Extension:Approved Revs/approved revs table

mysql> describe approved_revs; +---+---+--+-+-+---+ +---+---+--+-+-+---+ +---+---+--+-+-+---+
 * Field        | Type      | Null | Key | Default | Extra |
 * page_id      | int(11)   | YES  | UNI | NULL    |       |
 * rev_id       | int(11)   | YES  |     | NULL    |       |
 * approver_id  | int(11)   | NO   |     | 0       |       |
 * approval_date | timestamp | YES |     | NULL    |       |