Github user rednaxelafx commented on a diff in the pull request:
https://github.com/apache/spark/pull/20163#discussion_r161287717
--- 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 --
I was pounding on that yesterday, too... somehow I have this feeling that
no matter which direction we take, there's no good answer to type mismatch
situations.
Let's say if we blacklist more types, should we document the list so that
it's clear what will definitely NOT work?
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