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https://issues.apache.org/jira/browse/ACCUMULO-391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13775931#comment-13775931
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Keith Turner commented on ACCUMULO-391:
---------------------------------------

While looking at the patch I thought of ACCUMULO-1732.  For some reason this 
change made that issue really apparent to me.
                
> Multi-table Accumulo input format
> ---------------------------------
>
>                 Key: ACCUMULO-391
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-391
>             Project: Accumulo
>          Issue Type: New Feature
>            Reporter: John Vines
>            Assignee: Corey J. Nolet
>            Priority: Minor
>              Labels: mapreduce,
>             Fix For: 1.6.0
>
>         Attachments: ACCUMULO-391.patch, multi-table-if.patch, 
> new-multitable-if.patch
>
>
> Just realized we had no MR input method which supports multiple Tables for an 
> input format. I would see it making the table the mapper's key and making the 
> Key/Value a tuple, or alternatively have the Table/Key be the key tuple and 
> stick with Values being the value.

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