USE baiyue_lastleg;

SET @ddl = (SELECT IF(
  EXISTS (
    SELECT 1 FROM information_schema.columns
    WHERE table_schema = DATABASE()
      AND table_name = 'll_warehouse_transfer_pallet'
      AND column_name = 'draft_idempotency_key'
  ),
  'SELECT 1',
  'ALTER TABLE ll_warehouse_transfer_pallet
     MODIFY COLUMN warehouse_pallet_id BIGINT NULL COMMENT ''生成后的海外仓真实托盘ID'',
     MODIFY COLUMN pallet_no VARCHAR(128) NULL COMMENT ''生成后的真实托盘码'',
     MODIFY COLUMN warehouse_location_id BIGINT NULL COMMENT ''生成后的真实库位ID'',
     MODIFY COLUMN warehouse_resource_lock_id BIGINT NULL COMMENT ''生成后的仓储资源锁ID'',
     MODIFY COLUMN completed_at DATETIME(3) NULL COMMENT ''整单打托完成时间'',
     ADD COLUMN draft_idempotency_key VARCHAR(255) NULL COMMENT ''草稿保存幂等键'' AFTER status,
     ADD COLUMN draft_request_hash CHAR(64) NULL COMMENT ''草稿请求摘要'' AFTER draft_idempotency_key,
     ADD COLUMN generate_idempotency_key VARCHAR(255) NULL COMMENT ''新托盘生成幂等键'' AFTER draft_request_hash,
     ADD COLUMN bind_idempotency_key VARCHAR(255) NULL COMMENT ''扫码绑定幂等键'' AFTER generate_idempotency_key,
     ADD COLUMN bound_at DATETIME(3) NULL COMMENT ''扫码确认绑定时间'' AFTER bind_idempotency_key'
));
PREPARE transfer_pallet_lifecycle_stmt FROM @ddl;
EXECUTE transfer_pallet_lifecycle_stmt;
DEALLOCATE PREPARE transfer_pallet_lifecycle_stmt;