QUERY PLAN
GroupAggregate (cost=57.26..57.35 rows=5 width=12)
Group Key: parent_id
-> Sort (cost=57.26..57.27 rows=5 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..57.20 rows=5 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1700,1710,1709,1708,1703,1698}'::integer[])))