Enum arrow_flight::sql::Nullable

#[repr(i32)]
pub enum Nullable {
    NullabilityNoNulls,
    NullabilityNullable,
    NullabilityUnknown,
}

Variants

NullabilityNoNulls

Indicates that the fields does not allow the use of null values.

NullabilityNullable

Indicates that the fields allow the use of null values.

NullabilityUnknown

Indicates that nullability of the fields can not be determined.

Implementations

impl Nullable

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of Nullable.

pub fn from_i32(value: i32) -> Option<Nullable>

Converts an i32 to a Nullable, or None if value is not a valid variant.

impl Nullable

pub fn as_str_name(&self) -> &'static str

String value of the enum field names used in the ProtoBuf definition.

The values are not transformed in any way and thus are considered stable (if the ProtoBuf definition does not change) and safe for programmatic use.

pub fn from_str_name(value: &str) -> Option<Self>

Creates an enum from field names used in the ProtoBuf definition.

Trait Implementations

impl Clone for Nullable

fn clone(&self) -> Nullable

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Nullable

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

Formats the value using the given formatter.

impl Default for Nullable

fn default() -> Nullable

Returns the “default value” for a type.

impl From<Nullable> for i32

fn from(value: Nullable) -> i32

Converts to this type from the input type.

impl Hash for Nullable

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 Nullable

fn cmp(&self, other: &Nullable) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<Nullable> for Nullable

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<Nullable> for Nullable

fn partial_cmp(&self, other: &Nullable) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Nullable

impl Eq for Nullable

impl StructuralEq for Nullable

impl StructuralPartialEq for Nullable