我需要在我的數據庫中創建一個觸發器。 觸發器必須能夠在插入前分析事件。如果數據庫中已存在的最後一個事件具有相同的狀態,則觸發器必須取消插入並更新最後一個事件。插入之前的MySQL和觸發器
我試圖創建一個,但我不能在我的數據庫添加它因爲MySQL的錯誤:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 5
這裏觸發:
CREATE TRIGGER events_before_insert
BEFORE INSERT ON monitoringV2.events
FOR EACH ROW
BEGIN
DECLARE id_last_event;
DECLARE status_last_event;
SELECT id INTO id_last_event, status INTO status_last_event FROM events WHERE module_id=NEW.module_id ORDER BY serverDate DESC LIMIT 1;
IF NEW.status = status_last_event THEN
UPDATE events SET serverDate=NOW() WHERE id=id_last_event;
signal sqlstate '00000' set message_text = "Update instead of insert";
END IF;
END;
這裏是信息服務器:
PHP 5.4.6 VC9
Apache 2.4.2 VC9
MySQL 5.5.27
PhpMyAdmin 3.5.2.2
感謝您的幫助
問候,
Dorine M.