Struct UniqueConstraint 

pub struct UniqueConstraint {
    pub terms: Vec<String>,
    pub partial: Option<String>,
}

A unique constraint’s ordered terms and optional partial predicate (Appendix B.5). Column terms use their names; expression terms retain their SQL text.

Fields

terms: Vec<String>

Column names or expression text, in declaration order.

partial: Option<String>

The WHERE expression as written for a partial unique index.

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<const N: usize> From<[&str; N]> for UniqueConstraint

fn from(terms: [&str; N]) -> Self

Converts to this type from the input type.

impl Hash for UniqueConstraint

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 UniqueConstraint

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

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

fn partial_cmp(&self, other: &UniqueConstraint) -> 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 Eq for UniqueConstraint

impl StructuralPartialEq for UniqueConstraint