Adrien Grand created LUCENE-6360:
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Summary: 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
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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