# File lib/innodb/data_type.rb, line 349
    def self.parse_roll_pointer(roll_ptr)
      {
        :is_insert  => read_bits_at_offset(roll_ptr, 1, 55) == 1,
        :rseg_id    => read_bits_at_offset(roll_ptr, 7, 48),
        :undo_log   => {
          :page   => read_bits_at_offset(roll_ptr, 32, 16),
          :offset => read_bits_at_offset(roll_ptr, 16, 0),
        }
      }
    end