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Thread: QueryBuilder fuzzy syntax?

This question is answered. Helpful answers available: 2. Correct answers available: 1.


Permlink Replies: 8 - Pages: 1 - Last Post: Dec 3, 2011 4:47 AM Last Post By: longchamp
Trevor Burnham

Posts: 4
Registered: 7/11/09
QueryBuilder fuzzy syntax?
Posted: Jul 11, 2009 9:11 AM
 
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I'm trying to construct a query programmatically using CompassQueryBuilder (version 2.2.0), and I'm a bit confused about how fuzzy() is supposed to work. Based on the javadocs, I'd expect these two statements to be equivalent:

queryBuilder.fuzzy("all", word);
queryBuilder.queryString(word + "~").toQuery();

Yet the fuzzy() query returns nothing. I've tried substituting a specific class alias for "all"; still no results. I do get results when I use a field alias, but that's not suitable for my purposes. How is fuzzy() supposed to be used? Is there another way of making fuzzy queries without invoking the query string parser? Also, how do I distinguish a fuzzy phrase search from a fuzzy search for individual terms?

Edited by: Trevor Burnham on Jul 11, 2009 9:11 AM

Edited by: Trevor Burnham on Jul 11, 2009 9:13 AM
Trevor Burnham

Posts: 4
Registered: 7/11/09
Re: QueryBuilder fuzzy syntax?
Posted: Jul 11, 2009 9:47 AM   in response to: Trevor Burnham in response to: Trevor Burnham
 
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OK, partial answer: Turns out the "all" field has been called "zzz-all" since version 2.0.0. I wish the documentation were clearer about this. I also wish that Compass would complain when you try to programmatically query a non-existent alias. Correcting my example to

queryBuilder.fuzzy("zzz-all", word);

fixes it. I'm still not sure how to distinguish fuzzy phrase searches from fuzzy multi-term searches. Any ideas?
Trevor Burnham

Posts: 4
Registered: 7/11/09
Re: QueryBuilder fuzzy syntax?
Posted: Jul 11, 2009 10:09 AM   in response to: Trevor Burnham in response to: Trevor Burnham
 
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So, for instance, I have an object indexed with a field value of "banana split"; these queries all return it:

queryBuilder.fuzzy("zzz-all", "banana");
queryBuilder.fuzzy("zzz-all", "split");
queryBuilder.bool().addMust( queryBuilder.fuzzy("zzz-all", "banana") ).addMust( queryBuilder.fuzzy("zzz-all", "split") ).toQuery();
queryBuilder.queryString("banana split").toQuery();
queryBuilder.queryString("\"banana split\"").toQuery();

However, I'm very surprised that this query does not:

queryBuilder.fuzzy("zzz-all", "banana split");

Nor does:

queryBuilder.fuzzy("zzz-all", "\"banana split\"");

How do I programmatically do a fuzzy phrase search?
Trevor Burnham

Posts: 4
Registered: 7/11/09
Re: QueryBuilder fuzzy syntax?
Posted: Jul 13, 2009 5:33 PM   in response to: Trevor Burnham in response to: Trevor Burnham
 
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OK, it turns out that what I'm asking for is not implemented in Lucene for performance reasons. (Fuzzy searching for a single term is costly, fuzzy searching for multiple consecutive terms is exponentially costlier.) I've filed a JIRA:
http://issues.compass-project.org/browse/ CMP-884
Shay Banon

Posts: 4,028
Registered: 9/6/05
Re: QueryBuilder fuzzy syntax?
Posted: Jul 14, 2009 2:01 PM   in response to: Trevor Burnham in response to: Trevor Burnham
 
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Thanks for chasing that up. I actually did not know that and figured it out during the weekend (diving a bit into Lucene source code again). Never got around to needing that...
louisvuittonbox

Posts: 411
Registered: 8/23/11
Re: QueryBuilder fuzzy syntax?
Posted: Aug 23, 2011 9:35 PM   in response to: Trevor Burnham in response to: Trevor Burnham
 
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Posts: 523
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Posted: Oct 5, 2011 9:33 PM   in response to: Trevor Burnham in response to: Trevor Burnham
 
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longchamp

Posts: 272
Registered: 12/1/11
Longchamp
Posted: Dec 3, 2011 4:47 AM   in response to: Trevor Burnham in response to: Trevor Burnham
 
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