040000 tree a24545afe347df4ce6042f7b6d1e3b50e9e82316	Filter
040000 tree be16de79a57775404bcc4e30db0f16ade7b9ae0c	aggregation
040000 tree bc90efa15e54b0aac1c805b2e5fc08c7d2942388	join
040000 tree 2b92dd66564e80cb13f3ae579ab4d3b70fa03627	projection
040000 tree 4ea92d45f0d3b2e7ebba7a98a74a17fd2c800af3	sp
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