Enum AggFunction 

#[non_exhaustive]
pub enum AggFunction {
    Sum,
    Count,
    Min,
    Max,
    Avg,
    First,
    Last,
    CountDistinct,
    Percentile(f64),
    TopK(usize),
}

Supported aggregate functions.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Sum

Count

Min

Max

Avg

First

Last

CountDistinct

Approximate count distinct via HyperLogLog.

Percentile(f64)

Approximate percentile via TDigest. Inner value is the quantile (0.0–1.0).

TopK(usize)

Approximate top-K heavy hitters via SpaceSaving. Inner value is K.

Implementations

impl AggFunction

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

pub fn uses_sketch(&self) -> bool

Whether this function requires sketch state in PartialAggregate.

Trait Implementations

impl Clone for AggFunction

fn clone(&self) -> AggFunction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggFunction

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AggFunction

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for AggFunction

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl PartialEq for AggFunction

fn eq(&self, other: &AggFunction) -> 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 Serialize for AggFunction

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToMessagePack for AggFunction

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

impl StructuralPartialEq for AggFunction