resolving bk problems

mysql-test/r/func_group.result

@@ -514,7 +514,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 explain 
 select min(a1) from t1 where a1 != 'KKK';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	PRIMARY	3	NULL	14	Using where; Using index
+1	SIMPLE	t1	range	PRIMARY	PRIMARY	3	NULL	14	Using where; Using index
 explain
 select max(a3) from t1 where a2 < 2 and a3 < 'SEA';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
@@ -560,7 +560,7 @@ explain
 select concat(min(t1.a1),min(t2.a4)) from t1, t2 where t2.a4 <> 'AME';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	NULL	PRIMARY	3	NULL	14	Using index
-1	SIMPLE	t2	index	NULL	k2	4	NULL	6	Using where; Using index
+1	SIMPLE	t2	range	k2	k2	4	NULL	6	Using where; Using index
 drop table t1, t2;
 CREATE TABLE t1 (a int, b int);
 select count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1;