Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/14033#discussion_r69650449
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
---
@@ -94,6 +94,59 @@ case class UserDefinedGenerator(
}
/**
+ * Separate v1, ..., vk into n rows. Each row will have k/n columns. n
must be constant.
+ * {{{
+ * SELECT stack(2, 1, 2, 3)) ->
--- End diff --
Oops. Thank you, @tejasapatil !
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