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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-23665) Rewrite last_value to first_value to enable streaming results
Date Wed, 24 Jun 2020 17:13:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23665?focusedWorklogId=450541&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-450541
]

ASF GitHub Bot logged work on HIVE-23665:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 24/Jun/20 17:12
            Start Date: 24/Jun/20 17:12
    Worklog Time Spent: 10m 
      Work Description: ramesh0201 closed pull request #1114:
URL: https://github.com/apache/hive/pull/1114


   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 450541)
    Time Spent: 20m  (was: 10m)

> Rewrite last_value to first_value to enable streaming results
> -------------------------------------------------------------
>
>                 Key: HIVE-23665
>                 URL: https://issues.apache.org/jira/browse/HIVE-23665
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Ramesh Kumar Thangarajan
>            Assignee: Ramesh Kumar Thangarajan
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-23665.1.patch, HIVE-23665.2.patch, HIVE-23665.3.patch
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Rewrite last_value to first_value to enable streaming results
> last_value cannot be streamed because the intermediate results need to be buffered to
determine the window result till we get the last row in the window. But if we can rewrite
to first_value we can stream the results, although the order of results will not be guaranteed
(also not important)



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