QUERY PLAN
GroupAggregate (cost=59.49..59.59 rows=5 width=12)
Group Key: parent_id
-> Sort (cost=59.49..59.51 rows=6 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..59.41 rows=6 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1753,1727,1724,1726,1725,1720,1719}'::integer[])))