Question

I am grabbing the last rowid and i am doing this select @@IDENTITY

 pk = (long)cmd.ExecuteScalar();

I get an invalid typecast bc this is int instead of long. Why doesnt this return a long? can i make it return long?

Solution for now is to use

 pk = Convert.ToInt64(cmd.ExecuteScalar());

Answer 1

Use SCOPE_IDENTITY… which is correct and decimal(38,0) anyway…

SELECT CAST(SCOPE_IDENTITY() AS bigint)

However, you should note that @@IDENTITY is also decimal(38,0)

This is because it must encompass any datatype that can be autonumbered such as decimal and bigint

Edit:

Apparently it’s caused by unboxing. YMMV.