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SELECT collname FROM pg_collation WHERE collname ILIKE 'ru%'; create or replace function ab(p1 text, p2 text) returns text language plpgsql stable security definer as $$ declare s text := upper(p1); begin raise notice 'p1: %', collation for (p1); return s; end; $$; select ab('Бородач_приедет_в_гости eng', session_user); select ab('Бородач_приедет_в_гости eng' collate "C", session_user); select ab('Бородач_приедет_в_гости eng' collate "ru-x-icu", session_user); select ab('Бородач_приедет_в_гости eng' collate "ru-x-icu", 'session_user'); select session_user, * from pg_database where datname = current_catalog;

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