+--------------+------------+----------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table        | Non_unique | Key_name       | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+--------------+------------+----------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| history_uint |          1 | history_uint_1 |            1 | itemid      | A         |     9673971 |     NULL | NULL   |      | BTREE      |         |               |
| history_uint |          1 | history_uint_1 |            2 | clock       | A         |  1189898520 |     NULL | NULL   |      | BTREE      |         |               |
+--------------+------------+----------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+