Github user icexelloss commented on a diff in the pull request:
https://github.com/apache/spark/pull/21650#discussion_r205859891
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/python/ExtractPythonUDFs.scala
---
@@ -94,36 +95,61 @@ object ExtractPythonUDFFromAggregate extends
Rule[LogicalPlan] {
*/
object ExtractPythonUDFs extends Rule[SparkPlan] with PredicateHelper {
- private def hasPythonUDF(e: Expression): Boolean = {
+ private case class EvalTypeHolder(private var evalType: Int = -1) {
--- End diff --
I see... You uses a var and nested function definition and var to remove
the need of a holder object.
IMHO I usually find nested function definition and function that refers to
variable outside its definition scope hard to read, but it could be my personal
preference.
Another thing I like about the current impl the is `EvalTypeHolder` class
ensures its value is ever changed once it's set so I think that's more robust.
That being said, I am ok with your suggestions too if you insist or
@BryanCutler also prefers it.
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