Extension:Approved Revs/approved revs files table

mysql> describe approved_revs_files;
+--------------------+----------------+------+-----+---------+-------+
| Field              | Type           | Null | Key | Default | Extra |
+--------------------+----------------+------+-----+---------+-------+
| file_title         | varbinary(255) | NO   | PRI | NULL    |       |
| approved_timestamp | binary(14)     | NO   |     | NULL    |       |
| approved_sha1      | varbinary(32)  | NO   |     | NULL    |       |
+--------------------+----------------+------+-----+---------+-------+