What does the "Update" button do for complex types in EF when using function import

In EF, when you add a function import, you are asked to specify the name and the SProc. Then you can decide the return (it can be No开发者_StackOverflow中文版ne, Scalers, Complex, and Entities).

What happens when you choose Complex and then press the update button? I think I screwed up my db when I pressed the Update button. I reverted and then didn't press it and it works well.

So, what does Update do?

Update button doesn't affect DB. It is used if you modify your stored procedure and import it again and you want to update existing complex type instead of deleting it and creating a new one.