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https://issues.apache.org/jira/browse/SPARK-23084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16327473#comment-16327473
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Huaxin Gao commented on SPARK-23084:
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Hi Sean, are you going to work on this? If not, may I work on it? Thanks!
> Add unboundedPreceding(), unboundedFollowing() and currentRow() to PySpark
> ---------------------------------------------------------------------------
>
> Key: SPARK-23084
> URL: https://issues.apache.org/jira/browse/SPARK-23084
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 2.3.0
> Reporter: Xiao Li
> Priority: Major
>
> Add the new APIs (introduced by https://github.com/apache/spark/pull/18814)
> to PySpark. Also update the rangeBetween API
> {noformat}
> /**
> * Window function: returns the special frame boundary that represents the
> first row in the
> * window partition.
> *
> * @group window_funcs
> * @since 2.3.0
> */
> def unboundedPreceding(): Column = Column(UnboundedPreceding)
> /**
> * Window function: returns the special frame boundary that represents the
> last row in the
> * window partition.
> *
> * @group window_funcs
> * @since 2.3.0
> */
> def unboundedFollowing(): Column = Column(UnboundedFollowing)
> /**
> * Window function: returns the special frame boundary that represents the
> current row in the
> * window partition.
> *
> * @group window_funcs
> * @since 2.3.0
> */
> def currentRow(): Column = Column(CurrentRow)
> {noformat}
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