cloud-fan commented on a change in pull request #32944:
URL: https://github.com/apache/spark/pull/32944#discussion_r662517806
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/simpleCosting.scala
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@@ -38,7 +38,7 @@ case class SimpleCost(value: Long) extends Cost {
* A simple implementation of [[CostEvaluator]], which counts the number of
* [[ShuffleExchangeLike]] nodes in the plan.
*/
-object SimpleCostEvaluator extends CostEvaluator {
+case class SimpleCostEvaluator() extends CostEvaluator {
Review comment:
This can still be an object, if we follow
https://github.com/apache/spark/pull/32944/files#r662513062
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