hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-12763) Use bit vector to track NDV
Date Wed, 27 Jan 2016 03:42:39 GMT

     [ https://issues.apache.org/jira/browse/HIVE-12763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gopal V updated HIVE-12763:
---------------------------
    Description: 
This will improve merging of per partitions stats. It will also help merge NDV for auto-gather
column stats.

!aggrStatsPerformance.png|thumbnail!

  was:This will improve merging of per partitions stats. It will also help merge NDV for auto-gather
column stats.


> Use bit vector to track NDV
> ---------------------------
>
>                 Key: HIVE-12763
>                 URL: https://issues.apache.org/jira/browse/HIVE-12763
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-12763.01.patch, HIVE-12763.02.patch, HIVE-12763.03.patch, HIVE-12763.04.patch,
HIVE-12763.05.patch, aggrStatsPerformance.png
>
>
> This will improve merging of per partitions stats. It will also help merge NDV for auto-gather
column stats.
> !aggrStatsPerformance.png|thumbnail!



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message