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Posted to notifications@accumulo.apache.org by "Josh Elser (JIRA)" <ji...@apache.org> on 2014/01/11 04:03:50 UTC

[jira] [Commented] (ACCUMULO-2177) A scan time iterator to return the first N entries encountered for each row in the input range. (FirstNEntriesInRowIterator)

    [ https://issues.apache.org/jira/browse/ACCUMULO-2177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13868630#comment-13868630 ] 

Josh Elser commented on ACCUMULO-2177:
--------------------------------------

FirstEntryInRowIterator would be a nice starting point here -- would be easy to (re)implement a FirstEntryInRowIterator given a FirstNEntriesInRowIterator.

> 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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