lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Erik Hatcher (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (LUCENE-4500) Loosen up DirectSpellChecker's minPrefix requirements
Date Mon, 22 Oct 2012 19:50:12 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481723#comment-13481723
] 

Erik Hatcher edited comment on LUCENE-4500 at 10/22/12 7:49 PM:
----------------------------------------------------------------

This patch to DirectSpellChecker does the trick (using accuracy=0.8 or less in the description
example):

{code}
-    FuzzyTermsEnum e = new FuzzyTermsEnum(terms, atts, term, editDistance, Math.max(minPrefix,
editDistance-1), true);
+    FuzzyTermsEnum e = new FuzzyTermsEnum(terms, atts, term, editDistance, minPrefix, true);
{code}

In a conversation with Robert Muir, we agreed that this, rather, should keep the default that
restricts to minPrefix=1 when editDistance=2, but made optional to allow using a minPrefix=0.
                
      was (Author: ehatcher):
    This patch to DirectSpellChecker does the trick (using accuracy=0.8 or less in the description
example):

{code}
-    FuzzyTermsEnum e = new FuzzyTermsEnum(terms, atts, term, editDistance, Math.max(minPrefix,
editDistance-1), true);
+    FuzzyTermsEnum e = new FuzzyTermsEnum(terms, atts, term, editDistance, minPrefix, true);
{code}

In a conversation with Robert Muir, we agreed that this, rather, should keep the default that
restricts to minPrefix=1 when editDistance=2, but made optional to use a minPrefix=0.
                  
> Loosen up DirectSpellChecker's minPrefix requirements
> -----------------------------------------------------
>
>                 Key: LUCENE-4500
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4500
>             Project: Lucene - Core
>          Issue Type: Improvement
>    Affects Versions: 4.0
>            Reporter: Erik Hatcher
>            Priority: Minor
>
> DirectSpellChecker currently mandates a minPrefix of 1 when editDistance=2.  This prohibits
a query of "nusglasses" from matching the indexed "sunglasses" term.
> Granted, there can be performance issues with using a minPrefix of 0, but it's a risk
that a user should be allowed to take if needed.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

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


Mime
View raw message