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Posted to issues@lucene.apache.org by "Adrien Grand (Jira)" <ji...@apache.org> on 2022/02/09 10:18:00 UTC

[jira] [Created] (LUCENE-10412) Improve handling of MatchNoDocsQuery in rewrite rules

Adrien Grand created LUCENE-10412:
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             Summary: Improve handling of MatchNoDocsQuery in rewrite rules
                 Key: LUCENE-10412
                 URL: https://issues.apache.org/jira/browse/LUCENE-10412
             Project: Lucene - Core
          Issue Type: Wish
            Reporter: Adrien Grand


Having MatchNoDocsQuery in your query tree usually doesn't make the query slower, but by recognizing it in rewrite rules, we could perform rewrites which would then sometimes unlock other rewrite rules.

For instance if you have a boolean query with 2 should clauses where one is a MatchAllDocsQuery and the other one is a MatchNoDocsQuery, we would naively run it as a conjunction, while we could rewrite it to a MatchAllDocsQuery and leverage its specialized bulk scorer.



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