mysql> describe mathindex;
+-----------+------------------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+------------------+------+-----+-------------------+-----------------------------+
| pageid | int(10) unsigned | NO | PRI | NULL | |
| anchor | int(6) unsigned | NO | PRI | NULL | |
| inputhash | varbinary(16) | NO | MUL | NULL | |
| timestamp | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
+-----------+------------------+------+-----+-------------------+-----------------------------+
