-- 订单下游对接字段（排货确认渠道时固化，供 itfx 预报/轨迹使用）
ALTER TABLE `t_order`
  ADD COLUMN `DownstreamSupplierCode` VARCHAR(64) NULL COMMENT '下游 API 服务商编码 supplierCode' AFTER `ChannelCode`,
  ADD COLUMN `DownstreamAppKey` VARCHAR(128) NULL COMMENT '下游 itfx 应用 AppKey' AFTER `DownstreamSupplierCode`,
  ADD COLUMN `DownstreamAppId` INT NULL COMMENT '下游 itfx 应用 Id' AFTER `DownstreamAppKey`,
  ADD COLUMN `ChannelForecastCode` VARCHAR(128) NULL COMMENT '渠道预报编码 ForecastCode' AFTER `DownstreamAppId`;