[jira] Commented: (LUCENE-2557) FuzzyQuery - fuzzy terms and misspellings are ranked higher than exact matches

["Robert Muir (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12891673#action_12891673 ] 

Robert Muir commented on LUCENE-2557:
-------------------------------------

I dont understand why we need to average any idfs? this seems really costly and i think in general the idea of fuzzy is to find misspellings.

furthermore i dont understand why its important if the idf if the query term exists in the index or not, because the query itself could be misspelled.


> 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: Query/Scoring
>    Affects Versions: 3.0.2
>            Reporter: Jingkei Ly
>         Attachments: idf-scoring-test-case.patch, LUCENE-2557.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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