Pipelined function in package example 11g

Question

Hi all,
could you please show me example of using pipelined function in package with my sample data?
My need is to return the following data using pipelined function in package:
select 1 as t, 2 as y, 'u' as j, trunc(sysdate-1) as k from dual union all
select 3 as t, 4 as y, 'h' as j, trunc(sysdate-2) as k from dual Thanks ahead.

Answer 1

p.s. if your problem is that you're not sure how to pipe multiple columns, take a look at this example (from my library of standard examples)...
SQL> CREATE OR REPLACE TYPE myemp AS OBJECT
  2  ( empno    number,
  3    ename    varchar2(10),
  4    job      varchar2(10),
  5    mgr      number,
  6    hiredate date,
  7    sal      number,
  8    comm     number,
  9    deptno   number
10  )
11  /
Type created.
SQL> CREATE OR REPLACE TYPE myrectable AS TABLE OF myemp
  2  /
Type created.
SQL> CREATE OR REPLACE FUNCTION pipedata(p_min_row number, p_max_row number) RETURN myrectable PIPELINED IS
  2    v_obj myemp := myemp(NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
  3  BEGIN
  4    FOR e IN (select *
  5              from (
  6                    select e.*
  7                          ,rownum rn
  8                    from (select * from emp order by empno) e
  9                   )
10              where rn between p_min_row and p_max_row)
11    LOOP
12      v_obj.empno    := e.empno;
13      v_obj.ename    := e.ename;
14      v_obj.job      := e.job;
15      v_obj.mgr      := e.mgr;
16      v_obj.hiredate := e.hiredate;
17      v_obj.sal      := e.sal;
18      v_obj.comm     := e.comm;
19      v_obj.deptno   := e.deptno;
20      PIPE ROW (v_obj);
21    END LOOP;
22    RETURN;
23  END;
24  /
Function created.
SQL> select * from table(pipedata(1,5));
     EMPNO ENAME      JOB               MGR HIREDATE                    SAL       COMM     DEPTNO
      7369 SMITH      CLERK            7902 17-DEC-1980 00:00:00        800                    20
      7499 ALLEN      SALESMAN         7698 20-FEB-1981 00:00:00       1600        300         30
      7521 WARD       SALESMAN         7698 22-FEB-1981 00:00:00       1250        500         30
      7566 JONES      MANAGER          7839 02-APR-1981 00:00:00       2975                    20
      7654 MARTIN     SALESMAN         7698 28-SEP-1981 00:00:00       1250       1400         30
SQL> select * from table(pipedata(6,10));
     EMPNO ENAME      JOB               MGR HIREDATE                    SAL       COMM     DEPTNO
      7698 BLAKE      MANAGER          7839 01-MAY-1981 00:00:00       2850                    30
      7782 CLARK      MANAGER          7839 09-JUN-1981 00:00:00       2450                    10
      7788 SCOTT      ANALYST          7566 19-APR-1987 00:00:00       3000                    20
      7839 KING       PRESIDENT             17-NOV-1981 00:00:00       5000                    10
      7844 TURNER     SALESMAN         7698 08-SEP-1981 00:00:00       1500          0         30
SQL> select * from table(pipedata(11,15));
     EMPNO ENAME      JOB               MGR HIREDATE                    SAL       COMM     DEPTNO
      7876 ADAMS      CLERK            7788 23-MAY-1987 00:00:00       1100                    20
      7900 JAMES      CLERK            7698 03-DEC-1981 00:00:00        950                    30
      7902 FORD       ANALYST          7566 03-DEC-1981 00:00:00       3000                    20
      7934 MILLER     CLERK            7782 23-JAN-1982 00:00:00       1300                    10
SQL>