[GitHub] hvanhovell commented on a change in pull request #23391: [SPARK-26456][SQL] Cast date/timestamp to string by Date/TimestampFormatter

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hvanhovell commented on a change in pull request #23391: [SPARK-26456][SQL] Cast date/timestamp to string by Date/TimestampFormatter
URL: https://github.com/apache/spark/pull/23391#discussion_r244414371
 
 

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 File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
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 @@ -230,12 +230,15 @@ case class Cast(child: Expression, dataType: DataType, timeZoneId: Option[String
   // [[func]] assumes the input is no longer null because eval already does the null check.
   @inline private[this] def buildCast[T](a: Any, func: T => Any): Any = func(a.asInstanceOf[T])
 
+  private val dateFormatter = DateFormatter()
 
 Review comment:
   Why is this not lazy?

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