--
-- category_tree__unmap/2
--
create or replace function category_tree__unmap(
  integer,
  integer
) returns int4 as $$

declare
    p_object_id              alias for $1;
    p_tree_id                alias for $2;
begin
	delete from category_tree_map
	where object_id = p_object_id
	and tree_id = p_tree_id;
        return 0;
end;
$$ language plpgsql;