QUERY PLAN
GroupAggregate (cost=47.82..47.94 rows=6 width=12)
Group Key: parent_id
-> Sort (cost=47.82..47.84 rows=7 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..47.73 rows=7 width=4)
Filter: (parent_id = ANY ('{1713,1777}'::integer[]))