Hey there, Interested in writing a UDF that returns an ArrayType column of unknown subtype. My understanding is that this translated JVM-type-wise be a Seq of generic templated type: Seq[Any]. I seem to be hitting the constraint at https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala:657 that basically necessitates a fully qualified schema on the return type (i.e. the templated Any is hitting the default exception throwing case at the end of schemaFor).
Is there any more canonical way have a UDF produce an ArrayType column of unknown type? Or is my only alternative here to reduce this to BinaryType and use whatever encoding/data structures I want under the covers there and in subsequent UDFs? Thanks, Chris
