load 'plpgsql';
load 'plpgsql_check';

set plpgsql_check.mode = 'every_start';

create or replace function f1()
returns void as $$
begin
  if false then
    raise notice '%', 1, 2;
  end if;
end;
$$ language plpgsql;

select f1();

drop function f1();

create or replace function f1()
returns void as $$
begin
  if false then
    raise notice '% %';
  end if;
end;
$$ language plpgsql;

select f1();

drop function f1();