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Posted to dev@hive.apache.org by "Carl Steinbach (JIRA)" <ji...@apache.org> on 2010/07/23 12:01:37 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 ]

Carl Steinbach updated HIVE-1348:
---------------------------------

    Fix Version/s: 0.6.0
      Component/s: Query Processor

> 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
>          Components: Query Processor
>            Reporter: Ning Zhang
>            Assignee: He Yongqiang
>             Fix For: 0.6.0
>
>         Attachments: hive-1348.1.patch, hive-1348.2.patch, hive-1348.3.patch, HIVE-1348.4.patch, HIVE-1348.5.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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