Github user yhuai commented on a diff in the pull request: https://github.com/apache/spark/pull/2241#discussion_r18430235 --- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/TestHive.scala --- @@ -369,6 +371,7 @@ class TestHiveContext(sc: SparkContext) extends HiveContext(sc) { * tests. */ protected val originalUdfs: JavaSet[String] = FunctionRegistry.getFunctionNames + HiveShim.createDefaultDBIfNeeded(this) --- End diff -- Can you add a comment at here to explain why it is necessary?
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