I have created a CDS Entity with option set as column data type. It is able to show all the values in model app new or edit form, but not able to add "All" to the same dropdown or combobox. If I try to add it to collection, it shows All in one column and option set values in another column.
And below code is giving error
ClearCollect(p1,{Result:"All"});
Collect(p1, Distinct('Property Inventories','Project Name'))