Merged in 2.1-stable changes.
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index 271a70e..6352c73 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -1424,7 +1424,23 @@
 
 		return $item.$alias;
 	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Dummy method that allows Active Record class to be disabled
+	 *
+	 * This function is used extensively by every db driver.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	protected function _reset_select()
+	{
+	
+	}
+
 }
 
 /* End of file DB_driver.php */
-/* Location: ./system/database/DB_driver.php */
+/* Location: ./system/database/DB_driver.php */
\ No newline at end of file