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From Mikhail Khludnev <m...@apache.org>
Subject Re: ComplexPhraseQueryParser with wildcards
Date Tue, 20 Dec 2016 18:19:21 GMT
It probably deserves a jira, although it's minor.

On Tue, Dec 20, 2016 at 6:18 PM, Otmar Caduff <ocaduff@gmail.com> wrote:

> Thanks for your response, Ahmet!
>
> I agree, a meaningful phrase query should have at least two terms. However,
> why should the query "john" (without wildcard) then work?
>
> I'm trying to figure out if I can use ComplexPhraseQueryParser as a default
> in my application or if I have to handle some cases differently.
>
> Otmar
>
> On Tue, Dec 20, 2016 at 3:17 PM, Ahmet Arslan <iorixxx@yahoo.com.invalid>
> wrote:
>
> > Hi Otmar,
> >
> > A single term inside quotes is meaningless. A phrase query should have at
> > least two terms in it, shouldn't it?
> >
> > What is your intention with a such "john*" query?
> >
> > Ahmet
> >
> >
> > On Tuesday, December 20, 2016 4:56 PM, Otmar Caduff <ocaduff@gmail.com>
> > wrote:
> >
> >
> >
> > Hi,
> >
> > I have an index with a single document with a field "field" and textual
> > content "johnny peters" and I am using
> > org.apache.lucene.queryparser.complexPhrase.ComplexPhraseQueryParser to
> > parse the query:
> >    field: (john* peter)
> > When searching with this query, I am getting the document as expected.
> > However with this query:
> >    field: ("john*" "peter")
> > I am getting the following exception:
> > Exception in thread "main" java.lang.IllegalArgumentException: Unknown
> > query type "org.apache.lucene.search.PrefixQuery" found in phrase query
> > string "john*"
> > at
> > org.apache.lucene.queryparser.complexPhrase.ComplexPhraseQueryParser$
> > ComplexPhraseQuery.rewrite(ComplexPhraseQueryParser.java:268)
> > at org.apache.lucene.search.BooleanQuery.rewrite(BooleanQuery.java:278)
> > at org.apache.lucene.search.IndexSearcher.rewrite(
> IndexSearcher.java:836)
> > at
> > org.apache.lucene.search.IndexSearcher.createNormalizedWeight(
> > IndexSearcher.java:886)
> > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:535)
> > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:744)
> > at
> > org.apache.lucene.search.IndexSearcher.searchAfter(
> IndexSearcher.java:460)
> > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:489)
> > at ComplexQueryTest.main(ComplexQueryTest.java:36)
> >
> > Note: the exception is not thrown during the parse() method call, but
> > during the search() method call.
> >
> > I don't see why the ComplexQueryParser can't handle this. Am I misusing
> it?
> > Or should I file a bug on Jira?
> >
> > I'm on Lucene 5.5.1, but the situation looks the same on 6.3.0. Any help
> is
> > appreciated!
> >
> > Otmar
> >
> > The code to reproduce my issue:
> >
> >
> > import org.apache.lucene.analysis.standard.StandardAnalyzer;
> > import org.apache.lucene.document.Document;
> > import org.apache.lucene.document.Field.Store;
> > import org.apache.lucene.document.TextField;
> > import org.apache.lucene.index.DirectoryReader;
> > import org.apache.lucene.index.IndexReader;
> > import org.apache.lucene.index.IndexWriter;
> > import org.apache.lucene.index.IndexWriterConfig;
> > import org.apache.lucene.queryparser.complexPhrase.
> > ComplexPhraseQueryParser;
> > import org.apache.lucene.search.IndexSearcher;
> > import org.apache.lucene.search.Query;
> > import org.apache.lucene.search.TopDocs;
> > import org.apache.lucene.store.RAMDirectory;
> >
> > public class ComplexQueryTest {
> >
> > public static void main(String[] args) throws Throwable {
> > RAMDirectory directory = new RAMDirectory();
> > IndexWriter writer = new IndexWriter(directory, new IndexWriterConfig(new
> > StandardAnalyzer()));
> >
> > Document doc1 = new Document();
> > doc1.add(new TextField("field", "johnny peters", Store.NO));
> > writer.addDocument(doc1);
> >
> > writer.commit();
> > writer.close();
> >
> > IndexReader reader = DirectoryReader.open(directory);
> > IndexSearcher searcher = new IndexSearcher(reader);
> > ComplexPhraseQueryParser parser = new ComplexPhraseQueryParser("field",
> > new
> > StandardAnalyzer());
> > TopDocs topDocs;
> >
> > Query queryOk = parser.parse("field: (john* peters)");
> > topDocs = searcher.search(queryOk, 2);
> > System.out.println("found " + topDocs.totalHits + " docs");
> >
> > Query queryFail = parser.parse("field: (\"john*\" \"peters\")");
> > topDocs = searcher.search(queryFail, 2); // -----> throws the above
> > mentioned exception
> > System.out.println("found " + topDocs.totalHits + " docs");
> >
> > }
> >
> > }
> >
> > ---------------------------------------------------------------------
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> > For additional commands, e-mail: java-user-help@lucene.apache.org
> >
> >
>



-- 
Sincerely yours
Mikhail Khludnev

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