Calling Functions and Procedures in a Package : Packages « Function Procedure Packages « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Function Procedure Packages » Packages 
27. 10. 9. Calling Functions and Procedures in a Package

When calling functions and procedures in a package, you include the package name in the call.

SQL>
SQL>
SQL> -- create demo table
SQL> create table Employee(
  2    ID                 VARCHAR2(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  /

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  /

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  /

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  /

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  /

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  /

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  /

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  /

row created.

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

rows selected.

SQL>
SQL>
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,p_factor IN NUMBER);
  5  END employee_package;
  6  /

Package created.

SQL>
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, p_factor IN NUMBERAS
 15      v_employee_count INTEGER;
 16    BEGIN
 17        UPDATE employee
 18        SET salary = salary * p_factor;
 19        COMMIT;
 20    EXCEPTION
 21      WHEN OTHERS THEN
 22        -- perform a rollback when an exception occurs
 23        ROLLBACK;
 24    END update_salary;
 25  END employee_package;
 26  /

Package body created.

SQL>
SQL> SELECT employee_package.get_employee_ref_cursor
  2  FROM dual;

GET_EMPLOYEE_REF_CUR
--------------------
CURSOR STATEMENT : 1

CURSOR STATEMENT : 1

ID   FIRST_NAME     SALARY
---- ---------- ----------
01   Jason         1234.56
02   Alison        6661.78
03   James         6544.78
04   Celia         2344.78
05   Robert        2334.78
06   Linda         4322.78
07   David         7897.78
08   James         1232.78

rows selected.


SQL>
SQL>
SQL> -- clean the table
SQL> drop table Employee
  2  /

Table dropped.

SQL>
27. 10. Packages
27. 10. 1. Packages
27. 10. 2. Private Versus Public Package Objects
27. 10. 3. Package State
27. 10. 4. Recompiling Packages
27. 10. 5. All packages can be recompiled by using the Oracle utility dbms_utility:
27. 10. 6. Creating a Package Specification
27. 10. 7. Creating a Package Body
27. 10. 8. Creating Packages and call its functions
27. 10. 9. Calling Functions and Procedures in a Package
27. 10. 10. A Package Specification and its body
27. 10. 11. Overloading Packaged Subprograms
27. 10. 12. Calls procedure in a package
27. 10. 13. Dropping a Package
27. 10. 14. Calling a Cursor Declared in a Different Package
27. 10. 15. Reference fields and methods in package
27. 10. 16. Controlling access to packages
27. 10. 17. Globals Stored in a Package
27. 10. 18. A Subtypes Example
27. 10. 19. Generate Random number
27. 10. 20. Crosss reference between two packages
27. 10. 21. package RECURSION
27. 10. 22. Using RESTRICT_REFERENCES in a Package
27. 10. 23. PLS-00452: Subprogram 'GETNAME' violates its associated pragma
27. 10. 24. Dynamically create packages
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