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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1557) Make constant-score rewrite the default for multi-term queries
Date Wed, 11 Mar 2009 11:25:50 GMT
Make constant-score rewrite the default for multi-term queries
--------------------------------------------------------------

                 Key: LUCENE-1557
                 URL: https://issues.apache.org/jira/browse/LUCENE-1557
             Project: Lucene - Java
          Issue Type: Improvement
    Affects Versions: 2.4.1
            Reporter: Michael McCandless
            Assignee: Michael McCandless
            Priority: Minor
             Fix For: 3.0


For queries that expand to multiple terms (PrefixQuery, RangeQuery, FuzzyQuery, WildcardQuery),
the default now is to rewrite to a BooleanQuery, which scales poorly, and can hit the dreaded
TooManyClauses (ungraceful degradation).

Except for FuzzyQuery (which we should fix with this issue), they all support setConstantScoreRewrite,
which scales better.

In 3.0 we should make constantScoreRewrite the default, and leave an option to turn it off.

This is a spinoff from LUCENE-998.

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