-- 先于新版本 Lastleg 上线执行。历史订单保持海外采购回国内，不改数量、资金或交寄事实。
SET @procurement_direction_ddl = IF(
  (SELECT COUNT(*) FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = DATABASE()
    AND TABLE_NAME = 'll_overseas_procurement_order' AND COLUMN_NAME = 'procurement_direction') = 0,
  'ALTER TABLE ll_overseas_procurement_order ADD COLUMN procurement_direction VARCHAR(32) NOT NULL DEFAULT ''OVERSEAS_TO_DOMESTIC'' COMMENT ''采购方向：海外采购回国内/国内采购发海外''',
  'SELECT 1');
PREPARE procurement_direction_stmt FROM @procurement_direction_ddl;
EXECUTE procurement_direction_stmt;
DEALLOCATE PREPARE procurement_direction_stmt;