Re: COLLATION update in 13.1

On Mon, 2025-02-24 at 13:07 +0100, Matthias Apitz wrote:
> Thanks. I did \l before which gives:
>
>                                                   List of databases
>     Name    |  Owner   | Encoding |   Collate   |    Ctype    | ICU Locale | Locale Provider |   Access privileges
> ------------+----------+----------+-------------+-------------+------------+-----------------+-----------------------
>  bar        | foo      | UTF8     | de_DE.UTF-8 | de_DE.UTF-8 |            | libc            |
>  customers  | sisis    | UTF8     | de_DE.UTF-8 | de_DE.UTF-8 |            | libc            |
> ...
>
> But why the ALTER statement needs the spelling different as the output of \l :
>
> sisis=# ALTER COLLATION "de_DE.UTF-8" REFRESH VERSION;
> ERROR:  collation "de_DE.UTF-8" for encoding "UTF8" does not exist
>
> sisis=# ALTER COLLATION "de_DE.utf8" REFRESH VERSION;
> NOTICE:  version has not changed
> ALTER COLLATION

Yes, that is annoying. You can use other collation names in CREATE DATABASE
than the ones in pg_collation. You have to choose the name that is used in
pg_collation, which is probably "de_DE.utf8".

Really, they refer to the same collation.

Yours,
Laurenz Albe

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