# File lib/dbd_msql/Msql.rb, line 155
  def fetch
    res = @res_handle.fetch_row
    if res.nil?
      @row_pos = nil 
    else
      @row_pos += 1 unless @row_pos.nil?
    end
    res
  rescue MyError => err
    raise DBI::DatabaseError.new(err.message)
  end