Github user caneGuy commented on a diff in the pull request:
https://github.com/apache/spark/pull/21552#discussion_r201970972
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveSessionCatalog.scala ---
@@ -131,6 +132,8 @@ private[sql] class HiveSessionCatalog(
Try(super.lookupFunction(funcName, children)) match {
case Success(expr) => expr
case Failure(error) =>
+ logWarning(s"Encounter a failure during looking up function:" +
+ s" ${Utils.exceptionString(error)}")
if (functionRegistry.functionExists(funcName)) {
--- End diff --
I have update that set up the root cause for `NoSuchFunctionException`.
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