QUERY PLAN
Limit (cost=37.56..37.57 rows=1 width=389)
-> Sort (cost=37.56..37.57 rows=1 width=389)
Sort Key: s.created_at DESC
-> Group (cost=37.52..37.55 rows=1 width=389)
Group Key: s.id
-> Sort (cost=37.52..37.53 rows=4 width=369)
Sort Key: s.id
-> Nested Loop (cost=20.05..37.48 rows=4 width=369)
-> Index Scan using tbl_users_pkey on tbl_users u (cost=0.14..8.16 rows=1 width=4)
Index Cond: (id = 5248)
Filter: (department_id = 2)
-> Hash Join (cost=19.91..29.28 rows=4 width=369)
Hash Cond: (turs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_user_relationships turs (cost=0.00..9.04 rows=42 width=4)
Filter: (user_id = 1000)
-> Hash (cost=19.86..19.86 rows=4 width=369)
-> Hash Right Join (cost=13.16..19.86 rows=4 width=369)
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=13.15..13.15 rows=1 width=369)
-> Seq Scan on tbl_task_groups s (cost=0.00..13.15 rows=1 width=369)
Filter: (head_of = 5248)