QUERY PLAN
HashAggregate (cost=60.23..60.40 rows=17 width=12)
Group Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..60.10 rows=25 width=4)
Filter: (parent_id = ANY ('{1596,1734,1686,1745,1641,1647,1735,1652,1697,1754}'::integer[]))