lib/rgviz_rails/adapters/postgresql_adapter.rb in rgviz-rails-0.30 vs lib/rgviz_rails/adapters/postgresql_adapter.rb in rgviz-rails-0.31

@@ -60,9 +60,16 @@
         visitor << ")"
       when ScalarFunctionColumn::Lower
         visitor << "lower("
         node.arguments[0].accept visitor
         visitor << ")"
+      when ScalarFunctionColumn::Concat
+        visitor << "("
+        node.arguments.each_with_index do |arg, i|
+          visitor << " || " if i > 0
+          arg.accept visitor
+        end
+        visitor << ")"
       end
     end
   end
 end