HAS_ROLE

Checks whether a Vertica user role is granted to the specified user or role, and returns true or false.

You can also query system tables ROLES, GRANTS, and USERS to obtain information on users and their role assignments. For details, see Viewing User Roles.

Behavior Type

Stable

Syntax

HAS_ROLE( [ 'grantee' ,] 'verify‑role' );

Parameters

`grantee`	Valid only for superusers, specifies the name of a user or role to look up. If this argument is omitted, the function uses the current user name (`CURRENT_USER`). If you specify a role, Vertica checks whether this role is granted to the role specified in verify‑role. If a non-superuser supplies this argument, Vertica returns an error.
`verify‑role`	Name of the role to verify for grantee.

Privileges

None

Examples

In the following example, a dbadmin user checks whether user MikeL is assigned the admnistrator role:

=> \c
You are now connected as user "dbadmin".
=> SELECT HAS_ROLE('MikeL', 'administrator');
 HAS_ROLE
----------
 t
(1 row)

User MikeL checks whether he has the regional_manager role:

=> \c - MikeL
You are now connected as user "MikeL".
=> SELECT HAS_ROLE('regional_manager');
 HAS_ROLE
----------
 f
(1 row)

The dbadmin grants the regional_manager role to the administrator role. On checking again, MikeL verifies that he now has the regional_manager role:

dbadmin=> \c
You are now connected as user "dbadmin".
dbadmin=> GRANT regional_manager to administrator;
GRANT ROLE
dbadmin=> \c - MikeL
You are now connected as user "MikeL".
dbadmin=> SELECT HAS_ROLE('regional_manager');
 HAS_ROLE
----------
 t
(1 row)