RE: Order changes in PG16 since ICU introduction - Mailing list pgsql-hackers

> > CREATE DATABASE test TEMPLATE=template0 ENCODING = 'UTF8'
> LC_COLLATE = 'C'
> > LC_CTYPE = 'C';
> 
> As has been pointed out already, setting LC_COLLATE/LC_CTYPE is
> meaningless when the locale provider is ICU.  You need to look at what ICU
> locale is being chosen, or force it with LOCALE = 'C'.
> 
>             regards, tom lane

Okay got it was on IRC with RhodiumToad and he suggested:

CREATE DATABASE test2 TEMPLATE=template0 ENCODING = 'UTF8' LC_COLLATE = 'C'
LC_CTYPE = 'C' ICU_LOCALE='C';

Which gives expected result:
SELECT '+'  <  '-'  ;  -- true

 but gives me a notice:
NOTICE:  using standard form "en-US-u-va-posix" for locale "C"