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https://issues.apache.org/jira/browse/LUCENE-839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12482671
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Michael Schlegel commented on LUCENE-839:
-----------------------------------------
I use release 2.1.0.
Here is an example to demonstrate the problem:
public class WildcardTest
{
public static void main(String[] args) throws Exception
{
Analyzer analyzer = new StandardAnalyzer();
RAMDirectory indexStore = getIndexStore("fulltext", new
String[]{"Forschungsgebiet", "business"}, analyzer);
IndexSearcher searcher = new IndexSearcher(indexStore);
QueryParser parser = new QueryParser( "fulltext", analyzer );
parser.setAllowLeadingWildcard(true);
Query query1 = parser.parse("fulltext:*usines*");
Query query2 = parser.parse("fulltext:*usines?");
Hits result = searcher.search(query1);
System.out.println( "Query '" + query1.toString() + "' found: " +
result.length() + " documents !");
result = searcher.search(query2);
System.out.println( "Query '" + query2.toString() + "' found: " +
result.length() + " documents !");
searcher.close();
indexStore.close();
}
private static RAMDirectory getIndexStore(String field, String[] contents,
Analyzer p_Analyzer)
throws IOException
{
RAMDirectory indexStore = new RAMDirectory();
IndexWriter writer = new IndexWriter(indexStore, p_Analyzer, true);
for (int i = 0; i < contents.length; ++i)
{
Document doc = new Document();
doc.add(new Field(field, contents[i], Field.Store.YES,
Field.Index.TOKENIZED));
writer.addDocument(doc);
}
writer.optimize();
writer.close();
return indexStore;
}
}
Output:
Query 'fulltext:*usines*' found: 0 documents !
Query 'fulltext:*usines?' found: 1 documents !
> WildcardQuery do not find documents if leading and trailing * is used
> ---------------------------------------------------------------------
>
> Key: LUCENE-839
> URL: https://issues.apache.org/jira/browse/LUCENE-839
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 1.9, 2.0.0, 2.1
> Reporter: Michael Schlegel
> Assigned To: Doron Cohen
>
> I indexed a document which contains the word "business".
> If i use query "business" then document will be found.
> If i use query "busines*" then document will be found.
> If i use query "*usiness" then document will be found.
> If i use query "*usines?" then document will be found.
> If i use query "?usines?" then document will be found.
> But if i use query "*usines*" then document will not be found.
> if i use query "*usi*nes*" then document will be found.
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