explain select id from asset.copy;
                              QUERY PLAN
----------------------------------------------------------------------
 Append  (cost=0.00..557612.09 rows=16244009 width=8)
   ->  Seq Scan on copy  (cost=0.00..557600.49 rows=16243849 width=8)
   ->  Seq Scan on unit  (cost=0.00..11.60 rows=160 width=8)
(3 rows)