Oracle 一个表字段上的触发器适用于所有表字段

我有一个触发器，用于表中的几个字段。但由于某种原因，如果更改了触发器中未定义的另一个字段，则它仍会激发

CREATE OR REPLACE TRIGGER INTEGRATION_EMPLOYMENT
    AFTER UPDATE OF start_day_of_employment, end_of_employment ON hr_employment_data
    FOR EACH ROW
    DECLARE
    BEGIN
         IF UPDATING THEN
            MERGE INTO ad_integration intg USING dual ON (intg.user_id = :NEW.user_id AND intg.integrated = 'NO')
            WHEN MATCHED THEN
                UPDATE SET
                         intg.start_day_of_employment = decode(:NEW.start_day_of_employment, NULL, ' ', :NEW.start_day_of_employment),
                         intg.end_of_employment = decode(:NEW.end_of_employment, NULL, ' ', :NEW.end_of_employment),
                         intg.manager_status = :NEW.manager_status,
                         intg.pid = (SELECT pid FROM arc.user_info WHERE user_id = :NEW.user_id),
                         intg.network_access_start_date = (SELECT network_access_start_date FROM hr_extension_data WHERE user_id = :NEW.user_id)
             WHEN NOT MATCHED THEN
                INSERT (intg.user_id, intg.start_day_of_employment, intg.end_of_employment, intg.manager_status, intg.pid, intg.network_access_start_date
                VALUES (:NEW.user_id, :NEW.start_day_of_employment, :NEW.end_of_employment, :NEW.manager_status, (SELECT pid FROM arc.user_info WHERE user_id = :NEW.user_id), (SELECT network_access_start_date FROM hr_extension_data WHERE user_id = :NEW.user_id));
END IF;

END HR_ADINTEGRATION_EMPLOYMENT;

是因为我使用了双重密码还是我遗漏了什么

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干杯-

如果希望保持结构不变，并且只在指定字段更改时处理触发器，则只需快速比较新代码行7和8：

CREATE OR REPLACE TRIGGER INTEGRATION_EMPLOYMENT
AFTER UPDATE OF start_day_of_employment, end_of_employment ON hr_employment_data
FOR EACH ROW
DECLARE
BEGIN
     IF UPDATING 
        AND (:NEW.start_day_of_employment <> :OLD.start_day_of_employment
        OR   :NEW.end_of_employment <> :OLD.end_of_employment)  THEN
        MERGE INTO ad_integration intg USING dual ON (intg.user_id = :NEW.user_id AND intg.integrated = 'NO')
        WHEN MATCHED THEN
            UPDATE SET
                     intg.start_day_of_employment = decode(:NEW.start_day_of_employment, NULL, ' ', :NEW.start_day_of_employment),
                     intg.end_of_employment = decode(:NEW.end_of_employment, NULL, ' ', :NEW.end_of_employment),
                     intg.manager_status = :NEW.manager_status,
                     intg.pid = (SELECT pid FROM arc.user_info WHERE user_id = :NEW.user_id),
                     intg.network_access_start_date = (SELECT network_access_start_date FROM hr_extension_data WHERE user_id = :NEW.user_id)
         WHEN NOT MATCHED THEN
            INSERT (intg.user_id, intg.start_day_of_employment, intg.end_of_employment, intg.manager_status, intg.pid, intg.network_access_start_date
            VALUES (:NEW.user_id, :NEW.start_day_of_employment, :NEW.end_of_employment, :NEW.manager_status, (SELECT pid FROM arc.user_info WHERE user_id = :NEW.user_id), (SELECT network_access_start_date FROM hr_extension_data WHERE user_id = :NEW.user_id));
END IF;

END HR_ADINTEGRATION_EMPLOYMENT;

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可能还有另一个触发器没有指定列。您如何更新HR\U就业数据？如果您通过某种用户界面进行更新，则用户界面可能会更新所有列，即使只有部分列的值发生了更改。此外，您是否有充分的理由不使用视图按需从HR_EMPLOYMENT_数据中查找值，而不是使用触发器来尝试保持AD_集成的最新状态？使用触发器很难正确执行此操作。您是否在HR\U就业数据上有插入和删除触发器？关于AD_集成的更新和插入触发器呢？是的，有一些触发器是罪魁祸首，所以我想使用view是最好的选择。为什么我以前没想到这个？那么，为什么它会触发？这仍然没有答案，Brian猜测即使没有更改，用户界面也会对所有列进行更新，对吗？我看不出触发器有什么问题。除了非常聪明的评论，你可以使用一个视图，而不是保留冗余数据。