-- prc_order_bill: transfer_no + customer/credit status flags
-- customer_active_status: ACTIVE / MISSING / DISABLED
-- credit_arrears_status: NORMAL / ARREARS
SET NAMES utf8mb4;

ALTER TABLE prc_order_bill
  ADD COLUMN transfer_no VARCHAR(64) DEFAULT NULL COMMENT '转单号' AFTER tracking_no,
  ADD COLUMN customer_active_status VARCHAR(20) DEFAULT NULL COMMENT '客户生效状态：ACTIVE正常 MISSING不存在 DISABLED停用' AFTER ar_bill_status,
  ADD COLUMN credit_arrears_status VARCHAR(20) DEFAULT NULL COMMENT '额度欠费状态：NORMAL正常 ARREARS欠费' AFTER customer_active_status,
  ADD KEY idx_order_bill_transfer_no (transfer_no),
  ADD KEY idx_order_bill_customer_active (customer_active_status),
  ADD KEY idx_order_bill_credit_arrears (credit_arrears_status);