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Posted to java-user@lucene.apache.org by Michael Dodson <mg...@mac.com> on 2006/04/18 20:10:43 UTC
wildcards with SpanQuery
Is it possible to use wildcards with SpanNearQuery?
For example, if the user enters "fast car" with a slop of 1 things
like "fast cars" "faster cars" "fast brown cars" etc would be found?
Thanks,
Mike
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Re: wildcards with SpanQuery
Posted by Erik Hatcher <er...@ehatchersolutions.com>.
There isn't a SpanWildcardQuery, per se, but there is a SpanRegexQuery:
<http://svn.apache.org/repos/asf/lucene/java/trunk/contrib/regex/src/
java/org/apache/lucene/search/regex/>
It can be used to achieve the same sort of thing, only using standard
regex syntax like fast.* (instead of fast*)
But, stemming should be considered as well. It'd certainly be more
performant using a regular PhraseQuery with terms analyzed and
stemmed, matching terms analyzed the same way during indexing.
Erik
On Apr 18, 2006, at 2:33 PM, karl wettin wrote:
>
> 18 apr 2006 kl. 20.10 skrev Michael Dodson:
>
>> Is it possible to use wildcards with SpanNearQuery?
>>
>> For example, if the user enters "fast car" with a slop of 1 things
>> like "fast cars" "faster cars" "fast brown cars" etc would be found?
>
> You might be looking for stem-analysis? You can, for instance, take
> a look at the snowball stemmers.
>
> Wildcards would be if the user enters 'fast* car'.
>
> But to answer your question, there is no SpanWildcardQuery as far
> as I know. You could make one though. And I can imagine it would,
> just as SpanFuzzyQuery, be really slow and virtually unusable in
> the hand of the users.
>
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Re: wildcards with SpanQuery
Posted by karl wettin <ka...@snigel.net>.
18 apr 2006 kl. 20.10 skrev Michael Dodson:
> Is it possible to use wildcards with SpanNearQuery?
>
> For example, if the user enters "fast car" with a slop of 1 things
> like "fast cars" "faster cars" "fast brown cars" etc would be found?
You might be looking for stem-analysis? You can, for instance, take a
look at the snowball stemmers.
Wildcards would be if the user enters 'fast* car'.
But to answer your question, there is no SpanWildcardQuery as far as
I know. You could make one though. And I can imagine it would, just
as SpanFuzzyQuery, be really slow and virtually unusable in the hand
of the users.
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