text: alter table "public"."eval_evaluation"
    add constraint "eval_evaluation_eval_period_id_fkey"
    foreign key (eval_period_id)
    references "public"."eval_period"
    (id) on update cascade on delete cascade;
  alter table "public"."eval_evaluation" alter column "eval_period_id" drop not null;
  alter table "public"."eval_evaluation" add column "eval_period_id" int4;
  