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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2022/12/08 11:03:21 UTC
[GitHub] [spark] MrDLontheway commented on a diff in pull request #38893: [Spark-40099][SQL] Merge adjacent CaseWhen branches if their values are the same
MrDLontheway commented on code in PR #38893:
URL: https://github.com/apache/spark/pull/38893#discussion_r1043227501
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
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@@ -639,6 +639,26 @@ object RemoveNoopOperators extends Rule[LogicalPlan] {
}
}
+/**
+ * Merge case condition expression with same value.
+ */
+object MergeConditionWithValue extends Rule[LogicalPlan] {
Review Comment:
this is 2000 branches run time
<img width="1260" alt="image" src="https://user-images.githubusercontent.com/29403543/206430556-08ffe134-2d3e-48ab-bdb1-d941957869e1.png">
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