Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/10295#discussion_r47579669
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
---
@@ -85,10 +88,20 @@ case class Generate(
if (join) child.output ++ qualified else qualified
}
+
+ override protected def otherJsonValues: JValue = {
+ ("generator-type" -> generator.getClass.getSimpleName) ~
+ ("join" -> join) ~
+ ("outer" -> outer) ~
+ ("qualifier" -> qualifier) ~
+ ("generator-output" -> generatorOutput.map(_.simpleString))
--- End diff --
Since expressions are trees too, it would be nice if we could serialize
them also. We are loosing lots of information about types by saving the
`simpleString` only.
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