QUERY PLAN
GroupAggregate (cost=62.07..62.24 rows=9 width=12)
Group Key: parent_id
-> Sort (cost=62.07..62.10 rows=11 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..61.88 rows=11 width=4)
Filter: (parent_id = ANY ('{1714,1716,1717,1732,1800,1804,1805,1807,1808,1809,1812}'::integer[]))