mysql> describe Comments_block;
+------------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------------+---------------------+------+-----+---------+----------------+
| cb_id | int(11) | NO | PRI | NULL | auto_increment |
| cb_actor | bigint(20) unsigned | NO | MUL | NULL | |
| cb_actor_blocked | bigint(20) unsigned | NO | | NULL | |
| cb_date | datetime | YES | | NULL | |
+------------------+---------------------+------+-----+---------+----------------+
