[ecfisa]

Hola Irwin.

Revisa este enlace: How to get a list of roles granted to a user?

Una variación del código del enlace:

Código SQL [-]
SELECT RDB$USER AS USER_NAME,
       RDB$GRANTOR AS GRANTOR_NAME,
       (CASE RDB$PRIVILEGE
        WHEN 'S' THEN 'SELECT'
        WHEN 'U' THEN 'UPDATE'
        WHEN 'D' THEN 'DELETE'
        WHEN 'I' THEN 'INSERT'
        WHEN 'R' THEN 'REFERENCE'
        WHEN 'X' THEN 'EXECUTE' END) AS PRIVILEGE,
        RDB$GRANT_OPTION AS GRANT_OPTION,
        RDB$RELATION_NAME AS TABLE_NAME,
        RDB$FIELD_NAME AS FIELD_NAME,
        RDB$USER_TYPE AS USER_TYPE,
        RDB$OBJECT_TYPE AS OBJECT_TYPE
FROM RDB$USER_PRIVILEGES
WHERE RDB$USER = :USER_NAME /* parámetro nombre del usuario */
ORDER BY RDB$USER, RDB$RELATION_NAME

Saludos