Github user gvramana commented on a diff in the pull request:
https://github.com/apache/spark/pull/2802#discussion_r21086151
--- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUdfs.scala
---
@@ -172,6 +177,8 @@ private[hive] case class
HiveGenericUdf(functionClassName: String, children: Seq
override def eval(input: Row): Any = {
returnInspector // Make sure initialized.
+ if(foldable) return constantReturnValue
--- End diff --
In HiveQuerySuite, "constant array" testcase was failing
SELECT sort_array(
sort_array(
array("hadoop distributed file system",
"enterprise databases", "hadoop map-reduce")))
FROM src LIMIT 1
[info] - constant array *** FAILED *** (596 milliseconds)
[info] Failed to execute query using catalyst:
[info] Error: java.lang.String cannot be cast to org.apache.hadoop.io.Text
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