results = _factory.order(_exps[0], results, ctx, params);
            results = _factory.distinct(_exps[0], coll == null, results);
            ResultObjectProvider rop = new ListResultObjectProvider(results);
            if (range.start != 0 || range.end != Long.MAX_VALUE)
                rop = new RangeResultObjectProvider(rop, range.start,range.end);
            return rop;
        }