QUERY PLAN
GroupAggregate (cost=60.86..60.88 rows=1 width=12)
Group Key: task_group_id
-> Sort (cost=60.86..60.87 rows=1 width=4)
Sort Key: task_group_id
-> Seq Scan on tbl_tasks (cost=0.00..60.85 rows=1 width=4)
Filter: ((parent_id IS NULL) AND (status = 0) AND (task_group_id = ANY ('{202,201,200,199,198,197,196,194,193,192}'::integer[])))