change_order_direction

# File activerecord/lib/active_record/connection_adapters/sqlserver_adapter.rb, line 560
        def change_order_direction(order)
          order.split(",").collect {|fragment|
            case fragment
              when  /\bDESC\b/i     then fragment.gsub(/\bDESC\b/i, "ASC")
              when  /\bASC\b/i      then fragment.gsub(/\bASC\b/i, "DESC")
              else                  String.new(fragment).split(',').join(' DESC,') + ' DESC'
            end
          }.join(",")
        end