在PhpMyAdmin中創建觸發器會導致語法錯誤

Question

我試圖創建一個觸發器，在布爾型字段驗證後插入表中。這裏是我的代碼：

DROP TRIGGER IF EXISTS user_au_trg; 

DELIMITER $$ 
CREATE OR REPLACE TRIGGER user_au_trg 
    AFTER UPDATE ON users 
    FOR EACH ROW 
    BEGIN 
    IF NEW.UserNameVerified = '1' 
    INSERT INTO changeLog(logId,userId,logDate, theLog) VALUES (null, new.UserId, NOW(), 'User Has Now Been Verified') 
    END IF 
    END $$ 
DELIMITER ; 

每當我嘗試運行此，我得到一個語法錯誤：

1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'INSERT INTO changeLog(logId,userId,logDate, theLog) VALUES (null, new.UserId, NO' at line 6

我在做什麼錯誤是造成這個錯誤？

Answer 1

有一些調整我會讓一些只是個人偏好。該代碼發佈如下。然而，主要問題是：

1. 格式不正確IF語句，它需要的是 -

   IF [表達式] THEN [IF TRUE] ELSE [IF FALSE。

2. 在插入語句後和結束 IF語句後缺少終止符。

DROP TRIGGER IF EXISTS user_au_trg; 
    DELIMITER ;; 

    CREATE OR REPLACE TRIGGER user_au_trg 
     AFTER UPDATE ON users 
     FOR EACH ROW 
     BEGIN 
     IF NEW.UserNameVerified = '1' THEN 
     INSERT INTO changeLog(logId,userId,logDate, theLog) VALUES (null, new.UserId, NOW(), 'User Has Now Been Verified'); 
     END IF; 
     END ;; 
    DELIMITER ; 

希望這有助於