QUERY PLAN
GroupAggregate (cost=54.18..54.35 rows=9 width=12)
Group Key: parent_id
-> Sort (cost=54.18..54.21 rows=10 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..54.02 rows=10 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1713,1777,1810,1811}'::integer[])))