QUERY PLAN
GroupAggregate (cost=63.72..63.94 rows=12 width=12)
Group Key: parent_id
-> Sort (cost=63.72..63.75 rows=14 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..63.45 rows=14 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1347,1348,1349,1356,1358,1596,1734,1823,1824,1830}'::integer[])))