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https://issues.apache.org/jira/browse/LUCENE-1345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662797#action_12662797
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Uwe Schindler commented on LUCENE-1345:
---------------------------------------

An additional case: User (A) uses a BooleanQuery and just adds the Filter to it 
and nothing more (no TermQueries and so on). In this case, ConstantScore 
algorithm must be used! But for the end user the API is always identical.

> Allow Filter as clause to BooleanQuery
> --------------------------------------
>
>                 Key: LUCENE-1345
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1345
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Paul Elschot
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: booleansetperf.txt, DisjunctionDISI.java, 
> DisjunctionDISI.patch, DisjunctionDISI.patch, 
> LUCENE-1345-Filter+Query-merge.patch, LUCENE-1345.patch, LUCENE-1345.patch, 
> OpenBitSetIteratorExperiment.java, TestIteratorPerf.java, 
> TestIteratorPerf.java
>
>


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