Hello,

I am wondering if it is possible to achieve a thing like this "natively" with Hibernate.

Let's say that I create a new project, create a database schema classes with Hibernate, and then run script "sync_database" that creates all the tables in the database.
That is doable as I have seen in the docs.

But, the next step. Then, I decide to change the schema, and add some fields to the classes or do other things.
So I change the classes, and then run the script again to delete old columns, add new and so on...

Is this possible natively? Or at all? I know that it is quite problematic with constraints.. but not impossible though to achieve that.

You can have hibernate create your schema each time you start your sessionFactory (i.e when you start your app) and drop it when it's finished.

use config property "hibernate.hbm2ddl.auto=create-drop" for this.

This will do what you wanted, but for obvious reasons your data will be lost between application restarts :S

So... It will not do what I have written about.
You did not understand the idea then ;)