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https://issues.apache.org/jira/browse/HIVE-819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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He Yongqiang updated HIVE-819:
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Attachment: hive-819-2009-11-1.patch
update the patch to the trunk code (overwrite the .q.out file).
> Add lazy decompress ability to RCFile
> -------------------------------------
>
> Key: HIVE-819
> URL: https://issues.apache.org/jira/browse/HIVE-819
> Project: Hadoop Hive
> Issue Type: Improvement
> Components: Query Processor, Serializers/Deserializers
> Reporter: He Yongqiang
> Assignee: He Yongqiang
> Fix For: 0.5.0
>
> Attachments: hive-819-2009-11-1.patch, hive-819-2009-9-12.patch,
> hive-819-2009-9-21.patch
>
>
> This is especially useful for a filter scanning.
> For example, for query 'select a, b, c from table_rc_lazydecompress where
> a>1;' we only need to decompress the block data of b,c columns when one row's
> column 'a' in that block satisfies the filter condition.
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