this looks like it ought to do it; now to add tests

Author: doriantaylor

lib/rdf/changeset.rb

@@ -156,6 +156,12 @@ def delete_statement(statement)
       self.deletes << statement
     end
 
+    # This simply returns its argument as an array in order to trick
+    # {RDF::Mutable#delete} into working.
+    def query stmt
+      [stmt]
+    end
+
     undef_method :load, :update, :clear
   end # Changeset
 end # RDF

lib/rdf/repository.rb

@@ -340,7 +340,14 @@ def each_statement(&block)
       # @see Mutable#apply_changeset
       def apply_changeset(changeset)
         data = @data
-        changeset.deletes.each { |del| data = delete_from(data, del) }
+        changeset.deletes.each do |del|
+          if del.constant?
+            data = delete_from(data, del)
+          else
+            # we need this condition to handle wildcard statements
+            query_pattern(del) { |stmt| data = delete_from(data, stmt) }
+          end
+        end
         changeset.inserts.each { |ins| data = insert_to(data, ins) }
         @data = data
       end