QUERY PLAN
GroupAggregate (cost=60.40..60.52 rows=6 width=12)
Group Key: parent_id
-> Sort (cost=60.40..60.42 rows=7 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..60.30 rows=7 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1732,1800,1804,1805,1807,1808,1809,1812}'::integer[])))