{
  "summary": [
    {
      "name": "customer_balance",
      "title": "客户余额缓存",
      "primary": "id",
      "classification": "cache"
    }
  ],
  "fields": [
    {
      "name": "id",
      "type": "VARCHAR(32)",
      "nullable": false,
      "default": "",
      "comment": "主键，即 customer_id"
    },
    {
      "name": "balance",
      "type": "DECIMAL(15,4)",
      "nullable": false,
      "default": 0.0,
      "comment": "当前余额"
    },
    {
      "name": "currency",
      "type": "VARCHAR(8)",
      "nullable": false,
      "default": "CNY",
      "comment": "货币单位"
    },
    {
      "name": "credit_limit",
      "type": "DECIMAL(15,4)",
      "nullable": true,
      "default": null,
      "comment": "信用额度"
    },
    {
      "name": "last_recharge",
      "type": "DATETIME",
      "nullable": true,
      "default": null,
      "comment": "最后充值时间"
    },
    {
      "name": "last_consumption",
      "type": "DATETIME",
      "nullable": true,
      "default": null,
      "comment": "最后消费时间"
    },
    {
      "name": "status",
      "type": "VARCHAR(16)",
      "nullable": false,
      "default": "active",
      "comment": "状态: active/suspended/arrears"
    },
    {
      "name": "sync_version",
      "type": "VARCHAR(32)",
      "nullable": true,
      "default": "",
      "comment": "同步版本号"
    },
    {
      "name": "cached_at",
      "type": "DATETIME",
      "nullable": false,
      "default": "CURRENT_TIMESTAMP",
      "comment": "缓存更新时间"
    }
  ],
  "idxfields": [
    {
      "name": "idx_status",
      "fields": [
        "status"
      ],
      "unique": false
    },
    {
      "name": "idx_balance",
      "fields": [
        "balance"
      ],
      "unique": false
    }
  ],
  "codes": []
}