--- C:\Users\xyt\AppData\Local\Temp\AnkhSVN\3179\QueryParser.27919.cs 20.04.2012  08:55:36
+++ C:\_VS.NET\se\Lucene-2_9_4\core\QueryParser\QueryParser.cs 17.04.2012  12:25:02

        /// <summary> Factory method for generating a query (similar to
        /// <see cref="GetWildcardQuery" />). Called when parser parses an input term
        /// token that uses prefix notation; that is, contains a single '*' wildcard
        /// character as its last character. Since this is a special case
        /// of generic wildcard term, and such a query can be optimized easily,
        /// this usually results in a different query object.
        /// <p/>
        /// Depending on settings, a prefix term may be lower-cased
        /// automatically. It will not go through the default Analyzer,
        /// however, since normal Analyzers are unlikely to work properly
        /// with wildcard templates.
        /// <p/>
        /// Can be overridden by extending classes, to provide custom handling for
        /// wild card queries, which may be necessary due to missing analyzer calls.
        ///
        /// </summary>
        /// <param name="field">Name of the field query will use.
        /// </param>
        /// <param name="termStr">Term token to use for building term for the query
        /// (<b>without</b> trailing '*' character!)
        ///
        /// </param>
        /// <returns> Resulting <see cref="Query" /> built for the term
        /// </returns>
        /// <exception cref="ParseException">throw in overridden method to disallow
        /// </exception>
        public /*protected internal*/ virtual Query GetPrefixQuery(System.String field, System.String termStr)
        {
            if (!allowLeadingWildcard && termStr.StartsWith("*"))
                throw new ParseException("'*' not allowed as first character in PrefixQuery");
            if (lowercaseExpandedTerms)
            {
                termStr = termStr.ToLower();
            }
-           Term t = new Term(field, termStr);
+         Term t = null;
+         TermQuery q = null;
+         try
+         {
+            q = GetFieldQuery(field, termStr) as TermQuery;
+         }
+         catch(Exception ex)
+         {
+         }

+         if (q != null)
+         {
+            t = new Term(field, q.GetTerm().text);
+         }
+         else
+         {
+            t = new Term(field, termStr);
+         }
            return NewPrefixQuery(t);
        }