Re: Collation & ctype method table, and extension hooks

On 12.06.25 07:49, Jeff Davis wrote:
> On Fri, 2025-02-07 at 11:19 -0800, Jeff Davis wrote:
>>
>> Attached v15. Just a rebase.
>
> Attached v16.
>
>> * commit this on the grounds that it's a desirable code improvement
>> and
>> the worst-case regression isn't a major concern; or
>
> I plan to commit this soon after branching. There's a general consensus
> that enabling multi-lib provider support is a good idea, and turning
> the provider behavior into method tables is a prerequisite for that. I
> doubt the performance issue will be a serious concern and I don't see a
> good way to avoid it.

Patch 0001 and 0002 seem okay to me.

I wish we could take this further and also run the "ctype is c" case
through the method table. Right now, there are still a bunch of
open-coded special cases all over the place, which could be unified. I
guess this isn't any worse than before, but maybe this could be a future
project?

Patch 0003 I don't understand. It replaces type safety by no type
safety, and it doesn't have any explanation or comments. I suppose you
have further plans in this direction, but until we have seen those and
have more clarification and explanation, I would hold this back.

Patch 0004 seems ok. But maybe you could explain this better in the
commit message, like remove includes from pg_locale.h but instead put
them in the .c files as needed, and explain why this is possible or
suitable now.