lib/bmg/algebra.rb in bmg-0.18.0 vs lib/bmg/algebra.rb in bmg-0.18.1

@@ -172,9 +172,10 @@
     end
     protected :_summarize
 
     def transform(transformation = nil, options = {}, &proc)
       transformation, options = proc, (transformation || {}) unless proc.nil?
+      return self if transformation.is_a?(Hash) && transformation.empty?
       _transform(self.type.transform(transformation, options), transformation, options)
     end
 
     def _transform(type, transformation, options)
       Operator::Transform.new(type, self, transformation, options)