Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22785#discussion_r226977895
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
---
@@ -171,7 +171,7 @@ object RowEncoder {
if (inputObject.nullable) {
If(IsNull(inputObject),
- Literal.create(null, inputType),
+ Literal.create(null, nonNullOutput.dataType),
--- End diff --
what's the difference?
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