Github user marmbrus commented on a diff in the pull request: https://github.com/apache/spark/pull/10174#discussion_r48183908 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/rules/RuleExecutor.scala --- @@ -59,7 +59,7 @@ abstract class RuleExecutor[TreeType <: TreeNode[_]] extends Logging { protected case class Batch(name: String, strategy: Strategy, rules: Rule[TreeType]*) /** Defines a sequence of rule batches, to be overridden by the implementation. */ - protected val batches: Seq[Batch] + protected def batches: Seq[Batch] --- End diff -- I don't think thats true. You can't call `super` on a val.
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