final aggregation over ()
    local exchange (GATHER, SINGLE, [])
        remote exchange (GATHER, SINGLE, [])
            partial aggregation over ()
                join (INNER, REPLICATED):
                    scan customer_demographics
                    local exchange (GATHER, SINGLE, [])
                        remote exchange (REPLICATE, BROADCAST, [])
                            join (INNER, REPLICATED):
                                join (INNER, REPLICATED):
                                    join (INNER, REPLICATED):
                                        scan store_sales
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                scan customer_address (pushdown = true)
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            scan date_dim (pushdown = true)
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPLICATE, BROADCAST, [])
                                        scan store
