[HIVE-1348] Moving inputFileChanged() from ExecMapper to where it is needed

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.6.0
• Component/s: Query Processor
• Hadoop Flags: Reviewed
• Assignee: He Yongqiang
• Reporter: Ning Zhang
• Created: 18/May/10 17:49
• Updated: 17/Dec/11 00:03
• Resolved: 03/Jun/10 23:15

Description

inputFileChanged() is only needed for Bucketed sort merge map join. It should not be put in ExecMapper.map() where all code paths will hit this function. This function is quite expensive since JobConf look up is a hash table look up.