QUERY PLAN
GroupAggregate (cost=55.66..55.73 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=55.66..55.67 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..55.62 rows=4 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1732,1717,1716,1715,1714}'::integer[])))