About Session State and Security

Oracle Application Express persists session state in database tables. Session state is preserved in database tables because it is more secure to store the session state on the server side than on the client. Because Oracle Application Express applications use the stateless HTTP protocol, an application's session state across multiple page views is preserved in database tables. Not maintaining a synchronous database connection for each Oracle Application Express application user significantly lessens memory and database resource requirements.

Developers can query the session state stored by Oracle Application Express applications using the Application Builder and built-in monitoring pages. Developers and administrators can access session state for any application in the workspace to which they are authenticated.

A few best practices for developers include:

• As a standard part of implementing program control flow, clear the session state of unneeded values using clear-cache page processes or clear-cache directives in URLs used to navigate to pages.

• Use password page item types that do not save state. This prevents the entered passwords from being saved in session state tables in the database.

• When sensitive data must persist in a session, it should be saved in Oracle Application Express session state tables in encrypted form. To use this feature, set the page item's Store value encrypted in session state attribute to Yes. Encrypted stored values are automatically decrypted when read.