YashanDB Python驱动会对YashanDB数据类型进行转换，转换关系如下：

• 绑定输入

  Python Type	YashanDB Type
  int	BigInt
  bytes	Raw
  bool	Boolean
  datetime.date	Date
  float	Double
  datetime.timedelta	INTERVAL DAY TO SECOND
  datetime.time	Time
  datetime.datetime	TimeStamp
  str	Varchar
  decimal.Decimal	Varchar

• 查询输出

  YashanDB Type	Python Type
  Boolean	bool
  TinyInt	int
  SmallInt	int
  Int	int
  BigInt	int
  Float	float
  Double	float
  Number	decimal.Decimal
  Date	datetime.date
  Time	datetime.time
  TimeStamp	datetime.datetime
  Char/Varchar	str
  Raw	bytes
  RowId	str
  URowId	str
  Clob	str
  Blob	bytes
  Bit	str
  INTERVAL DAY TO SECOND	datetime.timedelta
  INTERVAL YEAR TO MONTH	str