role_usage_grants
   The view role_usage_grants identifies
   USAGE privileges granted on various kinds of
   objects where the grantor or grantee is a currently enabled role.
   Further information can be found under
   usage_privileges.  The only effective difference
   between this view and usage_privileges is that
   this view omits objects that have been made accessible to the
   current user by way of a grant to PUBLIC.
  
Table 37.36. role_usage_grants Columns
| Name | Data Type | Description | 
|---|---|---|
| grantor | sql_identifier | The name of the role that granted the privilege | 
| grantee | sql_identifier | The name of the role that the privilege was granted to | 
| object_catalog | sql_identifier | Name of the database containing the object (always the current database) | 
| object_schema | sql_identifier | Name of the schema containing the object, if applicable, else an empty string | 
| object_name | sql_identifier | Name of the object | 
| object_type | character_data | COLLATIONorDOMAINorFOREIGN DATA WRAPPERorFOREIGN SERVERorSEQUENCE | 
| privilege_type | character_data | Always USAGE | 
| is_grantable | yes_or_no | YESif the privilege is grantable,NOif not |