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From Erik Hatcher <e...@ehatchersolutions.com>
Subject Re: AW: QueryParser explicit and implicit search operator
Date Mon, 19 Feb 2007 13:44:26 GMT

On Feb 19, 2007, at 8:26 AM, Karimi-Tabatabaie Jamal wrote:
> You are right for a little complex query. I tested  the following  
> queries
>
> serach at lucenebool.com with query "Query" 155 results
> serach at lucenebool.com with query "Lucene" 270 results
> serach at lucenebool.com with query "Query AND Lucene" 109 results
> serach at lucenebool.com with query "Query Lucene" 109 results
> serach at lucenebool.com with query "Query OR Lucene" 316 results
>
> and came to the guess that it seems to be fixed for a query like "X  
> OR Y"! How else would you explain the 316 search results, when the  
> results for each single queries "Lucene" and "Query" is lesser than  
> 316?


We have the default operator set to AND for the QueryParser.  So  
"Query Lucene" (without quotes) is the same as "Query AND Lucene".   
Explicit ORs override this default.

	Erik


>
> Jamal
>
> -----Urspr√ľngliche Nachricht-----
> Von: Erik Hatcher [mailto:erik@ehatchersolutions.com]
> Gesendet: Samstag, 17. Februar 2007 06:27
> An: java-user@lucene.apache.org
> Betreff: Re: QueryParser explicit and implicit search operator
>
>
> On Feb 16, 2007, at 1:53 PM, Karimi-Tabatabaie Jamal wrote:
>> For my problem there seems to exist a lucence Bug
>> (http://issues.apache.org/jira/browse/LUCENE-167) but also it seems
>> that
>> it's solved in the Lucene integration on site http://
>> www.lucenebook.com.
>
> Where do you see the problem solved at lucenebook.com?   The "Query
> parsed to:" for this query <http://www.lucenebook.com/search?
> query=aaaaa+AND+bbbbb+OR+ccccc+AND+ddddd> is
>
> 	Query parsed to: +aaaaa bbbbb +ccccc +ddddd
>
> The OR caused the "bbbbb" term to not be required, yet all other
> terms are required.
>
> 	Erik
>
>
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