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Posted to issues@hive.apache.org by "Pengcheng Xiong (JIRA)" <ji...@apache.org> on 2016/01/19 07:26:39 UTC

[jira] [Updated] (HIVE-12763) Use bit vector to track NDV

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

Pengcheng Xiong updated HIVE-12763:
-----------------------------------
    Description: This will improve merging of per partitions stats. It will also help merge NDV for auto-gather column stats.  (was: This will improve merging of per partitions 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
>
>
> This will improve merging of per partitions stats. It will also help merge NDV for auto-gather column stats.



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