-> Index Scan using companies_company_pkey on companies_company (cost=0.14..0.26 rows=1 width=408)
Index Cond: (id = employees_employee.company_id)
-> Index Scan using common_currency_code_d8d55c3e_like on common_currency (cost=0.14..0.27 rows=1 width=172)
Index Cond: ((code)::text = (companies_company.currency_id)::text)
-> Index Scan using employees_group_pkey on employees_group (cost=0.14..0.25 rows=1 width=124)
Index Cond: (id = employees_employee.group_id)
-> Index Scan using companies_company_pkey on companies_company t8 (cost=0.14..0.31 rows=1 width=408)
Index Cond: (id = employees_group.company_id)
-> Index Scan using common_currency_code_d8d55c3e_like on common_currency t9 (cost=0.14..0.27 rows=1 width=172)
Index Cond: ((code)::text = (t8.currency_id)::text)
-> Index Scan using employees_employee_pkey on employees_employee t10 (cost=0.27..0.29 rows=1 width=149)
Index Cond: (id = orders_order.employee_id)
-> Index Scan using companies_company_pkey on companies_company t11 (cost=0.14..0.26 rows=1 width=408)
Index Cond: (id = t10.company_id)
-> Index Scan using common_currency_code_d8d55c3e_like on common_currency t12 (cost=0.14..0.27 rows=1 width=172)
Index Cond: ((code)::text = (t11.currency_id)::text)
-> Index Scan using employees_group_pkey on employees_group t13 (cost=0.14..0.25 rows=1 width=124)
Index Cond: (id = t10.group_id)
-> Index Scan using companies_company_pkey on companies_company t14 (cost=0.14..0.31 rows=1 width=408)
Index Cond: (id = t13.company_id)
-> Index Scan using common_currency_code_d8d55c3e_like on common_currency t15 (cost=0.14..0.27 rows=1 width=172)
Index Cond: ((code)::text = (t14.currency_id)::text)
-> Hash Join (cost=1.25..8.62 rows=101 width=580)
Hash Cond: ((t16.currency_id)::text = (t17.code)::text)
-> Seq Scan on companies_company t16 (cost=0.00..7.01 rows=101 width=408)
-> Hash (cost=1.11..1.11 rows=11 width=172)
-> Seq Scan on common_currency t17 (cost=0.00..1.11 rows=11 width=172)
(58 rows)

Коллеги, я не вижу проблему, подскажите, может не заметил?

Выложите в нормальном виде запрос и план, не особо читабельно это