对象名称中不允许使用 SqlCmd 变量引用

Question

我正在创建一个 Visual Studio 数据库项目。

在其中一个脚本中，我想实现类似的目标

CREATE USER [$(DatabaseName)\UserX]
    WITHOUT LOGIN
    WITH DEFAULT_SCHEMA = dbo

哪个弹窗错误

SQL70604：对象名称中不允许使用 SqlCmd 变量引用 ($(数据库名称)\UserX).

经过一番研究，我发现最接近的解决方案是通过

sp_executesql

创建用户，但这会导致模式比较功能无效，对吗？

我对数据库项目不太熟悉，但我想应该有一些更好的方法来实现这一点，我只需要一些指导。

Answer 1

The error message: `"SQL70604: SqlCmd variable reference is not allowed in object names ($(DatabaseName)\UserX)"` indicates that you cannot use SqlCmd variables to dynamically construct object names (including usernames) within SQL statements.

You can use somthing like this : 

>     use databaseName
>     CREATE USER [UserX]
>         WITHOUT LOGIN
>         WITH DEFAULT_SCHEMA = dbo

[db name][1]
[db query][2]
[user created][3]

But let's say, you want to dynamically construct object names (including usernames) within SQL statements.

For that you can create a SQL statement and use `sp_executesql` command:

    DECLARE @sql NVARCHAR(MAX) = N'CREATE USER [YourUserName] WITHOUT LOGIN WITH DEFAULT_SCHEMA = dbo'; 
    
    EXEC sp_executesql @sql, N'@DatabaseName sysname', @DatabaseName = N'yourdatabase';

[Dynamic Query Execution][4]


  [1]: https://i.stack.imgur.com/qtJNZ.png
  [2]: https://i.stack.imgur.com/6t4iR.png
  [3]: https://i.stack.imgur.com/eXm3O.png
  [4]: https://i.stack.imgur.com/ZYHiF.png