# File lib/search_cop/visitors/postgres.rb, line 27
      def visit_SearchCopGrammar_Attributes_Collection(node)
        res = node.attributes.collect do |attribute|
          if attribute.options[:coalesce]
            "COALESCE(#{visit attribute}, '')"
          else
            visit attribute
          end
        end

        res.join(" || ' ' || ")
      end