Concepts → Miscellaneous System Variable
There is just one miscellaneous system variable:
|$user||string||The lowercase login name for the user||myadmin|
When you sign in to the Analytics Service, the Analytics Service creates a user session. A user session can contain session variables as well as other system variables. Most session variables are immutable once a value has been assigned. The
$user system variable is immutable as a user’s login name can not be modified.
$user system variable has some usage restrictions. For example, it is not possible to reference the
$user system variable in a formula expression for a physical schema table formula column.