cloud-fan commented on a change in pull request #30570:
URL: https://github.com/apache/spark/pull/30570#discussion_r534104632
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/expressions.scala
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@@ -42,10 +42,10 @@ import org.apache.spark.sql.types._
*/
object ConstantFolding extends Rule[LogicalPlan] {
- private def hasNoSideEffect(e: Expression): Boolean = e match {
+ private def cannotThrowException(e: Expression): Boolean = e match {
case _: Attribute => true
case _: Literal => true
- case _: NoSideEffect => e.children.forall(hasNoSideEffect)
+ case _: NoThrow => e.children.forall(cannotThrowException)
Review comment:
Since the naming is clear now, I'd suggest we add `if e.determinisitc`
here, since `NoThrow` doesn't indicate that it's deterministic.
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