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From Otmar Caduff <ocad...@gmail.com>
Subject Re: ComplexPhraseQueryParser with wildcards
Date Tue, 20 Dec 2016 15:18:20 GMT
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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