[GitHub] [spark] sarutak commented on a change in pull request #28037: [SPARK-31271][UI] fix web ui for driver side SQL metrics

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sarutak commented on a change in pull request #28037: [SPARK-31271][UI] fix web ui for driver side SQL metrics
URL: https://github.com/apache/spark/pull/28037#discussion_r398812067
 
 

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 File path: sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
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 @@ -180,18 +178,18 @@ object SQLMetrics {
       numberFormat.format(values.sum)
     } else if (metricsType == AVERAGE_METRIC) {
       val validValues = values.filter(_ > 0)
-      val Seq(min, med, max) = {
-        val metric = if (validValues.isEmpty) {
-          val zeros = Seq.fill(3)(0L)
-          zeros.map(v => toNumberFormat(v))
-        } else {
+      if (validValues.length <= 1) {
+        toNumberFormat(validValues.headOption.getOrElse(0))
 
 Review comment:
   It's not obvious that this is for the case of driver so can we leave a comment for the readability?

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