DROP TABLE IF EXISTS users;
FLUSH GLOBAL STATUS;
CREATE TABLE users (
age INT,
INDEX (age)
) DEFAULT CHARSET=UTF8;
INSERT INTO users (age) VALUES (27);
INSERT INTO users (age) VALUES (28);
INSERT INTO users (age) VALUES (29);
INSERT INTO users (age) VALUES (30);
INSERT INTO users (age) VALUES (31);
INSERT INTO users (age) VALUES (32),(33),(34),(35),(36),(37);
SELECT COUNT(*) FROM users WHERE age < 29;
COUNT(*)
2
SHOW STATUS LIKE 'mroonga_count_skip';
Variable_name	Value
Mroonga_count_skip	1
DROP TABLE users;
