szehon-ho commented on code in PR #51091:
URL: https://github.com/apache/spark/pull/51091#discussion_r2153120948
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/MergeRowsExec.scala:
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@@ -233,6 +246,7 @@ case class MergeRowsExec(
}
}
+ longMetric("numTargetRowsCopied") += 1
Review Comment:
@juliuszsompolski @aokolnychyi added two metrics (I feel its more clear this
way to capture the nuance of delta vs group based merge), let me know if it
looks better?
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