1 files changed, 18 insertions, 0 deletions
diff --git a/lib/arel/engines/sql/predicates.rb b/lib/arel/engines/sql/predicates.rb
index e9a068fb13..53bac7a2ca 100644
--- a/lib/arel/engines/sql/predicates.rb
+++ b/lib/arel/engines/sql/predicates.rb
@@ -19,6 +19,24 @@ module Arel
     class And < CompoundPredicate
       def predicate_sql; "AND" end
     end
+    
+    class GroupedPredicate < Grouped
+      def to_sql(formatter = nil)
+        "(" + 
+          operands2.inject([]) { |predicates, operand|
+            predicates << operator.new(operand1, operand).to_sql
+          }.join(" #{predicate_sql} ") +
+        ")"
+      end
+    end
+    
+    class Any < GroupedPredicate
+      def predicate_sql; "OR" end
+    end
+    
+    class All < GroupedPredicate
+      def predicate_sql; "AND" end
+    end
 
     class Equality < Binary
       def predicate_sql