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SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, 'SMITH', 'CLERK', 7902, TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, 'ALLEN', 'SALESMAN', 7698, TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, 'WARD', 'SALESMAN', 7698, TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, 'JONES', 'MANAGER', 7839, TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, 'MARTIN', 'SALESMAN', 7698,TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, 'BLAKE', 'MANAGER', 7839,TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, 'CLARK', 'MANAGER', 7839,TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, 'SCOTT', 'ANALYST', 7566,TO_DATE('09-DEC-1982', 'DD-MON-YYYY'), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, 'KING', 'PRESIDENT', NULL,TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, 'TURNER', 'SALESMAN', 7698,TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, 'ADAMS', 'CLERK', 7788,TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, 'JAMES', 'CLERK', 7698,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, 'FORD', 'ANALYST', 7566,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, 'MILLER', 'CLERK', 7782,TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10);
1 row created.
SQL>
SQL> create table myLogTable(
2 username varchar2(30),
3 date_time timestamp,
4 message varchar2(4000) );
Table created.
SQL>
SQL>
SQL>
SQL> create or replace
2 package employee_pkg as
3 procedure print_ename( p_empno number );
4 procedure print_sal( p_empno number );
5 end employee_pkg;
6 /
Package created.
SQL>
SQL> create or replace
2 package body employee_pkg as
3
4 procedure log_message( p_message varchar2 ) is
5 pragma autonomous_transaction;
6 begin
7 insert into myLogTable( username, date_time, message )
8 values ( user, current_date, p_message );
9 commit;
10 end log_message;
11
12 function get_emp_record( p_empno number ) return emp%rowtype is
13 l_emp_record emp%rowtype;
14 begin
15 log_message( 'Looking for record where EMPNO = ' || p_empno );
16 select *
17 into l_emp_record
18 from emp
19 where empno = p_empno;
20 return l_emp_record;
21 exception
22 when NO_DATA_FOUND then
23 return null;
24 end get_emp_record;
25
26 procedure print_data( p_emp_record emp%rowtype,
27 p_column varchar2 ) is
28 l_value varchar2(4000);
29 begin
30 if p_emp_record.empno is null then
31 log_message( 'No Data Found.' );
32 dbms_output.put_line( 'No Data Found.' );
33 else
34 case p_column
35 when 'ENAME' then
36 l_value := p_emp_record.ename;
37 when 'SAL' then
38 l_value := nvl(p_emp_record.sal,0);
39 else
40 l_value := 'Invalid Column';
41 end case;
42 log_message( 'About to print ' || p_column || ' = ' || l_value );
43 dbms_output.put_line( p_column || ' = ' || l_value );
44 end if;
45 end print_data;
46
47 procedure print_ename( p_empno number ) is
48 begin
49 print_data( get_emp_record( p_empno ), 'ENAME' );
50 end print_ename;
51
52 procedure print_sal( p_empno number ) is
53 begin
54 print_data( get_emp_record( p_empno ), 'SAL' );
55 end print_sal;
56
57 end employee_pkg;
58 /
Package body created.
SQL>
SQL> exec employee_pkg.print_ename( 7781 );
No Data Found.
PL/SQL procedure successfully completed.
SQL>
SQL> exec employee_pkg.print_ename( 7782 );
ENAME = CLARK
PL/SQL procedure successfully completed.
SQL>
SQL> select * from myLogTable;
USERNAME DATE_TIME
------------------------------ ---------------------------------------------------------------------------
MESSAGE
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SYS 11-JUN-08 08.44.45.000000 PM
Looking for record where EMPNO = 7781
SYS 11-JUN-08 08.44.45.000000 PM
No Data Found.
SYS 11-JUN-08 08.44.45.000000 PM
Looking for record where EMPNO = 7782
USERNAME DATE_TIME
------------------------------ ---------------------------------------------------------------------------
MESSAGE
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SYS 11-JUN-08 08.44.45.000000 PM
About to print ENAME = CLARK
SQL>
SQL> execute employee_pkg.print_ename( 1234 );
No Data Found.
PL/SQL procedure successfully completed.
SQL>
SQL> execute employee_pkg.print_ename( 7782 );
ENAME = CLARK
PL/SQL procedure successfully completed.
SQL>
SQL> execute employee_pkg.print_sal( 7782 );
SAL = 2450
PL/SQL procedure successfully completed.
SQL>
SQL> drop table myLogTable;
Table dropped.
SQL> drop table emp;
Table dropped.
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