QUERY PLAN
GroupAggregate (cost=52.46..52.53 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=52.46..52.47 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..52.42 rows=4 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1679,1678,1677,1676}'::integer[])))