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https://issues.apache.org/jira/browse/HIVE-10650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14557289#comment-14557289
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Lefty Leverenz commented on HIVE-10650:
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Doc note: This needs to be documented in the wiki for the 1.3.0 release.
* [Windowing and Analytics -- WINDOW clause |
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+WindowingAndAnalytics#LanguageManualWindowingAndAnalytics-WINDOWclause]
> 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
> Labels: TODOC1.3
> Fix For: 1.3.0
>
> 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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