Github user bogdanrdc commented on a diff in the pull request:
https://github.com/apache/spark/pull/16608#discussion_r96298581
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
---
@@ -204,6 +204,17 @@ case class Stack(children: Seq[Expression]) extends
Generator {
}
}
+case class GeneratorOuter(child: Generator) extends UnaryExpression
+ with Generator {
--- End diff --
Couldn't make it work with Unevaluable because Generator.eval is not the
same as Unevaluable.eval.
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