Method Compare

pkg/sql/sem/tree/datum.go:5468–5499

Compare implements the Datum interface.

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

// Compare implements the Datum interface.
func (d *DEnum) Compare(ctx context.Context, cmpCtx CompareContext, other Datum) (int, error) {
	if other == DNull {
		return 1, nil
	}
	v, ok := cmpCtx.UnwrapDatum(ctx, other).(*DEnum)
	if !ok {
		return 0, makeUnsupportedComparisonMessage(d, other)
	}

	// Different enums count as different types.
	if v.EnumTyp.Oid() != d.EnumTyp.Oid() {
		return 0, makeUnsupportedComparisonMessage(d, other)
	}

	// We should never be comparing two different versions of the same enum.
	if v.EnumTyp.TypeMeta.Version != d.EnumTyp.TypeMeta.Version {
		var gist redact.SafeString
		if PlanGistFromCtx != nil {
			// Plan gist, by construction, doesn't contain any PII, so it's a
			// safe string.
			gist = redact.SafeString(PlanGistFromCtx(ctx))
		}
		return 0, errors.AssertionFailedf(
			"comparison of two different versions of enum %s oid %d: versions %d and %d, gist %q",
			d.EnumTyp.SQLStringForError(), errors.Safe(d.EnumTyp.Oid()), d.EnumTyp.TypeMeta.Version,
			v.EnumTyp.TypeMeta.Version, gist,
		)
	}

	res := bytes.Compare(d.PhysicalRep, v.PhysicalRep)
	return res, nil
}

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