Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/10431#discussion_r48251442
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
---
@@ -380,7 +380,7 @@ object ScalaReflection extends ScalaReflection {
val clsName = getClassNameFromType(tpe)
val walkedTypePath = s"""- root class: "${clsName}"""" :: Nil
extractorFor(inputObject, tpe, walkedTypePath) match {
- case s: CreateNamedStruct => s
+ case expressions.If(IsNull(_), expressions.Literal(null, _), s:
CreateNamedStruct) => s
--- End diff --
how about checking the type?
```
case i: expressions.If if tpe <:< localTypeOf[Product] =>
i.falseValue.asInstanceOf[CreateNamedStruct]
```
it looks safer to me.
as option of product will also
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