[GitHub] [spark] cloud-fan commented on a change in pull request #29886: [SPARK-27951][SQL][FOLLOWUP] Improve the window function nth_value

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cloud-fan commented on a change in pull request #29886:
URL: https://github.com/apache/spark/pull/29886#discussion_r495701315



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File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/windowExpressions.scala
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@@ -669,7 +669,9 @@ case class NthValue(input: Expression, offsetExpr: Expression, ignoreNulls: Bool
 

Review comment:
       Unfortunately there is no SQL API for it yet. It's only available in DataFrame API. We will add examples when we add the SQL API.




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