Method Compare

pkg/sql/sem/tree/datum.go:1411–1424

Compare implements the Datum interface.

(
	ctx context.Context, cmpCtx CompareContext, other Datum,
)

// Compare implements the Datum interface.
func (d *DCollatedString) Compare(
	ctx context.Context, cmpCtx CompareContext, other Datum,
) (int, error) {
	if other == DNull {
		// NULL is less than any non-NULL value.
		return 1, nil
	}
	v, ok := cmpCtx.UnwrapDatum(ctx, other).(*DCollatedString)
	if !ok || !lex.LocaleNamesAreEqual(d.Locale, v.Locale) {
		return 0, makeUnsupportedComparisonMessage(d, other)
	}
	res := bytes.Compare(d.Key, v.Key)
	return res, nil
}

// Prev implements the Datum interface.
func (d *DCollatedString) Prev(ctx context.Context, cmpCtx CompareContext) (Datum, bool) {