Database Link and error ORA-02019

Question

Oracle 9.2.0.6 on Windows 2003
Has anybody encountered this before and been able to resolve.
SQL> connect SchemaA/password@NSN1
SQL> create database link MyLink1
2 connect to REMDB identified okm135
3 using 'STAF'
4 /
Database link created.
SQL> create or replace VIEW rem_mydocs as
2 (select * from mydocs@MyLink1)
3 /
View created.
SQL> grant select on rem_mydocs to UserA ;
Grant succeeded
SQL> Create or replace function fn_rem_mydocs
2 return Sys_RefCursor
3 IS
4 v_rc Sys_RefCursor;
5 begin
6  open v_rc for
7       select * from rem_mydocs ;
8  return (v_rc);
9 end;
10 /
Function created.
SQL> grant execute on fn_rem_mydocs to UserA;
Grant succeeded
SQL> connect UserA/test975@NSN1
Connected.
SQL> create or replace synonym rem_mydocs for SchemaA.rem_mydocs;
Synonym created.
SQL> create or replace synonym fn_rem_mydocs for SchemaA.sp_rem_mydocs ;
Synonym created.
SQL> select count(*) from rem_mydocs ;
COUNT(*)
      324
SQL> var g_ref refcursor
SQL> begin :g_ref := fn_rem_mydocs; end;
2 /
SQL> print g_ref
ERROR:
ORA-02019: connection description for remote database not found                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Answer 1

Metalink Note:262881.1
The information in this article applies to:
Oracle Server - Enterprise Edition - Version: 8.0.x to 9.2.0.x
This problem can occur on any platform.
Errors
ORA 2019 connection description for
Symptoms
Describe on a Synonym which is based on a database link may issue error:
ORA-2019 connection description for remote database not found
Select from the synonym works successfully.
Cause
Based on the Bug 3071468 this issue happens when the local
and the remote database have different domain name in the GLOBAL_NAME.
For example if:
select * from global_name;
gives from local database:
PROD.UK.ORACLE.COM
and the remote database has:
TEST.US.ORACLE.COM
then we have different domains for the global_name.
This does not reproduce when the domain is the same for both global_names.
Fix
This issue is fixed in 10.1.0.2.
For previous versions we have the following 2 workarounds:
1. Use View in the place of the synonym. This works.
2. Alter one of the databases global_name , so that the 2 global_names to have the same domain.
For example in the above example chenge the TEST database as:
sql> alter database rename global_name to test.uk.oracle.com;
Then you would have to drop and recreate the database link.
References
Bug 3071468 - Ora-2019 May Occur When Describing An Synonym Using A Database Link
Regards,
Reza
Message was edited by:
Reza