Cursor operation between package functions

    
SQL>
SQL> CREATE TABLE lecturer (
  2    id               NUMBER(5) PRIMARY KEY,
  3    first_name       VARCHAR2(20),
  4    last_name        VARCHAR2(20),
  5    major            VARCHAR2(30),
  6    current_credits  NUMBER(3)
  7    );

Table created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10001, 'Scott', 'Lawson','Computer Science', 11);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major, current_credits)
  2                VALUES (10002, 'Mar', 'Wells','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10003, 'Jone', 'Bliss','Computer Science', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10004, 'Man', 'Kyte','Economics', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10005, 'Pat', 'Poll','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10006, 'Tim', 'Viper','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10007, 'Barbara', 'Blues','Economics', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10008, 'David', 'Large','Music', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10009, 'Chris', 'Elegant','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10010, 'Rose', 'Bond','Music', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10011, 'Rita', 'Johnson','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10012, 'Sharon', 'Clear','Computer Science', 3);

1 row created.

SQL>
SQL>
SQL>
SQL> CREATE OR REPLACE PACKAGE StudentFetch AS
  2    TYPE t_lecturer IS TABLE OF lecturer%ROWTYPE
  3      INDEX BY BINARY_INTEGER;
  4    PROCEDURE OpenCursor;
  5    PROCEDURE CloseCursor;
  6    FUNCTION FetchRows(p_BatchSize IN OUT NUMBER,p_lecturer OUT t_lecturer)
  7      RETURN BOOLEAN;
  8    PROCEDURE PrintRows(p_BatchSize IN NUMBER,
  9                        p_lecturer IN t_lecturer);
 10  END StudentFetch;
 11  /

Package created.

SQL> show errors
No errors.
SQL>
SQL> CREATE OR REPLACE PACKAGE BODY StudentFetch AS
  2    CURSOR myAllLecturer IS
  3      SELECT *
  4        FROM lecturer
  5        ORDER BY ID;
  6
  7    PROCEDURE OpenCursor IS
  8    BEGIN
  9      OPEN myAllLecturer;
 10    END OpenCursor;
 11
 12    PROCEDURE CloseCursor IS
 13    BEGIN
 14      CLOSE myAllLecturer;
 15    END CloseCursor;
 16
 17    FUNCTION FetchRows(p_BatchSize IN OUT NUMBER,
 18                       p_lecturer OUT t_lecturer)
 19      RETURN BOOLEAN IS
 20      v_Finished BOOLEAN := TRUE;
 21    BEGIN
 22      FOR v_Count IN 1..p_BatchSize LOOP
 23        FETCH myAllLecturer INTO p_lecturer(v_Count);
 24        IF myAllLecturer%NOTFOUND THEN
 25          v_Finished := FALSE;
 26          p_BatchSize := v_Count - 1;
 27          EXIT;
 28        END IF;
 29      END LOOP;
 30      RETURN v_Finished;
 31    END FetchRows;
 32
 33    PROCEDURE PrintRows(p_BatchSize IN NUMBER,
 34                        p_lecturer IN t_lecturer) IS
 35    BEGIN
 36      FOR v_Count IN 1..p_BatchSize LOOP
 37        DBMS_OUTPUT.PUT('ID: ' || p_lecturer(v_Count).ID);
 38        DBMS_OUTPUT.PUT(' Name: ' || p_lecturer(v_Count).first_name);
 39        DBMS_OUTPUT.PUT_LINE(' ' || p_lecturer(v_Count).last_name);
 40      END LOOP;
 41    END PrintRows;
 42  END StudentFetch;
 43  /

Package body created.

SQL> show errors
No errors.
SQL>
SQL>
SQL>
SQL> drop table lecturer;

Table dropped.

SQL>

Related examples in the same category

1.	Create a package declaration and create its body after
2.	Create a package level variable
3.	call utitilities package
4.	Package for output employee table and log message
5.	Package with package level cursor variable
6.	Overloading Packaged Subprograms
7.	A PL/SQL package with two methods
8.	Package level Exception
9.	This package will not compile because the body does not match the specification.
10.	dependencies between an anonymous calling block and package runtime state.
11.	RESTRICT_REFERENCES pragma.
12.	Without RESTRICT_REFERENCES pragma.
13.	Persistance of packaged variables.
14.	A package with one method
15.	Package level variable as global level variable
16.	Global definition
17.	Student fetch package
18.	The pragma is not valid at the package level.
19.	Create package and member cursor
20.	Nested package reference
21.	Overloaded packages.
22.	Overloading based on user defined object types.
23.	package RECURSION
24.	Crosss reference between two packages
25.	Counter package
26.	Package initialization.
27.	Packages allows forward references, thus opening the possibilities for recursion.
28.	Use package level type as global variables
29.	Use package member variable to pass value

Cursor operation between package functions : Package « PL SQL « Oracle PL / SQL

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