final aggregation over ()
    local exchange (GATHER, SINGLE, [])
        remote exchange (GATHER, SINGLE, [])
            partial aggregation over ()
                local exchange (GATHER, SINGLE, [])
                    semijoin (PARTITIONED):
                        semijoin (PARTITIONED):
                            remote exchange (REPARTITION, HASH, ["ws_order_number"])
                                join (INNER, REPLICATED):
                                    join (INNER, REPLICATED):
                                        join (INNER, REPLICATED):
                                            scan web_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    scan customer_address
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan date_dim
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            scan web_site
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (REPARTITION, HASH, ["ws_order_number_17"])
                                    join (INNER, PARTITIONED):
                                        remote exchange (REPARTITION, HASH, ["ws_order_number_17"])
                                            scan web_sales
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPARTITION, HASH, ["ws_order_number_51"])
                                                scan web_sales
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, ["wr_order_number"])
                                join (INNER, PARTITIONED):
                                    remote exchange (REPARTITION, HASH, ["wr_order_number"])
                                        join (INNER, REPLICATED):
                                            scan web_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    scan web_returns
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPARTITION, HASH, ["ws_order_number_141"])
                                            scan web_sales
