cloud-fan commented on a change in pull request #29798:
URL: https://github.com/apache/spark/pull/29798#discussion_r492649622
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
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@@ -318,7 +321,6 @@ trait Unevaluable extends Expression {
*/
trait RuntimeReplaceable extends UnaryExpression with Unevaluable {
override def nullable: Boolean = child.nullable
- override def foldable: Boolean = child.foldable
Review comment:
Ah `TaggingExpression` sounds like a good idea, we can try it later.
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