QUERY PLAN
GroupAggregate (cost=54.62..54.68 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=54.62..54.62 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..54.58 rows=4 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1714,1716,1717,1732}'::integer[])))