Проверка структуры таблиц в табличном пространстве : Oracle

SET serveroutput ON
BEGIN
FOR c IN (SELECT owner,table_name FROM dba_tables WHERE tablespace_name='SYSTEM')
LOOP
BEGIN
EXECUTE IMMEDIATE
'analyze table '||c.owner||'.' || c.table_name || ' validate structure cascade';
EXCEPTION WHEN OTHERS THEN BEGIN
dbms_output.put_line(c.owner||'.' || c.table_name);
END;
END;
END LOOP;
END;
/