text: alter table sht.payout add column payout_id character varying;
  update sht.payout set payout_id = id::character varying;
  alter table sht.payout alter column payout_id set not null;
  
  alter table sht.payout alter column payout_id set not null;
  alter table sht.payout add constraint payout_ukey unique (payout_id);