[HIVE-947] Add run length encoding into RCFile's block header

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.5.0
• Component/s: Serializers/Deserializers
• Hadoop Flags: Reviewed
• Assignee: He Yongqiang
• Reporter: He Yongqiang
• Created: 22/Nov/09 08:32
• Updated: 17/Dec/11 00:05
• Resolved: 25/Nov/09 05:46

Description

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.