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From "Corey Nolet (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2177) A scan time iterator to return the first N entries encountered for each row in the input range. (FirstNEntriesInRowIterator)
Date Sat, 11 Jan 2014 03:37:51 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13868640#comment-13868640
] 

Corey Nolet commented on ACCUMULO-2177:
---------------------------------------

Agreed. I actually got this working today. I began with the
FirstEntryInRowIterator and combined some of the batching from the
WholeRowIterator ( providing methods for encoding/decoding the batched rows
into the value).





> A scan time iterator to return the first N entries encountered for each row in the input
range. (FirstNEntriesInRowIterator)
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-2177
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2177
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: client
>            Reporter: Corey J. Nolet
>            Priority: Minor
>              Labels: iterators
>
> I have found this iterator extremely useful when it is important to run a batch scan
over a bunch of different ranges but guarantee that a predefined number of results get returned
for each row.



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