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https://issues.apache.org/jira/browse/ACCUMULO-391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13784932#comment-13784932
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William Slacum commented on ACCUMULO-391:
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>From a high level perspective (aka "I haven't read the changeset yet"), the
>single table case should be implemented as a specific case of the multitable
>paradigm. If we can support the old interface, that's great, but it should be
>deprecated so that we're not bound to it.
> 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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