Can we declare a cursor in the Specs of package?

Dear friends
I can declare a cursor in the package Specs so that I can call this slider and use its data in certain procedures and functions of the package. Otherwise I have to write this slider for each subprogramme of a package which I'm not a clever way to accomplish the task.

Hello

Here is a short example with all the way down. Perhaps the concept becomes more clear with this:

first of all, if you do not have the table emp, here the DDL for this example.
Attention, only works for German customers because the names of the months, sorry for that.

CREATE TABLE EMP
(EMPNO NUMBER(4) NOT NULL,
ENAME VARCHAR2(10),
JOB VARCHAR2(9),
MGR NUMBER(4),
HIREDATE DATE,
SAL NUMBER(7, 2),
COMM NUMBER(7, 2),
DEPTNO NUMBER(2));
set echo on

INSERT INTO EMP VALUES
(7369, 'SMITH', 'CLERK', 7902,
TO_DATE('17-DEZ-1980', 'DD-MON-YYYY'), 800, NULL, 20);
INSERT INTO EMP VALUES
(7499, 'ALLEN', 'SALESMAN', 7698,
TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30);
INSERT INTO EMP VALUES
(7521, 'WARD', 'SALESMAN', 7698,
TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30);
INSERT INTO EMP VALUES
(7566, 'JONES', 'MANAGER', 7839,
TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20);
INSERT INTO EMP VALUES
(7654, 'MARTIN', 'SALESMAN', 7698,
TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30);
INSERT INTO EMP VALUES
(7698, 'BLAKE', 'MANAGER', 7839,
TO_DATE('1-MAI-1981', 'DD-MON-YYYY'), 2850, NULL, 30);
INSERT INTO EMP VALUES
(7782, 'CLARK', 'MANAGER', 7839,
TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10);
INSERT INTO EMP VALUES
(7788, 'SCOTT', 'ANALYST', 7566,
TO_DATE('09-DEZ-1982', 'DD-MON-YYYY'), 3000, NULL, 20);
INSERT INTO EMP VALUES
(7839, 'KING', 'PRESIDENT', NULL,
TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10);
INSERT INTO EMP VALUES
(7844, 'TURNER', 'SALESMAN', 7698,
TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30);
INSERT INTO EMP VALUES
(7876, 'ADAMS', 'CLERK', 7788,
TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20);
INSERT INTO EMP VALUES
(7900, 'JAMES', 'CLERK', 7698,
TO_DATE('3-DEZ-1981', 'DD-MON-YYYY'), 950, NULL, 30);
INSERT INTO EMP VALUES
(7902, 'FORD', 'ANALYST', 7566,
TO_DATE('3-DEZ-1981', 'DD-MON-YYYY'), 3000, NULL, 20);
INSERT INTO EMP VALUES
(7934, 'MILLER', 'CLERK', 7782,
TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10);

2. package Spec:

create or replace
package test_cursor as 

  --Type for the returncode of the function
  TYPE typ_emp IS TABLE OF emp%rowtype;

  --Array for fetching, of course also possible in the body
  t_emp typ_emp;

  --function wich returns the array from fetching the cursor
  function get_emp return typ_emp;

  --function for manupilation data retrieved by the function
  PROCEDURE man_emp;

end test_cursor;

3. package body

create or replace
package body test_cursor as

  FUNCTION get_emp RETURN typ_emp AS

  cursor c_emp is select * from emp;

  BEGIN
    open c_emp;

    fetch c_emp BULK COLLECT INTO t_emp;

    CLOSE c_emp;

    --t_emp returns the whole table set from emp
    return t_emp;
  end get_emp;

  PROCEDURE man_emp AS
  --just for not confusing names, is the same as t_emp of course
  v_emp_array typ_emp;

  BEGIN
    --call the function and retrieve the whole data set
    v_emp_array := get_emp;

    --now manipulate the data, in this case just write the names to the calling client
    FOR rec IN v_emp_array.FIRST .. v_emp_array.LAST
    loop
      dbms_output.put_line(v_emp_array(rec).ename);
    end loop;

  end man_emp;

end test_cursor;

4. the procedure call

SET serveroutput ON
exec test_cursor.man_emp;

5. and here's the result:

anonymer Block abgeschlossen
SMITH
ALLEN
WARD
JONES
MARTIN
BLAKE
CLARK
SCOTT
KING
TURNER
ADAMS
JAMES
FORD
MILLER

Please be aware, it's just for demonstration purposes, of course, it makes no sense to display names in this way. But how to call a function return tables with sets of data recovery of the sliders is shown here.

HTH

Joerg

Tags: Database

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