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Tim Allison commented on LUCENE-5033: ------------------------------------- I agree that it appears to, but if you want a distance > 2, the current levenshtein automaton doesn't allow that (http://blog.mikemccandless.com/2011/03/lucenes-fuzzyquery-is-100-times-faster.html?showComment=1303598602291#c3051732466052117784). The classic QueryParser silently converts distances > 2 to 2. If I understand SlowFuzzyQuery correctly, it uses the levenshtein automaton for distances <= 2, but it runs brute force if the distance is > 2. My personal preference would be to undeprecate SlowFuzzyQuery (certainly leave it in the sandbox) because it offers a capability that the current levenshtein automaton doesn't. In cases where the indices are very large, it wouldn't make sense to expose distance > 2 capability; but on small to medium indices, there are use cases that require it. > SlowFuzzyQuery appears to fail with edit distance >=3 in some cases > ------------------------------------------------------------------- > > Key: LUCENE-5033 > URL: https://issues.apache.org/jira/browse/LUCENE-5033 > Project: Lucene - Core > Issue Type: Bug > Components: modules/other > Affects Versions: 4.3 > Reporter: Tim Allison > Priority: Minor > Attachments: LUCENE-5033.patch > > > Levenshtein edit btwn "monday" and "montugu" should be 4. The following > shows a query with "sim" set to 3, and there is a hit. > public void testFuzzinessLong2() throws Exception { > Directory directory = newDirectory(); > RandomIndexWriter writer = new RandomIndexWriter(random(), directory); > addDoc("monday", writer); > > IndexReader reader = writer.getReader(); > IndexSearcher searcher = newSearcher(reader); > writer.close(); > SlowFuzzyQuery query; > query = new SlowFuzzyQuery(new Term("field", "montugu"), 3, 0); > ScoreDoc[] hits = searcher.search(query, null, 1000).scoreDocs; > assertEquals(0, hits.length); > } -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org