Github user jaceklaskowski commented on a diff in the pull request: https://github.com/apache/spark/pull/13392#discussion_r65008333 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala --- @@ -937,7 +937,8 @@ object SimplifyConditionals extends Rule[LogicalPlan] with PredicateHelper { */ case class OptimizeCodegen(conf: CatalystConf) extends Rule[LogicalPlan] { def apply(plan: LogicalPlan): LogicalPlan = plan transformAllExpressions { - case e @ CaseWhen(branches, _) if branches.size < conf.maxCaseBranchesForCodegen => + case e @ CaseWhen(branches, elseBranch) + if branches.size + elseBranch.size <= conf.maxCaseBranchesForCodegen => --- End diff -- Reading the case takes a while and and I think it'd greatly benefit from introducing a local `def` - a predicate - for the condition (I can't figure out a name for this, sorry)
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