Question

Suposse I have an UDF in SQL Server 2008:

Create function dbo.ReadXml (@xmlMatrix xml) returns table
as
return
( select
   --SOME C++ CODE
)
go

• Is it possible to add a c++ code or call a c++ function inside the UDF?

Answer 1

Onyl if this C++ function was compiled and installed as an extended stored procedure.
But extended stored procedures are deprecated and will be removed soon.

So your only reliable option is to write a CLR function. It can be a C# CLR function that calls an external C++ dll, or it might be a managed C++ CLR function that would contain your code directly.