A continuación vemos dos maneras de obtener el SID, SERIAL y número de instancia para nuestra propia sesión en un RAC:
select
sid,
serial#,
inst_id
from gv$session
where sid = (select sid from v$mystat where rownum = 1);
SID SERIAL# INST_ID
---------- ---------- ---------
139 24875 1
Executed in 0,39 seconds
select
to_number(substr(dbms_session.unique_session_id, 1, 4), 'xxxx') as sid,
to_number(substr(dbms_session.unique_session_id, 5, 4), 'xxxx') as serial#,
to_number(substr(dbms_session.unique_session_id, 9, 4), 'xxxx') as inst_id
from dual;
SID SERIAL# INST_ID
---------- ---------- -------
139 24875 1
Executed in 0,405 seconds
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