Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/4904#discussion_r25972701
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
---
@@ -152,6 +153,18 @@ case class Sort(
global: Boolean,
child: LogicalPlan) extends UnaryNode {
override def output = child.output
+
+ override def resolveChildren(name: String, resolver: Resolver) = {
--- End diff --
This feels kind of hacky to me as its mixing the particulars of analysis
for SQL into the logical plan. Could we instead just make resolve not do
partial resolution, where we can resolve the base attribute but not the
GetFields that are on top. I think this change is the root cause of the
regression.
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