Enum HashKey 

pub enum HashKey {
    Null,
    Bool(bool),
    Int64(i64),
    String(String),
    Composite(Vec<HashKey>),
}

A hash key that can be hashed and compared for join operations.

Variants

Null

Null key.

Bool(bool)

Boolean key.

Int64(i64)

Integer key.

String(String)

String key (using the string content for hashing).

Composite(Vec<HashKey>)

Composite key for multi-column joins.

Implementations

impl HashKey

pub fn from_value(value: &Value) -> Self

Creates a hash key from a Value.

pub fn from_column(column: &ValueVector, row: usize) -> Option<Self>

Creates a hash key from a column value at a given row.

Trait Implementations

impl Clone for HashKey

fn clone(&self) -> HashKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HashKey

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

Formats the value using the given formatter.

impl Hash for HashKey

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 for HashKey

fn eq(&self, other: &HashKey) -> 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 Eq for HashKey

impl StructuralPartialEq for HashKey