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From: Laurenz Albe <[email protected]>
To: Karsten Hilbert <[email protected]>
To: [email protected]
Subject: Re: DROP COLLATION vs pg_collation question
Date: Wed, 12 Jun 2024 09:03:02 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On Tue, 2024-06-11 at 23:15 +0200, Karsten Hilbert wrote:
> maybe a naive question but I was unable to find an answer in
> the fine manual (sv_SE being an example)
> 
> Does running
> 
> 	DROP COLLATION IF EXISTS pg_catalog."sv_SE"
> 
> also remove the corresponding row from pg_collation (assuming
> nothing depends on collation sv_SE) ?
> 
> Experimentation seems to hint that way but I was unable to
> confirm.

Yes, that will delete a row from "pg_collation".  System catalogs
like "pg_collation" is where the database metadata are actually
stored.

Note that with DROP COLLATION you can only remove collations
that belong to the encoding of your current database.

Yours,
Laurenz Albe

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