def merge_timestamps(self, created_at, put_timestamp, delete_timestamp):
        with self.get() as conn:
            old_status = self._is_deleted(conn)
            conn.execute('''
                UPDATE %s_stat SET created_at=MIN(?, created_at),
                                   put_timestamp=MAX(?, put_timestamp),
                                   delete_timestamp=MAX(?, delete_timestamp)
            ''' % self.db_type, (created_at, put_timestamp, delete_timestamp))
            if old_status != self._is_deleted(conn):
                timestamp = Timestamp(time.time())
                self._update_status_changed_at(conn, timestamp.internal)

            conn.commit()
Removes all edges from this graph.
dataset/ETHPy150Open openstack/swift/swift/common/db.py/DatabaseBroker.merge_timestamps--crossover with--dataset/ETHPy150Open charanpald/APGL/apgl/graph/SparseGraph.py/SparseGraph.removeAllEdges