QUERY PLAN
GroupAggregate (cost=60.99..61.13 rows=7 width=12)
Group Key: parent_id
-> Sort (cost=60.99..61.02 rows=9 width=4)
Sort Key: parent_id
-> Seq Scan on tbl_tasks (cost=0.00..60.85 rows=9 width=4)
Filter: ((status = 1) AND (parent_id = ANY ('{1596,1641,1636,1637,1347,1358,1359,1349,1350,1357}'::integer[])))