QUERY PLAN
Limit (cost=47.98..48.01 rows=10 width=384)
-> Sort (cost=47.98..48.04 rows=24 width=384)
Sort Key: s.created_at DESC
-> HashAggregate (cost=47.04..47.46 rows=24 width=384)
Group Key: s.id
-> Hash Right Join (cost=39.77..46.98 rows=24 width=364)
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=39.69..39.69 rows=6 width=364)
-> Hash Join (cost=30.44..39.69 rows=6 width=364)
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=30.26..30.26 rows=14 width=364)
-> Hash Join (cost=17.06..30.26 rows=14 width=364)
Hash Cond: (s.head_of = u.id)
-> Seq Scan on tbl_task_groups s (cost=0.00..12.94 rows=94 width=364)
-> Hash (cost=16.80..16.80 rows=21 width=4)
-> Seq Scan on tbl_users u (cost=0.00..16.80 rows=21 width=4)
Filter: (department_id = 2)