final aggregation over ()
    local exchange (GATHER, SINGLE, [])
        remote exchange (GATHER, SINGLE, [])
            partial aggregation over ()
                join (INNER, REPLICATED):
                    join (INNER, REPLICATED):
                        scan web_sales
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPLICATE, BROADCAST, [])
                                join (INNER, PARTITIONED):
                                    final aggregation over (ws_item_sk_3)
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPARTITION, HASH, [ws_item_sk_3])
                                                partial aggregation over (ws_item_sk_3)
                                                    join (INNER, REPLICATED):
                                                        scan web_sales
                                                        local exchange (GATHER, SINGLE, [])
                                                            remote exchange (REPLICATE, BROADCAST, [])
                                                                scan date_dim
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPARTITION, HASH, [i_item_sk])
                                            scan item
                    local exchange (GATHER, SINGLE, [])
                        remote exchange (REPLICATE, BROADCAST, [])
                            scan date_dim
