remote exchange (GATHER, SINGLE, [])
    local exchange (GATHER, UNKNOWN, [])
        remote exchange (REPARTITION, ROUND_ROBIN, [])
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPARTITION, HASH, [i_class])
                    final aggregation over (i_category, i_class, i_current_price, i_item_desc, i_item_id)
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, [i_category, i_class, i_current_price, i_item_desc, i_item_id])
                                partial aggregation over (i_category, i_class, i_current_price, i_item_desc, i_item_id)
                                    join (INNER, REPLICATED):
                                        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
