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https://issues.apache.org/jira/browse/SPARK-34096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-34096.
---------------------------------
Fix Version/s: 3.2.0
Resolution: Fixed
Issue resolved by pull request 31178
[https://github.com/apache/spark/pull/31178]
> Improve performance for nth_value ignore nulls over offset window
> -----------------------------------------------------------------
>
> Key: SPARK-34096
> URL: https://issues.apache.org/jira/browse/SPARK-34096
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: jiaan.geng
> Assignee: jiaan.geng
> Priority: Major
> Fix For: 3.2.0
>
>
> The current
> {code:java}
> UnboundedOffsetWindowFunctionFrame
> {code}
> and
> {code:java}
> UnboundedPrecedingOffsetWindowFunctionFrame
> {code}
> only support nth_value that respect nulls. So nth_value will execute
> {code:java}
> updateExpressions
> {code}
> multiple times.
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