Populate_list is not working for list item

Question

i have a list item. i have a record group with a query which will return only one column.
if i use
populate_list(list_name,'Rg_val');
Rg_val is the record group name
it says error
FRM-41334: Invalid record group for list population.
what might be the problem?

Answer 1

The record group must have at list 2 columns, one is the content of the list item(what you see in the screen) and the other is the value that the list item returns.
if you create the record group programmatically your query must have 2 columns in the select statement, the first is the visible value of the list item and the other the real value that listitem returns.
I attach the following code if you want to create the record group at runtime which is the best.
declare
additional_payments varchar2(200) := 'select codpros||' || '''. ''||' || 'description,codpros from mis_pros';
v_rg_id recordgroup;
v_err NUMBER:= 0;
BEGIN
v_rg_id := create_group_from_query('recgrp1',additional_payments);
v_err:= populate_group(v_rg_id);
clear_list('codpros');
populate_list('codpros',v_rg_id);
delete_group(v_rg_id);
clear_list('typos');
populate_list('typos','RECORD_GROUP1');
delete_group('RECORD_GROUP1');
go_block('parameters');
execute_query;
END;
Be careful so as the codpros to be VARCHAR2. the 2 columns in the select statement must be of VARCHAR2 type. Try it and it ' ll work.
If you have any question ask me again.
Regards ,
bill.