THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
AQL+ is a superset of AQL and were used to generate multi-stages fuzzy-join plan during the optimization. The current issues and refactoring proposal can be found in the following document.
https://docs.google.com/presentation/d/1_y1jtxms3qff4Pm5VHf8YHq-DZaknLNS4oD93y0KtDM/edit?usp=sharing