postgres inline function

```pl/pgsql
do $$
declare
    item text;
BEGIN
    DELETE FROM table_realtion
    WHERE rel1 = 2;
    
    FOREACH item IN ARRAY string_to_array('1#2#5#', '#')
    LOOP
        RAISE INFO '%', pg_typeof(item);
        if item <> '' then
            INSERT INTO table_realtion (rel1_id, rel1_id)
            VALUES (2, item::int); -- или: ... , CAST(item AS integer);
        end if;  
    END LOOP;
end;
$$
language plpgsql;
```