DROP TABLE IF EXISTS t1;
Warnings:
Note	1051	Unknown table 'test.t1'
CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET utf8 COLLATE utf8_croatian_ci, KEY(a)) ENGINE=ARIA;
INSERT INTO t1 VALUES ('na'),('nj'),('nz'),('Z');
explain SELECT a FROM t1 ORDER BY a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	a	33	NULL	4	Using index
SELECT a FROM t1 ORDER BY a;
a
na
nz
nj
Z
ALTER TABLE t1 engine=myisam;
explain SELECT a FROM t1 ORDER BY a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	a	33	NULL	4	Using index
SELECT a FROM t1 ORDER BY a;
a
na
nz
nj
Z
drop table t1;