Github user marmbrus commented on a diff in the pull request: https://github.com/apache/spark/pull/9810#discussion_r45236758 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala --- @@ -61,7 +62,31 @@ object ProductEncoder { def extractorFor( inputObject: Expression, - tpe: `Type`): Expression = ScalaReflectionLock.synchronized { + tpe: `Type`): Expression = + extractorFor(inputObject, tpe, s"""- root object (class: "$tpe")""" :: Nil) + + def extractorFor( + inputObject: Expression, + tpe: `Type`, + walkedObjectPath: Seq[String]): Expression = ScalaReflectionLock.synchronized { --- End diff -- Document the format of `walkedObjectPath` in the doc.
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