lib/bmg/algebra.rb in bmg-0.18.5 vs lib/bmg/algebra.rb in bmg-0.18.6

@@ -181,18 +181,36 @@
     def _transform(type, transformation, options)
       Operator::Transform.new(type, self, transformation, options)
     end
     protected :_transform
 
+    def ungroup(attrs)
+      _ungroup self.type.ungroup(attrs), attrs
+    end
+
+    def _ungroup(type, attrs)
+      Operator::Ungroup.new(type, self, attrs)
+    end
+    protected :_ungroup
+
     def union(other, options = {})
       return self if other.is_a?(Relation::Empty)
       _union self.type.union(other.type), other, options
     end
 
     def _union(type, other, options)
       Operator::Union.new(type, [self, other], options)
     end
     protected :_union
+
+    def unwrap(attrs)
+      _unwrap self.type.unwrap(attrs), attrs
+    end
+
+    def _unwrap(type, attrs)
+      Operator::Unwrap.new(type, self, attrs)
+    end
+    protected :_unwrap
 
     def spied(spy)
       return self if spy.nil?
       Relation::Spied.new(self, spy)
     end