QUERY PLAN
GroupAggregate (cost=66.54..66.71 rows=9 width=12)
Group Key: parent_id
-> Sort (cost=66.54..66.57 rows=11 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..66.35 rows=11 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1714,1716,1717,1732,1800,1804,1805,1806,1807,1808,1809,1812}'::integer[])))