QUERY PLAN
GroupAggregate (cost=54.28..54.35 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=54.28..54.29 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..54.24 rows=4 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1700,1710,1703,1698}'::integer[])))