ORA-04054 : using variable substitution for the database link name

Question

Hi,
I need to use variable substitution for the database link name.
Here is my command :
declare
GET VARCHAR2(50);
begin
select OIA_GET_DESIGNATION into GET from INFODRI.OMA_IN_ARTICLES;
for rec in (select * from [email protected]_GET_DESIGNATION)
LOOP
dbms_output.put_line('TEN_CODE vaut : '||rec.ten_code);
END LOOP;
exception
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE('ERREUR ORACLE DETECTEE : '||rec.OIR_CUR);
DBMS_OUTPUT.PUT_LINE('Message Erreur : '||SUBSTR(SQLERRM,1,245));
:crd := -1;
end;
When I run this programm, I receive the error :
ORA-04054: database link REC.OIA_GET_DESIGNATION does not exist
When I replace :
for rec in (select * from [email protected]_GET_DESIGNATION)
by :
for rec in (execute immediate 'select * from tensions@'||rec.OIA_GET_DESIGNATION)
I receive the error :
PLS-00103 : Encountered the symbol "IMMEDIATE" while parsing.
What can I do to resolv my problem ?
Regards,
Rachel

Answer 1

What is the name of the DB Link and the name of the object you are selecting
from?
I find it easier to create a view on the remote object then use that in selects.
e.g,
Link Name = MyLink
Object_name = Addr_Loc
create or replace VIEW Rem_Addr_Loc AS
select * from addr_loc@mylink;
In the code I then use the view
begin
  for C_Rec in (select * from Rem_Addr_loc)
  loop
     dbms_output.put_line('Rec: '|| C_Rec.Col1);
  end loop;
end;