Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/5014#discussion_r28200359
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
---
@@ -137,12 +137,13 @@ case class InsertIntoTable(
}
}
-case class CreateTableAsSelect[T](
- databaseName: Option[String],
- tableName: String,
- child: LogicalPlan,
- allowExisting: Boolean,
- desc: Option[T] = None) extends UnaryNode {
+trait CreateTableAsSelect extends UnaryNode {
+ self: Product =>
+ def databaseName: Option[String]
+ def tableName: String
+ def child: LogicalPlan
+ def allowExisting: Boolean
+
--- End diff --
I guess we cannot use `Command` because a `Command` is a `LeafNode`. If we
make it a `Command`, the child logical plan will not be analyzed and optimized.
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