Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17569#discussion_r110510765
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
---
@@ -356,7 +361,8 @@ object ScalaReflection extends ScalaReflection {
udt.userClass.getAnnotation(classOf[SQLUserDefinedType]).udt(),
Nil,
dataType =
ObjectType(udt.userClass.getAnnotation(classOf[SQLUserDefinedType]).udt()))
- Invoke(obj, "deserialize", ObjectType(udt.userClass), getPath ::
Nil)
+ Invoke(obj, "deserialize", ObjectType(udt.userClass), getPath ::
Nil,
--- End diff --
The `deserialize` is totally implemented by users, can we guarantee not
return null?
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