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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7416) BooleanQuery rewrite optimizations
Date Thu, 25 Aug 2016 14:57:20 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15437029#comment-15437029
] 

Uwe Schindler commented on LUCENE-7416:
---------------------------------------

Yeah. Remove the distinct() and done.

> BooleanQuery rewrite optimizations
> ----------------------------------
>
>                 Key: LUCENE-7416
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7416
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>    Affects Versions: master (7.0)
>            Reporter: Spyros Kapnissis
>            Priority: Minor
>             Fix For: master (7.0), 6.3
>
>         Attachments: LUCENE-7146-simplific1.patch, LUCENE-7146.patch
>
>
> A couple of BooleanQuery rewrites / optimizations. 
> First, as discussed on the user group, a BooleanQuery with a query that is both a SHOULD
and a FILTER can be rewritten as a single MUST query, but care must be taken to decrement
minShouldMatch by 1.
> Another case is if a query is both required (MUST or FILTER) and MUST_NOT at the same
time, it can be converted to a MatchNoDocsQuery (although I haven't discussed this yet so
hopefully I'm not missing something!).



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