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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-6754) Optimize IndexSearcher.count for simple queries
Date Thu, 20 Aug 2015 17:56:46 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-6754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adrien Grand updated LUCENE-6754:
---------------------------------
    Attachment: LUCENE-6754.patch

Here is a patch. count(MatchAllDocsQuery) returns reader.numDocs() and count(TermQuery) returns
the sum of the doc freqs if there are no deletions.

> Optimize IndexSearcher.count for simple queries
> -----------------------------------------------
>
>                 Key: LUCENE-6754
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6754
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-6754.patch
>
>
> IndexSearcher.count currently always create a collector to compute the number of hits,
but it could optimize some queries like MatchAllDocsQuery or TermQuery.



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