// DecodeDecimal decodes bytes to decimal.
func DecodeDecimal(b []byte) ([]byte, types.Datum, error) {
var d types.Datum
if len(b) < 3 {
return b, d, errors.New("insufficient bytes to decode value")
}
precision := int(b[0])
frac := int(b[1])
b = b[2:]
dec := new(types.MyDecimal)
binSize, err := dec.FromBin(b, precision, frac)
b = b[binSize:]
if err != nil {
return b, d, errors.Trace(err)
}
d.SetLength(precision)
d.SetFrac(frac)
d.SetMysqlDecimal(dec)
return b, d, nil
}
