Re: Update Unicode data to Unicode 16.0.0

On Tue, 2024-11-19 at 13:42 -0800, Jeff Davis wrote:
> On Tue, 2024-11-12 at 10:40 +0100, Laurenz Albe wrote:
> > I want to reiterate what I said in the above thread:
> > If that means that indexes on strings using the "builtin" collation
> > provider need to be reindexed after an upgrade, I am very much
> > against it.
> 
> How would you feel if there was a better way to "lock down" the
> behavior using an extension?

Better.

> I have a patchset here:
> 
> https://www.postgresql.org/message-id/78a1b434ff40510dc5aaabe986299a09f4da90cf.camel%40j-davis.com
> 
> that changes the implementation of collation and ctype to use method
> tables rather than branching, and it also introduces some hooks that
> can be used to replace the method tables with whatever you want.

That looks like a nice idea, since it obviates the need to build
PostgreSQL yourself if you want to use a non-standard copy of - say -
the ICU library.  You still have to build your own ICU library, though.

I had hoped that the builtin provider would remove the need to REINDEX,
but I have given up that hope.  Peter's argument is sound from a
conceptual point of view, even though I doubt that the average user
will be able to appreciate it.

Yours,
Laurenz Albe