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, PARTITIONED):
                                        remote exchange (REPARTITION, HASH, ["i_item_sk"])
                                            scan item (pushdown = true)
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPARTITION, HASH, ["ss_item_sk"])
                                                join (INNER, REPLICATED):
                                                    scan store_sales
                                                    local exchange (GATHER, SINGLE, [])
                                                        remote exchange (REPLICATE, BROADCAST, [])
                                                            scan date_dim (pushdown = true)
