SELECT
    relname,
    seq_scan - idx_scan AS too_much_seq,
    CASE
      WHEN
        seq_scan - coalesce(idx_scan, 0) > 0
      THEN
        'Missing Index?'
      ELSE
        'OK'
    END,
    pg_relation_size(relname::regclass) AS rel_size, seq_scan, idx_scan
  FROM
    pg_stat_all_tables
  WHERE
    schemaname = 'public'
    AND pg_relation_size(relname::regclass) > 80000
  ORDER BY
    too_much_seq DESC;