QUERY PLAN
GroupAggregate (cost=55.27..55.34 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=55.27..55.28 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..55.23 rows=4 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1732,1717,1716,1715,1714}'::integer[])))