PreparedStatement.setString doesn't work with Oracle 10g.

Question

Hi all,
I newbie question regarding the method setString of class java.sql.PreparedStatement. My process require to pass throught a file and check agaisnt a Oracle table if the product id of the given record exist in the table .
I use the SQL
select matnr from zncorart_ap where zartleg = ? and zentrleg = ?
to do that. When i try to replace the ? with the setString method it doesn't work and the query always return no row as ? is not a valid value.
Thx for your help.
// Here code snippet of the caller class
public class Inventory2SAP {
private ETLSQL productXRef;
private ResultSet productXRefResult;
private String inRecord;
private String prdCat;
protected void acquireResource() {
  try {       
//  Instantiate product XRef object.
    productXRef = new ETLSQL();
    productXRef.loadDriver(ch.getProperties("Inventory2SAP.JDBCDriver"));
    productXRef.connectDB(true);
    prdXRefLookup = "select matnr from zncorart_ap where zartleg = ? and zentrleg = ?";
    productXRef.createPrepared(prdXRefLookup);
  catch (SQLException sqle) {
    sqle.printStackTrace();
    System.exit(-1);            
// Loop this method until EOF        
protected boolean transform() {
   try {
      productXRef.setString(1, inRecord.substring(0, 8));
      productXRef.setString(2, prdCat);       
      productXRefResult = productXRef.executePrepared();
      if (productXRefResult.next()) {
         System.out.println("Nerver branch here because setString doesn't work");
      else {
         System.out.println("Always row not found");
   catch (SQLException sqle) {
      sqle.printStackTrace();
      System.exit(-1);
protected void releaseResource() {
   try {
      productXRef.disconnectDB();
   catch (SQLException sqle) {
      sqle.printStackTrace();
      System.exit(-1);
public class ETLSQL {
    private static Connection con;
    private PreparedStatement pstm;
    private ResultSet rs;
    protected ETLSQL() {
    protected void loadDriver(String driverID) {
       try {
          if (driverID.equals("oracle")) {
             Class.forName(ch.getProperties("OracleDriver")).newInstance();
       catch(ClassNotFoundException cnfe) {
          cnfe.printStackTrace();
          System.exit(-1);                  
      catch (InstantiationException ie) {
         ie.printStackTrace();
         System.exit(-1);  
      catch (IllegalAccessException iae) {
          iae.printStackTrace();
         System.exit(-1);               
protected void connectDB(boolean isReadOnly) throws SQLException {
   if (driverID.equals("oracle")) {
      con = DriverManager.getConnection(ch.getProperties("OracleURL"),
      ch.getProperties("OracleUser"), ch.getProperties("OraclePassword"));         
    else {
       System.out.println("Can't connect to the Database");
       System.exit(-1);                
protected void createPrepared(String SQLString) throws SQLException {
   pstm = con.prepareStatement(SQLString);
protected void setString(int pos, String s) throws SQLException {
   pstm.setString(pos, s);
protected ResultSet executePrepared() throws SQLException {
   rs  = pstm.executeQuery();
   return rs;
protected void disconnectDB() throws SQLException {
   if (pstm != null) {
      pstm.close();     
   if (!con.isClosed()) {
      con.close();
}

Answer 1

Ever solve this problem? Seems I'm having the same problem. I'm at a bit of a loss.
**** Specifically, I get this
Jan 23, 2007 12:49:51 PM test.JdbcTestHarness doItGood
INFO: ======= doItGood =======
Jan 23, 2007 12:49:52 PM test.JdbcTestHarness doItGood
INFO: It worked...my name is mvalerio
Jan 23, 2007 12:49:52 PM test.JdbcTestHarness doItBad
INFO: ======= doItBad =======
Jan 23, 2007 12:49:52 PM test.JdbcTestHarness doItBad
INFO: It didn't work my name is mud
**** When I do this
package test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
public class JdbcTestHarness {
     private Logger logger = null;
     * @param args
     public static void main(String[] args) {
          JdbcTestHarness jdbcTest = new JdbcTestHarness();
          jdbcTest.doItGood();
          jdbcTest.doItBad();
     public JdbcTestHarness() {
          this.logger = Logger.getLogger("test");
     public void doItGood() {
          logger.log(Level.INFO, "======= doItGood =======");
          Connection conn = null;
          PreparedStatement stmt = null;
          ResultSet rs = null;
          try {
               Class.forName("oracle.jdbc.driver.OracleDriver");
               conn = DriverManager.getConnection(
                         "jdbc:oracle:thin:@db1-dev.lis.state.oh.us:2521:test",
                         "dir", "dir");
               stmt = conn
                         .prepareStatement("select username,password,'true' from account where account.username = 'mvalerio'");
               rs = stmt.executeQuery();
               if (rs.next()) {
                    this.logger.log(Level.INFO, "It worked...my name is "
                              + rs.getString(1));
               } else {
                    this.logger.log(Level.INFO, "It didn't work my name is mud");
          } catch (ClassNotFoundException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (SQLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } finally {
               if (conn != null) {
                    try {
                         conn.close();
                    } catch (SQLException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
     public void doItBad() {
          logger.log(Level.INFO, "======= doItBad =======");
          Connection conn = null;
          PreparedStatement stmt = null;
          ResultSet rs = null;
          try {
               Class.forName("oracle.jdbc.driver.OracleDriver");
               conn = DriverManager.getConnection(
                         "jdbc:oracle:thin:@db1-dev.lis.state.oh.us:2521:test",
                         "dir", "dir");
               stmt = conn
                         .prepareStatement("select username,password from account where account.username = ? ");
               stmt.setString(1, "mvalerio");
               rs = stmt.executeQuery();
               if (rs.next()) {
                    this.logger.log(Level.INFO, "It worked...my name is "
                              + rs.getString(1));
               } else {
                    this.logger.log(Level.INFO, "It didn't work my name is mud");
          } catch (ClassNotFoundException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (SQLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } finally {
               if (conn != null) {
                    try {
                         conn.close();
                    } catch (SQLException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
Any help would be appriciated.......