如何通過DB link進行遠程過程或函數調用

2024-07-21 02:32:53

字體：大中小

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有朋友在留言板問:如何通過動態sql遠程調用包里面的函數，并返回值。我簡單做了一個例子，實現以上要求.
首先進行適當授權：

[Oracle@jumper oracle]$ sqlplus "/ as sysdba" SQL*Plus: Release 9.2.0.4.0 - PRodUCtion on Tue Nov 7 21:07:56 2006Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning option
JServer Release 9.2.0.4.0 - ProductionSQL> grant create public database link to eygle;Grant succeeded.
SQL> grant all on dbms_Flashback to eygle;Grant succeeded.

建立DB Link:

SQL> connect eygle/eygle
Connected.
SQL> create public database link hsbill using 'hsbill'; Database link created.SQL> select db_link from dba_db_links;DB_LINK
---------------------------------------------------
HSBILLSQL> select * from dual@hsbill;D
-
X

此后可以嘗試使用DB Link進行遠程和本地執行:SQL> set serveroutput on
SQL> set feedback off
SQL> declare
2 r_gname varchar2(40);
3 l_gname varchar2(40);
4 begin
5 execute immediate
6 'select GLOBAL_NAME from global_name@hsbill' into r_gname;
7 dbms_output.put_line('gname of remote:'r_gname);
8 select GLOBAL_NAME into l_gname from global_name;
9 dbms_output.put_line('gname of locald:'l_gname);
10 end;
11 /
gname of remote:HSBILL.HURRAY.COM.CN
gname of locald:EYGLE遠程Package或Function調用也可以隨之實現:SQL> declare
2 r_scn number;
3 l_scn number;
4 begin
5 execute immediate
6 'select dbms_flashback.GET_SYSTEM_CHANGE_NUMBER@hsbill from dual' into r_scn;
7 dbms_output.put_line('scn of remote:'r_scn);
8 end;
9 /
scn of remote:18992092687SQL> -The End-

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