QUERY PLAN
Aggregate (cost=131.25..131.26 rows=1 width=8)
-> Sort (cost=131.22..131.23 rows=2 width=623)
Sort Key: c.signed_at DESC, c.created_at DESC
-> Group (cost=131.20..131.21 rows=2 width=623)
Group Key: c.id
-> Sort (cost=131.20..131.21 rows=2 width=16)
Sort Key: c.id
-> Nested Loop Left Join (cost=82.86..131.19 rows=2 width=16)
-> Nested Loop Left Join (cost=82.72..130.10 rows=2 width=20)
-> Nested Loop (cost=82.44..129.14 rows=2 width=20)
-> Index Only Scan using tbl_suppliers_pkey on tbl_suppliers supplier (cost=0.28..8.29 rows=1 width=4)
Index Cond: (id = 763)
-> Hash Right Join (cost=82.17..120.83 rows=2 width=24)
Hash Cond: (pcr.contract_id = c.id)
-> Seq Scan on tbl_purchase_client_rels pcr (cost=0.00..33.11 rows=2111 width=8)
-> Hash (cost=82.14..82.14 rows=2 width=20)
-> Seq Scan on tbl_purchase_contracts c (cost=0.00..82.14 rows=2 width=20)
Filter: ((cost_type = ANY ('{1,2}'::integer[])) AND (supplier_id = 763))
-> Index Scan using tbl_clients_pkey on tbl_clients client (cost=0.28..0.48 rows=1 width=8)
Index Cond: (pcr.client_id = id)
-> Index Only Scan using tbl_sales_group_relationships_pkey on tbl_sales_group_relationships sgr (cost=0.14..0.54 rows=1 width=4)
Index Cond: (sales_id = client.sales_rep)