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https://issues.apache.org/jira/browse/HIVE-10650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14540839#comment-14540839
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Aihua Xu commented on HIVE-10650:
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Initial patch.
> Improve sum() function over windowing to support additional range formats
> -------------------------------------------------------------------------
>
> Key: HIVE-10650
> URL: https://issues.apache.org/jira/browse/HIVE-10650
> Project: Hive
> Issue Type: Sub-task
> Components: PTF-Windowing
> Reporter: Aihua Xu
> Assignee: Aihua Xu
> Attachments: HIVE-10650.patch
>
>
> Support the following windowing function {{x preceding and y preceding}} and
> {{x following and y following}}.
> e.g.
> {noformat}
> select sum(value) over (partition by key order by value rows between 2
> preceding and 1 preceding) from tbl1;
> select sum(value) over (partition by key order by value rows between
> unbounded preceding and 1 preceding) from tbl1;
> {noformat}
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