Hello, I've a very complex case class structure, with a lot of fields. When I try to union two datasets of this class, it doesn't work with the following error : ds.union(ds1) Exception in thread "main" org.apache.spark.sql.AnalysisException: Union can only be performed on tables with the compatible column types
But when use it's rdd, the union goes right: ds.rdd.union(ds1.rdd) res8: org.apache.spark.rdd.RDD[ Is there any reason for this to happen (besides a bug ;) )
