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https://issues.apache.org/jira/browse/LUCENE-6360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14554941#comment-14554941
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ASF subversion and git services commented on LUCENE-6360:
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Commit 1680946 from [~jpountz] in branch 'dev/trunk'
[ https://svn.apache.org/r1680946 ]
LUCENE-6360: Make TermsQuery rewrite as a disjunction when there are few terms.
> TermsQuery should rewrite to a ConstantScoreQuery over a BooleanQuery when
> there are few terms
> ----------------------------------------------------------------------------------------------
>
> Key: LUCENE-6360
> URL: https://issues.apache.org/jira/browse/LUCENE-6360
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-6360.patch, LUCENE-6360.patch, LUCENE-6360.patch
>
>
> TermsQuery helps when there are lot of terms from which you would like to
> compute the union, but it is a bit harmful when you have few terms since it
> cannot really skip: it always consumes all documents matching the underlying
> terms.
> It would certainly help to rewrite this query to a ConstantScoreQuery over a
> BooleanQuery when there are few terms in order to have actual skip support.
> As usual the hard part is probably to figure out the threshold. :)
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