(select max(receipt_progress) from tb_receipt where contract_unid=#{contract_unid})
(select case when max(receipt_progress) is null then 1 else max(receipt_progress)+1 end as receipt_progress from tb_receipt where contract_unid=#{contract_unid})
(select max(reback_progress) from tb_return_info where contract_unid=#{contract_unid}),
(select case when max(reback_progress) is null then 1 else max(reback_progress)+1 end as reback_progress from tb_return_info where contract_unid=#{contract_unid}),