[jira] Commented: (HIVE-947) Add run length encoding into RCFile's block header

["Namit Jain (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781310#action_12781310 ] 

Namit Jain commented on HIVE-947:
---------------------------------

Since I am not very familiar with this, let us go over it together sometime 

> 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.

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