Mysql PreparedStatement problem

Question

Hi
I am having trouble updating a database with PreparedStatement. I am using two place holders one of theme which is a String (descr) fails to update.
I am using
Connector/J 3.1.13 with mysql 1.4
here is my code
                    PreparedStatement pstmt = PrimaryConWrapper.getConnection().prepareStatement("INSERT INTO INVOICE_ENTRYES(i_id,descr,value,ts) VALUES("+id+",?,?,0)");
                    for(String eDescr:inve.keySet()){
                        pstmt.clearParameters();
                        int val = inve.get(eDescr);
                        pstmt.setString(1,eDescr);
                        pstmt.setInt(2,val);
                        int rts = pstmt.executeUpdate();
                        assert (rts==2):"In valid number of records updated "+rts;
                    }and I am getting an AssertionError
Exception in thread "main" java.lang.AssertionError: In valid number of records updated 1
and my daya base looks like this
mysql> SELECT * FROM INVOICE_ENTRYES;
+----+------+-------+------------+---------------------+
| id | i_id | descr | value      | ts                  |
+----+------+-------+------------+---------------------+
| 33 |   13 |       |   50396417 | 0000-00-00 00:00:00 |
| 34 |   13 |       | 1969358848 | 0000-00-00 00:00:00 |
| 35 |   13 |       | 1750080256 | 0000-00-00 00:00:00 |
| 36 |   13 |       | 1868762368 | 0000-00-00 00:00:00 |
+----+------+-------+------------+---------------------+

Answer 1

I cannot close the connection in my code because the connection is universal per login. How ever I tried you solution and I get this exception. I am not sure why this is but it could be because of the timestamp value.
            private int add(Invoice in)throws UnknownTypeException,DataSourceException,TypeMismatchException{
                Connection con = null;
                try{
                if(checkName(in))throw new TypeMismatchException("Invoice "+in.getName()+" already exists");
                    String name = in.getName();
                    String descr = in.getDescr();
                    Date date = in.getDate();
                    //invlice entry map
                    Map<String,Integer> inve = in.getEntries();
                    int spId = in.getParent().getId();
                    int jobId = in.getJobMeta().getId();
                    Statement stmt = PrimaryConWrapper.getConnection().createStatement(
                            ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_UPDATABLE);
                    stmt.executeUpdate("INSERT INTO INVOICES(dt,name,descr,sp_id,j_id,ts) VALUES('"+date+"','"+name+"','"+descr+"',"+spId+
                            ","+jobId+",0)",Statement.RETURN_GENERATED_KEYS);
                    ResultSet rs = stmt.getGeneratedKeys();
                    boolean chk = rs.next();
                    assert chk :"no keys returned";
                    int id = rs.getInt(1);
                    assert !rs.next():"morethan one key returned";
                    rs.close();
                    stmt.close();
                    con = PrimaryConWrapper.getConnection();
                    con.setAutoCommit(false);
                    PreparedStatement pstmt = PrimaryConWrapper.getConnection().prepareStatement("INSERT INTO INVOICE_ENTRYES(i_id,descr,value,ts) VALUES(?,?,?,?)");
                    for(String eDescr:inve.keySet()){
                        pstmt.clearParameters();
                        int val = inve.get(eDescr);
                        pstmt.setInt(1,id);
                        pstmt.setString(2,eDescr);
                        pstmt.setInt(3,val);
                        pstmt.setInt(4,0);
                        System.out.println(eDescr+","+val);
                        int rts = pstmt.executeUpdate();
                        assert (rts==1):"In valid number of records updated "+rts;
                    con.commit();
                    pstmt.close();
                    return id;
                catch(SQLException sqle){
                    try{if(con!=null)con.rollback();}catch(Exception e){}
                    throw new DataSourceException("could not add Invoice",sqle);
                finally{
                    try{if(con!=null)con.setAutoCommit(true);}catch(Exception e){}
            }and the exception is
Caused by: java.sql.SQLException: Incorrect arguments to mysql_stmt_execute