CREATE TABLE machine (
        id INTEGER NOT NULL, 
        parent_id INTEGER, 
        notebook_id INTEGER, 
        created_user_id INTEGER, 
        modified_user_id INTEGER, 
        uniq_key VARCHAR(36) NOT NULL, 
        name VARCHAR(256) NOT NULL, 
        attribute SMALLINT NOT NULL, 
        hypervisor SMALLINT NOT NULL, 
        hostname VARCHAR(256), 
        icon VARCHAR(256), 
        is_deleted BOOLEAN, 
        created TIMESTAMP, 
        modified TIMESTAMP, 
        PRIMARY KEY (id), 
         FOREIGN KEY(parent_id) REFERENCES machine (id), 
         FOREIGN KEY(created_user_id) REFERENCES user (id), 
         FOREIGN KEY(modified_user_id) REFERENCES user (id), 
         UNIQUE (hostname), 
         UNIQUE (uniq_key), 
         FOREIGN KEY(notebook_id) REFERENCES notebook (id)
);