Made database parent classes and methods abstract
diff --git a/system/database/DB_active_rec.php b/system/database/DB_active_rec.php
index 35164a7..89369f1 100644
--- a/system/database/DB_active_rec.php
+++ b/system/database/DB_active_rec.php
@@ -38,7 +38,7 @@
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
-class CI_DB_active_record extends CI_DB_driver {
+abstract class CI_DB_active_record extends CI_DB_driver {
protected $return_delete_sql = FALSE;
protected $reset_delete_data = FALSE;
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index bcff433..79b7285 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -38,7 +38,7 @@
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
-class CI_DB_driver {
+abstract class CI_DB_driver {
public $dsn;
public $username;
@@ -1357,9 +1357,7 @@
*
* @return void
*/
- protected function _reset_select()
- {
- }
+ abstract protected function _reset_select();
}