关键字“TRIGGER”附近的 T-SQL 语法不正确

Posted 2023-05-08

【中文标题】关键字“TRIGGER”附近的 T-SQL 语法不正确

【英文标题】：T-SQL Incorrect syntax near the keyword 'TRIGGER'

【发布时间】：2017-10-27 06:38:22

【问题描述】：

我创建而不是这样的触发器：

CREATE TRIGGER ReadOnlyEvent ON 
TableName INSTEAD OF INSERT, UPDATE, DELETE AS BEGIN 
RAISERROR('Tables are read only.', 16, 1 ) ROLLBACK TRANSACTION END;

而且该代码运行良好。但是当我将它与 'IF' 结合起来时，我得到了一个错误：

 IF OBJECT_ID ('ReadOnlyEvent', 'TR') IS NULL 
    CREATE TRIGGER ReadOnlyEvent ON
 TableName INSTEAD OF INSERT, UPDATE, DELETE AS BEGIN 
 RAISERROR('Tables are read only.', 16, 1 ) ROLLBACK TRANSACTION END;

关键字“TRIGGER”附近的语法不正确。

我也尝试了 IF 与 BEGIN END:

IF OBJECT_ID ('ReadOnlyEvent', 'TR') IS NULL
BEGIN
    CREATE TRIGGER ReadOnlyEvent ON
    TableName INSTEAD OF INSERT, UPDATE, DELETE AS BEGIN 
    RAISERROR('Tables are read only.', 16, 1 ) ROLLBACK TRANSACTION END;
END;

为什么我得到这个错误？ :-)

【问题讨论】：

应该帮助你...***.com/questions/28225329/…

请特别注意，CREATE TRIGGER 必须是批处理中的第一个语句。

【参考方案1】：

标准结构

IF OBJECT_ID ('ReadOnlyEvent', 'TR') IS NOT NULL 
DROP TRIGGER dbo.ReadOnlyEvent
GO
CREATE TRIGGER dbo.ReadOnlyEvent ON
  TableName INSTEAD OF INSERT, UPDATE, DELETE AS BEGIN 
RAISERROR('Tables are read only.', 16, 1 ) ROLLBACK TRANSACTION END;
GO

【参考方案2】：

试试这个

IF NOT EXISTS ( SELECT  *  FROM    sys.objects WHERE   type = 'TR'
                    AND name = 'ReadOnlyEvent' ) 

BEGIN
    EXEC ('CREATE TRIGGER ReadOnlyEvent ON
    TableName INSTEAD OF INSERT, UPDATE, DELETE AS BEGIN 
    RAISERROR('Tables are read only.', 16, 1 ) ROLLBACK TRANSACTION END');
END;

【讨论】：

@Yogesh Sharma “表格”附近的语法不正确。却是那么接近解决。当我删除 RAISEERROR 语句时，它很好。转义（？）'字符的问题，在错误的字符上关闭 exec 命令。工作代码但没有 raiseerror code IF NOT EXISTS (SELECT * FROM sys.objects WHERE type = 'TR' AND name = 'CRMTelefonRekorduKampaniiReadOnlyEvent') BEGIN EXEC ('CREATE TRIGGER ReadOnlyEvent ON CRMTelefonRekorduKampanii INSTEAD OF INSERT, UPDATE, DELETE AS BEGIN ROLLBACK交易结束'); END;`代码'

【参考方案3】：

试试这个

BEGIN 
    IF OBJECT_ID ('ReadOnlyEvent', 'TR') IS NULL 
        BEGIN
            CREATE TRIGGER ReadOnlyEvent ON
            TableName INSTEAD OF INSERT, UPDATE, DELETE AS BEGIN 
            RAISERROR('Tables are read only.', 16, 1 ) ROLLBACK TRANSACTION END;
        END 
END