mysql - mysql触发器中的更新不起作用

Question

我正在创建一个触发器，以便在插入到我的 checkin 表中后执行，但我的更新语句不起作用

DELIMITER $$

DROP TRIGGER IF EXISTS checkins_AINS$$

CREATE TRIGGER `checkins_AINS` AFTER INSERT ON `checkins` FOR EACH ROW
BEGIN
    DECLARE client_id INT;
    DECLARE duplicate_record INTEGER DEFAULT 0;
    DECLARE bpoints INT;
    DECLARE business_id INT;
    DECLARE CONTINUE HANDLER FOR 1062 SET duplicate_record = 1;

    SELECT checkinPoints, id INTO bpoints, business_id FROM businesses WHERE id = new.venue_id;

    INSERT INTO clients_checkins_summary(client_id, venue_id, first_checkin, last_checkin,visits)
    VALUES(new.client_id, new.venue_id, new.createAt, new.createAt,1);

    INSERT INTO clients_points_summary(client_id, business_id,current_points)
    VALUES(new.client_id, business_id,bpoints);

    IF duplicate_record = 1
    THEN
        UPDATE clients_checkins_summary
                SET last_checkin = new.createAt,
                    visits = visits + 1
        WHERE client_id = new.client_id and venue_id = new.venue_id;

        UPDATE clients_points_summary
                SET current_points = current_points + bpoints
        WHERE client_id = new.client_id and business_id = business_id;
    END IF;

END$$
DELIMITER ;

插入:

insert into checkins(client_id,venue_id,points,createAt,updateAt)
values (52,19,1,now(),now());

第一次工作正常，但是当更新的情况触发时进入 if 但不更新值。

我将变量追踪到一个表中，所有值都是正确的，但更新没有更新任何内容。

我错过了什么？

Answer 1

am I missing something?

可能是这个

UPDATE clients_points_summary
            SET current_points = current_points + bpoints
    WHERE client_id = new.client_id and business_id = business_id;

这里的问题是您的局部变量 business_id 和列名 clients_points_summary.business_id 不明确。您可以按如下方式消除歧义:

UPDATE clients_points_summary cps
    SET cps.current_points = cps.current_points + bpoints
    WHERE cps.client_id = new.client_id and cps.business_id = business_id;