Major Description
Add the following test case to DatasetSuite to reproduce this issue:
object OuterObject {
case class InnerClass(a: String)
}
test("foo") {
OuterScopes.addOuterScope(OuterObject)
Seq(OuterObject.InnerClass("foo")).toDS()
}
Exception thrown:
org.apache.spark.sql.AnalysisException: Unable to generate an encoder for inner class `org.apache.spark.sql.OuterObject$InnerClass` without access to the scope that this class was defined in.
The reason is that an inner class within a Scala object is translated into a static nested class, and no outer scope is needed. But the analyzer still thinks there should be an outer scope.
