Another problem: query in oracle

Question

Hello guys,
I have a problem in a SQL code in a program that uses a Oracle connection.
The code:
public class ConBol {
     public void getDataBol() {
          String sql = "SELECT * FROM DOCUMENT_FISC  WHERE NRDOC_FISC = ?";
          try {
               Connection conn = new ConnectionFactory().getConnection();
               PreparedStatement stmt = conn.prepareStatement(sql);
               stmt.setInt(1, 3969);
               ResultSet rs = stmt.executeQuery();
               System.out.println("here -- ");
               while (rs.next()) {
                    System.out.println("---while--- ");
                    System.out.println(rs.getString(1));
               rs.close();
               stmt.close();
               try {
                    conn.close();
               } catch (SQLException ex) {
                    Logger.getLogger(ConBol.class.getName()).log(Level.SEVERE, null, ex);
          } catch (SQLException ex) {
               Logger.getLogger(ConBol.class.getName()).log(Level.SEVERE, null, ex);
}When my SQL is only "Select * from myTable", the resultSet get all the data and the "System.out" inside the "while", works, showing me the data.
When I put a "where" on my SQL, the resultSet returns nothing, and the column that I ask, has items inside and the query should return me at least one row.
I really don't know what more can I do to solve this problem.
The server is Oracle 11g.
I try in Windows 7 and Windows XP SP3.
I try to use 3 diferent oracle drivers: ojdbc6.jar , ojdbc14.jar and class12.jar.
I try Eclipse and Netbeans, PreparedStatement and Statement, table name and column name in uppercase and lowercase, with alias, with other users from DB and no one solve the problem.
The data base connection is ok. When I copy and paste the SQL on the SQLDeveloper, the query works fine and show me results.
The program don't give any errors or exceptions, but doesn't work when I have a "where something".
If I put "where 1=1" he works fine.
Any help??

Answer 1

Artur,
I make the tests that you ask me to do and it works!!!
The value returned from the "select distinct" work when I put him on the original query.
I just can't understand how can this work if the another value that I pass to the query exists in the table too.
How can one value that exists, don't return me nothing?
At least, now I can be sure that the code is alright.
Thank's a lot friend, for you and JSchell. I will make more tests to try understand how this can happen.
Edit: I try to count the rows of that table. In PLSQL Developer, the row count was 5860. In the java code was 4730.
Can be out of memory in the resultSet?
Edited by: Herick on Dec 29, 2009 2:34 AM
Edit2: Forget what I said. I use the "Select count" and the resultSet came with just one result, so can't be memory problem.
Edited by: Herick on Dec 29, 2009 2:39 AM