'Update the put_timestamp.  Only modifies it if it is greater than
the current timestamp.
:param timestamp: internalized put timestamp'

def update_put_timestamp(self, timestamp):

    with self.get() as conn:
        conn.execute(('UPDATE    %s_stat    SET    put_timestamp    =    ?    WHERE    put_timestamp    <    ?' % self.db_type), (timestamp, timestamp))
        conn.commit()
