OK, but it can't prevent the external library from being changed
incompatibly or deleted, so any such guarantee is at best fleeting.

On the other hand, there is significant merit in being able to restore a
database with the required external libraries, which is logically the
same thing.

I agree that warning a user that a UDF can't be found at declaration
time time has merit. A warning, perhaps?

On 2/14/2014 4:49 AM, Dimitry Sibiryakov wrote:
> 14.02.2014 7:52, brucedickinson@... wrote:
>> Why it is a bug?
> Because it allows an invalid object to exist in database after commit. Such behavior is
> a bug, bringing database into not usable state.
>