-- receipt_url 重命名为 receipt_urls（与代码字段一致）
ALTER TABLE `yz_backend_reimbursement_items`
  CHANGE COLUMN `receipt_url` `receipt_urls` varchar(500) NOT NULL DEFAULT '' COMMENT '票据文件地址，逗号分隔';

ALTER TABLE `yz_backend_reimbursement_items`
  DROP INDEX `idx_receipt_url`;