in earlier versions of Firebird - when i try to change column nullable to not null

this go very very fast but without check of all records contain value in such field.

I see that in FB3 this was changed and before apply not null to column - all existed data are validated.

 

Is three some possibility to disable this behavior?

On my big table with 910 468 710 records this operation take 72 minutes.

I am sure that all records contain value in this field and this check is then "useless".