Github user JoshRosen commented on a diff in the pull request: https://github.com/apache/spark/pull/8354#discussion_r42454432 --- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveShim.scala --- @@ -196,14 +194,8 @@ private[hive] object HiveShim { if (instance != null) { instance.asInstanceOf[UDFType] } else { - val func = Utils.getContextOrSparkClassLoader + Utils.getContextOrSparkClassLoader .loadClass(functionClassName).newInstance.asInstanceOf[UDFType] - if (!func.isInstanceOf[UDF]) { --- End diff -- Doing a bit more research: It looks like #3640 added this driver-side creation and serialization of the UDF not as a performance optimization but as a correctness issue. Given this, will this PR break the correctness for those UDFs?
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