gistfile1.txt

listenbrainz=#   INSERT INTO listen
listenbrainz-#        VALUES (1582632832, '7688DBA2-6033-47CD-8C6B-8C3617266C25', 'rob', '{}')
listenbrainz-#   ON CONFLICT (listened_at, recording_msid, user_name)
listenbrainz-#    DO NOTHING
listenbrainz-#     RETURNING listened_at, recording_msid, user_name;
 listened_at |            recording_msid            | user_name
-------------+--------------------------------------+-----------
  1582632832 | 7688dba2-6033-47cd-8c6b-8c3617266c25 | rob
(1 row)

INSERT 0 1
listenbrainz=#   INSERT INTO listen
       VALUES (1582632832, '7688DBA2-6033-47CD-8C6B-8C3617266C25', 'rob', '{}')
  ON CONFLICT (listened_at, recording_msid, user_name)
   DO NOTHING
    RETURNING listened_at, recording_msid, user_name;
 listened_at | recording_msid | user_name
-------------+----------------+-----------
(0 rows)

INSERT 0 0