Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20163#discussion_r161363023
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/python/EvaluatePython.scala
---
@@ -144,6 +145,7 @@ object EvaluatePython {
}
case StringType => (obj: Any) => nullSafeConvert(obj) {
+ case _: Calendar => null
case _ => UTF8String.fromString(obj.toString)
--- End diff --
Oh, I didn't see the comment above when I write my comment.
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