How to handle the exception when remote db is down

  • From: Sami Seerangan <dba.orcl@xxxxxxxxx>
  • To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
  • Date: Tue, 15 Feb 2005 20:47:09 -0500

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@testa 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: transaction or savepoint rollback required
ORA-06512: at "MY_USER.DB_LNK_TEST_PROC", line 8
ORA-02055: distributed update operation failed; rollback required
ORA-02068: following severe error from TESTA
ORA-03113: end-of-file on communication channel
ORA-06512: at line 1
 
Thanks
Sami
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