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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-450) Remove the need for users to specify the types of the inputs
Date Tue, 15 Aug 2006 20:21:14 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-450?page=all ]

Doug Cutting updated HADOOP-450:
--------------------------------

        Status: Resolved  (was: Patch Available)
    Resolution: Fixed

I just committed this, with a warning about the incompatible nature of the changes.

Thanks, Owen!

> Remove the need for users to specify the types of the inputs
> ------------------------------------------------------------
>
>                 Key: HADOOP-450
>                 URL: http://issues.apache.org/jira/browse/HADOOP-450
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.5.0
>            Reporter: Owen O'Malley
>         Assigned To: Owen O'Malley
>             Fix For: 0.6.0
>
>         Attachments: no-input-type.patch
>
>
> Currently, the application specifies the types of the input keys and values and the RecordReader
checks them for consistency. It would make more sense to have the RecordReader define the
types of keys that it will produce. Therefore, I propose that we add two new methods to RecordReader:
> WritableComparable createKey();
> Writable createValue();
> Note that I propose adding them to the RecordReader rather than the InputFormat, so that
they can specific to a particular input split.

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