dongjoon-hyun commented on a change in pull request #28554:
URL: https://github.com/apache/spark/pull/28554#discussion_r426297105



##########
File path: 
sql/core/src/main/scala/org/apache/spark/sql/execution/stat/StatFunctions.scala
##########
@@ -264,7 +264,6 @@ object StatFunctions extends Logging {
     }
 
     val selectedCols = ds.logicalPlan.output
-      .filter(a => a.dataType.isInstanceOf[NumericType] || 
a.dataType.isInstanceOf[StringType])

Review comment:
       Shall we remove `Even something less common such as arrays are 
sortable:` and its example in the PR description?




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