Mega Code Archive
Dropping a Package
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You drop a package using DROP PACKAGE.
SQL>
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 /
Table created.
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 /
1 row created.
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 /
1 row created.
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 /
1 row created.
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 /
1 row created.
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 /
1 row created.
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 /
1 row created.
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 /
1 row created.
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 /
1 row created.
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
8 rows selected.
SQL>
SQL> CREATE OR REPLACE PACKAGE employee_package AS
2 TYPE t_ref_cursor IS REF CURSOR;
3 FUNCTION get_employee_ref_cursor RETURN t_ref_cursor;
4 PROCEDURE update_salary (p_id IN VARCHAR2,
5 p_factor IN NUMBER
6 );
7 END employee_package;
8 /
Package created.
SQL>
SQL> CREATE OR REPLACE PACKAGE BODY employee_package AS
2 FUNCTION get_employee_ref_cursor
3 RETURN t_ref_cursor IS
4 employee_ref_cursor t_ref_cursor;
5 BEGIN
6 -- get the REF CURSOR
7 OPEN employee_ref_cursor FOR
8 SELECT id, first_name, salary
9 FROM employee;
10 -- return the REF CURSOR
11 RETURN employee_ref_cursor;
12 END get_employee_ref_cursor;
13
14 PROCEDURE update_salary (p_id IN VARCHAR2,
15 p_factor IN NUMBER
16 ) AS
17 v_employee_count INTEGER;
18 BEGIN
19 -- count the number of employees with the
20 -- supplied id (should be 1 if the employee exists)
21 SELECT COUNT(*)
22 INTO v_employee_count
23 FROM employee
24 WHERE id = p_id;
25 -- if the employee exists (v_employee_count = 1) then
26 -- update that employee's pass1
27 IF v_employee_count = 1 THEN
28 UPDATE employee
29 SET salary = salary * p_factor
30 WHERE id = p_id;
31 COMMIT;
32 END IF;
33 EXCEPTION
34 WHEN OTHERS THEN
35 -- perform a rollback when an exception occurs
36 ROLLBACK;
37 END update_salary;
38 END employee_package;
39 /
Package body created.
SQL>
SQL> SELECT object_name, procedure_name
2 FROM user_procedures
3 WHERE object_name = 'EMPLOYEE_PACKAGE';
OBJECT_NAME PROCEDURE_NAME
------------------------------ ------------------------------
EMPLOYEE_PACKAGE GET_EMPLOYEE_REF_CURSOR
EMPLOYEE_PACKAGE UPDATE_SALARY
SQL>
SQL> DROP PACKAGE EMPLOYEE_PACKAGE;
SQL>
SQL> -- clean the table
SQL> drop table Employee
2 /
Table dropped.
SQL>
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