Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/20345#discussion_r163115407
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/JoinOptimizationSuite.scala
---
@@ -116,7 +124,12 @@ class JoinOptimizationSuite extends PlanTest {
)
queryAnswers foreach { queryAnswerPair =>
- val optimized = Optimize.execute(queryAnswerPair._1.analyze)
+ val optimized = Optimize.execute(queryAnswerPair._1.analyze) match {
+ // `ReorderJoin` adds `Project` to keep the same order of output
attributes.
--- End diff --
nit: `adds` -> `may add`
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