lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-524) Current implementation of fuzzy and wildcard queries inappropriately implemented as Boolean query rewrites
Date Wed, 12 Nov 2008 23:57:44 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647127#action_12647127
] 

Mark Miller commented on LUCENE-524:
------------------------------------

Anyone think this still has merit? It looks interesting to me but I'm not so sure its the
right approach...

> 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

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org


Mime
View raw message