Technical justification.
GlideappVariablePoolQuestionSet() : when you will run this function and pass the request sys_id in set.setRequestID() then it will not be able to fetch the variables because when you submit the catalog form using "order now" and workflow associated with ritm or request, it link the variables on ritm end .
Now giving you another example for GlideappSequencedQuestionSet() , example you have a record producer on incident table then this will give you the variable details
or if you have record producer on sc_request table then this scenario it will show the record.
Script which you can run at your end using background script to test the result.
var gr = new GlideRecord('task');
gr.get('1e70eacf2f34a8d0f68d5ff62799b687'); // Add your sys_id of record
// Catalog Form
var set = new GlideappVariablePoolQuestionSet();
set.setRequestID(gr.sys_id);
set.load();
var vs = set.getFlatQuestions();
for (var i = 0; i < vs.size(); i++) {
if (vs.get(i).getDisplayValue() != '' && +vs.get(i).getLabel() != '') {
gs.print("Catalog form "+ '<b>' +vs.get(i).getLabel() + " = " + '</b>' + vs.get(i).getDisplayValue() + "\n");
}
}
// Record Producer
var set = new GlideappSequencedQuestionSet();
set.setTableName('sc_request');
set.setTableSysID(gr.sys_id);
set.load();
var vs = set.getFlatQuestions();
for (var i=0; i < vs.size(); i++) {
gs.print('Record Producer + vs.get(i).getLabel() + " = "+ vs.get(i).getDisplayValue() + "<br />");
}
Test result. I have considered both scenario ( created request using catalog form as well as Record Producer.)
