QUERY PLAN
Aggregate (cost=40.89..40.90 rows=1 width=8)
-> Sort (cost=40.84..40.85 rows=3 width=218)
Sort Key: s.created_at DESC
-> HashAggregate (cost=40.79..40.82 rows=3 width=218)
Group Key: s.id
-> Hash Right Join (cost=28.55..40.63 rows=64 width=12)
Hash Cond: (turs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_user_relationships turs (cost=0.00..7.83 rows=483 width=4)
-> Hash (cost=28.40..28.40 rows=12 width=12)
-> Nested Loop (cost=13.56..28.40 rows=12 width=12)
-> Index Scan using tbl_users_pkey on tbl_users u (cost=0.14..8.16 rows=1 width=4)
Index Cond: (id = 1000)
Filter: (department_id = 10)
-> Hash Right Join (cost=13.42..20.11 rows=12 width=16)
Hash Cond: (thrs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_head_of_relationships thrs (cost=0.00..5.70 rows=370 width=4)
-> Hash (cost=13.38..13.38 rows=3 width=20)
-> Seq Scan on tbl_task_groups s (cost=0.00..13.38 rows=3 width=20)
Filter: ((head_of = 1000) AND (status = '2'::smallint))