-- 为利率定价流程添加业务种类和历史贷款利率字段
ALTER TABLE `loan_pricing_workflow`
  ADD COLUMN `business_type` varchar(20) DEFAULT NULL COMMENT '业务种类' AFTER `loan_purpose`,
  ADD COLUMN `loan_rate_history` varchar(100) DEFAULT NULL COMMENT '历史贷款利率' AFTER `business_type`;
