code: def rdd(self):
          
          if self._lazy_rdd is None:
              jrdd = self._jdf.javaToPython()
              self._lazy_rdd = RDD(jrdd, self.sql_ctx._sc, BatchedSerializer(PickleSerializer()))
          return self._lazy_rdd
docs: Returns the content as an :class:`pyspark.RDD` of :class:`Row`.