Add code comment.

apache · Jul 6, 2018 · e67594a · e67594a
1 parent 69c0dde
commit e67594a
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -799,6 +799,7 @@ object ScalaReflection extends ScalaReflection {
    */
   def definedByConstructorParams(tpe: Type): Boolean = cleanUpReflectionObjects {
     tpe.dealias match {
+      // `Option` is a `Product`, but we don't wanna treat `Option[Int]` as a struct type.
       case t if t <:< localTypeOf[Option[_]] => definedByConstructorParams(t.typeArgs.head)
       case _ => tpe.dealias <:< localTypeOf[Product] ||
         tpe.dealias <:< localTypeOf[DefinedByConstructorParams]