Enum BoundCollation 

pub enum BoundCollation {
    Unspecified,
    Binary,
    Named(String),
}

Collation metadata retained by a value bound from an outer query.

This is deliberately tri-state. A physical column with no named collation still has the known Self::Binary collation and therefore wins SQLite’s left-to-right declared-collation precedence. Self::Unspecified is metadata-neutral and is reserved for synthesized values, such as a FULL JOIN ... USING coalesced output, that must not donate a collation.

Variants

Unspecified

The synthesized value does not define a comparison collation.

Binary

The source is known to use SQLite’s default BINARY collation.

Named(String)

The source uses the named collation.

Implementations

impl BoundCollation

pub fn from_declared_name(name: Option<String>) -> Self

Convert schema-level declared metadata into a bound-value collation.

A missing schema declaration means the physical column is known to use BINARY; it does not mean that the bound expression is metadata-neutral.

pub fn as_name(&self) -> Option<&str>

Return the collation name donated to comparison resolution.

Self::Unspecified returns None; both other states return a known collation, including BINARY.

Trait Implementations

impl Clone for BoundCollation

fn clone(&self) -> BoundCollation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BoundCollation

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

Formats the value using the given formatter.

impl Eq for BoundCollation

impl From<Option<String>> for BoundCollation

fn from(name: Option<String>) -> Self

Converts to this type from the input type.

impl PartialEq for BoundCollation

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

Equality operator ==.

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

Inequality operator !=.