QUERY PLAN
GroupAggregate (cost=175.18..175.37 rows=10 width=12)
Group Key: task_group_id
-> Sort (cost=175.18..175.21 rows=11 width=4)
Sort Key: task_group_id
-> Seq Scan on tbl_tasks (cost=0.00..174.99 rows=11 width=4)
Filter: ((parent_id IS NULL) AND (status = 0) AND (task_group_id = ANY ('{201,200,199,198,197,196,195,189,188,187,94,90,88,87,85,83,79,78,74}'::integer[])))