Do MultiTermQuery boolean rewrites per segment
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Key: LUCENE-2690
URL: https://issues.apache.org/jira/browse/LUCENE-2690
Project: Lucene - Java
Issue Type: Improvement
Affects Versions: 4.0
Reporter: Uwe Schindler
Assignee: Uwe Schindler
Fix For: 4.0
Attachments: LUCENE-2690.patch
MultiTermQuery currently rewrites FuzzyQuery (using
TopTermsBooleanQueryRewrite), the auto constant rewrite method and the
ScoringBQ rewrite methods using a MultiFields wrapper on the top-level reader.
This is inefficient.
This patch changes the rewrite modes to do the rewrites per segment and uses
some additional datastructures (hashed sets/maps) to exclude duplicate terms.
All tests currently pass, but FuzzyQuery's tests should not, because it depends
for the minimum score handling, that the terms are collected in order..
Robert will fix FuzzyQuery in this issue, too. This patch is just a start.
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