DBLINK Name problem????

Question

I create a DBLINK called "MYDBLINK" but ORACLE rename it as "MYDBLINK.ES.AULAS-GRP"
I create it:
create database link MYDBLINK
connect to USER1
identified by "USER1"
using '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (Host = AUPDMANAS53525.ES.AULAS-GRP) (PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = BDED1.es.aulas-grp)))';
I need the name “MYDBLINK” instead of "MYDBLINK.ES.AULAS-GRP"
I have executed ALTER SYSTEM SET DB_DOMAIN='' scope=spfile; instruction but I continue with the same problem….
What do I have to configure?
I attach tnsnames and some data.
Thanks very much in advance!
TNSNAMES:
BDED1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = AUPDMANAS53525.ES.AULAS-GRP)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = BDED1.es.aulas-grp)
(SRVR = DEDICATED)
SQL> show parameter service;
NAME TYPE VALUE
service_names string BDED1.es.aulas-grp
SQL> show parameter global;
NAME TYPE VALUE
global_context_pool_size string
global_names boolean FALSE

Answer 1

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Why do you need it? I think it's not a problem if you have to mention "MYDBLINK.ES.AULAS-GRP" instead of “MYDBLINK”.
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You can try this:
<br><br>
First chack your gobal_name:<br>
SELECT * FROM global_name;<br><br>
If it is MYDBLINK.ES.AULAS-GRP then you can change your GLOBAL_NAME format from <database name>[.db_domain] to <database name> only
<br>
ALTER DATABASE RENAME GLOBAL_NAME TO MYDBLINK;
<br><br>
This may have serious consequences in other links/queries of you Database. Please check all associated options before doing it.
<br><br>
Please know more about Global Database Name from Metalink: <br>
Note 115499.1 Global Database Name Explained
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