Managed C++ User-defined Aggregate Function

Hi all,

I'm attempting to write an aggregate function in C++ to compare performance with the equivalent function in C#.

However, I'm having problems getting SQL Server to see the function in the assembly. It allows me to load the assembly into the database, but I can't see the type in it.

Here's my code:

// CPPTest.h

#pragma once

using namespace System;
using namespace Microsoft::SqlServer::Server;
using namespace System::Data::SqlTypes;
using namespace System::Data::SqlClient;

namespace CPPTest {

[Serializable]
[Microsoft::SqlServer::Server::SqlUserDefinedAggregate(
Format::Native,
Name="AGG_CPP_OR")]
public ref struct AGG_CPP_OR
{
public:
void Init();
void Accumulate(SqlInt32 Value);
void Merge(AGG_CPP_OR^ Group);
SqlInt32 Terminate();

private:
SqlInt32 m_accum;
};

}


// CPPTest.cpp

#include "stdafx.h"

#include "CPPTest.h"

void CPPTest::AGG_CPP_OR::Init()
{
m_accum = 0;
}

void CPPTest::AGG_CPP_OR::Accumulate(SqlInt32 Value)
{
m_accum = m_accum | Value;
}

void CPPTest::AGG_CPP_OR::Merge(CPPTest::AGG_CPP_OR^ Group)
{
m_accum = m_accum | Group->m_accum;
}

SqlInt32 CPPTest::AGG_CPP_OR::Terminate()
{
return m_accum;
}

Compile it with /clr:safe option and it can be loaded as an assembly into SQL Server 2005 (9.0.1399), but the AGG_CPP_OR type is not seen as an aggregate function. I've also tried implementing IBinarySerialize and setting Format to Format::UserDefined (and putting in MaxByteSize) but it makes no difference.

Does anyone know what I'm missing here?

Many thanks,