QUERY PLAN
Delete on tbl_sales_contract_remind_receivers (cost=0.28..57.88 rows=1 width=12)
-> Nested Loop (cost=0.28..57.88 rows=1 width=12)
-> Seq Scan on tbl_sales_contract_remind_receivers (cost=0.00..44.24 rows=1 width=10)
Filter: (user_id IS NULL)
-> Index Scan using tbl_sales_contracts_pkey on tbl_sales_contracts (cost=0.28..8.30 rows=1 width=10)
Index Cond: (id = tbl_sales_contract_remind_receivers.contract_id)
Filter: (client_id = 583)