QUERY PLAN
GroupAggregate (cost=50.62..50.69 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=50.62..50.63 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..50.59 rows=4 width=4)
Filter: ((parent_id = ANY ('{1767,1713}'::integer[])) AND (status = 1))