brugerdefineret type som inputparametre i PostgreSQL-funktionen

For at kalde funktionen fra en SQL-forespørgsel skal du caste parametrene til din brugerdefinerede type som i følgende eksempel.

select form_insertion(array[
    cast(row('Form 1', 1, current_date, 1, current_date, 'This is form 1', 
        array[
            cast(row('section-1', 'Section One', 1) as section),
            cast(row('section-2', 'Section Two', 2) as section),
            cast(row('section-3', 'Section Three', 3) as section)
        ]
    ) as form_details),
    cast(row('Form 2', 2, current_date, 1, current_date, 'This is form 2', 
        array[
            cast(row('section-2', 'Section Two', 2) as section),
            cast(row('section-3', 'Section Three', 3) as section)
        ]
    ) as form_details),
    cast(row('Form 3', 1, current_date, 1, current_date, 'This is form 3', 
        array[
            cast(row('section-1', 'Section One', 1) as section),
            cast(row('section-3', 'Section Three', 3) as section)
        ]
    ) as form_details)
])

Bemærk, at PostgreSQL-arrays ikke har en .COUNT-egenskab. Du kan iterere gennem et array efter indeksområde med array_upper funktion:

for i IN 1..array_upper(formdetails, 1)
LOOP 
   -- your code here
END LOOP;

Siden PostgreSQL 9.1 kan du bruge FOREACH-sætningen til at gå gennem arrayet:

create or replace function form_insertion(formdetails form_details[])
    returns varchar as $$
declare
    detail form_details;
    sec section;
begin
    foreach detail in array formdetails
    LOOP 
       RAISE NOTICE '%', detail.formName;

       foreach sec in array detail.sections
       LOOP
         raise NOTICE '%', sec.sectionName;
       END LOOP;
    END LOOP;
    return '';
end;$$
    language plpgsql;