# File lib/innodb/history_list.rb, line 34
    def undo_record
      unless @undo_record_cursor
        return nil
      end

      if rec = @undo_record_cursor.undo_record
        return rec
      end

      case @direction
      when :forward
        next_undo_record
      when :backward
        prev_undo_record
      end
    end