Method Compare

pkg/sql/sem/tree/datum.go:2941–2967

Compare implements the Datum interface.

(ctx *EvalContext, other Datum)

// Compare implements the Datum interface.
func (d *DTuple) Compare(ctx *EvalContext, other Datum) int {
	if other == DNull {
		// NULL is less than any non-NULL value.
		return 1
	}
	v, ok := UnwrapDatum(ctx, other).(*DTuple)
	if !ok {
		panic(makeUnsupportedComparisonMessage(d, other))
	}
	n := len(d.D)
	if n > len(v.D) {
		n = len(v.D)
	}
	for i := 0; i < n; i++ {
		c := d.D[i].Compare(ctx, v.D[i])
		if c != 0 {
			return c
		}
	}
	if len(d.D) < len(v.D) {
		return -1
	}
	if len(d.D) > len(v.D) {
		return 1
	}
	return 0
}

// Prev implements the Datum interface.
func (d *DTuple) Prev(ctx *EvalContext) (Datum, bool) {