Struct UniqueConstraint 

pub struct UniqueConstraint {
    pub schema: Cow<'static, str>,
    pub table: Cow<'static, str>,
    pub name: Cow<'static, str>,
    pub name_explicit: bool,
    pub columns: Cow<'static, [Cow<'static, str>]>,
    pub nulls_not_distinct: bool,
    pub deferrable: bool,
    pub initially_deferred: bool,
}

Runtime unique constraint entity

Uses Cow<'static, str> for all string fields, which works with both:

• Borrowed data from const definitions (Cow::Borrowed)
• Owned data from deserialization/introspection (Cow::Owned)

Fields

schema: Cow<'static, str>

Schema name

table: Cow<'static, str>

Parent table name

name: Cow<'static, str>

Constraint name

name_explicit: bool

Whether the constraint name was explicitly specified

columns: Cow<'static, [Cow<'static, str>]>

Columns in the unique constraint

nulls_not_distinct: bool

NULLS NOT DISTINCT flag (PostgreSQL 15+)

deferrable: bool

Whether the constraint is DEFERRABLE

initially_deferred: bool

Whether the constraint is INITIALLY DEFERRED

Implementations

impl UniqueConstraint

pub fn to_constraint_sql(&self) -> String

Generate the UNIQUE constraint clause

pub fn add_unique_sql(&self) -> String

Generate ADD UNIQUE SQL

pub fn drop_unique_sql(&self) -> String

Generate DROP UNIQUE SQL

impl UniqueConstraint

pub fn new( schema: impl Into<Cow<'static, str>>, table: impl Into<Cow<'static, str>>, name: impl Into<Cow<'static, str>>, columns: impl Into<Cow<'static, [Cow<'static, str>]>>, ) -> Self

Create a new unique constraint

pub fn from_strings( schema: String, table: String, name: String, columns: Vec<String>, ) -> Self

Create a new unique constraint from owned strings (convenience for runtime construction)

pub fn schema(&self) -> &str

Get the schema name

pub fn name(&self) -> &str

Get the constraint name

pub fn table(&self) -> &str

Get the table name

pub const fn explicit_name(self) -> Self

Mark the name as explicitly specified

pub const fn deferrable(self) -> Self

Mark the constraint DEFERRABLE.

pub const fn initially_deferred(self) -> Self

Mark the constraint DEFERRABLE INITIALLY DEFERRED.

Trait Implementations

impl Clone for UniqueConstraint

fn clone(&self) -> UniqueConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UniqueConstraint

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

Formats the value using the given formatter.

impl Default for UniqueConstraint

fn default() -> Self

Returns the “default value” for a type.

impl Eq for UniqueConstraint

impl From<UniqueConstraintDef> for UniqueConstraint

fn from(def: UniqueConstraintDef) -> Self

Converts to this type from the input type.

impl PartialEq for UniqueConstraint

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UniqueConstraint