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Posted to dev@hive.apache.org by "Carl Steinbach (JIRA)" <ji...@apache.org> on 2010/07/26 08:22:54 UTC
[jira] Updated: (HIVE-947) Add run length encoding into RCFile's
block header
[ https://issues.apache.org/jira/browse/HIVE-947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Carl Steinbach updated HIVE-947:
--------------------------------
Fix Version/s: 0.5.0
Component/s: Serializers/Deserializers
> 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
> Components: Serializers/Deserializers
> Reporter: He Yongqiang
> Assignee: He Yongqiang
> Priority: Minor
> Fix For: 0.5.0
>
> 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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