# File lib/innodb/undo_log.rb, line 68
    def initialize(undo_log, offset, direction=:forward)
      @initial = true
      @undo_log = undo_log
      @offset = offset
      @direction = direction

      case offset
      when :min
        @undo_record = @undo_log.min_undo_record
      when :max
        raise "Not implemented"
      else
        @undo_record = @undo_log.undo_record(offset)
      end
    end