拜托，有人可以帮我在 mysql 中创建一个与下面的断言具有相同功能的触发器吗？

Question

所以基本上我想为 mysql 数据库创建一个触发器，该数据库具有 same/similar 函数和下面的断言代码（因为 mysql 不支持断言）

这是我想使用触发器复制的断言代码

CREATE ASSERTION assert
CHECK NOT EXISTS(SELECT * FROM paper P WHERE 3 <>(SELECT COUNT(*)
    FROM review R
    WHERE R.paperid = P.paperid)
);

CREATE ASSERTION atmostfivepapers
CHECK NOT EXISTS(SELECT * FROM pcmember P WHERE 5 <
    ( SELECT *
    FROM review R
    WHERE R.email = P.email
    )
);

这是我的 table

CREATE TABLE paper(
    paperid INT UNSIGNED NOT NULL AUTO_INCREMENT,
    title VARCHAR(50) NOT NULL,
    abstract VARCHAR(250),
    pdf VARCHAR(100),
    PRIMARY KEY(paperid)
);

CREATE TABLE author(
    email VARCHAR(100) NOT NULL,
    name VARCHAR(50),
    affiliation VARCHAR(100),
    PRIMARY KEY(email)
);

CREATE TABLE writePaper(
    paperid INT UNSIGNED NOT NULL AUTO_INCREMENT,
    email VARCHAR(100),
    paper_order INT,
    PRIMARY KEY(paperid, email),
    FOREIGN KEY(paperid) REFERENCES paper(paperid),
    FOREIGN KEY(email) REFERENCES author(email)
);

CREATE TABLE pcmember(
    email VARCHAR(100) NOT NULL,
    name VARCHAR(20),
    PRIMARY KEY(email)
);

CREATE TABLE review(
    reportid INT UNSIGNED,
    sdate DATE,
    comment VARCHAR(250),
    recommendation CHAR(1),
    paperid INT UNSIGNED,
    email VARCHAR(100),
    PRIMARY KEY(paperid, email),
    FOREIGN KEY(paperid) REFERENCES paper(paperid),
    FOREIGN KEY(email) REFERENCES pcmember(email)
);

提前致谢

Answer 1

首先创建另一个 table 来复制列及其特征。然后创建触发器。

  CREATE TRIGGER afterInsert_trigger on yourMainTableName
  FOR INSERT
  AS
  INSERT INTO yourTableCopy(column1ofYourReplicateTable, column2OFyourReplicateTable, ... etc)
  SELECT column1ofYourMainTable, column2ofYourMainTable, ..., etc
  
  FROM INSERTED

这就是我在 Microsoft SQL 服务器中使用的

拜托，有人可以帮我在 mysql 中创建一个与下面的断言具有相同功能的触发器吗？

Please, can someone help me to create a trigger in mysql that has a same function with the assertion below?

mysql

database

triggers

assertion