QUERY PLAN
GroupAggregate (cost=65.19..65.35 rows=9 width=12)
Group Key: parent_id
-> Sort (cost=65.19..65.21 rows=10 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..65.02 rows=10 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1702,1701,1694,1693,1691,1692,1690,1648,1689,1651,1650}'::integer[])))