Enum AggregationPhase

#[repr(i32)]
pub enum AggregationPhase {
    Unspecified = 0,
    InitialToIntermediate = 1,
    IntermediateToIntermediate = 2,
    InitialToResult = 3,
    IntermediateToResult = 4,
}

Describes which part of an aggregation or window function to perform within the context of distributed algorithms.

Variants

Unspecified = 0

Implies INTERMEDIATE_TO_RESULT.

InitialToIntermediate = 1

Specifies that the function should be run only up to the point of generating an intermediate value, to be further aggregated later using INTERMEDIATE_TO_INTERMEDIATE or INTERMEDIATE_TO_RESULT.

IntermediateToIntermediate = 2

Specifies that the inputs of the aggregate or window function are the intermediate values of the function, and that the output should also be an intermediate value, to be further aggregated later using INTERMEDIATE_TO_INTERMEDIATE or INTERMEDIATE_TO_RESULT.

InitialToResult = 3

A complete invocation: the function should aggregate the given set of inputs to yield a single return value. This style must be used for aggregate or window functions that are not decomposable.

IntermediateToResult = 4

Specifies that the inputs of the aggregate or window function are the intermediate values of the function, generated previously using INITIAL_TO_INTERMEDIATE and possibly INTERMEDIATE_TO_INTERMEDIATE calls. This call should combine the intermediate values to yield the final return value.

Implementations

impl AggregationPhase

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of AggregationPhase.

pub fn from_i32(value: i32) -> Option<AggregationPhase>

👎Deprecated: Use the TryFrom<i32> implementation instead

Converts an i32 to a AggregationPhase, or None if value is not a valid variant.

impl AggregationPhase

pub fn as_str_name(&self) -> &'static str

String value of the enum field names used in the ProtoBuf definition.

The values are not transformed in any way and thus are considered stable (if the ProtoBuf definition does not change) and safe for programmatic use.

pub fn from_str_name(value: &str) -> Option<Self>

Creates an enum from field names used in the ProtoBuf definition.

Trait Implementations

impl Clone for AggregationPhase

fn clone(&self) -> AggregationPhase

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AggregationPhase

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

Formats the value using the given formatter.

impl Default for AggregationPhase

fn default() -> AggregationPhase

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for AggregationPhase

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<AggregationPhase> for i32

fn from(value: AggregationPhase) -> i32

Converts to this type from the input type.

impl Hash for AggregationPhase

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 Ord for AggregationPhase

fn cmp(&self, other: &AggregationPhase) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for AggregationPhase

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for AggregationPhase

fn partial_cmp(&self, other: &AggregationPhase) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for AggregationPhase

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<i32> for AggregationPhase

type Error = UnknownEnumValue

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<AggregationPhase, UnknownEnumValue>

Performs the conversion.

impl Copy for AggregationPhase

impl Eq for AggregationPhase

impl StructuralPartialEq for AggregationPhase