Question

我正在尝试为更新查询创建一个mysql触发器。在这里，我使用单独的更新查询来进行用户更改。

1. personal details
2. address details
3. contact details

所以我需要创建一个触发器来用于所有上述更改。

这是我尝试的方式：

CREATE TRIGGER log_change
    AFTER UPDATE ON users 
    FOR EACH ROW
    INSERT INTO access_log (id,action,previous_data,current_data)
    VALUES (
    NEW.user_id,
    CASE
        WHEN (NEW.address <> OLD.address) OR
                 (NEW.city_id <> OLD.city_id)
            THEN 'Beneficiary address details'
        WHEN (NEW.email <> OLD.email) OR 
                 (NEW.telephone <> OLD.telephone) OR 
                 (NEW.mobile <> OLD.mobile) 
            THEN 'Beneficiary contact details'
            ELSE 'Beneficiary personal details'
            END,    
        CONCAT_WS("<br>\n"
            , IF(OLD.title<>NEW.title, CONCAT('Title: ',OLD.title), NULL)
            , IF(OLD.beneficiary_name<>NEW.name, CONCAT('Beneficiary Name: ', OLD.name), NULL)
            , IF(OLD.gender<>NEW.gender, CONCAT('Gender: ',OLD.gender), NULL)
        ),
        CONCAT_WS("<br>\n" 
            , IF(OLD.title<>NEW.title, CONCAT('Title: ',NEW.title), NULL)
            , IF(OLD.beneficiary_name<>NEW.name, CONCAT('Beneficiary Name: ', NEW.name), NULL)
            , IF(OLD.gender<>NEW.gender, CONCAT('Gender: ', NEW.gender), NULL)
        ),
        CONCAT_WS(', ', OLD.address, OLD.city_id),
        CONCAT_WS(', ', NEW.address, NEW.city_id)
);

我的问题是触发器正在创建，但是inser查询无效。这意味着在更新查询运行后，数据不会插入access_log表。

希望有人可以帮助我。

Answer 1

void

这一行包含4个字段在下面你提供6

更新后的Mysql触发器问题

1 个答案: