Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/2542#discussion_r18123585
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
---
@@ -110,9 +110,18 @@ 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
+ if (remainingParts.length == 1) {
+ // for simple data type
+ (option.withName(remainingParts.head), Nil) :: Nil
+ } else if (option.dataType.isInstanceOf[StructType]) {
+ // for complex data type
+ (option.withName(remainingParts.head),
remainingParts.tail.toList) :: Nil
+ } else {
+ // for simple data type but multiple parts remaining
+ Nil
+ }
--- End diff --
Maybe this?
```scala
(option.dataType, remainingParts) match {
// No nesting
case (_, _ :: Nil) => (option, Nil) :: Nil
// Points to nested field(s) of a structure
case (_: StructType, _ :: tail) => (option, tail) :: Nil
// Invalid
case _ => Nil
}
```
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