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Posted to dev@lucene.apache.org by "Yonik Seeley (JIRA)" <ji...@apache.org> on 2010/12/08 18:28:01 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=12969386#action_12969386 ]
Yonik Seeley commented on LUCENE-2671:
--------------------------------------
(carried over from LUCENE-2649... I guess my last patch should have been here.)
Actually, looking a bit further at these comparators, it seems like we have an unnecessary cast in the inner-loop method compareBottom (because of type erasure)?
Seems like we should just cache the int[] or whatever to avoid that.
I'll work up another patch for consideration.
> 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-caches.patch, LUCENE-2671-caches.patch, LUCENE-2671-SortMissingLast.patch, LUCENE-2671-suppress-unchecked.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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