SQL Server 2008:在尝试通过连接访问数据库的CLR函数时出现异常

Question

我想在SQL Server 2008中使用CLR表值函数,它从内部访问数据库.我有一个许可例外.我试图以与创建它的用户相同的方式执行功能.所以问题的原因尚不清楚..

这是功能:

public partial class MyClass
    {    
        [SqlFunction(
            DataAccess = DataAccessKind.Read,
            FillRowMethodName = "Availability_FillRow",
            TableDefinition = "B0RID nchar(32)")]
        public static IEnumerable Fn_SEARCH_Availability(SqlDateTime checkin, SqlInt32 overnights)
        {
            if (checkin.IsNull || overnights.IsNull)
            {
                return null;
            }
            List<ResultRoom> roomsResultList = new List<ResultRoom>();


        using (SqlConnection conn = new SqlConnection("Data Source=MachineName;Initial Catalog=DBNANE;Integrated Security=True"))
        {
            conn.Open();
        }
        return roomsResultList;
    }
}

这是例外

A .NET Framework error occurred during execution of user-defined routine or aggregate "Fn_SEARCH_Availability": 
System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
System.Security.SecurityException: 
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.PermissionSet.Demand()
   at System.Data.Common.DbConnectionOptions.DemandPermission()
   at System.Data.SqlClient.SqlConnection.PermissionDemand()
   at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection)
   at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   at System.Data.SqlClient.SqlConnection.Open()
   at StoredProcedures.Fn_SEARCH_Availability(SqlDateTime checkin, SqlInt32 overnights)

Answer 1

也许尝试更改建立连接的using语句

using (SqlConnection conn = new SqlConnection("context connection=true;"))

这告诉CLR使用当前的SQL连接.

我猜你失败的原因是,通过指定集成安全性,它将使用SQL Server服务帐户的凭据.

在此更多信息点击这里