public CloseableIteration<BindingSet, QueryEvaluationException> evaluate(Order node, BindingSet bindings)
throws QueryEvaluationException
{
ValueComparator vcmp = new ValueComparator();
OrderComparator cmp = new OrderComparator(this, node, vcmp);
return new OrderIterator(evaluate(node.getArg(), bindings), cmp);
}