{
  "name": "order_future",
  "desc": "order_future",
  "columns": {
    "order_id": {
      "type": ["STRING", 20],
      "unique": true
    },
    "contract_name": ["STRING", 20],
    "lever_rate": "FLOAT",
    "amount": "INTEGER",
    "deal_amount": "FLOAT",
    "price": "FLOAT",
    "fee": "FLOAT",
    "side": {
      "type": ["STRING", 8],
      "comment": "买/卖 SELL / BUY"
    },
    "type": {
      "type": ["STRING", 12],
      "comment": "MARKET / LIMIT"
    },
    "status":["STRING", 8],
    "pair": ["STRING", 12],
    "time": "DATE"
  }
}