Hi is it expected in this moment?
Table "public.foo" Column │ Type │ Modifiers ════════╪═════════╪═══════════ a │ integer │ postgres=# \d foo2 Table "public.foo2" Column │ Type │ Modifiers ════════╪═════════╪═══════════ a │ numeric │ postgres=# explain select sum(a) from foo; QUERY PLAN ════════════════════════════════════════════════════════════════════════════════════════ Finalize Aggregate (cost=76498.35..76498.36 rows=1 width=8) -> Gather (cost=76497.93..76498.34 rows=4 width=8) Number of Workers: 4 -> Partial Aggregate (cost=75497.93..75497.94 rows=1 width=8) -> Parallel Seq Scan on foo (cost=0.00..69247.94 rows=2499994 width=4) (5 rows) postgres=# explain select sum(a) from foo2; QUERY PLAN ══════════════════════════════════════════════════════════════════════ Aggregate (cost=179053.25..179053.26 rows=1 width=32) -> Seq Scan on foo2 (cost=0.00..154053.60 rows=9999860 width=12) (2 rows) Regards Pavel p.s. It great step forward - it looks pretty well