QUERY PLAN
GroupAggregate (cost=49.37..49.41 rows=2 width=12)
Group Key: parent_id
-> Sort (cost=49.37..49.38 rows=2 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..49.36 rows=2 width=4)
Filter: ((parent_id = ANY ('{1654,1653}'::integer[])) AND (status = 1))