remote exchange (GATHER, SINGLE, [])
    cross join:
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                                                                scan reason (pushdown = true)
                                                                local exchange (GATHER, SINGLE, [])
                                                                    remote exchange (REPLICATE, BROADCAST, [])
                                                                        final aggregation over ()
                                                                            local exchange (GATHER, SINGLE, [])
                                                                                remote exchange (GATHER, SINGLE, [])
                                                                                    partial aggregation over ()
                                                                                        scan store_sales (pushdown = true)
                                                            local exchange (GATHER, SINGLE, [])
                                                                remote exchange (REPLICATE, BROADCAST, [])
                                                                    final aggregation over ()
                                                                        local exchange (GATHER, SINGLE, [])
                                                                            remote exchange (GATHER, SINGLE, [])
                                                                                partial aggregation over ()
                                                                                    scan store_sales (pushdown = true)
                                                        local exchange (GATHER, SINGLE, [])
                                                            remote exchange (REPLICATE, BROADCAST, [])
                                                                final aggregation over ()
                                                                    local exchange (GATHER, SINGLE, [])
                                                                        remote exchange (GATHER, SINGLE, [])
                                                                            partial aggregation over ()
                                                                                scan store_sales (pushdown = true)
                                                    local exchange (GATHER, SINGLE, [])
                                                        remote exchange (REPLICATE, BROADCAST, [])
                                                            final aggregation over ()
                                                                local exchange (GATHER, SINGLE, [])
                                                                    remote exchange (GATHER, SINGLE, [])
                                                                        partial aggregation over ()
                                                                            scan store_sales (pushdown = true)
                                                local exchange (GATHER, SINGLE, [])
                                                    remote exchange (REPLICATE, BROADCAST, [])
                                                        final aggregation over ()
                                                            local exchange (GATHER, SINGLE, [])
                                                                remote exchange (GATHER, SINGLE, [])
                                                                    partial aggregation over ()
                                                                        scan store_sales (pushdown = true)
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (REPLICATE, BROADCAST, [])
                                                    final aggregation over ()
                                                        local exchange (GATHER, SINGLE, [])
                                                            remote exchange (GATHER, SINGLE, [])
                                                                partial aggregation over ()
                                                                    scan store_sales (pushdown = true)
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (REPLICATE, BROADCAST, [])
                                                final aggregation over ()
                                                    local exchange (GATHER, SINGLE, [])
                                                        remote exchange (GATHER, SINGLE, [])
                                                            partial aggregation over ()
                                                                scan store_sales (pushdown = true)
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (REPLICATE, BROADCAST, [])
                                            final aggregation over ()
                                                local exchange (GATHER, SINGLE, [])
                                                    remote exchange (GATHER, SINGLE, [])
                                                        partial aggregation over ()
                                                            scan store_sales (pushdown = true)
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (REPLICATE, BROADCAST, [])
                                        final aggregation over ()
                                            local exchange (GATHER, SINGLE, [])
                                                remote exchange (GATHER, SINGLE, [])
                                                    partial aggregation over ()
                                                        scan store_sales (pushdown = true)
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (REPLICATE, BROADCAST, [])
                                    final aggregation over ()
                                        local exchange (GATHER, SINGLE, [])
                                            remote exchange (GATHER, SINGLE, [])
                                                partial aggregation over ()
                                                    scan store_sales (pushdown = true)
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (REPLICATE, BROADCAST, [])
                                final aggregation over ()
                                    local exchange (GATHER, SINGLE, [])
                                        remote exchange (GATHER, SINGLE, [])
                                            partial aggregation over ()
                                                scan store_sales (pushdown = true)
                    local exchange (GATHER, SINGLE, [])
                        remote exchange (REPLICATE, BROADCAST, [])
                            final aggregation over ()
                                local exchange (GATHER, SINGLE, [])
                                    remote exchange (GATHER, SINGLE, [])
                                        partial aggregation over ()
                                            scan store_sales (pushdown = true)
                local exchange (GATHER, SINGLE, [])
                    remote exchange (REPLICATE, BROADCAST, [])
                        final aggregation over ()
                            local exchange (GATHER, SINGLE, [])
                                remote exchange (GATHER, SINGLE, [])
                                    partial aggregation over ()
                                        scan store_sales (pushdown = true)
            local exchange (GATHER, SINGLE, [])
                remote exchange (REPLICATE, BROADCAST, [])
                    final aggregation over ()
                        local exchange (GATHER, SINGLE, [])
                            remote exchange (GATHER, SINGLE, [])
                                partial aggregation over ()
                                    scan store_sales (pushdown = true)
        local exchange (GATHER, SINGLE, [])
            remote exchange (REPLICATE, BROADCAST, [])
                final aggregation over ()
                    local exchange (GATHER, SINGLE, [])
                        remote exchange (GATHER, SINGLE, [])
                            partial aggregation over ()
                                scan store_sales (pushdown = true)
