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):
                                scan time_dim (pushdown = true)
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPLICATE, BROADCAST, [])
                                        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 (pushdown = true)
                                                join (INNER, REPLICATED):
                                                    scan catalog_sales
                                                    local exchange (GATHER, SINGLE, [])
                                                        remote exchange (REPLICATE, BROADCAST, [])
                                                            scan date_dim (pushdown = true)
                                                join (INNER, REPLICATED):
                                                    scan store_sales
                                                    local exchange (GATHER, SINGLE, [])
                                                        remote exchange (REPLICATE, BROADCAST, [])
                                                            scan date_dim (pushdown = true)
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    scan item (pushdown = true)
