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From "Atri Sharma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7840) BooleanQuery.rewriteNoScoring - optimize away any SHOULD clauses if at least 1 MUST/FILTER clause and 0==minShouldMatch
Date Mon, 06 May 2019 12:49:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833787#comment-16833787
] 

Atri Sharma commented on LUCENE-7840:
-------------------------------------

+1, will raise a patch

> BooleanQuery.rewriteNoScoring - optimize away any SHOULD clauses if at least 1 MUST/FILTER
clause and 0==minShouldMatch
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-7840
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7840
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Hoss Man
>            Priority: Major
>
> I haven't thought this through completely, let alone write up a patch / test case, but
IIUC...
> We should be able to optimize  {{ BooleanQuery rewriteNoScoring() }} so that (after converting
MUST clauses to FILTER clauses) we can check for the common case of {{0==getMinimumNumberShouldMatch()}}
and throw away any SHOULD clauses as long as there is is at least one FILTER clause.



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