Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/17348#discussion_r107311172 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala --- @@ -486,14 +486,16 @@ class Analyzer( case Pivot(groupByExprs, pivotColumn, pivotValues, aggregates, child) => val singleAgg = aggregates.size == 1 def outputName(value: Literal, aggregate: Expression): String = { + val scalaValue = CatalystTypeConverters.convertToScala(value.value, value.dataType) + val stringValue = Option(scalaValue).getOrElse("null").toString --- End diff -- The impact is not only on the data type `timestamp`. Any test case to cover `null`?
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