SET DEFAULT_STORAGE_ENGINE='tokudb';
DROP TABLE IF EXISTS t1;
create table t1 (a int, b int) engine=tokudb;
insert into t1 values (1,1),(1,2),(2,1),(2,2);
select count(*) from t1 where b > 0;
count(*)
4
alter table t1 add clustering index b(b);
explain select count(*) from t1 where b > 0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	NA	b	b	5	NA	NA	NA
select count(*) from t1 where b > 0;
count(*)
4
DROP TABLE t1;