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https://issues.apache.org/jira/browse/HBASE-4223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13440562#comment-13440562
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Lars Hofhansl commented on HBASE-4223:
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This is specific to the AggregationClient, right?
Coprocessor can already intercept Scan request and return custom results (that
is how we aggregate at Salesforce)
> Support the ability to return a set of rows using Coprocessors
> --------------------------------------------------------------
>
> Key: HBASE-4223
> URL: https://issues.apache.org/jira/browse/HBASE-4223
> Project: HBase
> Issue Type: Improvement
> Components: coprocessors
> Affects Versions: 0.92.0
> Reporter: Nichole Treadway
> Priority: Minor
> Attachments: HBASE-4223.patch
>
>
> Currently HBase supports returning the results of aggregation operations
> using coprocessors with the AggregationClient. It would be useful to include
> a client and implementation which would return a set of rows which match a
> certain criteria using coprocessors as well. We have a use case in our
> business process for this.
> We have an initial implementation of this, which I've attached. The only
> limitation that we've found is that it cannot be used to return very large
> sets of rows. If the result set is very large, it would probably require some
> sort of pagination.
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