Du kan inspektera typen av ett objekt med sys.anydata
:
create or replace function which_type
( p_fv fv )
return varchar2
as
begin
return sys.anydata.gettypename(sys.anydata.convertobject(p_fv));
end which_type;
Testa:
create or replace type number_array as table of number;
create or replace type integer_array as table of integer;
create or replace type fv as object (
idno number)
not final;
/
create type fv_integer under fv (
features integer_array)
not final;
/
create type fv_number under fv (
features number_array)
not final;
/
create table fv_test (my_fv fv);
insert into fv_test values (fv(1));
insert into fv_test values (fv_integer(1, integer_array(1)));
insert into fv_test values (fv_number(1, number_array(1)));
select which_type(my_fv) from fv_test;
WHICH_TYPE(MY_FV)
-------------------------
WILLIAM.FV
WILLIAM.FV_INTEGER
WILLIAM.FV_NUMBER
3 rows selected.