# File lib/ruport/data/table.rb, line 192
    def column_names=(new_column_names)
      columns = new_column_names.zip(@column_names)
      @column_names.replace(new_column_names.dup)
      unless @data.empty?
        each { |r|
          columns.each_with_index { |x,i|
            if x[1].nil?
              r.rename_attribute(i,x[0])
            elsif x[1] != x[0]
              r.rename_attribute(x[1],x[0],false)
            end
          }
          r.send(:reindex, @column_names)
        }
      end
    end