ALTER TABLE content_executive_document ALTER COLUMN id_content TYPE serial USING id_content::serial;
ALTER TABLE content_executive_document ALTER COLUMN id_content SET DEFAULT nextval('content_executive_document_id_content_seq');
ALTER SEQUENCE content_executive_document_id_content_seq OWNED BY content_executive_document.id_content;

CREATE TABLE public.content_executive_document
(
  id_content integer NOT NULL DEFAULT nextval('content_executive_document_id_content_seq'::regclass), -- Уникальный номер записи (primary key)
  content_name character varying(255) NOT NULL,
  CONSTRAINT pk_content_executive_document PRIMARY KEY (id_content)
)