SQL> create table Z_TRUNCATE_T(ID number);
Table created.
SQL> insert into Z_TRUNCATE_T select 1 from dual;
1 row created.
SQL> commit;
Commit complete.
SQL> select * from Z_TRUNCATE_T;
  ID
----------
   1
SQL>

SQL> grant drop any table to dwetl;
Grant succeeded.
SQL> 
SQL> grant select,insert,delete,update on Z_TRUNCATE_T to dwetl;
Grant succeeded.
SQL>

SQL> revoke drop any table from dwetl;
Revoke succeeded.
SQL> revoke select,insert,delete,update on shop.PLAN6_TEMPLET_NODE_EDIT from dwetl;
Revoke succeeded.
SQL>

create or replace procedure p_truncate as 
  begin
  execute immediate 'truncate table Z_TRUNCATE_T';
  end;

SQL> 
 create or replace procedure p_truncate as 
begin
execute immediate 'truncate table Z_TRUNCATE_T';
 4 end;
 5 /
Procedure created.
SQL>

SQL> grant execute on p_truncate to dwetl;
Grant succeeded.
SQL> 
SQL> grant select,insert,delete,update on Z_TRUNCATE_T to dwetl;
Grant succeeded.
SQL>

SQL> call shop.p_truncate();
Call completed.
SQL> select * from shop.Z_TRUNCATE_T;
no rows selected
SQL>