performance enhancements

3 files changed, 12 insertions, 12 deletions

diff --git a/lib/arel/primitives/attribute.rb b/lib/arel/primitives/attribute.rb
index 011b751a1d..ca1d31ffcf 100644
--- a/lib/arel/primitives/attribute.rb
+++ b/lib/arel/primitives/attribute.rb
@@ -30,11 +30,11 @@ module Arel
     end
     
     def ==(other)
-      Attribute   == other.class     and
-      name        == other.name      and
-      @alias      == other.alias     and
-      ancestor    == other.ancestor  and
-      relation    == other.relation
+      Attribute   === other           and
+      name        ==  other.name      and
+      @alias      ==  other.alias     and
+      ancestor    ==  other.ancestor  and
+      relation    ==  other.relation
     end
 
     def original_relation
diff --git a/lib/arel/primitives/expression.rb b/lib/arel/primitives/expression.rb
index 696e3521be..9afafcce2f 100644
--- a/lib/arel/primitives/expression.rb
+++ b/lib/arel/primitives/expression.rb
@@ -17,11 +17,11 @@ module Arel
     end
     
     def ==(other)
-      Expression    == other.class          and
-      attribute     == other.attribute      and
-      function_sql  == other.function_sql   and
-      ancestor      == other.ancestor       and
-      @alias        == other.alias
+      Expression    === other                and
+      attribute     ==  other.attribute      and
+      function_sql  ==  other.function_sql   and
+      ancestor      ==  other.ancestor       and
+      @alias        ==  other.alias
     end
     
     module Transformations
diff --git a/lib/arel/primitives/value.rb b/lib/arel/primitives/value.rb
index b4bddd0b0c..4509f13d17 100644
--- a/lib/arel/primitives/value.rb
+++ b/lib/arel/primitives/value.rb
@@ -17,8 +17,8 @@ module Arel
     end
     
     def ==(other)
-      Value == other.class and
-      value == other.value
+      Value === other and
+      value ==  other.value
     end
     
     def bind(relation)