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From "Andrew Zhang" <zhanghuang...@gmail.com>
Subject Re: Query syntax improvement: Add one boundary range query syntax
Date Tue, 04 Nov 2008 15:33:09 GMT
Good suggestion! Thanks a lot, Chris.

On Tue, Nov 4, 2008 at 2:32 AM, Chris Hostetter <hossman_lucene@fucit.org>wrote:

>
> : Currently, lucene query syntax supports range query like foo:[a TO b]. I
> : didn't find a way to support one boundary range. (Or did I miss
> something?)
>
> FWIW: the SolrQueryParser (which subclasses the Lucene QueryParser)
> accomplishes this by treating '*' as special values.
>
> users that want similar behavior with Lucene should be able to get it
> fairly trivially with something like...
>
>  QueryParser qp = new QueryParser("foo", analyzer) {
>   protected Query newRangeQuery(String f, String a, String b, boolean i) {
>     return super.newRangeQuery(f, "*".equals(a) ? null : a,
>                                   "*".equals(b) ? null : b, i);
>   }
>  }
>
>
> but commiting a chacne like that to the existing Lucene QueryParser might
> break things for some people (although it seems unlikely)
>
>
>
> -Hoss
>
>
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-- 
Best regards,
Andrew Zhang

db4o - database for Android: www.db4o.com
http://zhanghuangzhu.blogspot.com/

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