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From "Robert Muir (JIRA)" <>
Subject [jira] Commented: (LUCENE-1557) Make constant-score rewrite the default for multi-term queries
Date Tue, 10 Nov 2009 22:27:27 GMT


Robert Muir commented on LUCENE-1557:

Uwe,  I am a little confused about this issue. The MultiTermQuery now has a lot of smarts
with regards to this. I feel it is obselete

Is this kept open just for the FuzzyQuery? 

> Make constant-score rewrite the default for multi-term queries
> --------------------------------------------------------------
>                 Key: LUCENE-1557
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>    Affects Versions: 2.4.1
>            Reporter: Michael McCandless
>            Assignee: Uwe Schindler
>            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
> This is a spinoff from LUCENE-998.

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