Re: Use CASEFOLD() internally rather than LOWER()

On Tue, 2026-01-13 at 10:14 +0800, Chao Li wrote:
> 1 - 0001
> ```
> +SELECT U&'straße' ILIKE U&'STRASSE' COLLATE PG_C_UTF8;
> ```
>
> Do we want to added one more test:
> ```
> SELECT U&'straße' ILIKE U&'STRASSE' COLLATE PG_UNICODE_FAST;
>  ?column?
> ----------
>  t
> (1 row)
> ```
> Which tests the different behaviors against collations.

I am confused, doesn't the patch already have both of those tests for
both collations? What change are you suggesting?

> I initially thought to add test cases with different collations, but
> after debugging, I found that citext intentionally ignores specified
> collation.

Adding a test that's dependent on the database-wide collation is more
heavyweight because it needs to create a new database.

Regards,
Jeff Davis