code: def rename(self, node):
          
          child_object = self.translate(node.child)
          from_block = '({child}) AS {name}({attributes})'.format(
              child=child_object.to_sql(), name=node.name,
              attributes=', '.join(node.attributes.names))
          return self.query(str(node.attributes), from_block=from_block)
docs: Translate a rename node into SQLQuery.
          :param node: a treebrd node
          :return: a SQLQuery object for the tree rooted at node