COUNT(DISTINCT) charset related test

mysql-test/t/ctype_many.test

@@ -137,9 +137,12 @@ SELECT CONVERT(koi8_ru_f USING utf8),MIN(comment),COUNT(*) FROM t1 GROUP BY 1;
 
 ALTER TABLE t1 ADD utf8_f CHAR(32) CHARACTER SET utf8 NOT NULL;
 UPDATE t1 SET utf8_f=CONVERT(koi8_ru_f USING utf8);
-
 SELECT * FROM t1;
 
+ALTER TABLE t1 ADD bin_f CHAR(32) BYTE NOT NULL;
+UPDATE t1 SET bin_f=koi8_ru_f;
+SELECT COUNT(DISTINCT bin_f),COUNT(DISTINCT koi8_ru_f),COUNT(DISTINCT utf8_f) FROM t1;
+
 SELECT koi8_ru_f,MIN(comment) FROM t1 GROUP BY 1;
 SELECT utf8_f,MIN(comment) FROM t1 GROUP BY 1;
 SELECT DISTINCT koi8_ru_f FROM t1;