remote exchange (GATHER, SINGLE, [])
    local exchange (GATHER, UNKNOWN, [])
        remote exchange (REPARTITION, ROUND_ROBIN, [])
            final aggregation over (i_brand, i_brand_id, t_hour, t_minute)
                local exchange (GATHER, SINGLE, [])
                    remote exchange (REPARTITION, HASH, ["i_brand", "i_brand_id", "t_hour", "t_minute"])
                        partial aggregation over (i_brand, i_brand_id, t_hour, t_minute)
                            join (INNER, REPLICATED):
                                join (INNER, REPLICATED):
                                    remote exchange (REPARTITION, ROUND_ROBIN, [])
                                        join (INNER, REPLICATED):
                                            scan web_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    scan date_dim
                                        join (INNER, REPLICATED):
                                            scan catalog_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    scan date_dim
                                        join (INNER, REPLICATED):
                                            scan store_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    scan date_dim
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            scan item
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPLICATE, BROADCAST, [])
                                        scan time_dim
