QUERY PLAN
GroupAggregate (cost=60.89..61.04 rows=7 width=12)
Group Key: parent_id
-> Sort (cost=60.89..60.92 rows=10 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..60.73 rows=10 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1596,1641,1636,1637,1591,1639,1585,1347,1358,1359}'::integer[])))