QUERY PLAN
Aggregate (cost=747.98..747.99 rows=1 width=8)
-> Sort (cost=747.95..747.96 rows=2 width=493)
Sort Key: c.signed_at DESC, c.created_at DESC
-> Group (cost=747.93..747.94 rows=2 width=493)
Group Key: c.id
-> Sort (cost=747.93..747.94 rows=2 width=16)
Sort Key: c.id
-> Nested Loop Left Join (cost=106.13..747.92 rows=2 width=16)
-> Nested Loop Left Join (cost=105.99..746.86 rows=2 width=20)
-> Nested Loop (cost=105.71..745.87 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 = 718)
-> Hash Right Join (cost=105.43..737.56 rows=2 width=24)
Hash Cond: (cs.object_id = c.id)
-> Seq Scan on tbl_attachement_relationships cs (cost=0.00..624.51 rows=2027 width=4)
Filter: (object_type = 108)
-> Hash (cost=105.41..105.41 rows=2 width=24)
-> Hash Right Join (cost=70.22..105.41 rows=2 width=24)
Hash Cond: (pcr.contract_id = c.id)
-> Seq Scan on tbl_purchase_client_rels pcr (cost=0.00..30.15 rows=1915 width=8)
-> Hash (cost=70.19..70.19 rows=2 width=20)
-> Seq Scan on tbl_purchase_contracts c (cost=0.00..70.19 rows=2 width=20)
Filter: ((cost_type = ANY ('{1,2}'::integer[])) AND (supplier_id = 718))
-> Index Scan using tbl_clients_pkey on tbl_clients client (cost=0.28..0.49 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..0.52 rows=1 width=4)
Index Cond: (sales_id = client.sales_rep)