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From "Kalthoff, Marcus" <>
Subject boolean AND search
Date Thu, 27 Feb 2003 13:39:14 GMT

I can understand that you need additional + before the search-words to get a "real" AND, but
what confuses me is that 

10060 && 10040

(which should be the same as AND) does a real boolean AND like

+10060 AND +10040   

In the query syntax docu, you read "The symbol && can be used in place of the word
AND.". But it is totally different. How do I explain that to my users?


From: Daniel Calvo <>
Subject: Boolean AND query
Date: Thu, 21 Feb 2002 14:12:16 -0300
Content-Type: text/plain;


To achieve what you want, you need to use the required operand (+)


> -----Original Message-----
> From: Aruna Raghavan []
> Sent: quinta-feira, 21 de fevereiro de 2002 13:44
> To: 'Lucene Users List'
> Subject: Boolean AND query
> Hello,
> Has anyone run into problems with boolean AND query? Basically, I am using
> the following code to do the query to look for 
> 10060 AND 10040
> BooleanQuery bq = new BooleanQuery();
> Analyzer analyzer = new StandardAnalyzer();
> Query query = QueryParser.parse(m_strKeyword, "pageText", analyzer);
>  bq.add(query, true, false);
> In this case, I am just using one query to add to bq but there can be more. 
> I am getting correct results when 10060 AND 10040 exists in the document.
> But when one of them does not exist, I am still getting the same results. In
> other words, AND seems to be acting like an OR. I noticed this in the latest
> RC4 as well as an older lucene build from before lucene joined jakarta.

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