Help with creation of trigger

Question

Have to create trigger for DML statements on a table for certain columns, BUT any insertions,deletions and update must be recorded onto another schema table which also uses the sys_context() function.
herewith the table that is already created
SQL> desc oradba.oprfile_audit
Name                                      Null?    Type
OLD_OF_OPID                                        VARCHAR2(8)
OLD_OF_DEFQUE                                      VARCHAR2(20)
NEW_OF_OPID                                        VARCHAR2(8)
NEW_OF_DEFQUE                                      VARCHAR2(20)
SYS_TYPE                                           CHAR(1)
SYS_CLIENT_IDENTIFIER                              VARCHAR2(64)
SYS_OS_USER                                        VARCHAR2(64)
SYS_HOST                                           VARCHAR2(64)
SYS_IP_ADDRESS                                     VARCHAR2(64)
SYS_TERMINAL                                       VARCHAR2(64)
SYS_MODULE                                         VARCHAR2(64)
SYS_DATE                                           DATEHerewith my trigger I tried creating:
CREATE OR REPLACE TRIGGER MAC.oprfile_trg
BEFORE DELETE OR INSERT OR UPDATE
OF OF_OPID
  ,OF_DEFQUE
ON MAC.OPRFILE
REFERENCING NEW AS New OLD AS Old
FOR EACH ROW
DECLAREThe problem I have is where to put the insert into statement, and to declare the values to be inserted
ANY HELP WILL BE MUCH APPRECIATED

Answer 1

Hi,
just had a quick test. I have removed the owner to create in my own schema in my local database.
Also I did not know the structure of OPRFILE table and I made some assumptions.
Check below
CREATE TABLE OPRFILE (
OF_OPID                                        VARCHAR2(8),
OF_DEFQUE                                      VARCHAR2(20),
SYS_TYPE                                           CHAR(1),
SYS_CLIENT_IDENTIFIER                              VARCHAR2(64),
SYS_OS_USER                                        VARCHAR2(64),
SYS_HOST                                           VARCHAR2(64),
SYS_IP_ADDRESS                                     VARCHAR2(64),
SYS_TERMINAL                                       VARCHAR2(64),
SYS_MODULE                                         VARCHAR2(64),
SYS_DATE                                           DATE
CREATE TABLE OPRFILE_AUDIT (
OLD_OF_OPID                                        VARCHAR2(8),
OLD_OF_DEFQUE                                      VARCHAR2(20),
NEW_OF_OPID                                        VARCHAR2(8),
NEW_OF_DEFQUE                                      VARCHAR2(20),
SYS_TYPE                                           CHAR(1),
SYS_CLIENT_IDENTIFIER                              VARCHAR2(64),
SYS_OS_USER                                        VARCHAR2(64),
SYS_HOST                                           VARCHAR2(64),
SYS_IP_ADDRESS                                     VARCHAR2(64),
SYS_TERMINAL                                       VARCHAR2(64),
SYS_MODULE                                         VARCHAR2(64),
SYS_DATE                                           DATE
-- Keep the trigger simple, why repeating 3 times insert?
CREATE OR REPLACE TRIGGER oprfile_trg
   BEFORE INSERT OR UPDATE OR DELETE OF of_opid, of_defque
   ON oprfile
   REFERENCING NEW AS new OLD AS old
   FOR EACH ROW
DECLARE
   v_sys_type     CHAR (1);
BEGIN
   IF INSERTING
   THEN
      v_sys_type := 'A';
   ELSIF UPDATING
   THEN
      v_sys_type := 'C';
   ELSIF DELETING
   THEN
      v_sys_type := 'D';
   END IF;
   INSERT INTO oprfile_audit (old_of_opid, old_of_defque, new_of_opid
                , new_of_defque, sys_type, sys_client_identifier
                , sys_os_user, sys_host, sys_ip_address
                , sys_terminal, sys_module, sys_date)
        VALUES (:old.of_opid, :old.of_defque
              , :new.of_opid, :new.of_defque
              , v_sys_type, SYS_CONTEXT ('USERENV', 'CLIENT_IDENTIFIER')
              , SYS_CONTEXT ('USERENV', 'OS_USER'), SYS_CONTEXT ('USERENV', 'HOST')
              , SYS_CONTEXT ('USERENV', 'IP_ADDRESS'), SYS_CONTEXT ('USERENV', 'TERMINAL')
              , SYS_CONTEXT ('USERENV', 'MODULE'), SYSDATE);
EXCEPTION
   WHEN OTHERS
   THEN
      -- Consider logging the error and then re-raise
      RAISE;
END oprfile_trg;
-- Testing ....
INSERT INTO oprfile (of_opid, of_defque)
     VALUES ('OF_OPID1', 'OF_DEFQUE1');
INSERT INTO oprfile (of_opid, of_defque)
     VALUES ('OF_OPID2', 'OF_DEFQUE2');
INSERT INTO oprfile (of_opid, of_defque)
     VALUES ('OF_OPID3', 'OF_DEFQUE3');
UPDATE oprfile
   SET of_defque = 'OF_DEFQUE99'
WHERE of_opid = 'OF_OPID1';
DELETE oprfile
WHERE of_opid = 'OF_OPID2';
COMMIT;
-- output
SELECT * FROM oprfile_audit;
OLD_OF_OPID OLD_OF_DEFQUE        NEW_OF_OPID NEW_OF_DEFQUE        SYS_TYPE SYS_CLIENT_IDENTIFIER SYS_OS_USER       SYS_HOST         SYS_IP_ADDRESS SYS_TERMINAL SYS_MODULE    SYS_DATE           
                                 OF_OPID1    OF_DEFQUE1           A                              TGDFAAL4          U187662          127.0.0.1      U187662      TOAD 10.5.1.3 14/06/2012 15:41:07
                                 OF_OPID2    OF_DEFQUE2           A                              TGDFAAL4          U187662          127.0.0.1      U187662      TOAD 10.5.1.3 14/06/2012 15:41:08
                                 OF_OPID3    OF_DEFQUE3           A                              TGDFAAL4          U187662          127.0.0.1      U187662      TOAD 10.5.1.3 14/06/2012 15:41:08
OF_OPID1    OF_DEFQUE1           OF_OPID1    OF_DEFQUE99          C                              TGDFAAL4          U187662          127.0.0.1      U187662      TOAD 10.5.1.3 14/06/2012 15:41:08
OF_OPID2    OF_DEFQUE2                                            D                              TGDFAAL4          U187662          127.0.0.1      U187662      TOAD 10.5.1.3 14/06/2012 15:41:08
{code}
Regards.
Al