QUERY PLAN
GroupAggregate (cost=57.04..57.13 rows=5 width=12)
Group Key: parent_id
-> Sort (cost=57.04..57.05 rows=5 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..56.98 rows=5 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1732,1790,1789,1788,1787,1786}'::integer[])))