Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/10731#discussion_r56610085
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
---
@@ -202,3 +203,14 @@ object Unions {
}
}
}
+
+/**
+ * Extractor for retrieving Int value.
+ */
+object IntegerIndex {
+ def unapply(a: Any): Option[Int] = a match {
+ case Literal(a: Int, IntegerType) => Some(a)
+ case UnaryMinus(IntegerLiteral(v)) => Some(-v)
--- End diff --
This line is used for catching the illegal case:
```scala
sql("SELECT * FROM testData2 ORDER BY -1 DESC, b ASC").collect()
```
I plan to keep it untouched in the PR. Thanks!
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