plsql - PS/SQL dereference from nested table -


i got nested table reference other object:

tables:

create type towar object (   towar_id integer,   nazwa varchar2(64),   cena decimal(6,2) );  create table towar_tab of towar;  create or replace type towar_zamowienie object (   ilosc integer,   produkt ref towar ); create type towar_zamowienie_tab table of towar_zamowienie;  create table zamowienie_tab (   id_zamowienie integer primary key,   klient ref klient,   towary towar_zamowienie_tab ) nested table towary store zamowienie_towar_nested;

procedure:

declare   cursor zamowienia     select deref(klient) k, id_zamowienie id_zam, towary zamowienie_tab;   integer;   tow towar; begin   r in zamowienia loop     dbms_output.put_line(r.id_zam);     in 1 .. r.towary.count loop       --select (deref(v)) tow r.towary(i) v;       dbms_output.put_line('   '||i||'. ['||r.towary(i).ilosc||'] ' || tow.nazwa);     end loop;   end loop;   null; end;

now in r.towary have nested table produkt ref towar , want print field nazwa. commented line doesn't work, says 'sql command not ended' , have dereference it. make relation, have use objects , references.

replace line

select (deref(v)) tow r.towary(i) v;

with

select deref(r.towary(i).produkt) tow dual;

r.towary(i) isn't table can't select it. furthermore, tow has type towar, , r.towary(i) towar_zamowienie, assume want access produkt attribute.


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