Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/4249#discussion_r24126304
--- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala ---
@@ -55,13 +55,11 @@ private[hive] case object NativePlaceholder extends
Command
*/
case class DescribeCommand(
table: LogicalPlan,
- isExtended: Boolean) extends Command {
- override def output = Seq(
- // Column names are based on Hive.
- AttributeReference("col_name", StringType, nullable = false)(),
- AttributeReference("data_type", StringType, nullable = false)(),
- AttributeReference("comment", StringType, nullable = false)())
-}
+ override val output: Seq[Attribute] =
+ Seq(AttributeReference("col_name", StringType, nullable = false)(),
+ AttributeReference("data_type", StringType, nullable = false)(),
+ AttributeReference("comment", StringType, nullable = false)()),
+ isExtended: Boolean) extends Command
--- End diff --
Hmm, i guess that is okay for leaf nodes since they will never be copied...
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