QUERY PLAN
HashAggregate (cost=79.41..79.60 rows=19 width=12)
Group Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..79.25 rows=32 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1535,1547,1546,1543,1548,1544,1549,1565,1596,1686,1647,1672,1669,1668,1667,1662,1661,1580,1578,1577}'::integer[])))