Derby 错误 54038：超出嵌套触发器的最大深度

Question

如果 owner_id 为 null，我试图在更新或插入 owner_notif_sta 后触发将 owner_notif_sta 设置为 null 的触发器。 owner_id 和 owner_notif_sta 都来自同一个 table.

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;

我尝试触发的更新：

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

和 owner_id 为空（我启动更新时未填充）

我收到以下错误：错误 54038：超出嵌套触发器的最大深度。

提前致谢

Answer 1

如何稍微更改 UPDATE 语句以排除已经将 owner_notif_sta 设为空的行：

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 错误 54038：超出嵌套触发器的最大深度

Derby ERROR 54038: Maximum depth of nested triggers was exceeded

sql

database

derby