hadoop-hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-947) Add run length encoding into RCFile's block header
Date Sun, 22 Nov 2009 08:56:40 GMT

     [ https://issues.apache.org/jira/browse/HIVE-947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

He Yongqiang updated HIVE-947:

    Attachment: hive-947-2009-11-22.patch

hive-947-2009-11-22.patch implemented the run length encoding. This is only a minor improvement,
so no test added.

> Add run length encoding into RCFile's block header 
> ---------------------------------------------------
>                 Key: HIVE-947
>                 URL: https://issues.apache.org/jira/browse/HIVE-947
>             Project: Hadoop Hive
>          Issue Type: Improvement
>            Reporter: He Yongqiang
>            Assignee: He Yongqiang
>            Priority: Minor
>         Attachments: hive-947-2009-11-22.patch
> When RCFile constructing rows, it needs to get column value's length via calling readVLong().
And this should be avoided for fix length or most fix length columns. 
> This also should not influence old rcfile files, which means it should also work correctly
on files with previous RCFile format.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message