local exchange (GATHER, SINGLE, [])
    remote exchange (GATHER, SINGLE, [])
        final aggregation over (i_item_id, w_warehouse_name)
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPARTITION, HASH, ["i_item_id", "w_warehouse_name"])
                    partial aggregation over (i_item_id, w_warehouse_name)
                        join (INNER, REPLICATED):
                            join (INNER, REPLICATED):
                                join (INNER, REPLICATED):
                                    scan inventory
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            scan item
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPLICATE, BROADCAST, [])
                                        scan date_dim
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (REPLICATE, BROADCAST, [])
                                    scan warehouse
