DROP TABLE IF EXISTS running_records;
CREATE TABLE running_records (
name VARCHAR(255),
average TIME(1) NULL,
KEY average_index(average)
) DEFAULT CHARSET=utf8mb4;
INSERT INTO running_records VALUES ("zero condition", "00:00:00.0");
INSERT INTO running_records VALUES ("record failure", NULL);
SELECT mroonga_command("index_column_diff --table running_records#average_index --name index");
mroonga_command("index_column_diff --table running_records#average_index --name index")
[]
SELECT * FROM running_records WHERE average = "00:00:00.0";
name	average
zero condition	00:00:00.0
record failure	00:00:00.0
DROP TABLE running_records;
