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https://issues.apache.org/jira/browse/SPARK-33126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-33126:
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Assignee: jiaan.geng
> Simplify offset window function(Remove direction field)
> -------------------------------------------------------
>
> Key: SPARK-33126
> URL: https://issues.apache.org/jira/browse/SPARK-33126
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: jiaan.geng
> Assignee: jiaan.geng
> Priority: Major
>
> The current Lead/Lag extends OffsetWindowFunction. OffsetWindowFunction
> contains field direction and use direction to calculate the boundary.
> We can use single literal expression unify the two properties.
> For example:
> 3 means direction is Asc and boundary is 3.
> -3 means direction is Desc and boundary is -3.
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