text: --ALTER TABLE public.tbl_config_env ALTER column charset DROP NOT NULL;
  --ALTER TABLE public.tbl_config_env ALTER column host DROP NOT NULL;
  --ALTER TABLE public.tbl_config_env ALTER column name_db DROP NOT NULL;
  --ALTER TABLE public.tbl_config_env ALTER column port DROP NOT NULL;
  --ALTER TABLE public.tbl_config_env ADD COLUMN url_connection character varying(150);
  --ALTER TABLE public.tbl_config_env ADD COLUMN driver_connection character varying(120);*/