CREATE TABLE public.table1 (
  id SERIAL,
  CONSTRAINT table1_pkey PRIMARY KEY(id)
) 
WITH (oids = false);

CREATE TABLE public.table2 (
  id1 INTEGER NOT NULL,
  id2 INTEGER NOT NULL,
  CONSTRAINT table2_pkey PRIMARY KEY(id1, id2),
  CONSTRAINT table2_fk FOREIGN KEY (id1)
    REFERENCES public.table1(id)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION
    NOT DEFERRABLE,
  CONSTRAINT table2_fk1 FOREIGN KEY (id2)
    REFERENCES public.table1(id)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION
    NOT DEFERRABLE
) 
WITH (oids = false);

ALTER TABLE public.table2
  ALTER COLUMN id1 SET STATISTICS 0;

INSERT INTO table1 (id) VALUES (1);
INSERT INTO table1 (id) VALUES (2);

INSERT INTO table1 (id1,id2) VALUES (1,2);

INSERT INTO table1 (id1,id2) VALUES (2,1);