QUERY PLAN
GroupAggregate (cost=60.20..60.31 rows=6 width=12)
Group Key: parent_id
-> Sort (cost=60.20..60.22 rows=7 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..60.10 rows=7 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1732,1789,1788,1787,1786,1714,1717,1716}'::integer[])))