On Tue, 2023-02-14 at 13:06 +0100, Dominique Devienne wrote:
> > Sure, just make sure to use the definition of C that uses UTF-8 encoding
> > (I think it's typically called C.UTF-8).
>
> OK, so for new DBs, sounds like we need to
>
> CREATE DATABASE ... WITH LOCALE 'C.UTF-8' ENCODING UTF8
>
> Correct?
Collations are identifiers, so it has to be double quotes.
The name depends on the operating system; if that is Unix-like,
you can run "locale -a" to get all available locales.
On my system it would be
CREATE DATABASE x TEMPLATE template0 LOCALE "C.utf8" ENCODING UTF8;
> But what about existing DBs? Can the collation be changed a posteriori?
> ALTER DATABASE does not seem to support the same options.
>
> We don't want to have to sprinkle COLLATE "C" all over the place in the code.
> And there are quite a few DBs out there already. What to do about them?
The only option is dump/restore.
A changed collation means changed indexes, so there is no better option.
Yours,
Laurenz Albe
