local exchange (GATHER, SINGLE, [])
    remote exchange (GATHER, SINGLE, [])
        join (INNER, PARTITIONED):
            remote exchange (REPARTITION, HASH, [ss_customer_sk])
                join (INNER, PARTITIONED):
                    final aggregation over (ss_customer_sk, ss_item_sk)
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, [ss_customer_sk, ss_item_sk])
                                partial aggregation over (ss_customer_sk, ss_item_sk)
                                    join (INNER, REPLICATED):
                                        join (LEFT, PARTITIONED):
                                            remote exchange (REPARTITION, HASH, [ss_item_sk, ss_ticket_number])
                                                scan store_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPARTITION, HASH, [sr_item_sk, sr_ticket_number])
                                                    scan store_returns
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan date_dim
                    final aggregation over (ws_bill_customer_sk, ws_item_sk)
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, [ws_bill_customer_sk, ws_item_sk])
                                partial aggregation over (ws_bill_customer_sk, ws_item_sk)
                                    join (INNER, REPLICATED):
                                        join (LEFT, PARTITIONED):
                                            remote exchange (REPARTITION, HASH, [ws_item_sk, ws_order_number])
                                                scan web_sales
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPARTITION, HASH, [wr_item_sk, wr_order_number])
                                                    scan web_returns
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan date_dim
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPARTITION, HASH, [cs_bill_customer_sk])
                    final aggregation over (cs_bill_customer_sk, cs_item_sk)
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, [cs_bill_customer_sk, cs_item_sk])
                                partial aggregation over (cs_bill_customer_sk, cs_item_sk)
                                    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 date_dim
