将UDF与SQL查询一起使用时出现错误

Question

通过使用SQL项目模板将Visual Studio中的SQL项目模板用于Visual Studio，我已经做出了CLR：

  [Microsoft.SqlServer.Server.SqlFunction()]
    public static SqlDateTime ScalarUDF(SqlInt64 CompanyID)
    {
        SqlInt64 temp = CompanyID;
        string zoneId = "Singapore Standard Time";
        TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById(zoneId);
        DateTime result = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, tzi);

        return new SqlDateTime(result);
    }

并且还使用查询将UDF创建为SQL：

-- Install Assembly
CREATE ASSEMBLY UDF_Trial FROM 'C:\Users\Rahul\Documents\visual studio 2013\Projects\UDF_Trial\UDF_Trial\bin\Debug\UDF_Trial.dll'
GO
-- Create ScalarUDF
CREATE FUNCTION [dbo].[ScalarUDF](@CompanyID bigint)
RETURNS datetime
WITH EXECUTE AS CALLER
AS
EXTERNAL NAME UDF_Trial.UserDefinedFunctions.ScalarUDF;
GO

但是在执行UDF时，我会遇到一些错误：

我正在执行UDF，

select [dbo].[ScalarUDF](15)

但是获取异常为：

Msg 6522, Level 16, State 2, Line 2
A .NET Framework error occurred during execution of user-defined routine or aggregate "ScalarUDF": 
System.Security.HostProtectionException: Attempted to perform an operation that was forbidden by the CLR host.

The protected resources (only available with full trust) were: All
The demanded resources were: MayLeakOnAbort

System.Security.HostProtectionException: 
   at UserDefinedFunctions.ScalarUDF(SqlInt64 CompanyID)
.

创建大会时，我还向UNSAFE授予了以下权限：

使用PERMISSION_SET = UNSAFE从'C：\\ Users \\ Rahul \\ Desktop \\ pro_temp \\ UDF_Trial.dll'创建组装UDF_Trial; 走

但是在这种情况下，我得到的错误为：

CREATE ASSEMBLY for assembly 'UDF_Trial' failed because assembly 'UDF_Trial' is not authorized for PERMISSION_SET = UNSAFE.  The assembly is authorized when either of the following is true: the database owner (DBO) has UNSAFE ASSEMBLY permission and the database has the TRUSTWORTHY database property on; or the assembly is signed with a certificate or an asymmetric key that has a corresponding login with UNSAFE ASSEMBLY permission.

Answer 1

我将数据库的可信任度设置为：

ALTER DATABASE Learn SET TRUSTWORTHY ON

并将Assembly创建为::

CREATE ASSEMBLY UDF_Blog FROM 'C:\Users\Rahul\Documents\visual studio 2013\Projects\UDF_Trial\UDF_Trial\bin\Debug\UDF_Trial.dll'
WITH PERMISSION_SET = UNSAFE;
GO

问题就解决了。