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https://issues.apache.org/jira/browse/LUCENE-7840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833787#comment-16833787
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Atri Sharma commented on LUCENE-7840:
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+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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