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Posted to dev@hive.apache.org by "He Yongqiang (JIRA)" <ji...@apache.org> on 2010/05/19 03:08:53 UTC

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

     [ https://issues.apache.org/jira/browse/HIVE-1348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

He Yongqiang updated HIVE-1348:
-------------------------------

    Attachment: hive-1348.1.patch

Patch for review.

> Moving inputFileChanged() from ExecMapper to where it is needed
> ---------------------------------------------------------------
>
>                 Key: HIVE-1348
>                 URL: https://issues.apache.org/jira/browse/HIVE-1348
>             Project: Hadoop Hive
>          Issue Type: Improvement
>            Reporter: Ning Zhang
>            Assignee: He Yongqiang
>         Attachments: hive-1348.1.patch
>
>
> 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. 

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