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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4316) Deprecate Fields.getUniqueTermCount, remove AtomicReader.getUniqueTermCount
Date Tue, 21 Aug 2012 06:22:38 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13438478#comment-13438478
] 

Uwe Schindler commented on LUCENE-4316:
---------------------------------------

+1
                
> Deprecate Fields.getUniqueTermCount, remove AtomicReader.getUniqueTermCount
> ---------------------------------------------------------------------------
>
>                 Key: LUCENE-4316
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4316
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Robert Muir
>         Attachments: LUCENE-4316.patch
>
>
> Spinoff from LUCENE-4315.
> This was my comment there:
> {noformat}
> we should consider Fields.getUniqueTermCount,
> which has a default implementation that sums across fields (preflex overrides).
> This was necessary to have some way to access the segment-level unique term count for
3.x indexes,
> which do not actually know this information per-field and override this method to provide
it.
> But there is no need to have this on AtomicReader (I think its way too expert, just get
the Fields
> and get it from there), and we can consider deprecating this in 4.x and removing it in
trunk
> alltogether as then someone can just use the field-level statistics.
> {noformat}

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