Enum Nullability 

pub enum Nullability {
    Nullable,
    NotNullable,
}

Specifies whether a column allows NULL values.

Example

use hyperdb_api_core::types::Nullability;

let nullable = Nullability::Nullable;
let not_null = Nullability::NotNullable;

assert!(nullable.is_nullable());
assert!(!not_null.is_nullable());

Variants

Nullable

The column allows NULL values.

NotNullable

The column does not allow NULL values.

Implementations

impl Nullability

pub fn is_nullable(&self) -> bool

Returns true if the column is nullable.

Example

use hyperdb_api_core::types::Nullability;

assert!(Nullability::Nullable.is_nullable());
assert!(!Nullability::NotNullable.is_nullable());

pub fn is_not_nullable(&self) -> bool

Returns true if the column is not nullable.

Trait Implementations

impl Clone for Nullability

fn clone(&self) -> Nullability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Nullability

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

Formats the value using the given formatter.

impl Default for Nullability

fn default() -> Nullability

Returns the “default value” for a type.

impl Display for Nullability

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

Formats the value using the given formatter.

impl From<bool> for Nullability

fn from(nullable: bool) -> Nullability

Converts to this type from the input type.

impl Hash for Nullability

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 PartialEq for Nullability

fn eq(&self, other: &Nullability) -> 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 Copy for Nullability

impl Eq for Nullability

impl StructuralPartialEq for Nullability