-- -- 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;