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From Erik Hatcher <e...@ehatchersolutions.com>
Subject Re: DEFAULT_OPERATOR_AND
Date Fri, 19 Aug 2005 11:13:19 GMT

On Aug 19, 2005, at 3:12 AM, Karthik N S wrote:
>  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....

Well sure.... you're not building a BooleanQuery as shown in the  
original code from MFQP.  Simply copy the code I provided, and add  
the setOperator into it.  You left out important stuff!

     Erik

>
>
> 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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>>
>
>
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