问题
Assume the assembly dll:
using Microsoft.SqlServer.Server;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System;
using System.Text;
namespace CLRFunctions
{
public class T
{
[SqlFunction(DataAccess = DataAccessKind.Read)]
public static String NormalizeString(String s, String normalizationForm)
{
NormalizationForm form = NormalizationForm.FormC;
if (String.Equals(f, "FormD", StringComparison.OrdinalIgnoreCase))
form = NormalizationForm.FormD;
return = s.Normalize(form);
}
}
}
Note: Target the assembly to .NET 3.5 as SQL Server doesn't support .NET 4.0
Copy the assembly to a location, and "creating" the assembly works fine:
CREATE ASSEMBLY CLRFunctions FROM 'c:\Program Files\My App\CLRFunctions.dll';
Note: And then enable CLR functions, otherwise they are broken by default:
sp_configure 'show advanced options', 1;
GO
RECONFIGURE;
GO
sp_configure 'clr enabled', 1;
GO
RECONFIGURE;
GO
Created the user-defined function fails:
CREATE FUNCTION NormalizeString(@s nvarchar(max), @normalizationForm varchar(50))
RETURNS nvarchar(max)
AS EXTERNAL NAME CLRFunctions.T.NormalizeString
fails with error:
Msg 6505, Level 16, State 2, Procedure NormalizeString, Line 1
Could not find Type 'T' in assembly 'CLRFunctions'.
Why can SQL Server not find type T
in assembly CLRFunctions
?
Note: Why T
? Cause Microsoft did.
回答1:
Try
CREATE FUNCTION NormalizeString(@s nvarchar(max),
@normalizationForm nvarchar(50))
RETURNS nvarchar(max)
AS EXTERNAL NAME CLRFunctions.[CLRFunctions.T].NormalizeString
回答2:
I just busted my skull on this in Visual Studio 2017, building a CLR in VB. What I found out, when creating the procedure in SQL, THE EXTERNAL NAME is set as follows:
AssemblyName
.[Assemblyname.ClassNameInVBProgram]
.SubroutineNameInVBProgram
And it is Case Sensitive.
Use Create Assembly
in SQL to create the Sql Assembly
Use Create Procedure
in SQL to create the CLR SP.
来源:https://stackoverflow.com/questions/7823488/sql-server-could-not-find-type-in-the-assembly