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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4935) CustomScoreQuery has broken boosting
Date Tue, 16 Apr 2013 21:57:17 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633441#comment-13633441
] 

Michael McCandless commented on LUCENE-4935:
--------------------------------------------

+1 for the 2nd approach.
                
> CustomScoreQuery has broken boosting
> ------------------------------------
>
>                 Key: LUCENE-4935
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4935
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/query/scoring
>            Reporter: Robert Muir
>         Attachments: LUCENE-4935.patch, LUCENE-4935.patch
>
>
> CustomScoreQuery wrongly applies boost^2 instead of boost.
> It wrongly incorporates its boost into the normalization factor passed down to subquery
(like booleanquery does) and *also* multiplies it directly in its scorer.
> The only reason the test passes today is because it compares raw score magnitudes when
querynorm is on, which normalizes this away.
> Changing the test to use newSearcher() demonstrates the brokenness.

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