Item Query From Table and Send It To Procedure - oracle

Question

Note
I want to query page item name and send the corresponding items value into a procedure. I can get the item name but couldn't get the value of it. At first I use the following code:
begin
for j in (select item_name from UTLITMINF where service_id ='abc' ) loop
val := val || ':' || j.item_name; --items name
END LOOP;
/* exe := ' begin
dynamic_api_call(p_service => :ser,
p_par => :v_val, --items value to need to send
o_result_json => :v_l_response_text);
end; ';
execute immediate exe
using IN ser,
in val,
out l_response_text;*/
begin
dynamic_api_call(p_service => 'abc',
p_par => val, --items name from page queried from table and send its value to procedure
o_result_json => l_response_text);
end;
raise_application_error(-20001,l_response_text);
end;
In val parameter it contains P11_CUSTOMER. But the value of it did not pass through the procedure. How can I get the value of it? Suggest me if i need to improve my code.

Answer 1

You can use the V (short for value) and NV (short for numeric value) function for dynamic item names. Try something like this (you'll need to adjust on your end).
declare
l_response_text varchar2(255);
l_ser varchar2(255) := 'abc';
l_item_name varchar2(255);
begin
select item_name
into l_item_name
from UTLITMINF
where service_id = l_ser;
dynamic_api_call(
p_service => l_ser,
p_par => v(l_item_name),
o_result_json => l_response_text
);
end;

Answer 2

Try the dynamic sql like the below
begin
for j in (select item_name from UTLITMINF where service_id ='abc' ) loop
val := val || ':' || j.item_name; --items name
END LOOP;
exe := ' begin
dynamic_api_call(p_service => :ser,
p_par => :v_val, --items value to need to send
o_result_json => :v_l_response_text);
end ;';
execute immediate exe
using ser,
val,
OUT l_response_text;
raise_application_error(-20001,l_response_text);