51.9. pg_auth_members
  The catalog
  
   pg_auth_members
  
  shows the membership
   relations between roles.  Any non-circular set of relationships is allowed.
 
  Because user identities are cluster-wide,
  
   pg_auth_members
  
  is shared across all databases of a cluster: there is only one
   copy of
  
   pg_auth_members
  
  per cluster, not
   one per database.
 
   
    Table 51.9. 
    
     pg_auth_members
    
    Columns
   
  
| Name | Type | References | Description | 
|---|---|---|---|
| 
        roleid
        | 
        oid
        | 
        
          | ID of a role that has a member | 
| 
        member
        | 
        oid
        | 
        
          | ID of a role that is a member of 
        roleid
        | 
| 
        grantor
        | 
        oid
        | 
        
          | ID of the role that granted this membership | 
| 
        admin_option
        | 
        bool
        | True if 
        member
       can grant membership in
        roleid
       to others |