Backlog Courrier

En tant qu'administrateur technique, lorsque je fais une mise à jour, il y a la requête ci-dessous qui est extrêmement longue car j'ai énormément de courrier en base.

DO $$ BEGIN
  IF (SELECT count(attname) FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'mlb_coll_ext') AND attname = 'recommendation_limit_date') = 1 THEN
    ALTER TABLE res_letterbox ADD COLUMN opinion_limit_date TIMESTAMP without TIME ZONE DEFAULT NULL;
    UPDATE res_letterbox SET opinion_limit_date =
    (
      SELECT recommendation_limit_date FROM mlb_coll_ext
      WHERE res_letterbox.res_id = mlb_coll_ext.res_id
    );
    ALTER TABLE mlb_coll_ext DROP COLUMN IF EXISTS recommendation_limit_date;
  END IF;
END$$;

Il faut ajouter une condition pour que ça marche mieux

DO $$ BEGIN
  IF (SELECT count(attname) FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'mlb_coll_ext') AND attname = 'recommendation_limit_date') = 1 THEN
    ALTER TABLE res_letterbox ADD COLUMN opinion_limit_date TIMESTAMP without TIME ZONE DEFAULT NULL;

UPDATE res_letterbox SET opinion_limit_date = mlb_coll_ext.recommendation_limit_date 
FROM mlb_coll_ext
WHERE res_letterbox.res_id = mlb_coll_ext.res_id
AND recommendation_limit_date IS NOT NULL;

    ALTER TABLE mlb_coll_ext DROP COLUMN IF EXISTS recommendation_limit_date;
  END IF;
END$$;