2 files changed, 7 insertions, 3 deletions
diff --git a/lib/arel/primitives/attribute.rb b/lib/arel/primitives/attribute.rb
index 7021e9f9ed..6cb558d8ce 100644
--- a/lib/arel/primitives/attribute.rb
+++ b/lib/arel/primitives/attribute.rb
@@ -120,8 +120,8 @@ module Arel
     include Predications
 
     module Expressions
-      def count
-        Expression.new(self, "COUNT")
+      def count(distinct = false)
+        distinct ?  Expression.new(self, "DISTINCT").count :  Expression.new(self, "COUNT")
       end
 
       def sum
diff --git a/lib/arel/primitives/value.rb b/lib/arel/primitives/value.rb
index 36a7fb7c71..9c6e518a95 100644
--- a/lib/arel/primitives/value.rb
+++ b/lib/arel/primitives/value.rb
@@ -6,7 +6,11 @@ module Arel
 
 
     def to_sql(formatter = Sql::WhereCondition.new(relation))
-      formatter.value value
+      if value =~ /^\(.*\)$/
+        value
+      else
+        formatter.value value
+      end
     end
 
     def format(object)