CREATE EXTENSION unaccent; -- must have a UTF8 database SELECT getdatabaseencoding(); SET client_encoding TO 'KOI8'; SELECT unaccent('foobar'); SELECT unaccent('L肆'); SELECT unaccent('出殡'); SELECT unaccent('unaccent', 'foobar'); SELECT unaccent('unaccent', 'L肆'); SELECT unaccent('unaccent', '出殡'); SELECT ts_lexize('unaccent', 'foobar'); SELECT ts_lexize('unaccent', 'L肆'); SELECT ts_lexize('unaccent', '出殡');