How to handle the exception when remote db is down 2005-02-16 - By Mercadante, Thomas F
Sami,
The problem is that Oracle is still holding the update to the remote
database open. Try the following:
1 create or replace procedure db_lnk_test_proc(i_p1 number)
2 as
3 begin
4 insert into db_lnk_test values(i_p1,'From a1 db',sysdate);
Commit; <========== This makes sure your first insert works
5 begin
6 insert into db_lnk_test@(protected) values(i_p1,'From a1 db',sysdate);
7 exception when others then
Rollback; <===== Rollback the remote transactions
8 insert into db_lnk_test_Q values(i_p1,'From a1 db',sysdate); --
If the remote db is down insert into QUEUE table
9 end;
10 commit;
11* end;
You could also look at using savepoints. Nick had a good idea also about
looking at Advanced Queueing.
Tom
-- --Original Message-- --
From: Sami Seerangan [mailto:dba.orcl@(protected)]
Sent: Tuesday, February 15, 2005 8:47 PM
To: oracle-l@(protected)
Subject: How to handle the exception when remote db is down
Hi All,
I am trying to do DML activity on both local and remore DB. If the
remote db is down, I need to insert the values into temporary table on
the local db so that later when the remore db becomes available I can
push the records.
This is what I did but don't know how to handle the exception when
remote db is down.
SQL> desc db_lnk_test
Name Null? Type
-- ---- ---- ---- ---- ---- ---- ---- --- -- -----
-- ---- ---- ---- ---- -----
C1 NUMBER
C2 VARCHAR2(100)
C3 DATE
SQL> desc db_lnk_test_Q
Name Null? Type
-- ---- ---- ---- ---- ---- ---- ---- --- -- -----
-- ---- ---- ---- ---- -----
C1 NUMBER
C2 VARCHAR2(100)
C3 DATE
SQL> create database link testa connect to MY_USER identified by
temp_123 using 'testa';
Database link created.
SQL> get p1
1 create or replace procedure db_lnk_test_proc(i_p1 number)
2 as
3 begin
4 insert into db_lnk_test values(i_p1,'From a1 db',sysdate);
5 begin
6 insert into db_lnk_test@(protected) values(i_p1,'From a1 db',sysdate);
7 exception when others then
8 insert into db_lnk_test_Q values(i_p1,'From a1 db',sysdate); --
If the remote db is down insert into QUEUE table
9 end;
10 commit;
11* end;
SQL>
SQL> exec db_lnk_test_proc(1);
PL/SQL procedure successfully completed.
SQL> exec db_lnk_test_proc(5);
BEGIN db_lnk_test_proc(5); END;
*
ERROR at line 1:
ORA-02067 (See ORA-02067.ora-code.com): transaction or savepoint rollback required
ORA-06512 (See ORA-06512.ora-code.com): at "MY_USER.DB_LNK_TEST_PROC", line 8
ORA-02055 (See ORA-02055.ora-code.com): distributed update operation failed; rollback required
ORA-02068 (See ORA-02068.ora-code.com): following severe error from TESTA
ORA-03113 (See ORA-03113.ora-code.com): end-of-file on communication channel
ORA-06512 (See ORA-06512.ora-code.com): at line 1
Thanks
Sami
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