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()
:see: Expression.constants()
dataset/ETHPy150Open openstack/swift/swift/common/db.py/DatabaseBroker.update_put_timestamp--crossover with--dataset/ETHPy150Open nltk/nltk/nltk/sem/logic.py/FunctionVariableExpression.constants