Github user wzhfy commented on a diff in the pull request:
https://github.com/apache/spark/pull/19295#discussion_r140623965
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/ExperimentalMethods.scala ---
@@ -44,11 +44,14 @@ class ExperimentalMethods private[sql]() {
*/
@volatile var extraStrategies: Seq[Strategy] = Nil
+ @volatile var extraPreOptimizations: Seq[Rule[LogicalPlan]] = Nil
+
@volatile var extraOptimizations: Seq[Rule[LogicalPlan]] = Nil
--- End diff --
how about rename this `extraPostOptimizations`?
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