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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2013/06/06 02:22:20 UTC
[jira] [Commented] (LUCENE-5033) SlowFuzzyQuery appears to fail
with edit distance >=3 in some cases
[ https://issues.apache.org/jira/browse/LUCENE-5033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13676532#comment-13676532 ]
Michael McCandless commented on LUCENE-5033:
--------------------------------------------
Thanks Tim! This looks like a great improvement: I like factoring out calcDistance from calcSimilarity.
And I like that we now take raw into account when figuring out which comparison to make to accept the term or not. Maybe we could improve it a bit: if raw is true we don't need to calcSimilarity right?
For my sanity ... where exactly was the bug in the original code?
> 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);
> }
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