Struct RelationKey 

pub struct RelationKey(/* private fields */);

A related-key lookup value.

Keys are normalised to text so that a u64 primary key and the u64 foreign key pointing at it agree, whichever integer width each side’s driver hands back. Two different columns are never compared, so the normalisation cannot conflate unrelated rows.

Implementations

impl RelationKey

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

The key for a column value.

pub fn from_cell(cell: &Cell) -> Self

The key for a value read back out of a row.

pub fn as_str(&self) -> &str

The key as text.

Trait Implementations

impl Clone for RelationKey

fn clone(&self) -> RelationKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RelationKey

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

Formats the value using the given formatter.

impl Display for RelationKey

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

Formats the value using the given formatter.

impl Eq for RelationKey

impl Hash for RelationKey

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 RelationKey

fn cmp(&self, other: &RelationKey) -> 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 RelationKey

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for RelationKey

fn partial_cmp(&self, other: &RelationKey) -> 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 StructuralPartialEq for RelationKey