Question

I want Username = Administrator and Password = admin, soon after table is created (or whenever table is recreate).

1. Is there any way to insert first row using following code. I do not want to use a separate insert query

2. Is there any constraint in Hibernate to restrict user from deleting (first) row

   @Entity
   @Table(name = "Users")
   public class Users implements Serializable {
   
       @Id
       @Column(name = "Username", unique = true, nullable = false)
       private String username;
   
       @Column(name = "Password", nullable = false)
       private String password;
   
       /**************** getter & setter ************/
   
   }
   

Answer 1

What you seem to be looking for is called fixtures. With Hibernate you can supply import.sql file on your classpath with your initial data (insert statements).

There’s a bit more information on the JBoss’ site.

The import.sql file is a simple text file with SQL statements, one line per statement:

insert into users (id, username) values (1, 'administrator');
insert into users (id, username) values (2, 'user');
...