text: --+ holdcas on;
  -- create user by other dba and then drop it
  
  call login('dba','') on class db_user;
  
  create user USER1 password 'a' GROUPs dba;
  
  call login('USER1','a') on class db_user;
  
  
  create user USER2;
  
  call login('dba','') on class db_user;
  
  
  DROP USER USER1;
  DROP USER USER2;
  
  --+ holdcas off;
  