Struct Duration

postgres/parser/duration/duration.go:105–111

A Duration represents a length of time. A duration of "1 month" cannot be represented as a fixed number of nanoseconds because the length of months vary. The same is true for days because of leap seconds. Given a begin or end time to anchor a duration, the nanosecond count can be calculated, but it

// TODO(dan): Until the overflow and underflow handling is fixed, this is only
// useful for durations of < 292 years.
type Duration struct {
	Months int64
	Days   int64
	// nanos is an unexported field so that it cannot be misused by other
	// packages. It should almost always be rounded to the nearest microsecond.
	nanos int64
}

// MakeDuration returns a Duration rounded to the nearest microsecond.
func MakeDuration(nanos, days, months int64) Duration {