-- 海外仓换标字段增量（MySQL 8.0）
-- 目标数据库：baiyue_lastleg
-- 用途：为已有 ll_relabel_item 表补齐 FBA目的仓、箱唛/SKU/组合换标字段。
-- 说明：脚本可重复执行；不会修改或删除业务数据。

CREATE DATABASE IF NOT EXISTS baiyue_lastleg
  DEFAULT CHARACTER SET utf8mb4
  COLLATE utf8mb4_unicode_ci;
USE baiyue_lastleg;

DROP PROCEDURE IF EXISTS _tmp_add_relabel_fields;
DELIMITER $$

CREATE PROCEDURE _tmp_add_relabel_fields()
BEGIN
  IF NOT EXISTS (
    SELECT 1
      FROM information_schema.tables
     WHERE table_schema = DATABASE()
       AND table_name = 'll_relabel_item'
  ) THEN
    SIGNAL SQLSTATE '45000'
      SET MESSAGE_TEXT = 'll_relabel_item 不存在，请先初始化 baiyue_lastleg 基线表';
  END IF;

  IF NOT EXISTS (
    SELECT 1
      FROM information_schema.columns
     WHERE table_schema = DATABASE()
       AND table_name = 'll_relabel_item'
       AND column_name = 'destination_fba_warehouse_code'
  ) THEN
    ALTER TABLE ll_relabel_item
      ADD COLUMN destination_fba_warehouse_code VARCHAR(128) NULL
        COMMENT 'FBA目的仓编码（与海外操作仓分离）';
  END IF;

  IF NOT EXISTS (
    SELECT 1
      FROM information_schema.columns
     WHERE table_schema = DATABASE()
       AND table_name = 'll_relabel_item'
       AND column_name = 'operation_type'
  ) THEN
    ALTER TABLE ll_relabel_item
      ADD COLUMN operation_type VARCHAR(32) NOT NULL DEFAULT 'CARTON_LABEL'
        COMMENT '换标模式：箱唛、SKU或组合换标';
  END IF;

  IF NOT EXISTS (
    SELECT 1
      FROM information_schema.columns
     WHERE table_schema = DATABASE()
       AND table_name = 'll_relabel_item'
       AND column_name = 'sku_relabel_items_json'
  ) THEN
    ALTER TABLE ll_relabel_item
      ADD COLUMN sku_relabel_items_json JSON NULL
        COMMENT '同箱SKU换标子明细快照（数量按件）';
  END IF;
END$$

DELIMITER ;
CALL _tmp_add_relabel_fields();
DROP PROCEDURE IF EXISTS _tmp_add_relabel_fields;

SELECT
  table_schema,
  table_name,
  column_name,
  column_type,
  is_nullable,
  column_default,
  ordinal_position,
  column_comment
FROM information_schema.columns
WHERE table_schema = 'baiyue_lastleg'
  AND table_name = 'll_relabel_item'
  AND column_name IN ('destination_fba_warehouse_code', 'operation_type', 'sku_relabel_items_json')
ORDER BY ordinal_position;