Question

我正在尝试使用用于nodejs的mysql包为数据库创建触发器。但我说

时出错

您的SQL语法有错误；检查与您的MySQL服务器版本相对应的手册以获取正确的语法，以在\'DELIMITER $$ CREATE TRIGGER'NotificationTrigger'附近第1行'INSERT ON'Leave \'之后使用。

var createNotificationTrigger = {
  query:

    'DELIMITER $$\
    CREATE TRIGGER `NotificationTrigger` \
    After INSERT  ON `Leave` \
    FOR EACH ROW \
    BEGIN \
    Declare fullname  varchar(255); \
    Declare lastname  varchar(255); \
    Declare requestedbyid  int; \
    Declare insertstring varchar(255); \
    Set fullname = ( select Employee.FirstName from Employee where Employee.ID = NEW.RequestedByID); \
    Set lastname =    ( select Employee.LastName from Employee where Employee.ID = NEW.RequestedByID); \
    set fullname = (select  Concat(fullname," ",lastname)); \
    set requestedbyid= (select  New.RequestedByID); \
    set  insertstring = (select Concat("New Leave request from ",fullname , " employee id : ",requestedbyid)); \
    INSERT INTO `Notification` \
    (`Title`,`SeenBy`,`SentByID`,`NotificationTypeID`) \
    VALUES(insertstring, requestedbyid, requestedbyid,2) ; \
    END$$ \
    DELIMITER ;'

};

这是我的触发器查询的样子。我正在使用：

connection.query(createNotificationTrigger.query,[],(err)=>{//something here});

这应该在我的数据库中创建一个触发器，但是引发了上述错误。该查询在mysql工作台中正常工作。

Answer 1

根据this answer，通过删除DELIMITER语句，您应该能够创建触发器而不会出错。我已经使用自己的模式和自己的触发器进行了测试，并且可以正常工作。

因此，您的代码应修改为以下内容以使其起作用：

var createNotificationTrigger = {
  query:
    'CREATE TRIGGER `NotificationTrigger` \
    After INSERT  ON `Leave` \
    FOR EACH ROW \
    BEGIN \
    Declare fullname  varchar(255); \
    Declare lastname  varchar(255); \
    Declare requestedbyid  int; \
    Declare insertstring varchar(255); \
    Set fullname = ( select Employee.FirstName from Employee where Employee.ID = NEW.RequestedByID); \
    Set lastname =    ( select Employee.LastName from Employee where Employee.ID = NEW.RequestedByID); \
    set fullname = (select  Concat(fullname," ",lastname)); \
    set requestedbyid= (select  New.RequestedByID); \
    set  insertstring = (select Concat("New Leave request from ",fullname , " employee id : ",requestedbyid)); \
    INSERT INTO `Notification` \
    (`Title`,`SeenBy`,`SentByID`,`NotificationTypeID`) \
    VALUES(insertstring, requestedbyid, requestedbyid,2) ; \
    END'
};

如何使用用于nodejs的mysqljs包创建触发器？

1 个答案: