> The problem with an info item is that you need to know before you
> prepare the statement what kind of statement you have to prepare.

You're right.

> Throwing an error if it's the wrong kind of procedure would be cheaper
> and easier to implement, but it does suffer from gag factor.

People have suggested that this might break existing applications. As
I wrote before, a flag and/or new CALL statement sound the most
correct solutions to the issue.