QUERY PLAN
Limit (cost=38.44..38.47 rows=10 width=396)
-> Sort (cost=38.44..38.54 rows=38 width=396)
Sort Key: s.created_at DESC
-> HashAggregate (cost=36.96..37.62 rows=38 width=396)
Group Key: s.id
-> Hash Right Join (cost=21.05..35.86 rows=437 width=372)
Hash Cond: (turs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_user_relationships turs (cost=0.00..7.94 rows=494 width=4)
-> Hash (cost=20.04..20.04 rows=81 width=372)
-> Nested Loop (cost=6.61..20.04 rows=81 width=372)
-> Seq Scan on tbl_users u (cost=0.00..8.16 rows=1 width=4)
Filter: ((id = 1000) AND (department_id = 10))
-> Hash Right Join (cost=6.61..11.07 rows=81 width=372)
Hash Cond: (thrs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_head_of_relationships thrs (cost=0.00..3.93 rows=193 width=4)
-> Hash (cost=6.14..6.14 rows=38 width=372)
-> Seq Scan on tbl_task_groups s (cost=0.00..6.14 rows=38 width=372)
Filter: (head_of = 1000)