ulysses-you commented on code in PR #36468: URL: https://github.com/apache/spark/pull/36468#discussion_r868755471
########## sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/expressions.scala: ########## @@ -52,23 +53,46 @@ object ConstantFolding extends Rule[LogicalPlan] { case _ => false } - def apply(plan: LogicalPlan): LogicalPlan = plan.transformWithPruning(AlwaysProcess.fn, ruleId) { - case q: LogicalPlan => q.transformExpressionsDownWithPruning( - AlwaysProcess.fn, ruleId) { - // Skip redundant folding of literals. This rule is technically not necessary. Placing this - // here avoids running the next rule for Literal values, which would create a new Literal - // object and running eval unnecessarily. - case l: Literal => l - - case Size(c: CreateArray, _) if c.children.forall(hasNoSideEffect) => - Literal(c.children.length) - case Size(c: CreateMap, _) if c.children.forall(hasNoSideEffect) => - Literal(c.children.length / 2) - - // Fold expressions that are foldable. - case e if e.foldable => Literal.create(e.eval(EmptyRow), e.dataType) + /** + * The method is used to fold the children expression inside a conditional expression which + * is not foldable. Some branches may not be evaluated at runtime, so here we should in case of + * the exception and leave it to runtime + */ + private def conditionalExpressionFolding(child: Expression): Expression = { + if (child.foldable) { + try { + Literal.create(child.eval(EmptyRow), child.dataType) Review Comment: make sense, add a tag `FAILED_TO_EVALUATED` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org