Github user tianyi commented on a diff in the pull request:
https://github.com/apache/spark/pull/2542#discussion_r18191704
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
---
@@ -110,8 +110,20 @@ abstract class LogicalPlan extends
QueryPlan[LogicalPlan] with Logging {
}
if (resolver(option.name, remainingParts.head)) {
- // Preserve the case of the user's attribute reference.
- (option.withName(remainingParts.head), remainingParts.tail.toList)
:: Nil
+ (option.dataType, remainingParts) match {
+ // No nesting
+ case (_, _ :: Nil) => (option.withName(remainingParts.head),
Nil) :: Nil
+ // Points to nested field(s) of a structure
+ case (_: StructType, _ :: tail) => {
+ try {
+ (resolveNesting(tail, option, resolver), tail.last) :: Nil
+ } catch {
+ case _: Throwable => Nil
--- End diff --
@marmbrus , in the resolveNesting function, RuntimeException will be thrown
if the nested references not exists in structType.
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