def results_column(name)
      @results.compact.map do |rs|
        rs.map { |r| r[name] || r[name[0...-1].intern] }
      end.flatten
    end
def results_column(name)
      @results.compact.map do |rs|
        rs.map { |r| r[name] || r[name[0...-1].intern] }
      end.flatten
    end
Fetch a list of values from the results set given by name