Question about user_sys_privs

 I have a customer who is granting priveleges to a schema.  He then queries user_sys_privs but the table is blank and the schema has no priveleges still.  Shouldn't the priveleges show up in user_sys_privs ?

SQL> grant select any table to am_agent;

Grant succeeded.

SQL> select * from user_sys_privs where username = 'AM_AGENT';

no rows selected

SQL> show user
USER is "SYSTEM"