Hi
Not sure I understand the question. You can add as many keywords as you want
to the query (like \"green tree\" \"short road\" sky bird) and it should
behave the same (i.e., search in each field.
Shai
On Nov 24, 2007 10:26 AM, Rapthor <[EMAIL PROTECTED]> wrote:
>
> Thanks for this example. I am uncertain about one detail: How do I achieve
> a
> search for multiple keywords. Not just "green tree" but also "short road",
> "sky", "bird"? Is there a chance to add those keywords to the "Query q =
> qp.parse("\"green tree\"");" command?
>
>
> Shai Erera wrote:
> >
> > How about using MultiFieldQueryParser. Here is a short main I wrote:
> >
> > Directory dir = new RAMDirectory();
> > Analyzer analyzer = new StandardAnalyzer();
> > IndexWriter writer = new IndexWriter(dir, analyzer);
> > Document doc = new Document();
> > doc.add(new Field("field1", "green tree", Store.NO,
> > Index.TOKENIZED
> > ));
> > writer.addDocument(doc);
> > doc = new Document();
> > doc.add(new Field("field2", "green tree", Store.NO,
> > Index.TOKENIZED
> > ));
> > writer.addDocument(doc);
> > writer.close();
> >
> > IndexSearcher searcher = new IndexSearcher(dir);
> > MultiFieldQueryParser qp = new MultiFieldQueryParser(new
> String[]
> > {
> > "field1", "field2" }, analyzer);
> > Query q = qp.parse("\"green tree\"");
> > if (q instanceof BooleanQuery /* Basically this should almost
> > always
> > be true */) {
> > BooleanClause[] clauses = ((BooleanQuery) q).getClauses();
> > for (int i = 0; i < clauses.length; i++) {
> > clauses[i].setOccur(Occur.SHOULD); /* This is their
> > setting
> > by default though */
> > }
> > }
> > Hits hits = searcher.search(q);
> > System.out.println(hits.length()); /* Should print 2. */
> > searcher.close();
> >
> >
> > On Nov 22, 2007 3:26 PM, Erick Erickson <[EMAIL PROTECTED]> wrote:
> >
> >> The semantics of the phrase query you're constructing probably aren't
> >> what you think. As best I can infer, you are trying to do something
> >> like
> >>
> >> "green tree" in field1
> >> or
> >> "green tree" in field 2
> >>
> >> but that's not even close to what you're constructing.
> >>
> >> It would help a show what the query you want is in some form
> >> like that above before trying to code it, because the actual
> >> query you're making is something like asking for the phrase
> >> "word1 in field1 word1 in field2 word2 in field1 word2 in field2"
> >>
> >> Actually, I can't render the semantics of what you're doing int
> English.
> >> And Lucene can't parse it either.
> >>
> >> I suspect you want something like
> >> PhraseQuery pq1
> >> PhraseQuery pq2
> >> for (String word : words) {
> >> pq1.add(...);
> >> pq2.add(...)
> >> }
> >> BooleanQuery bq().
> >> bq.add(p1, .... SHOULD);
> >> bq.add(p2, ... SHOULD);
> >>
> >> Index.search(bq);
> >>
> >> Best
> >> Erick
> >>
> >> On Nov 22, 2007 7:17 AM, Rapthor <[EMAIL PROTECTED]> wrote:
> >>
> >> >
> >> > There is no option to provide an Occur.SHOULD to the PhraseQuery. So
> >> where
> >> > does it go? I changed the source to look like this:
> >> >
> >> > PhraseQuery pq = new PhraseQuery();
> >> > for (String word : words) {
> >> > for (String field : fields) {
> >> > pq.add(new Term(field, word));
> >> > }
> >> > }
> >> > Hits hits = indexSearcher.search(pq);
> >> >
> >> > However, I get an exception:
> >> > java.lang.IllegalArgumentException: All phrase terms must be in the
> >> same
> >> > field: description:green tree
> >> >
> >> > I don't understand how to a) search for combinations of words like
> >> "green
> >> > tree", b) search in multiple fields (description, text, ...) and c)
> >> search
> >> > by a SHOULD restriction.
> >> > --
> >> > View this message in context:
> >> > http://www.nabble.com/AND-query-in-SHOULD-tf4855719.html#a13895700
> >> > Sent from the Lucene - Java Users mailing list archive at Nabble.com.
> >> >
> >> >
> >> > ---------------------------------------------------------------------
> >> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> >> > For additional commands, e-mail: [EMAIL PROTECTED]
> >> >
> >> >
> >>
> >
> >
> >
> > --
> > Regards,
> >
> > Shai Erera
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/AND-query-in-SHOULD-tf4855719.html#a13923009
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
>
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>
>
--
Regards,
Shai Erera
