module Arel
  module Visitors
    class MySQL < Arel::Visitors::ToSql
      def visit_Arel_Nodes_UpdateStatement o
        [
          "UPDATE #{visit o.relation}",
          ("SET #{o.values.map { |value| visit value }.join ', '}" unless o.values.empty?),
          ("WHERE #{o.wheres.map { |x| visit x }.join ' AND '}" unless o.wheres.empty?),
          ("ORDER BY #{o.orders.map { |x| visit x }.join(', ')}" unless o.orders.empty?),
          ("LIMIT #{o.limit}" if o.limit),
        ].compact.join ' '
      end

    end
  end
end