QUERY PLAN
HashAggregate (cost=60.22..60.39 rows=17 width=12)
Group Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..60.10 rows=24 width=4)
Filter: (parent_id = ANY ('{1586,1596,1641,1647,1683,1684,1686,1687,1696,1697}'::integer[]))