create temporary table if not exists tt(id int, field text);-- создаем тип
do
$dd$
declare 
	
	_arr tt[];
begin
	_arr := array_agg((foo.*)::tt) FROM (values(0,' 0 '),(1,' 1 '),(2,' 2 ')) AS foo(id,field);
	raise notice '_arr: % ' ,_arr;
	for i in 1..3 loop
		raise notice '%,%,%' ,_arr[i],(_arr[i]).id ,(_arr[i]).field;
	end loop;
end;
$dd$;