Enum odbc_api::handles::Nullability

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pub enum Nullability {
    Unknown,
    Nullable,
    NoNulls,
}

Expand description

Indication of whether a column is nullable or not.

Variants

`Unknown`

Indicates that we do not know whether the column is Nullable or not.

`Nullable`

The column may hold NULL values.

`NoNulls`

The column can not hold NULL values.

Implementations

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impl Nullability

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pub fn new(nullability: Nullability) -> Self

Construct a new instance from a Nullability new type constant.

Trait Implementations

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impl Clone for Nullability

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fn clone(&self) -> Nullability

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

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impl Debug for Nullability

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

Formats the value using the given formatter. Read more

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impl Default for Nullability

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl Hash for Nullability

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

Feeds this value into the given Hasher. Read more

1.3.0 · source

fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,

Feeds a slice of this type into the given Hasher. Read more

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impl PartialEq<Nullability> for Nullability

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

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

1.0.0 · source

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

This method tests for !=.

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impl StructuralPartialEq for Nullability

Auto Trait Implementations

impl RefUnwindSafe for Nullability

impl Send for Nullability

impl Sync for Nullability

impl Unpin for Nullability

impl UnwindSafe for Nullability

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Enum odbc_api::handles::Nullability

Variants

Unknown

Nullable

NoNulls

Implementations

impl Nullability

pub fn new(nullability: Nullability) -> Self

Trait Implementations

impl Clone for Nullability

fn clone(&self) -> Nullability

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

impl Debug for Nullability

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

impl Default for Nullability

fn default() -> Self

impl Hash for Nullability

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

fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher,

impl PartialEq<Nullability> for Nullability

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

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

impl Copy for Nullability

impl Eq for Nullability

impl StructuralEq for Nullability

impl StructuralPartialEq for Nullability

Auto Trait Implementations

impl RefUnwindSafe for Nullability

impl Send for Nullability

impl Sync for Nullability

impl Unpin for Nullability

impl UnwindSafe for Nullability

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

`Unknown`

`Nullable`

`NoNulls`

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

fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,