触发器怎么调用外部程序，分不够可加

Question

dbms_pipe往随便一个程序发消息，另一个程序执行。

Answer 1

在触发器中是否可以写类似 "shutdown "的语句呢?

Answer 2

没有尝试过，不过觉得触发器中应该没有权限执行shutdown immediate这类的语句

Answer 3

帮忙看看,编译都通过,触发器也有效,但看不到执行效果:
CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED RunDx AS
import java.io.*;                                                               
public class RunDx{                                                         
  public static String Run(){                                     
     try{                 
System.out.println("success");
Runtime.getRuntime().exec("D:");　
Runtime.getRuntime().exec("cd D:\mulu");　   
Runtime.getRuntime().exec("shutdown.bat");//要执行的批处理文件，实现关闭的功能　　        
        return("0");                                                                  
     }                                                                          
     catch (Exception e){                                                       
        System.out.println("Error running command: \n" + e.getMessage());    
        return(e.getMessage());  
     }                                                                          
  }                                                                             
}
/create or replace procedure RunDx　　
as language java　　
name 'RunDx.Run()';
/
set serveroutput on size 5000
call dbms_java.set_output(5000);
exec RunDx ;