Function PgwireFormatFloat

pkg/sql/sem/tree/pgwire_encode.go:204–221

PgwireFormatFloat returns a []byte representing a float according to pgwire encoding. The result is appended to the given buffer.

(
	buf []byte, fl float64, conv sessiondatapb.DataConversionConfig, floatTyp *types.T,
)

// PgwireFormatFloat returns a []byte representing a float according to
// pgwire encoding. The result is appended to the given buffer.
func PgwireFormatFloat(
	buf []byte, fl float64, conv sessiondatapb.DataConversionConfig, floatTyp *types.T,
) []byte {
	// PostgreSQL supports 'Inf' as a valid literal for the floating point
	// special value Infinity, therefore handling the special cases for them.
	// (https://github.com/cockroachdb/cockroachdb-parser/issues/62601)
	if math.IsInf(fl, 1) {
		return append(buf, []byte("Infinity")...)
	} else if math.IsInf(fl, -1) {
		return append(buf, []byte("-Infinity")...)
	} else {
		return strconv.AppendFloat(
			buf, fl, 'g',
			conv.GetFloatPrec(floatTyp),
			int(floatTyp.Width()),
		)
	}
}

func pgwireQuoteStringInTuple(in string) bool {
	return in == "" || tupleQuoteSet.in(in)