Oracle sql tuning advisor

DECLARE
my_task_name VARCHAR2(30);
BEGIN
 my_task_name := DBMS_SQLTUNE.CREATE_TUNING_TASK(
 sql_id => '&1',
 scope => 'COMPREHENSIVE',
 time_limit => 3600,
 task_name => '&2-&1',
 description => 'processo &2 &1');
end;
/

BEGIN
 DBMS_SQLTUNE.EXECUTE_TUNING_TASK( task_name => '&2-&1');
end;
/

set long 10000000
set longchunksize 1000
set linesize 200
set pagesize 400
set trim on
set trims on
set autotrace off

spool &2-&1..txt
SELECT DBMS_SQLTUNE.REPORT_TUNING_TASK( '&2-&1') from DUAL;
spool off

spool &2-&1..long.txt
SELECT DBMS_SQLTUNE.REPORT_TUNING_TASK( '&2-&1','TEXT','ALL','ALL') from DUAL;
spool off