dbforge->add_field(array( 'id' => array( 'type' => 'VARCHAR', 'constraint' => '40', ), 'ip_address' => array( 'type' => 'VARCHAR', 'constraint' => '45', ), 'timestamp' => array( 'type' => 'INT', 'constraint' => '10', 'unsigned' => TRUE, 'default' => '0' ), 'data' => array( 'type' => 'BLOB', ), )); $this->dbforge->add_key('id', TRUE); $this->dbforge->create_table('sessions'); } public function down() { $this->dbforge->drop_table('sessions'); } }