remote exchange (GATHER, SINGLE, [])
    local exchange (GATHER, UNKNOWN, [])
        remote exchange (REPARTITION, ROUND_ROBIN, [])
            join (INNER, REPLICATED):
                scan supplier
                local exchange (GATHER, SINGLE, [])
                    remote exchange (REPLICATE, BROADCAST, [])
                        join (INNER, REPLICATED):
                            final aggregation over (suppkey_0)
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPARTITION, HASH, ["suppkey_0"])
                                        partial aggregation over (suppkey_0)
                                            scan lineitem
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (REPLICATE, BROADCAST, [])
                                    final aggregation over ()
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (GATHER, SINGLE, [])
                                                partial aggregation over ()
                                                    final aggregation over (suppkey_16)
                                                        local exchange (GATHER, SINGLE, [])
                                                            remote exchange (REPARTITION, HASH, ["suppkey_16"])
                                                                partial aggregation over (suppkey_16)
                                                                    scan lineitem
