Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/11316#discussion_r53736140
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/ObjectType.scala ---
@@ -23,8 +23,10 @@ private[sql] object ObjectType extends AbstractDataType {
override private[sql] def defaultConcreteType: DataType =
throw new UnsupportedOperationException("null literals can't be casted
to ObjectType")
- // No casting or comparison is supported.
- override private[sql] def acceptsType(other: DataType): Boolean = false
+ override private[sql] def acceptsType(other: DataType): Boolean = other
match {
+ case ObjectType(_) => true
--- End diff --
should we also compare the `Class[_]`?
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