Question

To ensure the safty, do I need to write all the database accessing code like this:

public void updateOrder(OrderData order) throw Exception {
            ....
            coon.setAutoCommit(false);
            Statement stmt = conn.createStatement();
            String sql = "update order set .... where ";
            try {
                 stmt.executeUpdate(sql);
                 conn.commit();
            } catch (Exception e) {
                 conn.rollback();
            } finally {


        }

}

In this example, I have only access to one table, do I still need to treat it as transaction? Do I need to write all the database access as transaction like this?

Answer 1

That depends if there are multiple sql updates and inserts or not. If you are executing a single update or insert it will implicitly run within a transaction.