avantgardnerio commented on code in PR #2196:
URL: 
https://github.com/apache/datafusion-ballista/pull/2196#discussion_r3697018078


##########
ballista/scheduler/src/state/aqe/optimizer_rule/distributed_exchange.rs:
##########
@@ -90,11 +93,36 @@ impl DistributedExchangeRule {
                 );
                 return Ok(Transformed::yes(Arc::new(exchange_exec)));
             }
+        } else if !execution_plan.is::<ExchangeExec>()
+            && let [child] = execution_plan.children().as_slice()

Review Comment:
   Edit: now with explicit `cross-stage cut coordination is not yet 
implemented` until this is implemented.



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