local exchange (GATHER, SINGLE, [])
    remote exchange (GATHER, SINGLE, [])
        final aggregation over (acctbal, address, comment_4, custkey_3, name, name_7, phone)
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPARTITION, HASH, [acctbal, address, comment_4, custkey_3, name, name_7, phone])
                    partial aggregation over (acctbal, address, comment_4, custkey_3, name, name_7, phone)
                        join (INNER, PARTITIONED):
                            remote exchange (REPARTITION, HASH, [orderkey])
                                scan lineitem
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (REPARTITION, HASH, [orderkey_0])
                                    join (INNER, REPLICATED):
                                        join (INNER, PARTITIONED):
                                            remote exchange (REPARTITION, HASH, [custkey_3])
                                                scan customer
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPARTITION, HASH, [custkey])
                                                    scan orders
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan nation
