-- 揽收明细：补齐运单号/客户单号快照（幂等；列已存在则跳过）
-- 对应实体 PickupOrderLine.ServiceNo / ClientNo
-- 报错 Unknown column 'ServiceNo' in 'field list' 时执行本脚本
-- MySQL 5.7+ / 8.0

SET @db := DATABASE();

-- ServiceNo
SET @col := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db
    AND TABLE_NAME = 't_pickup_order_line'
    AND COLUMN_NAME = 'ServiceNo'
);
SET @sql := IF(
  @col = 0,
  'ALTER TABLE `t_pickup_order_line` ADD COLUMN `ServiceNo` VARCHAR(64) NULL COMMENT ''运单号快照（便于列表）'' AFTER `OrderId`',
  'SELECT ''skip ServiceNo'' AS msg'
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- ClientNo
SET @col := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db
    AND TABLE_NAME = 't_pickup_order_line'
    AND COLUMN_NAME = 'ClientNo'
);
SET @sql := IF(
  @col = 0,
  'ALTER TABLE `t_pickup_order_line` ADD COLUMN `ClientNo` VARCHAR(64) NULL COMMENT ''客户单号快照'' AFTER `ServiceNo`',
  'SELECT ''skip ClientNo'' AS msg'
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- 存量行从订单表回填快照（仅空值）
UPDATE `t_pickup_order_line` pl
INNER JOIN `t_order` o ON o.`Id` = pl.`OrderId`
SET
  pl.`ServiceNo` = IFNULL(NULLIF(pl.`ServiceNo`, ''), o.`ServiceNo`),
  pl.`ClientNo` = IFNULL(NULLIF(pl.`ClientNo`, ''), o.`ClientNo`)
WHERE pl.`IsDeleted` = 0
  AND (pl.`ServiceNo` IS NULL OR pl.`ServiceNo` = '' OR pl.`ClientNo` IS NULL OR pl.`ClientNo` = '');