Extension:Comments/Comments block table

Schema

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    |                |
+------------------+---------------------+------+-----+---------+----------------+