如何通过动态sql远程调用包里面的函数，并返回值

在分析测试库：edu@analysetest
①对要被调用的包适当授权给edu@analysetest
grant all on dbms_flashback to edu;

edu@edutest

②找出可用的db link
  select db_link from dba_db_links;
---------------
DB_LINK
-----------------
EDU_FX
EDU_CLONE
EDU_XXT
TEST_YFLORC
ORA_MYSQLTEST
EDU_XXTWEB
EDU_XXTHIS.XXT.CN
EDU_XXTBAK
EDU_NMDBC.XXT.CN
EDU_MYSQL
EDU_JL

DB_LINK
-----------------
EDU_FX
EDU_BLOGTEST
EDU_BLOG
CJ1
MMS_XXT
TEST.XXT.CN
EDU_CLONE

已选择18行。

③选择可以使用DB Link进行远程和本地执行:
SQL> select count(*)
  2  from organization@edu_fx;

  COUNT(*)
----------
     16509

④config@分析测试 edu测试库
  create table o_test(name varchar2(40));
  /
  insert into o_test
  values('涛涛不绝于耳@edu_test')

  create table o_test(name varchar2(40));
  /
  insert into o_test
  values('涛涛不绝于耳@analyse_test')
⑤测试：
  SQL> select count(*)
  2  from organization@edu_fx;

  COUNT(*)
----------
     16509

SQL> set serveroutput on
SQL> set feedback off
SQL> declare
  2    test_name organization.name%type;
  3    test_name1 organization.name%type;
  4  begin
  5    execute immediate
  6    'select o.name from o_test@edu_fx o' into test_name;
  7     dbms_output.put_line('测试名字 of remote:'||test_name);
  8     select o.name into test_name1 from o_test o;
  9     dbms_output.put_line('测试名字 of locald:'||test_name1);
10  end;
11  /
测试名字 of remote:涛涛不绝于耳@analyse_test
测试名字 of locald:涛涛不绝于耳@edu_test

⑥远程Package或Function调用也可以随之实现:
  SQL> declare
  2    r_scn number;
  3  begin
  4   execute immediate
  5   'select dbms_flashback.GET_SYSTEM_CHANGE_NUMBER@edu_fx from dual' into r_scn;
  6   dbms_output.put_line('scn of remote:'||r_scn);
  7  end;
  8  /
scn of remote:18865075287
--------------------附记第一步的授权很重要，囿于时间所限，先写这一点。

edit on 2010-07-31