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Date: Thu, 13 Nov 2008 07:07:44 -0800 (PST)
From: "Otis Gospodnetic (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Issue Comment Edited: (LUCENE-524) Current implementation of
 fuzzy and wildcard queries inappropriately implemented as Boolean query
 rewrites
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    [ https://issues.apache.org/jira/browse/LUCENE-524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647181#action_12647181 ] 

otis edited comment on LUCENE-524 at 11/13/08 7:06 AM:
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Based on the description, yes.  Doesn't this also sound a lot like that old Mark H's LUCENE-329 issue?


      was (Author: otis):
    Based on the description, yes.  Doesn't this also sound a lot like that old Mark H's issue that you commented on earlier?

  
> Current implementation of fuzzy and wildcard queries inappropriately implemented as Boolean query rewrites
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-524
>                 URL: https://issues.apache.org/jira/browse/LUCENE-524
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>    Affects Versions: 1.9
>            Reporter: Randy Puttick
>            Priority: Minor
>         Attachments: MultiTermQuery.java, MultiTermScorer.java
>
>
> The implementation of MultiTermQuery in terms of BooleanQuery introduces several problems:
> 1) Collisions with maximum clause limit on boolean queries which throws an exception.  This is most problematic because it is difficult to ascertain in advance how many terms a fuzzy query or wildcard query might involve.
> 2) The boolean disjunctive scoring is not appropriate for either fuzzy or wildcard queries.  In effect the score is divided by the number of terms in the query which has nothing to do with the relevancy of the results.
> 3) Performance of disjunctive boolean queries for large term sets is quite sub-optimal

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