Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/15780#discussion_r90309905
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
---
@@ -171,15 +171,17 @@ case class StaticInvoke(
* @param arguments An optional list of expressions, whos evaluation will
be passed to the function.
* @param propagateNull When true, and any of the arguments is null, null
will be returned instead
* of calling the function.
+ * @param returnNullable When false, return value must be non-null.
--- End diff --
thanks, done
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