040000 tree 4795f1a56fba3f4f27650694e98b58581c9fcc7b	aggregation
040000 tree ec5e0057ed47b8262536d645b0b4f0f74038441d	filter
040000 tree bc90efa15e54b0aac1c805b2e5fc08c7d2942388	join
040000 tree 2b92dd66564e80cb13f3ae579ab4d3b70fa03627	projection
040000 tree 4ea92d45f0d3b2e7ebba7a98a74a17fd2c800af3	sp
040000 tree 074ed47ae10cf37692e48cfab878c85ee94f8f3e	temporal