ASCII码26 在以字符方式读取文件是产生的问题

通过oracle普通用户想打开set auotrace功能发现报如下错误
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled

SP2-0611: Error enabling STATISTICS report

SQL> conn scott/tiger
Connected.
SQL> set autotrace on;
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report
连接在sys用户下发现没有这个角色
SQL> conn / as sysdba
Connected.
SQL> grant pustrace to scott;
ERROR at line 1:

ORA-01919: role 'PUSTRACE' does not exist

通过执行下以脚本创建此角色
SQL> @?/sqlplus/admin/plustrce.sql
SQL>
SQL> drop role plustrace;
drop role plustrace
*
ERROR at line 1:
ORA-01919: role 'PLUSTRACE' does not exist

SQL> create role plustrace;

Role created.

SQL>
SQL> grant select on v_$sesstat to plustrace;

Grant succeeded.

SQL> grant select on v_$statname to plustrace;

Grant succeeded.

SQL> grant select on v_$mystat to plustrace;

Grant succeeded.

SQL> grant plustrace to dba with admin option;

Grant succeeded.

现在就可以在将plustrace角色赋予给其他用户了