DROP PROCEDURE IF EXISTS `writeoff_day` ;;
CREATE PROCEDURE `sumstats_month`()
BEGIN
    DECLARE user_id, tariff_id, b INT;
    DECLARE tariff_perday DOUBLE;

    DECLARE cur_u CURSOR FOR SELECT id, tariffid FROM users;
    DECLARE CONTINUE HANDLER FOR NOT FOUND
        SET b=1;
    OPEN cur_u;
    REPEAT
        FETCH cur_u INTO user_id, tariff_id;
        DECLARE cur_t CURSOR FOR SELECT perday FROM tariffs WHERE id=tariff_id;
        OPEN cur_t;
        FETCH cur_t INTO tariff_perday;
        UPDATE users SET balance=balance-tariff_perday WHERE id=user_id;
        UNTIL b=1
    END REPEAT;

    UPDATE tariffs SET last_writeoff_day=now();
END ;;



ERROR 1064 (42000) at line 201: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DECLARE cur_t CURSOR FOR SELECT perday FROM tariffs WHERE id=tariff_id;
                OPEN c' at line 11