Struct ConstraintCharacteristics

pub struct ConstraintCharacteristics {
    pub deferrable: Option<bool>,
    pub initially: Option<DeferrableInitial>,
    pub enforced: Option<bool>,
}

<constraint_characteristics> = [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] [ ENFORCED | NOT ENFORCED ]

Used in UNIQUE and foreign key constraints. The individual settings may occur in any order.

Fields

deferrable: Option<bool>

[ DEFERRABLE | NOT DEFERRABLE ]

initially: Option<DeferrableInitial>

[ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]

enforced: Option<bool>

[ ENFORCED | NOT ENFORCED ]

Trait Implementations

impl Clone for ConstraintCharacteristics

fn clone(&self) -> ConstraintCharacteristics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ConstraintCharacteristics

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

Formats the value using the given formatter.

impl Display for ConstraintCharacteristics

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

Formats the value using the given formatter.

impl Hash for ConstraintCharacteristics

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

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 ConstraintCharacteristics

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

fn eq(&self, other: &ConstraintCharacteristics) -> 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 ConstraintCharacteristics

fn partial_cmp(&self, other: &ConstraintCharacteristics) -> 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 Copy for ConstraintCharacteristics

impl Eq for ConstraintCharacteristics

impl StructuralPartialEq for ConstraintCharacteristics