QUERY PLAN
GroupAggregate (cost=64.95..65.12 rows=9 width=12)
Group Key: parent_id
-> Sort (cost=64.95..64.98 rows=10 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..64.79 rows=10 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1714,1716,1717,1732,1800,1804,1805,1806,1807,1808,1809}'::integer[])))