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https://issues.apache.org/jira/browse/HBASE-2038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221640#comment-13221640
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ramkrishna.s.vasudevan commented on HBASE-2038:
-----------------------------------------------

Also we need to have a provision to use the nbRows that is passed while 
scanning to be used in coprocessor such that the normal scanner.next() can be 
used in sync with the cached preScannerNext that we do with nbRows. 
                
> Coprocessors: Region level indexing
> -----------------------------------
>
>                 Key: HBASE-2038
>                 URL: https://issues.apache.org/jira/browse/HBASE-2038
>             Project: HBase
>          Issue Type: New Feature
>          Components: coprocessors
>            Reporter: Andrew Purtell
>            Priority: Minor
>
> HBASE-2037 is a good candidate to be done as coprocessor. It also serve as a 
> good goalpost for coprocessor environment design -- there should be enough of 
> it so region level indexing can be reimplemented as a coprocessor without any 
> loss of functionality. 

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