local exchange (GATHER, SINGLE, [])
    remote exchange (GATHER, SINGLE, [])
        final aggregation over (i_item_id, w_state)
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPARTITION, HASH, [i_item_id, w_state])
                    partial aggregation over (i_item_id, w_state)
                        join (INNER, REPLICATED):
                            join (INNER, REPLICATED):
                                join (INNER, REPLICATED):
                                    join (LEFT, PARTITIONED):
                                        remote exchange (REPARTITION, HASH, [cs_item_sk, cs_order_number])
                                            scan catalog_sales
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPARTITION, HASH, [cr_item_sk, cr_order_number])
                                                scan catalog_returns
                                    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
