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');