QUERY PLAN
GroupAggregate (cost=50.74..50.78 rows=2 width=12)
Group Key: parent_id
-> Sort (cost=50.74..50.75 rows=2 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..50.73 rows=2 width=4)
Filter: ((parent_id = ANY ('{1653,1654}'::integer[])) AND (status = 1))