Struct datafusion_physical_expr::intervals::interval_aritmetic::Interval

pub struct Interval {
    pub lower: ScalarValue,
    pub upper: ScalarValue,
}

This type represents an interval, which is used to calculate reliable bounds for expressions. Currently, we only support addition and subtraction, but more capabilities will be added in the future. Upper/lower bounds having NULL values indicate an unbounded side. For example; [10, 20], [10, ∞], [-∞, 100] and [-∞, ∞] are all valid intervals.

Fields

lower: ScalarValue

upper: ScalarValue

Implementations

impl Interval

pub fn add<T: Borrow<Interval>>(&self, other: T) -> Result<Interval>

Add the given interval (other) to this interval. Say we have intervals [a1, b1] and [a2, b2], then their sum is [a1 + a2, b1 + b2]. Note that this represents all possible values the sum can take if one can choose single values arbitrarily from each of the operands.

pub fn sub<T: Borrow<Interval>>(&self, other: T) -> Result<Interval>

Subtract the given interval (other) from this interval. Say we have intervals [a1, b1] and [a2, b2], then their sum is [a1 - b2, b1 - a2]. Note that this represents all possible values the difference can take if one can choose single values arbitrarily from each of the operands.

Trait Implementations

impl Clone for Interval

fn clone(&self) -> Interval

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Interval

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Interval

fn default() -> Self

Returns the “default value” for a type.

impl Display for Interval

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for Interval

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<Interval> for Interval

fn eq(&self, other: &Interval) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Interval

impl StructuralEq for Interval

impl StructuralPartialEq for Interval