--
-- content_folder__is_root/1
--
create or replace function content_folder__is_root(
  integer
) returns bool as $$

declare
  is_root__folder_id              alias for $1;  
  v_is_root                       boolean;       
begin

  select parent_id = -4 into v_is_root 
    from cr_items where item_id = is_root__folder_id;

  return v_is_root;
 
end;$$ language plpgsql;