Mega Code Archive

Log all triggerable action

SQL> -- create demo table SQL> create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15 BYTE) 10 ) 11 / SQL> SQL> -- prepare data SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values ('01','Jason', 'Martin', to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto', 'Programmer') 3 / SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('02','Alison', 'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester') 3 / SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('03','James', 'Smith', to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester') 3 / SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('04','Celia', 'Rice', to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager') 3 / SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('05','Robert', 'Black', to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester') 3 / SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('06','Linda', 'Green', to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York', 'Tester') 3 / SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('07','David', 'Larry', to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York', 'Manager') 3 / SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('08','James', 'Cat', to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester') 3 / SQL> SQL> SQL> SQL> -- display data in the table SQL> select * from Employee 2 / ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION ---- ---------- ---------- --------- --------- ---------- ---------- --------------- 01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester 04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester SQL> SQL> SQL> SQL> create table employees_copy as select * from employee; SQL> SQL> create table employees_log( 2 who varchar2(30), 3 action varchar2(100), 4 when date ); SQL> SQL> SQL> create or replace trigger biud_employees_copy 2 before insert or update or delete 3 on employees_copy 4 begin 5 state_package.rows_changed := 0; 6 end; 7 / SQL> SQL> create trigger biudfer_employees_copy 2 before insert or update or delete 3 on employees_copy 4 for each row 5 declare 6 l_action employees_log.action%type; 7 begin 8 if INSERTING then 9 l_action := 'Insert'; 10 elsif UPDATING then 11 l_action := 'Update'; 12 elsif DELETING then 13 l_action := 'Delete'; 14 else 15 raise_application_error( -20001, 16 'You should never ever get this error.' ); 17 end if; 18 19 state_package.rows_changed := state_package.rows_changed + 1; 20 21 if UPDATING( 'SALARY' ) then 22 l_action := l_action || ' - ' || 23 'Salary for id ' || :old.id || 24 ' changed from ' || :old.salary || 25 ' to ' || :new.salary; 26 end if; 27 28 insert into employees_log( 29 who, action, when ) 30 values( 31 user, l_action, sysdate ); 32 end; 33 / SQL> SQL> create trigger aiud_employees_copy 2 after insert or update or delete 3 on employees_copy 4 declare 5 l_action employees_log.action%type; 6 begin 7 if INSERTING then 8 l_action := state_package.rows_changed || ' were ' || 'inserted'; 9 elsif UPDATING then 10 l_action := state_package.rows_changed || ' were ' || 'updated'; 11 elsif DELETING then 12 l_action := state_package.rows_changed || ' were ' || 'deleted'; 13 else 14 raise_application_error( -20001, 15 'You should never ever get this error.' ); 16 end if; 17 18 insert into employees_log( 19 who, action, when ) 20 values( 21 user, l_action, sysdate ); 22 end; 23 / SQL> SQL> update employees_copy set salary = salary * 0.95; SQL> SQL> SQL> select * from employees_log; WHO ACTION WHEN ------------------------------ ---------------------------------------------------------------------------------------------------- --------- RNTSOFT Update - Salary for id 01 changed from 1234.56 to 1172.83 09-SEP-06 RNTSOFT Update - Salary for id 02 changed from 6661.78 to 6328.69 09-SEP-06 RNTSOFT Update - Salary for id 03 changed from 6544.78 to 6217.54 09-SEP-06 RNTSOFT Update - Salary for id 04 changed from 2344.78 to 2227.54 09-SEP-06 RNTSOFT Update - Salary for id 05 changed from 2334.78 to 2218.04 09-SEP-06 RNTSOFT Update - Salary for id 06 changed from 4322.78 to 4106.64 09-SEP-06 RNTSOFT Update - Salary for id 07 changed from 7897.78 to 7502.89 09-SEP-06 RNTSOFT Update - Salary for id 08 changed from 1232.78 to 1171.14 09-SEP-06 RNTSOFT 8 were updated 09-SEP-06 SQL> SQL> SQL> drop table employees_copy; SQL> SQL> drop table employees_log; SQL> SQL> -- clean the table SQL> drop table Employee 2 / SQL> SQL> SQL> SQL>