Github user heary-cao commented on a diff in the pull request:
https://github.com/apache/spark/pull/21139#discussion_r183929216
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -618,6 +619,18 @@ object CollapseRepartition extends Rule[LogicalPlan] {
}
}
+/**
+ * Exchanged the adjacent logical window operator according to the order
field of window.
+ */
+object ExchangeWindowWithOrderField extends Rule[LogicalPlan] {
+ def apply(plan: LogicalPlan): LogicalPlan = plan transformUp {
+ case w1 @ Window(_, _, orderSpec1, w2 @ Window(_, _, orderSpec2,
child2))
+ if orderSpec1.size > orderSpec2.size =>
--- End diff --
@hvanhovell , Sorry, I fix it. thanks.
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