remote exchange (GATHER, SINGLE, [])
    local exchange (GATHER, UNKNOWN, [])
        remote exchange (REPARTITION, ROUND_ROBIN, [])
            join (INNER, REPLICATED):
                join (INNER, PARTITIONED):
                    remote exchange (REPARTITION, HASH, [suppkey])
                        dynamic filter (suppkey::EQUAL)
                            scan supplier
                    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_7)
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPARTITION, HASH, [suppkey_7])
                                                    partial aggregation over (suppkey_7)
                                                        scan lineitem
