Adrien Grand created LUCENE-6889:
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Summary: BooleanQuery.rewrite could easily optimize some simple
cases
Key: LUCENE-6889
URL: https://issues.apache.org/jira/browse/LUCENE-6889
Project: Lucene - Core
Issue Type: Improvement
Reporter: Adrien Grand
Priority: Minor
Follow-up of SOLR-8251: APIs and user interfaces sometimes encourage to write
BooleanQuery instances that are not optimal, for instance a typical case that
happens often with Solr/Elasticsearch is to send a request that has a
MatchAllDocsQuery as a query and some filter, which could be executed more
efficiently by directly wrapping the filter into a ConstantScoreQuery.
Here are some ideas of rewrite operations that BooleanQuery could perform:
- remove FILTER clauses when they are also a MUST clause
- rewrite queries of the form "+*:* #filter" to a ConstantScoreQuery(filter)
- rewrite to a MatchNoDocsQuery when a clause that is a MUST or FILTER clause
is also a MUST_NOT clause
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