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Posted to dev@lucene.apache.org by "Jim Ferenczi (JIRA)" <ji...@apache.org> on 2019/07/26 09:26:00 UTC

[jira] [Created] (LUCENE-8935) BooleanQuery with no scoring clauses cannot skip documents when running TOP_SCORES mode

Jim Ferenczi created LUCENE-8935:
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             Summary: BooleanQuery with no scoring clauses cannot skip documents when running TOP_SCORES mode
                 Key: LUCENE-8935
                 URL: https://issues.apache.org/jira/browse/LUCENE-8935
             Project: Lucene - Core
          Issue Type: Improvement
            Reporter: Jim Ferenczi


Today a boolean query that is composed of filtering clauses only (more than one) cannot skip documents when the search is executed with the TOP_SCORES mode. However since all documents have a score of 0 it should be possible to early terminate the query as soon as we collected enough top hits. Wrapping the resulting boolean scorer in a constant score scorer should allow early termination in this case and would speed up the retrieval of top hits case considerably if the total hit count is not requested.



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