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https://issues.apache.org/jira/browse/LUCENE-4500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481723#comment-13481723
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Erik Hatcher edited comment on LUCENE-4500 at 10/22/12 7:49 PM:
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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.
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