QUERY PLAN
GroupAggregate (cost=50.99..51.12 rows=7 width=12)
Group Key: parent_id
-> Sort (cost=50.99..51.01 rows=8 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..50.87 rows=8 width=4)
Filter: ((parent_id = ANY ('{1713,1810}'::integer[])) AND (status = 1))