func (d *Datum) compareMysqlDecimal(dec mysql.Decimal) (int, error) {
switch d.k {
case KindMysqlDecimal:
return d.GetMysqlDecimal().Cmp(dec), nil
case KindString, KindBytes:
dDec, err := mysql.ParseDecimal(d.GetString())
return dDec.Cmp(dec), err
default:
fVal, _ := dec.Float64()
return d.compareFloat64(fVal)
}
}
