local exchange (GATHER, SINGLE, [])
    remote exchange (GATHER, SINGLE, [])
        local exchange (GATHER, SINGLE, [])
            remote exchange (REPARTITION, HASH, ["expr_10", "expr_9"])
                final aggregation over (groupid, i_category$gid, i_class$gid)
                    local exchange (REPARTITION, HASH, ["groupid", "i_category$gid", "i_class$gid"])
                        remote exchange (REPARTITION, HASH, ["groupid", "i_category$gid", "i_class$gid"])
                            partial aggregation over (groupid, i_category$gid, i_class$gid)
                                join (INNER, REPLICATED):
                                    join (INNER, REPLICATED):
                                        scan web_sales
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan date_dim
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            scan item
