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Date: Sun, 26 Sep 2010 18:13:40 -0400 (EDT)
From: "Ryan McKinley (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Updated: (LUCENE-2671) Add sort missing first/last ability
 to SortField and ValueComparator
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     [ https://issues.apache.org/jira/browse/LUCENE-2671?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ryan McKinley updated LUCENE-2671:
----------------------------------

    Attachment: LUCENE-2671-SortMissingLast.patch

This is the lucene only parts of SOLR-2134

> Add sort missing first/last ability to SortField and ValueComparator
> --------------------------------------------------------------------
>
>                 Key: LUCENE-2671
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2671
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Search
>            Reporter: Ryan McKinley
>            Assignee: Ryan McKinley
>         Attachments: LUCENE-2671-SortMissingLast.patch
>
>
> When SortField and ValueComparator use EntryCreators (from LUCENE-2649) they use a special sort value when the field is missing.
> This enables lucene to implement 'sort missing last' or 'sort missing first' for numeric values from the FieldCache.

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