Rename this cached relation to new_relation.
        Note that this will change the output of key(), all refs must be
        updated!

        :param _CachedRelation new_relation: The new name to apply to the
            relation

def rename(self, new_relation):
        """Rename this cached relation to new_relation.
        Note that this will change the output of key(), all refs must be
        updated!

        :param _CachedRelation new_relation: The new name to apply to the
            relation
        """
        # Relations store this stuff inside their `path` dict. But they
        # also store a table_name, and usually use it in their  .render(),
        # so we need to update that as well. It doesn't appear that
        # table_name is ever anything but the identifier (via .create())
        self.inner = self.inner.incorporate(
            path={
                'database': new_relation.inner.database,
                'schema': new_relation.inner.schema,
                'identifier': new_relation.inner.identifier
            },
            table_name=new_relation.inner.identifier
        )