QUERY PLAN
GroupAggregate (cost=49.79..49.86 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=49.79..49.80 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..49.75 rows=4 width=4)
Filter: (parent_id = ANY ('{1714,1716,1717,1732}'::integer[]))