Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/19811#discussion_r157409537
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
---
@@ -217,7 +217,7 @@ case class Stack(children: Seq[Expression]) extends
Generator {
ctx.addMutableState(
s"$wrapperClass<InternalRow>",
ev.value,
- s"${ev.value} = $wrapperClass$$.MODULE$$.make($rowData);")
--- End diff --
I will do it in another PR.
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