QUERY PLAN
GroupAggregate (cost=62.00..62.13 rows=7 width=12)
Group Key: parent_id
-> Sort (cost=62.00..62.02 rows=8 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..61.88 rows=8 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1732,1800,1804,1805,1806,1807,1808,1809,1812}'::integer[])))