QUERY PLAN
GroupAggregate (cost=58.62..58.71 rows=5 width=12)
Group Key: parent_id
-> Sort (cost=58.62..58.63 rows=6 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..58.54 rows=6 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1732,1800,1804,1805,1807,1808,1809}'::integer[])))