QUERY PLAN
GroupAggregate (cost=60.22..60.35 rows=7 width=12)
Group Key: parent_id
-> Sort (cost=60.22..60.24 rows=8 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..60.10 rows=8 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1697,1723,1734,1735,1745,1746,1751,1754}'::integer[])))