Extension:OpenStackManager/openstack notification event table

mysql> describe openstack_notification_event;
+---------------------+----------------+------+-----+---------+-------+
| Field               | Type           | Null | Key | Default | Extra |
+---------------------+----------------+------+-----+---------+-------+
| event_action        | varbinary(10)  | YES  | MUL | NULL    |       |
| event_actor_id      | int(10)        | YES  |     | NULL    |       |
| event_instance_host | varbinary(255) | YES  |     | NULL    |       |
| event_instance_name | varbinary(255) | YES  |     | NULL    |       |
| event_project       | varbinary(255) | YES  |     | NULL    |       |
+---------------------+----------------+------+-----+---------+-------+