CREATE OR REPLACE FUNCTION update_category() RETURNS trigger AS $newProduct$
BEGIN
    UPDATE category SET product_count = product_count + 1 WHERE cat_id = NEW.cat_id;
    INSERT INTO notification (content,type,p_id) VALUES('new product',1,NEW.p_id);
    RETURN NEW;
END;
$newProduct$LANGUAGE plpgsql;

CREATE TRIGGER update_cat AFTER INSERT ON product
    EXECUTE PROCEDURE update_category();

将记录插入产品后,我收到错误：

[2017-03-20 16:05:05] [55000] ERROR: record "new" is not assigned yet
[2017-03-20 16:05:05] Detail: The tuple structure of a not-yet-assigned record is indeterminate.
[2017-03-20 16:05:05] Where: sql statement "UPDATE category SET product_count = product_count + 1 WHERE cat_id = NEW.cat_id"
[2017-03-20 16:05:05] PL/pgsql function update_category() line 3 at sql statement

我四处寻找解决方案,但我只找到错误的原因

FOR EACH STATEMENT

正在被用来代替

FOR EACH ROW

看到我只是执行一次程序,解决方案不适用于我的情况.

谢谢你的帮助！