Access SQL Query - INSERT Help!

Question

Hi,
I'm trying to do a simple INSERT statement in an Access Database.
My code is:
public SQLConnect() {
          // SQL Connection Part
          try {
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); //have tried with .newInstance() as well but same effect
               String filename = "C://Maxi//maxi.mdb";
               String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
               database += filename.trim() + ";DriverID=22;READONLY=true}";
               Connection con = DriverManager.getConnection(database, "", "");               
               PreparedStatement ps = con.prepareStatement("INSERT INTO Student (ID,FamilyName,FirstName,OtherName,Email,Phone,DOB,CourseType,Sex) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)");
               ps.setString(1, "071111114");
               ps.setString(2, "Crane");
               ps.setString(3, "Frasier");
               ps.setString(4, "Winslow");
               ps.setString(5, "[email protected]");
               ps.setString(6, "012345");
               ps.setString(7, "01/01/2008");
               ps.setString(8, "M");
               ps.setString(9, "M");
               ps.executeUpdate();
               //Statement t = con.createStatement();
               //t.execute("SELECT * FROM STUDENT");
               //con.close();
          } catch (Exception e) {
               System.out.println("ERROR!");
               e.printStackTrace();
     }I am experiencing weird behaviour with the INSERT command being carried out successfully.
The code as above will not INSERT the data in the PreparedStatement.
However if I use any of the two methods in the commented out code, the INSERT will be carried out. Why is this happening? Surely it should just INSERT the data with the line ps.executeUpdate() without having to wait for any further commands.
The reason I don't want to close the connection is that I am attempting to make a class so I can do simple INSERT, UPDATE and SELECT queries without having to go through the initial connection steps each time. I have read that opening and closing a connection for each query takes a lot of overhead, but it seems to be the only way this will properly execute.
I am welcome to any suggestions.
Cheers.

Answer 1

Ha it always seems to fix itself as soon as you post about it.
It would look as if when creating the connection if you do:
con.setAutoCommit(false);and then after the ps.executeUpdate(); if you commit with:
con.commit();this actually works.
If you omit to set the AutoCommit then this does not work. I am still stumped as to why I have to do this. Any explanations?
Edited by: adamuk on Mar 15, 2008 10:19 PM