QUERY PLAN
Aggregate (cost=33.58..33.59 rows=1 width=8)
-> Sort (cost=32.30..32.51 rows=85 width=218)
Sort Key: s.created_at DESC
-> HashAggregate (cost=28.73..29.58 rows=85 width=218)
Group Key: s.id
-> Hash Right Join (cost=13.69..27.65 rows=432 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=12.74..12.74 rows=76 width=12)
-> Hash Join (cost=5.91..12.74 rows=76 width=12)
Hash Cond: (thrs.task_group_id = s.id)
-> Seq Scan on tbl_task_group_head_of_relationships thrs (cost=0.00..6.62 rows=76 width=4)
Filter: (user_id = 1000)
-> Hash (cost=4.85..4.85 rows=85 width=16)
-> Seq Scan on tbl_task_groups s (cost=0.00..4.85 rows=85 width=16)