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Nov 20, 2009, 7:05 PM
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[jira] Commented: (LUCENE-517) norm compression breaks ranking for small fields
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[ https://issues.apache.org/jira/browse/LUCENE-517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12780901#action_12780901 ]
Lance Norskog commented on LUCENE-517:
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[LUCENE-1360|http://issues.apache.org/jira/browse/LUCENE-1360] is a more complete version of this problem. Please close this in favor of 1360.
> norm compression breaks ranking for small fields
> ------------------------------------------------
>
> Key: LUCENE-517
> URL: https://issues.apache.org/jira/browse/LUCENE-517
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index, Search
> Affects Versions: 1.9
> Environment: N/A
> Reporter: Randy Puttick
> Priority: Minor
>
> The scheme of compressing document norms to one byte loses a lot of information. This completely breaks search ranking on small fields because there is no way to see the difference between documents with shorter and longer fields that contain the same number of matching query terms. Unfortunately the export of norms as a byte array seems to be pretty well embedded in the code base so a fix would seem to require a major rev.
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