zhztheplayer commented on code in PR #8011:
URL: https://github.com/apache/incubator-gluten/pull/8011#discussion_r1853408564


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backends-velox/src/main/scala/org/apache/gluten/metrics/MetricsUtil.scala:
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@@ -219,6 +216,7 @@ object MetricsUtil extends Logging {
         })
 
     mutNode.updater match {
+      case MetricsUpdater.None =>

Review Comment:
   I see. My impressions about this part of code is:
   
   * When `registerEmptyRelToOperator` is called, a fake operator creation is 
actually emulated so `MetricsUpdator.Todo` should be considered
   * When `child.asInstanceOf[TransformSupport].transform(context)` is used, 
`MetricsUpdator.None` should be considered
   
   Would you like to check whether the two rule apply?
   
   And if we no longer need `MetricsUpdater.None`, we can just remove this type 
of metrics updater.



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