Github user jaceklaskowski commented on a diff in the pull request:
https://github.com/apache/spark/pull/14435#discussion_r73334011
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
---
@@ -692,11 +864,17 @@ case class LocalLimit(limitExpr: Expression, child:
LogicalPlan) extends UnaryNo
}
child.statistics.copy(sizeInBytes = sizeInBytes)
}
+
+ override def sql: String = child.sql
}
case class SubqueryAlias(alias: String, child: LogicalPlan) extends
UnaryNode {
override def output: Seq[Attribute] =
child.output.map(_.withQualifier(Some(alias)))
+
+ override def sql: String = child match {
+ case _ => if (child.sql.equals(alias)) child.sql else s"(${child.sql})
AS $alias"
--- End diff --
Why do you pattern match here?
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