Unregister service name from listener

Question

Hi,
I have a default listener (named LISTENER, port 1521) and a database with SID=ORCL. The database automatically registers with the listener, the output of "lsnrctl status" is:
Service "orcl" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orcl_XPT" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully
And the value of the service_names parameter is:
SQL> show parameter service_names
NAME                                 TYPE        VALUE
service_names                        string      orclNow I'd like to prevent clients to connect to the database using the service name 'ORCL', so I changed the service_names init parameter:
SQL> alter system set service_names=testdb;
System altered.
Then I restarted the listener. The "problem" is that the database registers with the listener also the 'ORCL' service name:
Service "TESTDB" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orcl" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orcl_XPT" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully
Is it possible to somehow prevent the database from registering the service name ORCL with the listener?
If you're wondering why I'm asking that, it's because this database is a duplicated production database (on a different host), and I'd like to prevent the possibility of mistakenly connecting to the production DB. I'm aware it would be better if I change the database's SID altogether, but currently that's not possible.
Thank you in advance for any answer.
Regards,
Jure

Answer 1

Hi coskan,
Thanks for the answer.
Jut a question at the beginning. Doesn't the SID_LIST_listener_name parameter define which databases the listener listens to (and not the single services the database offers)? As I understand, I can prevent automatic registration of a database into the listener, but not selectively allow only some services the database offers? Maybe I'm completely wrong, so please correct me if it's so :-)
As you suggetsed I tried the following:
listener.ora:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1522))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = ORCL)
(ORACLE_HOME = E:\oracle\product\10.2.0\db_4)
tnsnames.ora:
LISTENER=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1522))
SQL> show parameter local_listener
NAME                                 TYPE        VALUE
local_listener                       string      LISTENERlsnrctl status:
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1522)))
Services Summary...
Service "ORCL" has 1 instance(s).
Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
So, now only the service ORCL is registred, although the init parameter service_names=TESTDB. I can connect using ORCL as the service_name in the connection string, but not using TESTDB.
Regards,
Jure