Function decodeNonsortingDecimalValue

postgres/parser/encoding/decimal.go:693–711

(dec *apd.Decimal, negExp bool, buf, tmp []byte)

}

func decodeNonsortingDecimalValue(dec *apd.Decimal, negExp bool, buf, tmp []byte) error {
	// Decode the exponent.
	buf, e, err := DecodeUvarintAscending(buf)
	if err != nil {
		return err
	}
	if negExp {
		e = -e
	}

	bi := &dec.Coeff
	bi.SetBytes(buf)

	// Set the decimal's scale.
	nDigits := int(apd.NumDigits(bi))
	exp := int(e) - nDigits
	dec.Exponent = int32(exp)
	return nil
}

func decodeNonsortingDecimalValueWithoutExp(dec *apd.Decimal, buf, tmp []byte) {
	bi := &dec.Coeff