QUERY PLAN
GroupAggregate (cost=53.04..53.14 rows=5 width=12)
Group Key: parent_id
-> Sort (cost=53.04..53.06 rows=6 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..52.96 rows=6 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1713,1731,1712}'::integer[])))