QUERY PLAN
GroupAggregate (cost=62.02..62.17 rows=8 width=12)
Group Key: parent_id
-> Sort (cost=62.02..62.04 rows=9 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..61.88 rows=9 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1697,1734,1735,1746,1751,1754,1768,1769,1772}'::integer[])))