MYSQl触发器创建中的语法错误

Question

这里的某处应该是语法错误，但我真的找不到一个：

DELIMITER |
CREATE TRIGGER Mieter_bi BEFORE INSERT ON Mieter FOR EACH ROW 
BEGIN 
 IF NEW.vorname = '' AND NEW.nachname = '' AND NEW.email = '' AND NEW.mieterID > 0
  THEN DELETE NEW;
 END IF;
END|

错误讯息：

#1064 - 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 '; END IF; END|' at line 4

感谢您的帮助;）

Answer 1

这是取消插入的方法

DELIMITER |
CREATE TRIGGER Mieter_bi BEFORE INSERT ON Mieter FOR EACH ROW 
BEGIN 
  IF NEW.vorname = '' AND NEW.nachname = '' AND NEW.email = '' AND NEW.mieterID > 0
  THEN 
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Any Message';
  END IF;
END|