QUERY PLAN
GroupAggregate (cost=61.85..62.03 rows=9 width=12)
Group Key: parent_id
-> Sort (cost=61.85..61.88 rows=11 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..61.66 rows=11 width=4)
Filter: (parent_id = ANY ('{1732,1809,1808,1807,1806,1805,1804,1800,1714,1717,1716}'::integer[]))