-- 问题件 / 已理赔 子状态：pending-待处理 processed-已处理
ALTER TABLE `t_order`
  ADD COLUMN `HandleStatus` VARCHAR(16) NULL DEFAULT 'pending' COMMENT '处理子状态：pending/processed' AFTER `OrderStatus`;

UPDATE `t_order`
  SET `HandleStatus` = 'pending'
  WHERE `HandleStatus` IS NULL
    AND `OrderStatus` IN ('problematic', 'claimed');

UPDATE `t_order`
  SET `HandleStatus` = NULL
  WHERE `OrderStatus` NOT IN ('problematic', 'claimed');