-- ============================================================================
-- 订单退款 / 回收所购服务：补充列（幂等，可重复执行）
--
-- 本迁移与 internal/logic/migrate.go 的 migrateColumns() 内容一致：
-- 服务端启动时 Migrate() 会自动加列（项目约定：升级只需重启服务）。
-- 本文件供运维在无法重启 / 需要手工核对时使用。
--
-- 新增列：
--   member_orders.service_revoked  退款时是否已回收所购服务：0未回收 1已回收
--   member_orders.refunded_at      退款时间
-- ============================================================================

SET @db := DATABASE();

SET @sql := (
  SELECT IF(COUNT(*) = 0,
    'ALTER TABLE `member_orders` ADD COLUMN `service_revoked` tinyint NOT NULL DEFAULT 0 COMMENT ''退款时是否已回收所购服务：0未回收 1已回收''',
    'SELECT ''member_orders.service_revoked already exists'' AS msg')
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'member_orders' AND COLUMN_NAME = 'service_revoked'
);
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @sql := (
  SELECT IF(COUNT(*) = 0,
    'ALTER TABLE `member_orders` ADD COLUMN `refunded_at` datetime DEFAULT NULL COMMENT ''退款时间''',
    'SELECT ''member_orders.refunded_at already exists'' AS msg')
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'member_orders' AND COLUMN_NAME = 'refunded_at'
);
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;