Refer Multiset Union value from cursor

Question

Hi everyone,
I am new to the concept of pseudo functiona and was just trying to use the multiset union function. I have written a cursor which gives me a column 'buyer' and a corresponding dataset. Now my dilemna is how to refer the elements in the dataset using the cursor. Could anyone please help?
CREATE TABLE BUYER
  BUYER        NUMBER(4)                        NOT NULL,
  BUYER_NAME   VARCHAR2(120 BYTE)               NOT NULL,
  BUYER_PHONE  VARCHAR2(20 BYTE),
  BUYER_FAX    VARCHAR2(20 BYTE)
SET DEFINE OFF;
Insert into RMS.BUYER
   (BUYER, BUYER_NAME, BUYER_PHONE, BUYER_FAX)
Values
   (110, 'Kendr', '5147, 876', NULL);
Insert into RMS.BUYER
   (BUYER, BUYER_NAME, BUYER_PHONE, BUYER_FAX)
Values
   (101, 'Amelie Dube', '(514),808', NULL);
Insert into RMS.BUYER
   (BUYER, BUYER_NAME, BUYER_PHONE, BUYER_FAX)
Values
   (102, 'Jennifer Baie', '51962,860', NULL);
Insert into RMS.BUYER
   (BUYER, BUYER_NAME, BUYER_PHONE, BUYER_FAX)
Values
   (103, 'Loriannstris', '5333962,785', NULL);
Insert into RMS.BUYER
   (BUYER, BUYER_NAME, BUYER_PHONE, BUYER_FAX)
Values
   (104, 'Sandra St-re', '513962,736', NULL);
COMMIT;
create or replace type tab1 is table of varchar2 (30);    
DECLARE
cursor c1 is
select buyer,
      CAST (multiset(select buyer_name from buyer where rownum<4) as tab1) as data1
      from buyer
MULTISET UNION ALL
select  buyer,
          CAST(multiset(select buyer_name from buyer where rownum<5) as tab1) as data2
from buyer;
BEGIN
  for c_rec in c1
    loop
      DBMS_OUTPUT.PUT_LINE(c_rec.buyer||'~'||c_rec.column_value(1)); --  i want to print all the values in the 'data set' along with the buyer id.
   end loop;
end;
error:
PLS-00302: component 'COLUMN_VALUE' must be declared

Answer 1

Thanks a lot for your help. Now the one i posted was just to simplify the actual problem. But let me try and give you the complete picture.
I have a nested table structure:
Table structure:
                                          ->ExtOfXOrderSkuDesc_TBL -> ExtOfOrderExpDesc_TBL    
    I_message -> ExtOfXOrderDesc_TBL
                                          ->ExtOfXOrderPackDesc_TBL -> ExtOfOrderExpDesc_TBLCould not post the whole table detail as its too big
CURSOR c_insert_item IS
   SELECT im.item,
          item_diff.import_country_id,
          item_diff.hts_no,
          item_diff.ExtOfOrderExpDesc_TBL --needs to be casted
     FROM TABLE(CAST(I_message.ExtOfXOrderDesc_TBL(1).ExtOfXOrderSkuDesc_TBL AS "RIB_ExtOfXOrderSkuDesc_TBL")) item_diff,
          item_master im
    WHERE item_diff.style_no = im.item_parent
   UNION ALL
   SELECT im.item,
          pack_diff.import_country_id,
          pack_diff.hts_no,
          pack_diff.ExtOfOrderExpDesc_TBL --needs to be casted
     FROM TABLE(CAST(I_message.ExtOfXOrderDesc_TBL(1).ExtOfXOrderPackDesc_TBL AS "RIB_ExtOfXOrderPackDesc_TBL")) pack_diff,
          item_master im
    WHERE pack_diff.style_no = im.item_parent;Now i need to make an union of all the elements including the ExtOfOrderExpDesc_TBL . So i wanted the cast it as multiset. But pardon my ignorance i feel i am lost somewhere. Based on you reply could you suggest how can i make the union and access each element using the cursor record?
Thanks