Statement.RETURN_GENERATED_KEYS in PreparedStatement

Question

Hi everyone,
I need to insert a new record to a table in Mysql DB (using JDBC driver). After inserting is successful, I want to get the new ID number (it is a Primary key). Now I have problem using 'Statement.RETURN_GENERATED_KEYS' in PreparedStatement.
Here is the code:
    public void create(Item item)
    throws SQLException, InvalidFieldException {
          String creatSql = "INSERT INTO sc_item (catID, itemName, inStock, itemDesc, "+
              "imageName, salePrice, lastUpdateDate  ) values (?, ?, ?, ?, ?, ?, NOW())";
        PreparedStatement insert = conn.prepareStatement(creatSql,
            Statement.RETURN_GENERATED_KEYS);
        try {
            populateAdd(insert, item);
            insert.executeUpdate();
            ResultSet key = insert.getGeneratedKeys();
            if (!key.next()) {
                throw new RuntimeException(
                    "Can't retrieve generated primary key!");
            item.setItemId(key.getLong(1));
            key.close();
        } catch (SQLException e) {
            if (InvalidFieldException.SQL_STATE.equals(e.getSQLState())) {
                throw new InvalidFieldException(e);
            } else {
                throw e;
        } finally {
            insert.close();
    private void populateAdd(PreparedStatement stmt, Item item)
    throws SQLException {
        stmt.setInt(1, 1);
        stmt.setString(2, item.getItemName());
        stmt.setInt(3, item.getInStockNum());
        stmt.setString(4, item.getItemDesc());
        stmt.setString(5, item.getItemImgName());
        stmt.setDouble(6, item.getSalePrice());
    }in this line:
PreparedStatement insert = conn.prepareStatement(creatSql,
Statement.RETURN_GENERATED_KEYS);
If I don't use 'Statement.RETURN_GENERATED_KEYS', inserting is successful, no problem at all (I have tested it, also I use similar statement in the code of table update).
Does anyone know what causes the problem?
(I have 'mysql-connector-java-3.1.10-bin.jar' in /WEB-INF/classes/lib folder, my project runs on Tomcat 5.5)
Thanks in advance

Answer 1

This seems to be a bug in the mysql driver. Here is a link to the bug (#13668):
http://bugs.mysql.com/bug.php?id=13668