brkyvz commented on code in PR #36871:
URL: https://github.com/apache/spark/pull/36871#discussion_r906394689


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/csv/CSVInferSchema.scala:
##########
@@ -169,6 +178,16 @@ class CSVInferSchema(val options: CSVOptions) extends 
Serializable {
   private def tryParseDouble(field: String): DataType = {
     if ((allCatch opt field.toDouble).isDefined || isInfOrNan(field)) {
       DoubleType
+    } else if (options.inferDate) {
+      tryParseDateTime(field)
+    } else {
+      tryParseTimestampNTZ(field)
+    }
+  }
+
+  private def tryParseDateTime(field: String): DataType = {
+    if ((allCatch opt dateFormatter.parse(field)).isDefined) {

Review Comment:
   This is a very expensive way



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