MYSQL 触发器有关问题

MYSQL 触发器问题

SQL code

  create trigger amountlog_update_recalculated before update on dm_amountlog for each row
BEGIN
    SET @cur=curdate();
    set NEW.actualyear=year(@cur);
    set NEW.actualmonth=month(@cur);
    set NEW.actualday=day(@cur);
    SET @suma=dm_amount.paid+NEW.actualpayment;
    update dm_amount set dm_amount.paid=@suma where dm_amount.docid=NEW.docid;
END;

这个触发器更新的时候为什么提示找不到表“dm_amount”，但这张表确实是存在的，而且也没有错误

还有下面一个触发器，为什么总提示出错，上面的触发器是是因为下面这个触发器问题解决不了所以拆出来的

SQL code

  create trigger amountlog_update_recalculated before update on dm_amountlog for each row
BEGIN
    SET @cur=curdate();
    set NEW.actualyear=year(@cur);
    set NEW.actualmonth=month(@cur);
    set NEW.actualday=day(@cur);
    SET @suma=select sum(dm_amountlog.actualpayment) from dm_amountlog where dm_amountlog.docid=NEW.docid;
    update dm_amount set dm_amount.paid=@suma where dm_amount.docid=NEW.docid;
    IF dm_amount.paid=dm_amount.payment where dm_amount.docid=NEW.docid THEN
        update dm_amount SET dm_amount.isdone=1 where dm_amount.docid=NEW.docid;
    END IF;
END;
$$

望大侠指教

引用还有下面一个触发器，为什么总提示出错，上面的触发器是是因为下面这个触发器问题解决不了所以拆出来的




DELIMITER $$

CREATE TRIGGER amountlog_update_recalculated BEFORE UPDATE ON dm_amountlog 

FOR EACH ROW

BEGIN

SET @cur=CURDATE();

SET NEW.actualyear=YEAR(@cur);

SET NEW.actualmonth=MONTH(@cur);

SET NEW.actualday=DAY(@cur);

SET @suma=(SELECT SUM(dm_amountlog.actualpayment) FROM dm_amountlog WHERE dm_amountlog.docid=NEW.docid);

UPDATE dm_amount SET dm_amount.paid=@suma WHERE dm_amount.docid=NEW.docid;

IF dm_amount.paid=dm_amount.payment AND dm_amount.docid=NEW.docid THEN

UPDATE dm_amount SET dm_amount.isdone=1 WHERE dm_amount.docid=NEW.docid;

END IF;

END;$$

DELIMITER ;