QUERY PLAN
GroupAggregate (cost=123.89..124.17 rows=15 width=12)
Group Key: remain_task.task_group_id
-> Sort (cost=123.89..123.93 rows=17 width=4)
Sort Key: remain_task.task_group_id
-> Hash Anti Join (cost=60.10..123.54 rows=17 width=4)
Hash Cond: (remain_task.id = child_task.parent_id)
-> Seq Scan on tbl_tasks remain_task (cost=0.00..63.23 rows=17 width=8)
Filter: ((status <> 1) AND (task_group_id = ANY ('{139,106,96,94,90,89,88,87,85,84}'::integer[])))
-> Hash (cost=44.49..44.49 rows=1249 width=4)
-> Seq Scan on tbl_tasks child_task (cost=0.00..44.49 rows=1249 width=4)