[jira] [Commented] (HIVE-20768) Adding Tumbling Window UDF

["slim bouguerra (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-20768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16654410#comment-16654410 ] 

slim bouguerra commented on HIVE-20768:
---------------------------------------

[~t3rmin4t0r]/[~ashutoshc]/

can you please take a look.

 

> Adding Tumbling Window UDF
> --------------------------
>
>                 Key: HIVE-20768
>                 URL: https://issues.apache.org/jira/browse/HIVE-20768
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: slim bouguerra
>            Assignee: slim bouguerra
>            Priority: Major
>
> Goal is to provide a UDF that truncates a timestamp to a beginning of a tumbling window interval.
> {code}
> /**
>  * Tumbling windows are a series of fixed-sized, non-overlapping and contiguous time intervals.
>  * Tumbling windows are inclusive start exclusive end.
>  * By default the beginning instant of fist window is Epoch 0 Thu Jan 01 00:00:00 1970 UTC.
>  * Optionally users may provide a different origin as a timestamp arg3.
>  *
>  * This an example of series of window with an interval of 5 seconds and origin Epoch 0 Thu Jan 01 00:00:00 1970 UTC:
>  *
>  *
>  *   interval 1           interval 2            interval 3
>  *   Jan 01 00:00:00      Jan 01 00:00:05       Jan 01 00:00:10
>  * 0 -------------- 4 : 5 --------------- 9: 10 --------------- 14
>  *
>  * This UDF rounds timestamp agr1 to the beginning of window interval where it belongs to.
>  *
>  */
> {code}



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