Spot the deliberate mistake ! Grand prize for the first correct answer .....

Question

Hi all,
I have been trying to get this piddly bit of code to work for a day now and I am out of cigarettes so.....
JAVA STORED PROCEDURE USING JDEVELOPER
======================================
The thing deploys ok. It is even executing from SQL*PLUS and I get a PL/SQL procedure successfully completed message. The problem is that it does not insert anything into the table. I have tried a commit after the exec in SQL*PLUS to no avail. Any suggestions ? It is the same for a DELETE statement.
I know I don't need the three variables but I am at the stage of hard-coding some values into it to get it to work.
Oh, and the prize is my UMIST cigarette lighter, a collectors item in a few hundred years, worth 10 pence at the moment.
Cheers.
package mypackage;
import java.sql.*;
import java.io.*;
public class testSelect {
public static void testSelect (int first, int second, int third)
throws Exception {
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@prams_nt_03:1521:gems", "rb199", "rb199");
String sql = "INSERT INTO test VALUES (1, 2, 3)";
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.executeUpdate();
pstmt.close();
catch(Exception m)
{ m.printStackTrace();}

Answer 1

Here's my guess.
The commit from sqlplus would commit changes make by the current Oracle session. However, when you use the server thin driver, you are creating another Oracle session to the prams_nt_03 db. In order to commit this correctly. I think you need to call con.commit(); after the pstmt.executeUpdate(); This will commit the change you just make in the thin created Oracle session.
In addition, it's odd that the thin connection doesn't do 'setAutoCommit to true' by default.
package mypackage;
import java.sql.*;
import java.io.*;
public class testSelect {
public static void testSelect (int first, int second, int third)
throws Exception {
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@prams_nt_03:1521:gems", "rb199", "rb199");
String sql = "INSERT INTO test VALUES (1, 2, 3)";
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.executeUpdate();
pstmt.close();
catch(Exception m)
{ m.printStackTrace();}