Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/14284#discussion_r71488537
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/windowExpressions.scala
---
@@ -382,7 +382,7 @@ abstract class OffsetWindowFunction
*
* @param input expression to evaluate 'offset' rows after the current row.
* @param offset rows to jump ahead in the partition.
- * @param default to use when the input value is null or when the offset
is larger than the window.
+ * @param default to use when the offset is larger than the window.
--- End diff --
@hvanhovell what was the reason that we changed the behavior of lead and
lag on if they respect null values?
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