cross join:
    cross join:
        cross join:
            cross join:
                cross join:
                    final aggregation over ()
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (GATHER, SINGLE, [])
                                partial aggregation over ()
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPARTITION, HASH, ["ss_list_price"])
                                            scan store_sales
                    final aggregation over ()
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (GATHER, SINGLE, [])
                                partial aggregation over ()
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPARTITION, HASH, ["ss_list_price_27"])
                                            scan store_sales
                final aggregation over ()
                    local exchange (GATHER, SINGLE, [])
                        remote exchange (GATHER, SINGLE, [])
                            partial aggregation over ()
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPARTITION, HASH, ["ss_list_price_68"])
                                        scan store_sales
            final aggregation over ()
                local exchange (GATHER, SINGLE, [])
                    remote exchange (GATHER, SINGLE, [])
                        partial aggregation over ()
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (REPARTITION, HASH, ["ss_list_price_109"])
                                    scan store_sales
        final aggregation over ()
            local exchange (GATHER, SINGLE, [])
                remote exchange (GATHER, SINGLE, [])
                    partial aggregation over ()
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPARTITION, HASH, ["ss_list_price_150"])
                                scan store_sales
    final aggregation over ()
        local exchange (GATHER, SINGLE, [])
            remote exchange (GATHER, SINGLE, [])
                partial aggregation over ()
                    local exchange (GATHER, SINGLE, [])
                        remote exchange (REPARTITION, HASH, ["ss_list_price_191"])
                            scan store_sales
