2 files changed, 8 insertions, 0 deletions
diff --git a/lib/sql_algebra/relations/attribute.rb b/lib/sql_algebra/relations/attribute.rb
index 85d40dfb12..89ac495245 100644
--- a/lib/sql_algebra/relations/attribute.rb
+++ b/lib/sql_algebra/relations/attribute.rb
@@ -5,6 +5,10 @@ class Attribute
     @relation, @attribute_name, @aliaz = relation, attribute_name, aliaz
   end
   
+  def aliazz(aliaz)
+    Attribute.new(relation, attribute_name, aliaz)
+  end
+  
   def eql?(other)
     relation == other.relation and attribute_name == other.attribute_name
   end
diff --git a/lib/sql_algebra/relations/relation.rb b/lib/sql_algebra/relations/relation.rb
index 8c21927d01..02723ae0cc 100644
--- a/lib/sql_algebra/relations/relation.rb
+++ b/lib/sql_algebra/relations/relation.rb
@@ -32,6 +32,10 @@ class Relation
     def order(*attributes)
       OrderRelation.new(self, *attributes)
     end
+    
+    def rename(attribute, aliaz)
+      RenameRelation.new(self, attribute, aliaz)
+    end
   end
   include Operations