e.g. DDL audit trigger
CREATE TABLE SYSTEM.audit_ddl_history
(
osuser varchar2(50),
session_user varchar2(50),
host varchar2(50),
terminal varchar2(50),
object_owner varchar2(50),
obejct_type varchar2(50),
object_name varchar2(50),
sysevent varchar2(50),
audit_date date
);
CREATE OR REPLACE TRIGGER SYSTEM.ALPERDB_AUDIT_HISTORY
AFTER DDL
ON DATABASE
begin
if (ora_sysevent='GRANT')
then
NULL; -- don't care to grant!
else
insert into SYSTEM.audit_ddl_history(osuser, session_user, host, terminal, object_owner, obejct_type, object_name, sysevent,audit_date)
values(
sys_context('USERENV','OS_USER') ,
sys_context('USERENV','SESSION_USER') ,
sys_context('USERENV','HOST') ,
sys_context('USERENV','TERMINAL') ,
ora_dict_obj_owner,
ora_dict_obj_type,
ora_dict_obj_name,
ora_sysevent,
sysdate
);
end if;
end;
/
e.g.
SQL>
SELECT SYS_CONTEXT ('USERENV', 'SESSION_USER') FROM DUAL;
Ref: https://docs.oracle.com/cd/B10501_01/appdev.920/a96590/adg14evt.htm
