Question

我试图触发一个触发器，如果owner_id为null，则在更新或插入owner_notif_sta后将owner_notif_sta设置为null。 owner_id和owner_notif_sta都来自同一个表。

触发器：

CREATE TRIGGER check_owner
AFTER UPDATE OF owner_notif_sta ON risk
REFERENCING OLD AS EXISTING
FOR EACH ROW MODE DB2SQL
    UPDATE risk SET owner_notif_sta = NULL
    WHERE owner_id IS NULL;

我试图解决的更新：

UPDATE RISK SET owner_notif_sta = 'helloo' WHERE risk_id = 'ICT123';

并且owner_id为null（当我解除更新时未填充）

我收到以下错误：错误54038：超出了嵌套触发器的最大深度。

提前致谢

Answer 1

如何稍微更改UPDATE语句以将已owner_notif_sta的行排除为null：

CREATE TRIGGER check_owner
AFTER UPDATE OF owner_notif_sta ON risk
REFERENCING OLD AS EXISTING
FOR EACH ROW MODE DB2SQL
    UPDATE risk 
       SET owner_notif_sta = NULL
     WHERE owner_id IS NULL
       AND owner_notif_sta IS NOT NULL;

Derby ERROR 54038：超出了嵌套触发器的最大深度

1 个答案: