should just go away. The point of
> the comment is to remind the user of how identifier values work with
> respect to mandatory double quoting. The name itself, other than having
> a $, has no special importance.
I think generated constraint names were generally "$1", "$2", etc. at
some point, instead of the more readable ones you get today. But this
must be ancient.
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Cc: peter@eisentraut.org, david.g.johnston@gmail.com, y.saburov@gmail.com, pgsql-docs@lists.postgresql.org
Subject: Re: generated constraint name
In-Reply-To: <8fd70ac1-9eb2-49bf-bdb4-dd2b12beb25e@eisentraut.org>
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