SQL 触发器不起作用(根据时间表)

SQL Trigger doesn't work (based on schedule)

我想创建一个触发器,允许插入在工作时间(周一至周五上午 9 点至下午 5 点)执行。我目前有这个

CREATE DEFINER=`root`@`localhost` TRIGGER `noWorkHour` 
BEFORE INSERT ON `empleado` FOR EACH ROW 
BEGIN

  IF DAYOFWEEK(NOW()) BETWEEN (2, 6) 
  AND CURTIME() BETWEEN '09:00:00' AND '17:00:00' 
  THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Solo se pueden ingresar en horario de trabajo';
  END IF;
END

但是当我尝试插入一些东西时,它显示:

/* Error de SQL (1241): Operand should contain 1 column(s) */
/* Affected rows: 0  Filas encontradas: 0  Advertencias: 0  Duración para 0 of 1 query: 0,000 sec. */

我为此使用 MariaDB。

@mustaccio 发表评论后,我在搞乱其他事情,而不是触发器本身。

触发器如下:

CREATE DEFINER=`root`@`localhost` TRIGGER `noWorkHour` BEFORE INSERT ON `empleado` FOR EACH ROW BEGIN


IF DAYOFWEEK(NOW()) NOT BETWEEN 2 AND 6 AND CURTIME() NOT BETWEEN '09:00:00' AND '16:00:00' THEN
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Solo se pueden ingresar en horario de trabajo';

END IF;
END