drop table if exists t2970;
Warnings:
Note	1051	Unknown table 't2970'
create table t2970 (a int, b int, c int, d int, key(a), key(a,b));
insert into t2970 values (1,1,1,1),(1,2,3,4);
explain select a,count(b),max(b) from t2970 where a > 0 group by a order by a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2970	index	a,a_2	a_2	10	NULL	2	Using where; Using index
alter table t2970 engine=tokudb;
explain select a,count(b),max(b) from t2970 where a > 0 group by a order by a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2970	index	a,a_2	a_2	10	NULL	2	Using where; Using index
drop table t2970;