Retrieving OS username and Machine name

Question

Is it possible to retrieve the Operating System username and name of the machine using SQL?

Answer 1

there are a couple of parameters you can retrieve. See the following view:
create or replace view my_userenv (
AUDITED_CURSORID ,
AUTHENTICATION_DATA ,
AUTHENTICATION_TYPE ,
BG_JOB_ID ,
CLIENT_IDENTIFIER ,
CLIENT_INFO ,
CURRENT_SCHEMA ,
CURRENT_SCHEMAID ,
CURRENT_SQL ,
CURRENT_USER ,
CURRENT_USERID ,
DB_DOMAIN ,
DB_NAME ,
ENTRYID ,
EXTERNAL_NAME ,
FG_JOB_ID ,
GLOBAL_CONTEXT_MEMORY ,
HOST ,
INSTANCE ,
IP_ADDRESS ,
ISDBA ,
LANG ,
LANGUAGE ,
NETWORK_PROTOCOL ,
NLS_CALENDAR ,
NLS_CURRENCY ,
NLS_DATE_FORMAT ,
NLS_DATE_LANGUAGE ,
NLS_SORT ,
NLS_TERRITORY ,
OS_USER ,
PROXY_USER ,
PROXY_USERID ,
SESSION_USER ,
SESSION_USERID ,
SESSIONID ,
TERMINAL
) AS SELECT
SYS_CONTEXT ('USERENV', 'AUDITED_CURSORID') ,
SYS_CONTEXT ('USERENV', 'AUTHENTICATION_DATA') ,
SYS_CONTEXT ('USERENV', 'AUTHENTICATION_TYPE') ,
SYS_CONTEXT ('USERENV', 'BG_JOB_ID') ,
SYS_CONTEXT ('USERENV', 'CLIENT_IDENTIFIER') ,
SYS_CONTEXT ('USERENV', 'CLIENT_INFO') ,
SYS_CONTEXT ('USERENV', 'CURRENT_SCHEMA') ,
SYS_CONTEXT ('USERENV', 'CURRENT_SCHEMAID') ,
SYS_CONTEXT ('USERENV', 'CURRENT_SQL') ,
SYS_CONTEXT ('USERENV', 'CURRENT_USER') ,
SYS_CONTEXT ('USERENV', 'CURRENT_USERID') ,
SYS_CONTEXT ('USERENV', 'DB_DOMAIN') ,
SYS_CONTEXT ('USERENV', 'DB_NAME') ,
SYS_CONTEXT ('USERENV', 'ENTRYID') ,
SYS_CONTEXT ('USERENV', 'EXTERNAL_NAME') ,
SYS_CONTEXT ('USERENV', 'FG_JOB_ID') ,
SYS_CONTEXT ('USERENV', 'GLOBAL_CONTEXT_MEMORY') ,
SYS_CONTEXT ('USERENV', 'HOST') ,
SYS_CONTEXT ('USERENV', 'INSTANCE') ,
SYS_CONTEXT ('USERENV', 'IP_ADDRESS') ,
SYS_CONTEXT ('USERENV', 'ISDBA') ,
SYS_CONTEXT ('USERENV', 'LANG') ,
SYS_CONTEXT ('USERENV', 'LANGUAGE') ,
SYS_CONTEXT ('USERENV', 'NETWORK_PROTOCOL') ,
SYS_CONTEXT ('USERENV', 'NLS_CALENDAR') ,
SYS_CONTEXT ('USERENV', 'NLS_CURRENCY') ,
SYS_CONTEXT ('USERENV', 'NLS_DATE_FORMAT') ,
SYS_CONTEXT ('USERENV', 'NLS_DATE_LANGUAGE') ,
SYS_CONTEXT ('USERENV', 'NLS_SORT') ,
SYS_CONTEXT ('USERENV', 'NLS_TERRITORY') ,
SYS_CONTEXT ('USERENV', 'OS_USER') ,
SYS_CONTEXT ('USERENV', 'PROXY_USER') ,
SYS_CONTEXT ('USERENV', 'PROXY_USERID') ,
SYS_CONTEXT ('USERENV', 'SESSION_USER') ,
SYS_CONTEXT ('USERENV', 'SESSION_USERID') ,
SYS_CONTEXT ('USERENV', 'SESSIONID') ,
SYS_CONTEXT ('USERENV', 'TERMINAL')
from dual;