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From "Karthik N S" <kart...@controlnet.co.in>
Subject RE: DEFAULT_OPERATOR_AND
Date Fri, 19 Aug 2005 07:12:39 GMT
Hi Erik

 Apologies...........


 With refrence to the code as below


public static Query Sparse(String texts, String[] fields, Analyzer analyzer)
{
	Query bQuery = null;
	try {
		for (int i = 0; i < fields.length; i++) {
			QueryParser qp = new QueryParser(fields[i], analyzer);

qp.setOperator(org.apache.lucene.queryParser.QueryParser.DEFAULT_OPERATOR_AN
D);
			bQuery = qp.parse(texts);
			System.out.println("QUERY ANDED :" + bQuery.toString());
		}
	} catch(Exception pxe) {pxe.printStackTrace();}
	return bQuery;
}

Using a search word  = 'blue dial watch'

The Query Represented as   +(content:blue content:dial content:watch)

returned me more then 100+ hits

But When used the Query representation on the same Index using LUKE

+content:blue +content:dial +content:watch

returned 10+ hits

Please can u give enlighten me  with more some ideas....


With regards
Karthik




-----Original Message-----
From: Erik Hatcher [mailto:erik@ehatchersolutions.com]
Sent: Thursday, August 18, 2005 4:07 PM
To: java-user@lucene.apache.org
Subject: Re: DEFAULT_OPERATOR_AND



On Aug 18, 2005, at 1:48 AM, Karthik N S wrote:
> Does this mean MultiFieldQueryParser will always have to use
> 'DEFAULT_OPERATOR_OR' instead of DEFAULT_OPERATOR_AND
> operations.

Yup, that's what I said :)

>   Is there any alternative in handling this processs ( other then API
> 'replaceAll(" ", " AND ")' substution)

Of course there are alternatives!   MFQP is merely a thin layer on
top of QueryParser.  You're free to create Query's anyway you like.
Here's one of the parse methods from MFQP:

   public static Query parse(String[] queries, String[] fields,
       Analyzer analyzer) throws ParseException
   {
     if (queries.length != fields.length)
       throw new IllegalArgumentException("queries.length !=
fields.length");
     BooleanQuery bQuery = new BooleanQuery();
     for (int i = 0; i < fields.length; i++)
     {
       QueryParser qp = new QueryParser(fields[i], analyzer);
       Query q = qp.parse(queries[i]);
       bQuery.add(q, BooleanClause.Occur.SHOULD);
     }
     return bQuery;
   }

You could simply create a piece of code like that with the
setOperator in there.

     Erik



>
>
> Please enlighten me
>
>
>
> With regards
> Karthik
>
>
> -----Original Message-----
> From: Erik Hatcher [mailto:erik@ehatchersolutions.com]
> Sent: Thursday, August 18, 2005 7:09 AM
> To: java-user@lucene.apache.org
> Subject: Re: DEFAULT_OPERATOR_AND
>
>
>
> On Aug 17, 2005, at 2:45 AM, Karthik N S wrote:
>
>> Hi  Lucener's
>>
>> Apologies..........
>>
>> I have seen forms using  'DEFAULT_OPERATOR_AND'  with  something
>> like below
>>
>>
>>> QueryParser parser = new QueryParser( "terms", analyzer);
>>> parser.setOperator(QueryParser.DEFAULT_OPERATOR_AND);
>>> query = parser.parse(TextParameters);
>>>
>>
>> How to use the DEFAULT_OPERATOR_AND  when using
>> MultiFieldQueryParser  as below
>>
>> "query = MultiFieldQueryParser.parse("text",fields,analyzer);" ?
>>
>> [ I also searched the other Form's for same but no answers.]
>>
>
> MultiFieldQueryParser does not adhere to the default operator
> setting, and will always use OR.
>
>      Erik
>
>
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