Github user DoingDone9 commented on a diff in the pull request: https://github.com/apache/spark/pull/5538#discussion_r28840547 --- Diff: sql/hive/v0.12.0/src/main/scala/org/apache/spark/sql/hive/Shim12.scala --- @@ -135,7 +135,13 @@ private[hive] object HiveShim { PrimitiveCategory.VOID, null) def getStringWritable(value: Any): hadoopIo.Text = - if (value == null) null else new hadoopIo.Text(value.asInstanceOf[UTF8String].toString) + if (value == null) { + null + } else if (value.isInstanceOf[String]) { + new hadoopIo.Text(value.asInstanceOf[String]) + } else { + new hadoopIo.Text(value.asInstanceOf[UTF8String].toString) + } --- End diff -- if want to return the Literal(database, StringType) in HiveFunctionRegistry.lookupFunctio, i need add a judge for current_databse. And this alse seems a hack way. any idea? @chenghao-intel
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