[jira] [Issue Comment Deleted] (SPARK-34096) Improve performance for nth_value ignore nulls over offset window

["jiaan.geng (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-34096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

jiaan.geng updated SPARK-34096:
-------------------------------
    Comment: was deleted

(was: I'm working on.)

> 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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