remote exchange (GATHER, SINGLE, [])
    local exchange (GATHER, UNKNOWN, [])
        remote exchange (REPARTITION, ROUND_ROBIN, [])
            cross join:
                join (RIGHT, PARTITIONED):
                    final aggregation over (partkey_15)
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, ["partkey_15"])
                                partial aggregation over (partkey_15)
                                    join (INNER, REPLICATED):
                                        scan partsupp
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                join (INNER, REPLICATED):
                                                    scan supplier
                                                    local exchange (GATHER, SINGLE, [])
                                                        remote exchange (REPLICATE, BROADCAST, [])
                                                            join (INNER, REPLICATED):
                                                                scan nation
                                                                local exchange (GATHER, SINGLE, [])
                                                                    remote exchange (REPLICATE, BROADCAST, [])
                                                                        scan region
                    local exchange (GATHER, SINGLE, [])
                        remote exchange (REPARTITION, HASH, ["partkey"])
                            join (INNER, PARTITIONED):
                                remote exchange (REPARTITION, HASH, ["suppkey_4"])
                                    join (INNER, REPLICATED):
                                        scan partsupp
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan part
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPARTITION, HASH, ["suppkey"])
                                        join (INNER, REPLICATED):
                                            scan supplier
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    join (INNER, REPLICATED):
                                                        scan nation
                                                        local exchange (GATHER, SINGLE, [])
                                                            remote exchange (REPLICATE, BROADCAST, [])
                                                                scan region
                local exchange (GATHER, SINGLE, [])
                    remote exchange (REPLICATE, BROADCAST, [])
                        single aggregation over ()
                            values (1 rows)
