ORACLE use custom tableObject into a function - oracle

Question

I want insert a cursor into my custom tableObject, but it is not always found.
My RECORD:
create or replace type "RECORDRANKING" as object
(
-- Attributes
COL1 NUMBER,
COL2 VARCHAR(50),
COL3 NUMBER
-- Member functions and procedures
-- member procedure <ProcedureName>(<Parameter> <Datatype>)
)
This is object table:
CREATE OR REPLACE TYPE "TBRANKING" AS TABLE OF RECORDRANKING;
Now I go into creating a function (into a package):
CREATE OR REPLACE PACKAGE BODY PKLBOTTONI as
FUNCTION testlb
(
p_gapup IN NUMBER,
p_gadown IN NUMBER
)
RETURN SYS_REFCURSOR IS
cursor_ranking SYS_REFCURSOR;
position NUMBER ;
gap_ranking TBRANKING;
gaprecord RECORDRANKING;
upgap NUMBER;
downgap NUMBER;
BEGIN
select * into cursor_ranking from(
select pkranking.getRanking( 100 ) from dual);
LOOP
FETCH cursor_ranking INTO gap_ranking;
EXIT WHEN cursor_ranking%NOTFOUND;
INSERT INTO gap_ranking (COL1,COL2,COL3)
VALUES
(cursor_ranking.C1,
cursor_ranking.C2,
cursor_ranking.C3);
END LOOP;
return gap_ranking;
END;
END PKLBOTTONI;
I always get:
Compilation errors for PACKAGE BODY PKLBOTTONI
Error: PL/SQL: ORA-00942: table or view does not exist
Line: 32
Text: INSERT INTO gap_ranking

Answer 1

In the loop you're both fetching into "gap_ranking" and then trying to "insert into" it again. Insert into a collection is not a valid syntax. Fetch is ok, either in a loop or using bulk collect to fetch multiple records at once.
From your excerpt it doesn't look like you have a physical database table, so the way to do it in PL/SQL would be something like below.
For more help using collections you can check Oracle docs below too:
http://docs.oracle.com/cd/B28359_01/appdev.111/b28370/collections.htm
SQL> set serveroutput on
SQL> declare
2 gap_ranking tbranking := tbranking(null); -- initialize
3 begin
4 gap_ranking.delete; -- clear empty record
5 for cur in
6 (select level as i from dual connect by level <= 5)
7 loop
8 -- insert empty
9 gap_ranking.extend;
10 -- attribute values
11 gap_ranking(gap_ranking.last) := recordranking(1000 + cur.i, 'TEST' || cur.i, 10 + cur.i);
12 end loop;
13 -- loop to print - just to illustrate
14 for j in gap_ranking.first .. gap_ranking.last
15 loop
16 dbms_output.put_line(gap_ranking(j).col1 || ',' ||
17 gap_ranking(j).col2 || ',' ||
18 gap_ranking(j).col3);
19
20 end loop;
21 -- same as...
22 for j in 1 .. gap_ranking.count
23 loop
24 dbms_output.put_line(gap_ranking(j).col1 || ',' ||
25 gap_ranking(j).col2 || ',' ||
26 gap_ranking(j).col3);
27
28 end loop;
29 end;
30 /
1001,TEST1,11
1002,TEST2,12
1003,TEST3,13
1004,TEST4,14
1005,TEST5,15
1001,TEST1,11
1002,TEST2,12
1003,TEST3,13
1004,TEST4,14
1005,TEST5,15
PL/SQL procedure successfully completed
SQL>