Struct ClusteringKey 

pub struct ClusteringKey {
    pub columns: Vec<(String, Value)>,
}

Clustering key with multi-column support

Stores the clustering key as a list of (column name, value) pairs. The order must match the schema’s clustering key definition.

Fields

columns: Vec<(String, Value)>

Column name and value pairs (in schema order)

Implementations

impl ClusteringKey

pub fn new(columns: Vec<(String, Value)>) -> Self

Create a new clustering key

pub fn single(column: impl Into<String>, value: Value) -> Self

Create a clustering key from a single column

pub fn compare(&self, other: &Self, schema: &TableSchema) -> Result<Ordering>

Compare two clustering keys according to schema-defined ordering

Each clustering column can be ASC or DESC. This method requires schema information to determine the correct ordering.

Trait Implementations

impl Clone for ClusteringKey

fn clone(&self) -> ClusteringKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ClusteringKey

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ClusteringKey

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ClusteringKey

impl Ord for ClusteringKey

fn cmp(&self, other: &Self) -> 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 ClusteringKey

fn eq(&self, other: &ClusteringKey) -> 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 ClusteringKey

fn partial_cmp(&self, other: &Self) -> 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 ClusteringKey

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ClusteringKey