On Wed, 2023-04-26 at 21:20 +0000, PG Doc comments form wrote: > Page: https://www.postgresql.org/docs/15/collation.html > > This page states: > > Observe how in the traditional ICU locale naming system, the root locale > is selected by an empty string. > > CREATE COLLATION latinlast (provider = icu, locale = > 'en-u-kr-grek-latn'); > CREATE COLLATION latinlast (provider = icu, locale = > 'en@colReorder=grek-latn'); > > Neither of the locales are empty strings.
The sentence with the "empty string" refers to the example that was before: CREATE COLLATION "und-u-co-emoji-x-icu" (provider = icu, locale = '@collation=emoji'); There is nothing, that is an ampty string, before the "@". Yours, Laurenz Albe