> ALTER TABLE <table name> ALTER CONSTRAINT <foreign key name> INAVTIVE
> Dynamic SQL Error SQL error code = -104 Token unknown - line 1, char 37
> CONSTRAINT

Sure, this construct does not exist yet, but maybe Jim adds it in Vulcan :)

> Although it might be implemented by turning off the trigger that
> enforces it.

There are no trigger, it is checked by the corresponding index... which
cannot be deactivated. So for now you can only drop constraint.