Problem in opening a ref cursor.

Question

Hi,
I'm getting the following error when i'm trying to open the ref cursor. PL/SQL: ORA-22905: cannot access rows from a non-nested table item
What i'm trying to do is I'm dumping the data into pl/sql table and i want retrieving the by using a ref cursor. Please see the code and help me out.
CREATE OR REPLACE PACKAGE CPS_RECR.pg_pool_status AS
  TYPE pool_rec IS RECORD (
   status  varchar2(50)
  ,stsno number
  ,stscode varchar2(5)
  ,candidatename varchar2(200)
  ,monyear varchar2(10)
  ,yyyymm number
  ,stscnt number
  --type rec_sts_tab is table of number ;--index by pls_integer;
  type pool_tab IS table of pool_rec index by binary_integer;
  type pool_cv is REF CURSOR return pool_rec;
FUNCTION pool_status_query(p_start_date in date,p_end_date in  date,p_invitedtopoolbit  in number,p_showedForPoolBit in  number)
   RETURN pool_tab;--pool_cv ;
  cursor cur_pool(p_start_date date,p_end_date date,p_invitedtopoolbit number,p_showedForPoolBit number)
  is
     SELECT   distinct to_char(date1,'yyyymm')yearmonth
              FROM acs100data a,
                 acs100_candidate_verification b,                
                 acs100_candidate_pool d
             WHERE UPPER (a.basic_email) = UPPER (b.email)
             AND (b.candidate_status IN ('FORL', 'FWRT') or BITAND (b.candidate_status_bit, 4 ) > 0
              or BITAND (b.candidate_status_bit, 2) > 0)                         
             AND d.pool_id = b.pool_id
             AND pool_date BETWEEN p_start_date AND p_end_date
             AND is_tentative_date IS NULL  ;
  cursor cur_name(p_yyyymm varchar2,p_cond number,p_start_date date,p_end_date date)
  is
  select *
  from (select distinct (case
                            when p_cond = 0 and b.candidate_status = 'FORL'
                               then (last_name || first_name)
                            when p_cond = 1 and b.candidate_status = 'FWRT'
                               then (last_name || first_name)
                            when p_cond = 2
                            and bitand (b.candidate_status_bit, p_cond) > 0
                               then (last_name || first_name)
                            when p_cond = 4
                            and bitand (b.candidate_status_bit, p_cond) > 0
                               then (last_name || first_name)
                         end
                        ) candidatename
                   from acs100data a,
                        acs100_candidate_verification b,
                        acs100_candidate_pool d
                  where upper (a.basic_email) = upper (b.email)
                    and d.pool_id = b.pool_id
                    and pool_date between p_start_date and p_end_date
                    and to_char (date1, 'yyyymm') = p_yyyymm
                    and is_tentative_date is null)
where candidatename is not null;  
END pg_pool_status;
CREATE OR REPLACE PACKAGE BODY CPS_RECR.pg_pool_status
AS
   FUNCTION pool_status_query (
      p_start_date         IN   DATE,
      p_end_date           IN   DATE,
      p_invitedtopoolbit   IN   NUMBER,
      p_showedforpoolbit   IN   NUMBER
      RETURN pool_tab--pool_cv
   IS
      tab_pool    pool_tab;
      temp_rf    pool_cv;
      n_index     NUMBER         := 1;
      --rec_sts_data  rec_sts_tab;
      n_stscnt    NUMBER;
      vc_status   VARCHAR2 (100);
      vc_label  varchar2(1000);
      vc_name  varchar2(100);
   BEGIN
      tab_pool.DELETE;
      vc_label :='Opening Pool cursor';
      FOR rec_pool IN cur_pool (p_start_date,
                                p_end_date,
                                p_invitedtopoolbit,
                                p_showedforpoolbit
      LOOP
          if cur_pool%notfound then
            exit;
          end if;
         vc_label :='Opening p_cond cursor';
         FOR p_cond IN 0 .. 3
         LOOP
            n_stscnt := 0;
            vc_status := NULL;
            begin
                SELECT   SUM
                            (NVL
                                (COUNT
                                    (CASE
                                        WHEN p_cond = 0
                                        AND b.candidate_status = 'FORL'
                                           THEN (last_name || first_name)
                                        WHEN p_cond = 1
                                        AND b.candidate_status = 'FWRT'
                                           THEN (last_name || first_name)
                                        WHEN p_cond = 2
                                        AND BITAND (b.candidate_status_bit,
                                                    p_cond) > 0
                                           THEN (last_name || first_name)
                                        WHEN p_cond = 4
                                        AND BITAND (b.candidate_status_bit,
                                                    p_cond) > 0
                                           THEN (last_name || first_name)
                                     END
                                 0
                            ) cnt,
                         DECODE (p_cond,
                                 0, 'FAILED WRITTEN TEST',
                                 1, 'FAILED **** TEST',
                                 2, 'Invited for Pool',
                                 4, 'Showed up for Pool'
                                ) status
                    INTO n_stscnt,
                         vc_status
                    FROM acs100data a,
                         acs100_candidate_verification b,
                         acs100_candidate_pool d
                   WHERE UPPER (a.basic_email) = UPPER (b.email)
                     AND d.pool_id = b.pool_id
                     AND pool_date BETWEEN p_start_date AND p_end_date
                     AND TO_CHAR (date1, 'yyyymm') = rec_pool.yearmonth
                     AND is_tentative_date IS NULL
                GROUP BY candidate_status,
                         b.candidate_status_bit,
                         DECODE (p_cond,
                                 0, 'FAILED WRITTEN TEST',
                                 1, 'FAILED **** TEST',
                                 2, 'Invited for Pool',
                                 4, 'Showed up for Pool'
              exception
                 when no_data_found
                 then
                    n_stscnt :=0;
                    vc_status :=null;
             end;
            vc_label :='Opening name cursor';         
            FOR rec_name IN cur_name (rec_pool.yearmonth,
                                      p_cond,
                                      p_start_date,
                                      p_end_date
            LOOP
               if cur_name%notfound then
               exit;
               end if;
               tab_pool (n_index).yyyymm := rec_pool.yearmonth;
               tab_pool (n_index).stscnt := n_stscnt;
               tab_pool (n_index).status := vc_status;
               tab_pool (n_index).candidatename := rec_name.candidatename;
               dbms_output.put_line('tab_pool(n_index).yyyymm  : '||tab_pool(n_index).yyyymm);
               dbms_output.put_line('tab_pool(n_index).stscnt : '||tab_pool(n_index).stscnt);
               dbms_output.put_line('tab_pool(n_index).status : '||tab_pool(n_index).status);
               dbms_output.put_line('tab_pool(n_index).candidatename : '||tab_pool(n_index).candidatename);
               vc_name :=rec_name.candidatename;
            END LOOP;
            n_index := n_index + 1;
         END LOOP;
      END LOOP;      
      RETURN tab_pool;
   exception
     when others
     then
         dbms_output.put_line('error :'||vc_label||'--'||  vc_name); 
   END;
END pg_pool_status;
---run script
DECLARE
  RetVal CPS_RECR.PG_POOL_STATUS.pool_tab;
  P_START_DATE DATE;
  P_END_DATE DATE;
  P_INVITEDTOPOOLBIT NUMBER;
  P_SHOWEDFORPOOLBIT NUMBER;
temp_cv CPS_RECR.PG_POOL_STATUS.pool_cv;
BEGIN
  P_START_DATE := to_date('09/01/2008','mm/dd/yyyy');
  P_END_DATE := to_date('09/30/2008','mm/dd/yyyy');
  P_INVITEDTOPOOLBIT := 2;
  P_SHOWEDFORPOOLBIT := 4;
  open temp_cv for select * from  table((CPS_RECR.PG_POOL_STATUS.POOL_STATUS_QUERY ( P_START_DATE, P_END_DATE, P_INVITEDTOPOOLBIT, P_SHOWEDFORPOOLBIT )) );
  end loop;
exception
   when others
   then
      dbms_output.put_line(sqlerrm);
END;

Answer 1

Satyaki,
It doesn't help me out. I'm worndering one of code sample is working fine. i didn't my current is giving the problem.
FYI, please see the some code i followed.
SQL> Create or replace PACKAGE cv IS
  2     type comp_rec is RECORD
  3               (deptno number,
  4                ename  varchar(10),
  5                compensation number);
  6     type comp_tbl IS table of comp_rec;
  7     function get_coll return comp_tbl pipelined;
  8     temp_tbl comp_tbl := comp_tbl();
  9     type comp_cv is REF CURSOR return comp_rec;
10  end;
11  /
Package created.
SQL> Create or replace PACKAGE body cv IS
  2     function get_coll return comp_tbl pipelined
  3     is
  4     begin
  5      for i in 1..temp_tbl.count loop
  6       pipe row(temp_tbl(i));
  7      end loop;
  8      return;
  9     end;
10  end;
11  /
Package body created.
SQL> declare
  2     temp_cv cv.comp_cv;
  3     rc cv.comp_rec;
  4  begin
  5           cv.temp_tbl.delete;
  6           cv.temp_tbl.extend;
  7    cv.temp_tbl(1).deptno:=10;
  8    cv.temp_tbl(1).ename:='1223';
  9    cv.temp_tbl(1).compensation:=10;
10  
11          -- erroring out
12   open temp_cv for select * from  table(cv.get_coll);
13          fetch temp_cv into rc;
14          dbms_output.put_line('Deptno is ' || rc.deptno);
15          dbms_output.put_line('ename is ' || rc.ename);
16  end;
17  /
Deptno is 10
ename is 1223
PL/SQL procedure successfully completed.