Service name from user level through any query

Question

Hi
One of my user want to find the oracle service name through SQL query from user level. This user is not a DBA.
With DBA privs this querry
SELECT NAME, VALUE FROM V$PARAMETER WHERE NAME = 'service_names';
brings the correct result. But user he will not have the access to read the V$PARAMETER table which is part of sys object.
select sys_context('USERENV','SERVICE_NAME') from dual;
SYS_CONTEXT('USERENV','SERVICE_NAME')
SYS$USERS
this query is not giving my the correct result. Is there any way we can grab the service name from user level.
Your cooperation is highly appreciated.
Rao

Answer 1

select sys_context('USERENV','SERVICE_NAME') from dual;You need to note that the result of the above depends on how you connect to the database. If you connect using NET Service, it should give you the SERVICE_NAME.
SQL> conn sys as sysdba
Enter password:
Connected.
SQL> show parameters service_name
NAME TYPE VALUE
service_names string testdb
SQL> select sys_context('USERENV','SERVICE_NAME') from dual;
SYS_CONTEXT('USERENV','SERVICE_NAME')
SYS$USERS
SQL> conn sys@testdb as sysdba
Enter password:
Connected.
SQL> select sys_context('USERENV','SERVICE_NAME') from dual;
SYS_CONTEXT('USERENV','SERVICE_NAME')
testdb
SQL> conn scott@testdb
Enter password:
Connected.
SQL> select sys_context('USERENV','SERVICE_NAME') from dual;
SYS_CONTEXT('USERENV','SERVICE_NAME')
testdb
SQL> conn scott
Enter password:
Connected.
SQL> select sys_context('USERENV','SERVICE_NAME') from dual;
SYS_CONTEXT('USERENV','SERVICE_NAME')
SYS$USERS
SQL>
So you need to understand the use of sys_context