QUERY PLAN
Aggregate (cost=48.21..48.22 rows=1 width=8)
-> Sort (cost=47.84..47.90 rows=25 width=218)
Sort Key: s.created_at DESC
-> HashAggregate (cost=47.01..47.26 rows=25 width=218)
Group Key: s.id
-> Hash Right Join (cost=39.73..46.95 rows=25 width=12)
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=39.65..39.65 rows=6 width=12)
-> Hash Join (cost=30.40..39.65 rows=6 width=12)
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=30.24..30.24 rows=13 width=12)
-> Hash Join (cost=17.06..30.24 rows=13 width=12)
Hash Cond: (s.head_of = u.id)
-> Seq Scan on tbl_task_groups s (cost=0.00..12.92 rows=92 width=20)
-> 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)