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https://issues.apache.org/jira/browse/LUCENE-2557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226089#comment-13226089
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Paul taylor commented on LUCENE-2557:
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This would prevent prefix matches from being higher then exact matches but
doesn't work for the opposite problem, the differential between exact score
match and prefix match only is too great when using constant score for prefix
queries, and unreliable when prefix queries are scored. BUt I think my link
explains it much more clearly.
> FuzzyQuery - fuzzy terms and misspellings are ranked higher than exact matches
> ------------------------------------------------------------------------------
>
> Key: LUCENE-2557
> URL: https://issues.apache.org/jira/browse/LUCENE-2557
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/query/scoring
> Affects Versions: 3.0.2
> Reporter: Jingkei Ly
> Attachments: LUCENE-2557.patch, idf-scoring-test-case.patch
>
>
> The FuzzyQuery often causes misspellings to be ranked higher than the exact
> match, which seems to be an undesirable property generally.
> For example, in an index of surnames, if I search using a FuzzyQuery for
> "smith", the misspellings such as "smiith", or "smiht" would appear near the
> top of the search results ahead of documents that match "smith".
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