Function Sub32to64WithOverflow

postgres/parser/utils/arith.go:73–78

Sub32to64WithOverflow returns a-b. If ok is false, b was outside the int32 range or a-b overflowed.

(a int32, b int64)

// Sub32to64WithOverflow returns a-b. If ok is false, b was outside the
// int32 range or a-b overflowed.
func Sub32to64WithOverflow(a int32, b int64) (r int32, ok bool) {
	if b > math.MaxInt32 || b < math.MinInt32 {
		return 0, false
	}
	return Sub32WithOverflow(a, int32(b))
}

// Sub32WithOverflow returns a-b. If ok is false, a-b overflowed.
func Sub32WithOverflow(a, b int32) (r int32, ok bool) {