我怎样才能让我的 sql 触发关于不恰当的词的工作

Question

我有一个包含不同 table 的数据库，用于存储照片、用户、评论、评分...我想验证没有人在他们的照片标题中使用“脏话”（侮辱）或说明。所以我决定创建一个名为 'inappropiatewords' 的 table 来存储所有这些坏词，然后我创建了以下触发器：

DELIMITER //
CREATE OR REPLACE TRIGGER tBadWords_RNC02
    BEFORE INSERT ON Photos
    FOR EACH ROW
    BEGIN
        DECLARE numwords INT;
        SET numwords = (SELECT COUNT(*) FROM inappropiatewords);
        DECLARE title VARCHAR(128);
        DECLARE description VARCHAR(512);
        SET title = (SELECT title FROM Photos WHERE photoId = new.photoId);
        SET description = (SELECT description FROM Photos WHERE photoId = new.photoId);
        DECLARE x INT;
        SET x = 1;
        WHILE x <= numwords DO
            DECLARE word VARCHAR(200);
            SET word = (SELECT word FROM inappropiatewords WHERE inappropiateWordId = x);
            IF(INSTR(title,word) > 0 OR INSTR(description,word) > 0) THEN
                SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'You cannot use inappropiate words in title or description';
            END IF;
    END //
DELIMITER ;

但是当我尝试运行时，出现以下错误： [错误图片][1]

我不知道自己做错了什么，所以如果有人能帮助我，我将不胜感激。我正在使用 HeidiSQL 和 MariaDB。 [1]: https://i.stack.imgur.com/FFc6a.jpg

更新我做了以下更改：

DELIMITER //
CREATE OR REPLACE TRIGGER tBadWords_RNC02
    BEFORE INSERT ON Photos
    FOR EACH ROW
    BEGIN
        DECLARE numwords INT;
        SET numwords = (SELECT COUNT(*) FROM inappropiatewords);
        FOR x IN 1..numwords DO
            DECLARE word VARCHAR(200);
            SET word = (SELECT word FROM inappropiatewords WHERE inappropiateWordId = x);
            IF(INSTR(NEW.title,word) > 0 OR INSTR(NEW.description,word) > 0) THEN
                SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'You cannot use inappropiate words in title or description';
            END IF;
    END //
DELIMITER ;

但我仍然遇到错误:(

Answer 1

可以简单一点

DELIMITER //
CREATE OR REPLACE TRIGGER tBadWords_RNC02
    BEFORE INSERT ON Photos
    FOR EACH ROW
    BEGIN
       IF (EXISTS (
            SELECT 1 
            FROM inappropiatewords bw
            WHERE INSTR(NEW.title, bw.word) > 0 OR INSTR(NEW.description,  bw.word) > 0
          ))
       THEN
         SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'You cannot use inappropiate words in title or description';
       END IF;
END //
DELIMITER ;

db<>fiddle

我怎样才能让我的 sql 触发关于不恰当的词的工作

How can I make my sql trigger about inappropiate words work

mysql

sql

database

triggers

mariadb