local exchange (GATHER, SINGLE, [])
    remote exchange (GATHER, SINGLE, [])
        final aggregation over (i_category, i_category_id)
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPARTITION, HASH, [i_category, i_category_id])
                    partial aggregation over (i_category, i_category_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
