执行存储过程ORA-01031: insufficient privileges解决

以下存储过程编译正常，其中的SQL语句在PLSQL执行也正常，但是在存储过程中执行即报告错误：ORA-01031: insufficient privileges。

create or replace procedure DBA_REBUILD_INDEX
As
Begin
execute   immediate  'alter index PK_DUBAI_STORAGE_OUT_MANIFEST  rebuild online';
execute   immediate  'alter index WATERGAUGE_PK  rebuild online';
Return;
end DBA_REBUILD_INDEX;

查找资料后发现，在存储过程中添加如下内容即可：Authid Current_User，修改后的存储过程结构如下
create or replace procedure DBA_REBUILD_INDEX  Authid Current_User
As
Begin
execute   immediate  'alter index PK_DUBAI_STORAGE_OUT_MANIFEST  rebuild online';
execute   immediate  'alter index WATERGAUGE_PK  rebuild online';
Return;
end DBA_REBUILD_INDEX;