UPDATE virtual_field SET vfieldnum = nextval('public.virtual_field_vfieldnum_seq'::text) WHERE vfieldnum IS NULL;
ALTER TABLE virtual_field ALTER vfieldnum SET NOT NULL;
ALTER TABLE virtual_field ADD PRIMARY KEY (vfieldnum);
UPDATE virtual_field SET vfieldnum = nextval('public.virtual_field_vfieldnum_seq'::text) WHERE vfieldnum IS NULL;
ALTER TABLE virtual_field ALTER vfieldnum SET NOT NULL;
ALTER TABLE virtual_field ADD PRIMARY KEY (vfieldnum);