QUERY PLAN
GroupAggregate (cost=57.06..57.15 rows=5 width=12)
Group Key: parent_id
-> Sort (cost=57.06..57.07 rows=6 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..56.98 rows=6 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1734,1735,1746,1751,1754,1772}'::integer[])))