QUERY PLAN
GroupAggregate (cost=58.81..58.92 rows=6 width=12)
Group Key: parent_id
-> Sort (cost=58.81..58.83 rows=6 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..58.73 rows=6 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1746,1751,1754,1772,1823,1824,1830}'::integer[])))