--
-- util__get_default/2
--
create or replace function util__get_default(
  p_table_name text,
  p_column text
) returns character_data as $$

BEGIN
      return (
        select column_default
          from information_schema.columns
         where table_name  = lower(p_table_name)
           and column_name = lower(p_column));
END;
$$ language plpgsql;