peter-toth commented on a change in pull request #24742: [SPARK-27881][SQL]
Support CAST (... FORMAT <pattern>) expression
URL: https://github.com/apache/spark/pull/24742#discussion_r289420719
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
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@@ -238,10 +245,50 @@ case class Cast(child: Expression, dataType: DataType,
timeZoneId: Option[String
private lazy val dateFormatter = DateFormatter()
private lazy val timestampFormatter =
TimestampFormatter.getFractionFormatter(zoneId)
+ private lazy val customDateFormatter: DateFormatter = format.map { f =>
+ try {
+ DateFormatter(f)
+ } catch {
+ case NonFatal(_) => null
Review comment:
Ok fixed. But these formatters are lazy so only during execution is an
exception raised and caught and the casted result will be null.
Should we catch the wrong pattern during analysis?
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