docs: def add_namespace_statistics(self, namespace, offset, data_points,
                                   byte_count):
          """Update namespace statistics for the period identified by
          offset"""
          self.cursor.execute(
              'INSERT INTO gauged_statistics VALUES (%s,%s,%s,%s) ON DUPLICATE '
              'KEY UPDATE data_points = data_points + VALUES(data_points),'
              'byte_count = byte_count + VALUES(byte_count)',
              (namespace, offset, data_points, byte_count))