Enum PgNullability 

pub enum PgNullability {
    Nullable,
    NotNull,
}

PostgreSQL column nullability labels.

Variants

Nullable

The column accepts null values.

NotNull

The column is marked NOT NULL.

Implementations

impl PgNullability

pub const fn is_nullable(self) -> bool

Returns true when the column accepts null values.

pub const fn as_str(self) -> &'static str

Returns a stable label.

Trait Implementations

impl Clone for PgNullability

fn clone(&self) -> PgNullability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PgNullability

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

Formats the value using the given formatter.

impl Default for PgNullability

fn default() -> PgNullability

Returns the “default value” for a type.

impl Display for PgNullability

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

Formats the value using the given formatter.

impl FromStr for PgNullability

type Err = PgColumnError

The associated error which can be returned from parsing.

fn from_str(input: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for PgNullability

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 PgNullability

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

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

fn partial_cmp(&self, other: &PgNullability) -> 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 PgNullability

impl Eq for PgNullability

impl StructuralPartialEq for PgNullability