我有一个简单的问题.我有一个触发器可以将值插入另一个数据库
I have a simple question. Ive got a trigger to insert the values into another Database
例如,如果有两个值,并且触发器正在检查Table A中的值并将其插入Table B
So for example if there are two values and the trigger is checking the value in Table A and inserting into Table B
这是代码
-- Trigger DDL Statements USE `db`; DELIMITER // CREATE DEFINER=CURRENT_USER() TRIGGER `db`.`AFTER_INSERT_A` AFTER INSERT ON `db`.`a` FOR EACH ROW BEGIN IF NEW.val!= NULL THEN UPDATE b SET dateRemove=CURRENT_TIMESTAMP WHERE val=NEW.val; INSERT INTO b (val) VALUES(NEW.val) ON DUPLICATE KEY UPDATE dateRemove=NULL, dateUpdate=CURRENT_TIMESTAMP; END IF; END//触发点甚至会引发任何错误.而且我在B中没有值
The trigger dosent even throw any errors. And i have no values in B
我的插入内容是
INSERT INTO a (val) VALUES(`test`) ON DUPLICATE KEY UPDATE dateUpdate=CURRENT_TIMESTAMP任何人都有任何想法.我尝试创建两个触发器,一个为INSERT,另一个为UPDATE,我将AFTER更改为BEFORE,而我的表b仍然没有任何响应.任何想法在此先感谢
Has any one got any ideas. Ive tried creating two triggers one INSERTand the other UPDATE, Ive changed the AFTER to BEFORE and my table b still got nothing. Any ideas thanks in advance
推荐答案要在诸如
INSERT INTO table (x, y, z) VALUES('x', 'y', 'z') ON DUPLICATE KEY UPDATE x=VALUES(x);必须始终在BEFORE INSERT触发器上运行.
must always be run on a BEFORE INSERT Trigger.
更多推荐
在INSERT ON DUPLICATE KEY上触发
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