CREATE OR REPLACE FUNCTION public.search_inventory (search text)
	RETURNS SETOF inventory
	LANGUAGE plpgsql
	STABLE
	AS $function$
BEGIN
	IF search = '' THEN
		RETURN query
		SELECT
			*
		FROM
			inventory;
	ELSE
		RETURN query
		SELECT
			*
		FROM
			inventory i,
			billlines bl,
			bills b,
			vendors v
		WHERE
			i.billlineid = bl.id
			AND bl.billid = b.id
			AND b.vendorid = v.id
			AND i.line_desc ILIKE '%' || search || '%'
			OR b.invoice_number ILIKE '%' || search || '%'
			OR v.name ILIKE '%' || search || '%'
		ORDER BY
			i.line_desc ILIKE '%' || search || '%'
			OR NULL,
			b.invoice_number ILIKE '%' || search || '%'
			OR NULL,
			v.name ILIKE '%' || search || '%'
			OR NULL;
	END IF;
END
$function$;