remote exchange (GATHER, SINGLE, [])
    local exchange (GATHER, UNKNOWN, [])
        remote exchange (REPARTITION, ROUND_ROBIN, [])
            final aggregation over (expr_24, name_15, name_19)
                local exchange (GATHER, SINGLE, [])
                    remote exchange (REPARTITION, HASH, ["expr_24", "name_15", "name_19"])
                        partial aggregation over (expr_24, name_15, name_19)
                            join (INNER, PARTITIONED):
                                remote exchange (REPARTITION, HASH, ["orderkey"])
                                    join (INNER, REPLICATED):
                                        scan lineitem
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                join (INNER, REPLICATED):
                                                    scan supplier
                                                    local exchange (GATHER, SINGLE, [])
                                                        remote exchange (REPLICATE, BROADCAST, [])
                                                            scan nation
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPARTITION, HASH, ["orderkey_3"])
                                        join (INNER, PARTITIONED):
                                            remote exchange (REPARTITION, HASH, ["custkey"])
                                                scan orders
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPARTITION, HASH, ["custkey_6"])
                                                    join (INNER, REPLICATED):
                                                        scan customer
                                                        local exchange (GATHER, SINGLE, [])
                                                            remote exchange (REPLICATE, BROADCAST, [])
                                                                scan nation
