Statement.executeUpdate() modifies DB despite disabled autocommit mode

Question

Hi
I've got problem with transactions in JDBS. That's an example code:
    // (...) static public void main(String[] args) throws Exception     {         Class.forName("com.mysql.jdbc.Driver");         String url = "jdbc:mysql://127.0.0.1:3306/JAVADB";                Connection con = DriverManager.getConnection(url,"xxx","yyy");             con.setAutoCommit(false);         Statement stmt = con.createStatement();                stmt.executeUpdate("UPDATE CARS SET power=30");         con.rollback();         con.commit();         stmt.close();         con.close();     } // (...)
In my opinion this code shouldn't modify table CARS in database, because I initially disable autocommit mode, and then i cancel all updates made in transaction by invoking rollback() function, but it modifies. When I delete con.rollback() line and con.commit() line the result is the same - database is modified despite not invoking commit() function. As You can see, i use mysql's driver on Debian ( if it matters ).
Edited by: Guest111 on Aug 26, 2010 3:44 AM
Edited by: Guest111 on Aug 26, 2010 4:09 AM

Answer 1

You haven't enabled transactions on this table in MySQL. Not really Java's problem.