Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5162#discussion_r27067355
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
---
@@ -33,7 +33,7 @@ class CheckAnalysis {
*/
val extendedCheckRules: Seq[LogicalPlan => Unit] = Nil
- def failAnalysis(msg: String) = {
+ def failAnalysis(msg: String): Nothing = {
--- End diff --
Unit won't actually compile because we use this as the last statement in
transformExpressionUp and the compiler expects this function to return
something.
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