QUERY PLAN
GroupAggregate (cost=111.47..111.63 rows=9 width=12)
Group Key: remain_task.task_group_id
-> Sort (cost=111.47..111.49 rows=10 width=4)
Sort Key: remain_task.task_group_id
-> Hash Anti Join (cost=60.30..111.30 rows=10 width=4)
Hash Cond: (remain_task.id = child_task.parent_id)
-> Seq Scan on tbl_tasks remain_task (cost=0.00..50.87 rows=10 width=8)
Filter: ((status <> 1) AND (task_group_id = ANY ('{106,86}'::integer[])))
-> Hash (cost=44.58..44.58 rows=1258 width=4)
-> Seq Scan on tbl_tasks child_task (cost=0.00..44.58 rows=1258 width=4)