Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/758#discussion_r12598965
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveOperators.scala ---
@@ -102,16 +105,55 @@ case class HiveTableScan(
.getOrElse(sys.error(s"Can't find attribute $a"))
(row: Any, _: Array[String]) => {
val data = objectInspector.getStructFieldData(row, ref)
- unwrapData(data, ref.getFieldObjectInspector)
+ unwrapHiveData(unwrapData(data, ref.getFieldObjectInspector))
}
}
}
}
+ private def unwrapHiveData(value: Any) = value match {
+ case maybeNull: String if maybeNull.toLowerCase == "null" => null
--- End diff --
Would it be possible to calculate the required unwrapping statically based
on the object inspector instead of doing this match for every data item?
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