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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-2126) Hive's symlink text input format should be able to work with ComineHiveInputFormat
Date Fri, 22 Apr 2011 19:07:05 GMT
Hive's symlink text input format should be able to work with ComineHiveInputFormat
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                 Key: HIVE-2126
                 URL: https://issues.apache.org/jira/browse/HIVE-2126
             Project: Hive
          Issue Type: Improvement
            Reporter: He Yongqiang
            Assignee: He Yongqiang


at compile time, if a partition's file format is SymlinkTextInputFormat, will replace the
symlink path with paths in the symlink file. This way, it will work with Hive's HiveCombineFileInputFormat.

The reason we are doing it at compile time is because:
1) At run time, the input path is not only used to get record reader, but also used for hive
to get aliases and thus operator tree. But the CombineHiveInputFormat can have multiple paths
for each split, and when switching paths, it also set the job with new input file name. So
it always require a real input path name. Can not fake it.
2) if write a new input format, it will require a lot of duplication work with existing CombineHiveInputFormat.


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