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https://issues.apache.org/jira/browse/LUCENE-3191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13047440#comment-13047440
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Michael McCandless commented on LUCENE-3191:
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Uwe, you are right! Now why didn't I think of that...
The returned Comparable should be expected to properly compare itself to any
other Comparable returned from FieldComparator.value... so I'll do that and
then the patch is nice and small. And no API change for 3.x.
> Add TopDocs.merge to merge multiple TopDocs
> -------------------------------------------
>
> Key: LUCENE-3191
> URL: https://issues.apache.org/jira/browse/LUCENE-3191
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 3.3, 4.0
>
> Attachments: LUCENE-3191.patch
>
>
> It's not easy today to merge TopDocs, eg produced by multiple shards,
> supporting arbitrary Sort.
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