On 12 Sep 2002 at 7:57, Alexander V.Nevsky wrote:

>don't know about it. Simply example - null in _not null_ column, we
>can make this mistake ourselves changing metadata, sometimes such a
>records appears when server crashed with unfinished garbage collection
>process.

A real story: Once upon the time when FB was beta 2, I had backed
my DB up, tried to restore on an other computer - fail. "Null in not
null column". Oh, my! After a minute of panic I repeated the
backup/restore - everything ok.

SY, Dimitry Sibiryakov.