php - SQL TRIGGER phpMyAdmin - LEAVE 指令

Question

我在 phpMyAdmin 中有这个触发器

DELIMITER $$
CREATE TRIGGER `DuplicateRows` BEFORE INSERT ON `infocontacts` 
FOR EACH ROW
trig : BEGIN 
DECLARE num INTEGER DEFAULT 0;

IF( NEW.phone <> 'NULL' ) THEN
 SELECT COUNT( * ) INTO num FROM infocontacts WHERE phone = NEW.phone;
 IF( num >0 ) THEN 
  INSERT INTO duplicated( name, surname, phone, email, profession, province) 
  VALUES (NEW.name, NEW.surname, NEW.phone, NEW.email, NEW.profession, NEW.province);

  LEAVE trig;

 END IF ;
END IF ;
END

指令“LEAVE trig;” 没有执行即离开触发器并且不运行被触发的插入！

有人能帮我吗？

谢谢