Deleting Record from DB using Hibernate

Approach 2:

 Create the POJO class object and supply the primary key value. Mark the POJO class object as to be deleting by calling the delete method.

Ex:

public class DeleteRecords1{

public static void main(String[] args){

Configuration cfg = new Configuration();

cfg.configure();

SessionFactory sf = cfg.buildSessionFactory();

Session hsession = sf.openSession();

Product p = new Product();

p.setpid(11);

hsession.delete(p);

tx.commit();

hsession.close();

           }

}

In this approach when we call the delete method object is marked as to be deleted. When we call the commit() method it has perform the following 3 steps.

Step 1: It check weather primary key value is available in the supplied object or not. If not available it will not carry out any work.

Step 2: If the primary key value is available a select query will be send to database server to check weather record is available or not.

Step 3: If the record is available in DB hibernate send the delete query. If the record is not available hibernate will not do any work.