Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/15847#discussion_r87519874
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
---
@@ -36,7 +36,7 @@ import org.apache.spark.unsafe.types.UTF8String
* @param name The short name of the function
*/
abstract class LeafMathExpression(c: Double, name: String)
- extends LeafExpression with CodegenFallback {
+ extends LeafExpression with CodegenFallback with Serializable {
--- End diff --
does this actually matter? all expressions should be case classes, which
means they are serializable.
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