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Posted to dev@lucene.apache.org by bu...@apache.org on 2005/01/09 14:58:09 UTC

DO NOT REPLY [Bug 33019] New: - BooleanScorer can score documents in non increasing order

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http://issues.apache.org/bugzilla/show_bug.cgi?id=33019

           Summary: BooleanScorer can score documents in non increasing
                    order
           Product: Lucene
           Version: CVS Nightly - Specify date in submission
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: minor
          Priority: P1
         Component: Search
        AssignedTo: lucene-dev@jakarta.apache.org
        ReportedBy: paul.elschot@xs4all.nl
 BugsThisDependsOn: 31785
OtherBugsDependingO 32965
             nThis:


This has been the subject of occasional discussions on lucene-dev 
since quite some time. Doug once called this "arguably a bug" 
so I'm giving a minor severity. 
 
It should be noted that this behaviour of BooleanScorer does not 
cause bugs in the current versions of Lucene. 
 
The main reason I'm entering it now is that it blocks the introduction 
of filters based on other more compact data structures than 
java.util.BitSet (see bug 32965). 
 
An alternative scorer for BooleanQuery is available that always 
scores documents in increasing document order (see bug 31785). 
It might also be possible to improve the current BooleanScorer 
to always score documents in increasing order. 
 
A somewhat related problem is that the current BooleanScorer does 
not implement skipTo(). 
 
Regards, 
Paul Elschot

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