cloud-fan commented on code in PR #51285:
URL: https://github.com/apache/spark/pull/51285#discussion_r2415485479
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/MergeRowsExec.scala:
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@@ -257,4 +272,27 @@ case class MergeRowsExec(
null
}
}
+
+ // For group based merge, copy is inserted if row matches no other case
+ private def incrementCopyMetric(): Unit = longMetric("numTargetRowsCopied")
+= 1
Review Comment:
yea I agree
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