QUERY PLAN
HashAggregate (cost=124.92..125.29 rows=37 width=12)
Group Key: remain_task.task_group_id
-> Hash Anti Join (cost=60.35..124.68 rows=47 width=4)
Hash Cond: (remain_task.id = child_task.parent_id)
-> Seq Scan on tbl_tasks remain_task (cost=0.00..63.50 rows=48 width=8)
Filter: ((status <> 1) AND (task_group_id = ANY ('{85,84,83,80,79,78,76,75,74,73}'::integer[])))
-> Hash (cost=44.60..44.60 rows=1260 width=4)
-> Seq Scan on tbl_tasks child_task (cost=0.00..44.60 rows=1260 width=4)