Does SID always register with the listener?

Does the SID of a database ALWAYS register itself with the listener even if
the service_name parameter is set to a different name than the SID?

I have this configuration :

FINNTEST> show parameter local

NAME                                 TYPE        VALUE
------------------------------------ -----------
------------------------------
local_listener                       string      FINNTESTSB

FINNTEST> show parameter service

NAME                                 TYPE        VALUE
------------------------------------ -----------
------------------------------
service_names                        string      FINNTESTSB.CEG.CORP.NET

listener.ora :

FINNTESTSB =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = v240-msw-14.ceg.corp.net)(PORT =
1557))
      )
    )
  )

and get this :

lsnrctl stat FINNTESTSB

LSNRCTL for Solaris: Version 10.2.0.3.0 - Production on 25-FEB-2008 16:04:09

Copyright (c) 1991, 2006, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=
v240-msw-14.ceg.corp.net)(PORT=1557)))
STATUS of the LISTENER
------------------------
Alias                     FINNTESTSB
Version                   TNSLSNR for Solaris: Version 10.2.0.3.0 -
Production
Start Date                25-FEB-2008 15:21:44
Uptime                    0 days 0 hr. 42 min. 25 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /oracle/network/ladmin/listener.ora
Listener Log File
/oracle/product/10.2.0.3/network/log/finntestsb.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=v240-msw-14.ceg.corp.net
)(PORT=1557)))
Services Summary...
Service "FINNTEST.CEG.CORP.NET" has 1 instance(s).
  Instance "FINNTEST", status READY, has 1 handler(s) for this service...
Service "FINNTESTSB.CEG.CORP.NET" has 1 instance(s).
  Instance "FINNTEST", status READY, has 1 handler(s) for this service...
The command completed successfully

Is there a way to get rid of the SID registration?

Finn

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