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Posted to dev@lucene.apache.org by "Uwe Schindler (JIRA)" <ji...@apache.org> on 2010/10/01 22:23:32 UTC
[jira] Commented: (LUCENE-2671) Add sort missing first/last ability
to SortField and ValueComparator
[ https://issues.apache.org/jira/browse/LUCENE-2671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12917023#action_12917023 ]
Uwe Schindler commented on LUCENE-2671:
---------------------------------------
Additionally, the source code formatting is not Lucene-conform (should be no newline before {, no extra space around method parameters).
> 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
> Fix For: 4.0
>
> 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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