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Posted to java-user@lucene.apache.org by Vishal Bathija <vi...@gmail.com> on 2006/04/19 04:00:07 UTC
using boolean operators with the PhraseQuery
Hi,
I am trying to find the number of hits for a phrase using the
PhraseQuery. I would like to know how I could seach for 2 phrases at
the same time using the boolean operators OR, AND. The code snippet
that I use to seach for one phrase is
String test ="avoids deadlock"
String[] phraseTerms = test.split( " ");
PhraseQuery query =new PhraseQuery();
searcher = new IndexSearcher(rd);
Term[] phrTerm=new Term[phraseTerms.length];
for(int u=0; u<phraseTerms.length;u++)
{
phrTerm[u]=new Term("contents",phraseTerms[u]);
query.add(phrTerm[u]);
}
Hits hits = searcher.search(query);
How can I extend this to search for multiple phrases?
Regards
Vishal
--
Vishal Bathija
Graduate Student
Department of Computer Science & Systems Analysis
Miami University
Oxford,Ohio
Phone: (513)-461-9239
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Re: using boolean operators with the PhraseQuery
Posted by Paul Elschot <pa...@xs4all.nl>.
On Monday 24 April 2006 16:24, Vishal Bathija wrote:
> How do I get the spans (getSpans()) if I use the SpanNearQuery as a
> clause (subquery) in a BooleanQuery
You can't normally. The Spans of the subqueries are used to compute the scores
of each matching document, via SpanScorer and BooleanScorer2.
Boolean queries do not have Spans.
Regards,
Paul Elschot
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Re: using boolean operators with the PhraseQuery
Posted by Vishal Bathija <vi...@gmail.com>.
How do I get the spans (getSpans()) if I use the SpanNearQuery as a
clause (subquery) in a BooleanQuery
I currently have
SpanQuery [] clauses1 = new SpanQuery[phraseTerms1.length];
for(int count =0; count< phraseTerms1.length; count++)
{
clauses1[count]=phrase1[count];
}
SpanQuery [] clauses2 = new SpanQuery[phraseTerms2.length];
for(int count =0; count< phraseTerms2.length; count++)
{
clauses2[count]=phrase2[count];
}
SpanNearQuery near1 = new SpanNearQuery(clauses1, 0, true);
SpanNearQuery near2 = new SpanNearQuery(clauses2, 0, true);
I need the spans of either clause1 or clause2.
Vishal
On 4/22/06, Paul Elschot <pa...@xs4all.nl> wrote:
> On Friday 21 April 2006 21:11, Vishal Bathija wrote:
> > Hi,
> > I am trying to get the frequency of a phrase using the SpanNearQuery.
> > How can I use SpanNearQuery for boolean queries. The code I have is
> > for a single query. How can I extend this for multiple queries
>
> You can use SpanNearQuery as a clause (subquery) in a BooleanQuery
> or in a SpanOrQuery.
> See BooleanQuery.add() and the constructor of SpanOrQuery.
>
> Regards,
> Paul Elschot
>
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>
>
--
Vishal Bathija
Graduate Student
Department of Computer Science & Systems Analysis
Miami University
Oxford,Ohio
Phone: (513)-461-9239
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Re: using boolean operators with the PhraseQuery
Posted by Paul Elschot <pa...@xs4all.nl>.
On Friday 21 April 2006 21:11, Vishal Bathija wrote:
> Hi,
> I am trying to get the frequency of a phrase using the SpanNearQuery.
> How can I use SpanNearQuery for boolean queries. The code I have is
> for a single query. How can I extend this for multiple queries
You can use SpanNearQuery as a clause (subquery) in a BooleanQuery
or in a SpanOrQuery.
See BooleanQuery.add() and the constructor of SpanOrQuery.
Regards,
Paul Elschot
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Re: using boolean operators with the PhraseQuery
Posted by Vishal Bathija <vi...@gmail.com>.
Hi,
I am trying to get the frequency of a phrase using the SpanNearQuery.
How can I use SpanNearQuery for boolean queries. The code I have is
for a single query. How can I extend this for multiple queries
SpanTermQuery[] phrase = new SpanTermQuery[phraseTerms.length];
for(int termCount=0; termCount<phraseTerms.length ;termCount++)
{
phrase[termCount] = new SpanTermQuery(new Term("contents", phraseTerm
termCount]));
}
SpanQuery [] clauses = new SpanQuery[phraseTerms.length];
for(int count =0; count<phraseTerms.length ; count++)
{
clauses[count]=phrase[count];
}
SpanNearQuery near = new SpanNearQuery(clauses, 0, true);
Spans spans = near.getSpans(rd);
Regards
Vishal
On 4/19/06, Daniel Naber <lu...@danielnaber.de> wrote:
> On Mittwoch 19 April 2006 07:25, Vishal Bathija wrote:
>
> > Query= contents:"provides distribution" contents:"supports
> > distribution"
>
> Why are there two spaces between those words?
>
> > I am not sure why it returns 0, when I have both phrases present in the
> > docs.
>
> See
> http://wiki.apache.org/jakarta-lucene/LuceneFAQ#head-3558e5121806fb4fce80fc022d889484a9248b71
>
> Regards
> Daniel
>
> --
> http://www.danielnaber.de
>
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>
>
--
Vishal Bathija
Graduate Student
Department of Computer Science & Systems Analysis
Miami University
Oxford,Ohio
Phone: (513)-461-9239
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Re: using boolean operators with the PhraseQuery
Posted by Daniel Naber <lu...@danielnaber.de>.
On Mittwoch 19 April 2006 07:25, Vishal Bathija wrote:
> Query= contents:"provides distribution" contents:"supports
> distribution"
Why are there two spaces between those words?
> I am not sure why it returns 0, when I have both phrases present in the
> docs.
See
http://wiki.apache.org/jakarta-lucene/LuceneFAQ#head-3558e5121806fb4fce80fc022d889484a9248b71
Regards
Daniel
--
http://www.danielnaber.de
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Re: using boolean operators with the PhraseQuery
Posted by Vishal Bathija <vi...@gmail.com>.
I tried using the boolean query to perform an OR as below
BooleanQuery b1 = new BooleanQuery();
b1.add(query,BooleanClause .Occur .SHOULD );
b1.add(query2,BooleanClause .Occur .SHOULD );
Hits hits = searcher.search(b1);
System.out.println("Query= "+b1.toString() );
gave me
Query= contents:"provides distribution" contents:"supports distribution"
This returns 0 hits.
I am not sure why it returns 0, when I have both phrases present in the docs.
Vishal
On 4/19/06, Chris Hostetter <ho...@fucit.org> wrote:
>
> : The code above just adds the terms of phrase2 following the
> : terms for phrase1.
> : Can you give me an example building a BooleanQuery OR for the
> : newTerm1 and newTerm2.
>
> At no point does your code use a BooleanQuery ... have you looked at the
> javadocs for the BooleanQuery class?
>
>
>
> -Hoss
>
>
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>
>
--
Vishal Bathija
Graduate Student
Department of Computer Science & Systems Analysis
Miami University
Oxford,Ohio
Phone: (513)-461-9239
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Re: using boolean operators with the PhraseQuery
Posted by Chris Hostetter <ho...@fucit.org>.
: The code above just adds the terms of phrase2 following the
: terms for phrase1.
: Can you give me an example building a BooleanQuery OR for the
: newTerm1 and newTerm2.
At no point does your code use a BooleanQuery ... have you looked at the
javadocs for the BooleanQuery class?
-Hoss
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Re: using boolean operators with the PhraseQuery
Posted by Vishal Bathija <vi...@gmail.com>.
I am not sure if I understand you. Do I add the terms for the second
phrase immediately after I add the terms for the first phrase. When do
i wrap the PhraseQuery I construct into a BooleanQuery.
For instance
String newTerm1= "avoids deadlock";
String newTerm2= "reduces cost";
PhraseQuery query =new PhraseQuery();
String[] phraseTerms1 = newTerm1.split( " ");
Term[] phrTerm1=new Term[phraseTerms1.length];
for(int u=0; u<phraseTerms1.length;u++)
{
phrTerm1[u]=new Term("contents",phraseTerms1[u]);
query.add(phrTerm1[u]);
}
String[] phraseTerms2 = newTerm2.split( " ");
Term[] phrTerm2=new Term[phraseTerms2.length];
for(int u=0; u<phraseTerms2.length;u++)
{
phrTerm2[u]=new Term("contents",phraseTerms2[u]);
query.add(phrTerm2[u]);
}
Hits hits = searcher.search(query);
The code above just adds the terms of phrase2 following the
terms for phrase1.
Can you give me an example building a BooleanQuery OR for the
newTerm1 and newTerm2.
Thanks again
Vishal
On 4/18/06, Erik Hatcher <er...@ehatchersolutions.com> wrote:
> Wrap the PhraseQuery's inside a BooleanQuery to achieve AND/OR.
>
> Erik
>
>
> On Apr 18, 2006, at 10:00 PM, Vishal Bathija wrote:
>
> > Hi,
> > I am trying to find the number of hits for a phrase using the
> > PhraseQuery. I would like to know how I could seach for 2 phrases at
> > the same time using the boolean operators OR, AND. The code snippet
> > that I use to seach for one phrase is
> >
> > String test ="avoids deadlock"
> > String[] phraseTerms = test.split( " ");
> > PhraseQuery query =new PhraseQuery();
> > searcher = new IndexSearcher(rd);
> > Term[] phrTerm=new Term[phraseTerms.length];
> > for(int u=0; u<phraseTerms.length;u++)
> > {
> > phrTerm[u]=new Term("contents",phraseTerms[u]);
> > query.add(phrTerm[u]);
> > }
> >
> > Hits hits = searcher.search(query);
> >
> > How can I extend this to search for multiple phrases?
> >
> > Regards
> > Vishal
> > --
> > Vishal Bathija
> > Graduate Student
> > Department of Computer Science & Systems Analysis
> > Miami University
> > Oxford,Ohio
> > Phone: (513)-461-9239
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> > For additional commands, e-mail: java-user-help@lucene.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>
--
Vishal Bathija
Graduate Student
Department of Computer Science & Systems Analysis
Miami University
Oxford,Ohio
Phone: (513)-461-9239
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Re: using boolean operators with the PhraseQuery
Posted by Erik Hatcher <er...@ehatchersolutions.com>.
Wrap the PhraseQuery's inside a BooleanQuery to achieve AND/OR.
Erik
On Apr 18, 2006, at 10:00 PM, Vishal Bathija wrote:
> Hi,
> I am trying to find the number of hits for a phrase using the
> PhraseQuery. I would like to know how I could seach for 2 phrases at
> the same time using the boolean operators OR, AND. The code snippet
> that I use to seach for one phrase is
>
> String test ="avoids deadlock"
> String[] phraseTerms = test.split( " ");
> PhraseQuery query =new PhraseQuery();
> searcher = new IndexSearcher(rd);
> Term[] phrTerm=new Term[phraseTerms.length];
> for(int u=0; u<phraseTerms.length;u++)
> {
> phrTerm[u]=new Term("contents",phraseTerms[u]);
> query.add(phrTerm[u]);
> }
>
> Hits hits = searcher.search(query);
>
> How can I extend this to search for multiple phrases?
>
> Regards
> Vishal
> --
> Vishal Bathija
> Graduate Student
> Department of Computer Science & Systems Analysis
> Miami University
> Oxford,Ohio
> Phone: (513)-461-9239
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
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