Struct NamespaceConstraint 

pub struct NamespaceConstraint {
    pub table: String,
    pub index: String,
    pub origin: ConstraintOrigin,
    pub columns: Vec<Option<String>>,
    pub partial: bool,
}

One uniqueness constraint in which namespace participates.

Fields

table: String

index: String

The index backing it. Implicit primary-key indexes are named by SQLite (sqlite_autoindex_<table>_<n>).

origin: ConstraintOrigin

columns: Vec<Option<String>>

Key columns in index order. None is an expression, which has no column name — the shape both hand enumerations were blind to.

partial: bool

A partial index (... WHERE ...). Its constraint binds only the rows its predicate admits, so a collision check that ignores this refuses moves SQLite would have accepted.

Implementations

impl NamespaceConstraint

pub fn columns_are_nameable(&self) -> bool

True when every key column is a plain column name, so a caller can build a collision query from this constraint alone.

Trait Implementations

impl Clone for NamespaceConstraint

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NamespaceConstraint

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

Formats the value using the given formatter.

impl Eq for NamespaceConstraint

impl Ord for NamespaceConstraint

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.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for NamespaceConstraint

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for NamespaceConstraint

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 StructuralPartialEq for NamespaceConstraint