Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20024#discussion_r159642789
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
---
@@ -206,6 +206,23 @@ case class Cast(child: Expression, dataType: DataType,
timeZoneId: Option[String
case DateType => buildCast[Int](_, d =>
UTF8String.fromString(DateTimeUtils.dateToString(d)))
case TimestampType => buildCast[Long](_,
t => UTF8String.fromString(DateTimeUtils.timestampToString(t,
timeZone)))
+ case ar: ArrayType =>
--- End diff --
nit: `case ArrayType(et, _)`
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