local exchange (GATHER, SINGLE, [])
    remote exchange (GATHER, SINGLE, [])
        final aggregation over (orderdate, orderkey_3, shippriority)
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPARTITION, HASH, ["orderdate", "orderkey_3", "shippriority"])
                    partial aggregation over (orderdate, orderkey_3, shippriority)
                        join (INNER, REPLICATED):
                            scan lineitem
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (REPLICATE, BROADCAST, [])
                                    join (INNER, REPLICATED):
                                        scan orders
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan customer
