QUERY PLAN
GroupAggregate (cost=63.44..63.63 rows=10 width=12)
Group Key: parent_id
-> Sort (cost=63.44..63.47 rows=12 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..63.23 rows=12 width=4)
Filter: (parent_id = ANY ('{1714,1716,1717,1732,1800,1804,1805,1806,1807,1808,1809,1812}'::integer[]))