Copy nested table's values in another tuple of same table - oracle11g

Question

I have the following table in oracle 11g named parlamentari:
cf varchar(16)
nome varchar(20)
cognome varchar(20)
telefoni telefoni_NT
where telefoni_NT is a nested table of varchar2.
Now, I must to copyed the elements of the nested table of a tuple (sorgente) in another tuple (ricevente).
I try to write an example
Start situation
parlamentari
-------------------------------------
cf | nome | cognome | telefoni
-------------------------------------
1 | a | aa | VARCHAR(222,444)
2 | b | bb | VARCHAR(111)
Situation after procedure called
parlamentari
-------------------------------------
cf | nome | cognome | telefoni
-------------------------------------
1 | a | aa | VARCHAR(222,444)
2 | b | bb | VARCHAR(111, 222, 444)
I tried to written this procedure without success
create or replace procedure copia_telefoni2
(sorgente in parlamento2018.parlamentari.cf%type,
ricevente in parlamento2018.parlamentari.cf%type) as
cursor cur_out_tel is
select column_value as original_list
from parlamentari, table(telefoni)
where cf = sorgente
;
cursor in_parlamentare is
select column_value as copied_list
from parlamentari, table(telefoni)
where cf = destinazione;
begin
if (sorgente <> destinazione) then
for i in cur_out_tel loop
dbms_output.put_line(i.original_list);
insert into table(select telefoni from parlamentari where cf=destinazione) values (telefoni_nt(i.original_list));
end loop;
else
dbms_output.put_line('Errore! Sorgente e destinazione uguali');
end if;
end copia_telefoni2;

Answer 1

Copy nested table's values in another tuple of same table
As far i could understand your requirement, you don't need to insert in the table since the record already exists in your table. All you need is to update the existing record. Since your table column is a nested table,MULTISET UNION is something which would work in your situation. See below demo:
Tables:
CREATE OR REPLACE TYPE telefoni_nt IS TABLE OF VARCHAR2(100);
CREATE TABLE parlamentari (
cf VARCHAR(16),
nome VARCHAR(20),
cognome VARCHAR(20),
telefoni telefoni_nt
)
NESTED TABLE telefoni STORE AS nested_telefoni;
insert into parlamentari values('1','a','aa',telefoni_nt('VARCHAR(222,444)'));
insert into parlamentari values('2','b','bb',telefoni_nt('VARCHAR(111)'));
Output:
SQL> Select CF ,TELEFONI from parlamentari;
CF TELEFONI
-- ------
1 TELEFONI_NT('VARCHAR(222,444)')
2 TELEFONI_NT('VARCHAR(111)')
Procedure:
CREATE OR REPLACE PROCEDURE copia_telefoni2 (
sorgente IN parlamentari.cf%TYPE,
destinazione IN parlamentari.cf%TYPE
) AS
BEGIN
IF ( sorgente <> destinazione )
THEN
--Using MULTISET Operator to merge the destination column element with the source column elements.
UPDATE parlamentari
SET
telefoni = telefoni MULTISET UNION (SELECT telefoni
FROM parlamentari
WHERE cf = sorgente )
WHERE
cf = destinazione;
ELSE
dbms_output.put_line('Errore! Sorgente e destinazione uguali');
END IF;
COMMIT;
END copia_telefoni2;
/
Execution:
SQL> EXEC copia_telefoni2('1','2');
PL/SQL procedure successfully completed.
Result:
SQL> Select CF ,TELEFONI from parlamentari;
CF TELEFONI
-- ------
1 TELEFONI_NT('VARCHAR(222,444)')
2 TELEFONI_NT('VARCHAR(111)','VARCHAR(222,444)')
So you can see in the result that the two rows now have been merged.