我已经创建了这个触发器:
CREATE TRIGGER trig_update
AFTER INSERT
ON "delivery" FOR EACH ROW
EXECUTE PROCEDURE premium1();
有了这个功能:
CREATE OR REPLACE FUNCTION premium1()
RETURNS trigger AS $$
BEGIN
IF (TG_OP='INSERT') THEN
IF(select sum(amount) from delivery where cli_num=OLD.cli_num group by cli_num) > 500.00 THEN
UPDATE client SET Type ='Gold' WHERE cli_num=OLD.cli_num;
END IF;
END IF;
RETURN NULL;
END;
$$LANGUAGE plpgsql;
在表传递中插入新值时出现以下错误:
ERROR: record "old" is not assigned yet Stan SQL:55000
有什么帮助吗?
最佳答案
在 INSERT
触发器中 OLD
不可访问/可见,因为该记录还不在数据库中,因此没有什么可以与之比较。您必须将其更改为 NEW
。
For a row-level trigger, the input data also includes the NEW row for INSERT and UPDATE triggers, and/or the OLD row for UPDATE and DELETE triggers.
关于sql - 记录 "old"尚未分配,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40752230/