QUERY PLAN
GroupAggregate (cost=53.43..53.50 rows=4 width=12)
Group Key: parent_id
-> Sort (cost=53.43..53.44 rows=4 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..53.39 rows=4 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1596,1641,1631,1630,1629}'::integer[])))