> Vlad,
>
> Why the new execute statement (in the separate branch) syntax has named
> parameters using colons instead of just question marks?
>
> AFAIR, syntax wasn't discussed here.

Because it is natural way for users of how to use parameters in client applications.
Firebird acts as client application in this case. Note, both colons and questions are
allowed to mark parameters. What problem do you see there ?

Regards,
Vlad