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A user in Apex.
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Variable
APP_USER
Once a user has been identified, the Application Express engine keeps track of each user by setting the value of the variable APP_USER.
G_USER
From the APEX_APPLICATION package, the global variable G_USER specifies the currently logged in user.
Public
A public user is not authenticated. Ie if all users have the same rights and privileges, they are referred to as public users. See Oracle Apex - Public Navigation (Page and user)
DAD
With an authentication through the database access descriptor (DAD), when Oracle Apex - (Authentication|Identity) equals the value in the Public User field , the Application Express engine considers the current session to be a “public user” session.
From the APEX_APPLICATION package, the global variable G_PUBLIC_USER holds this value.
API
- Workspace parameter: USERNAME_VALIDATION