final hashaggregation over ()
    local exchange (GATHER, SINGLE, [])
        remote exchange (GATHER, SINGLE, [])
            partial hashaggregation over ()
                local exchange (GATHER, SINGLE, [])
                    semijoin (PARTITIONED):
                        remote exchange (REPARTITION, HASH, ["ws_order_number"])
                            semijoin (REPLICATED):
                                join (INNER, REPLICATED):
                                    join (INNER, REPLICATED):
                                        join (INNER, REPLICATED):
                                            scan web_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    scan customer_address (pushdown = true)
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan date_dim (pushdown = true)
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            scan web_site (pushdown = true)
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPLICATE, BROADCAST, [])
                                        single hashaggregation over (ws_order_number_20)
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPARTITION, HASH, ["ws_order_number_20"])
                                                    scan web_sales
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, ["wr_order_number"])
                                join (INNER, REPLICATED):
                                    scan web_returns
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            single hashaggregation over (ws_order_number_105)
                                                local exchange (GATHER, SINGLE, [])
                                                    remote exchange (REPARTITION, HASH, ["ws_order_number_105"])
                                                        scan web_sales
