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https://issues.apache.org/jira/browse/HBASE-4587?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-4587.
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Resolution: Duplicate
Implemented elsewhere. See MultiTableInputFormat and MultiTableOutputFormat.
> HBase MR support for multiple tables as input
> ---------------------------------------------
>
> Key: HBASE-4587
> URL: https://issues.apache.org/jira/browse/HBASE-4587
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Affects Versions: 0.90.3
> Reporter: Rajeev Rao
>
> Some requirements:
> - Being able to have multiple tables as your input path
> - Being able to filter on specific columns/column families
> - Providing the source location (table/row/column) to the results
> - Multiple clusters
> - Different schemas.
> Overall this seems difficult for now so I am going to punt on it. On the
> other hand it would be easy enough to write all of the MR values into an
> intermediate table and then work from there.
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