Struct diesel::pg::PgTypeMetadata

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pub struct PgTypeMetadata(_);

Available on crate feature postgres_backend only.

Expand description

The OIDs for a SQL type

Implementations

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impl PgTypeMetadata

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pub fn new(type_oid: u32, array_oid: u32) -> Self

Create a new instance of this type based on known constant OIDs.

Please refer to PgMetadataLookup for a way to query OIDs of custom types at run time

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pub fn from_result(r: Result<(u32, u32 ), FailedToLookupTypeError>) -> Self

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Create a new instance of this type based on dynamically lookup informations

This function is usfull for third party crates that may implement a custom postgres connection type and want to bring their own lookup mechanism.

Otherwise refer to PgMetadataLookup for a way to automatically implement the corresponding lookup functionality

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pub fn oid(&self) -> Result<u32, impl Error + Send + Sync>

The OID of T

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pub fn array_oid(&self) -> Result<u32, impl Error + Send + Sync>

The OID of T[]

Trait Implementations

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impl Clone for PgTypeMetadata

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fn clone(&self) -> PgTypeMetadata

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for PgTypeMetadata

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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 Hash for PgTypeMetadata

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

Feeds this value into the given Hasher. Read more

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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<PgTypeMetadata> for PgTypeMetadata

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

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

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

This method tests for !=.

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impl Eq for PgTypeMetadata

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impl StructuralEq for PgTypeMetadata

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impl StructuralPartialEq for PgTypeMetadata

Auto Trait Implementations

impl RefUnwindSafe for PgTypeMetadata

impl Send for PgTypeMetadata

impl Sync for PgTypeMetadata

impl Unpin for PgTypeMetadata

impl UnwindSafe for PgTypeMetadata

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> IntoSql for T

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fn into_sql<T>(self) -> AsExprOf<Self, T> where
Self: AsExpression<T> + Sized,
T: SqlType + TypedExpressionType,

Convert self to an expression for Diesel’s query builder. Read more

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fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T> where
&'a Self: AsExpression<T>,
T: SqlType + TypedExpressionType,

Convert &self to an expression for Diesel’s query builder. Read more

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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.

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impl<V, T> VZip<V> for T where
V: MultiLane<T>,

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Struct diesel::pg::PgTypeMetadata

Implementations

impl PgTypeMetadata

pub fn new(type_oid: u32, array_oid: u32) -> Self

pub fn from_result(r: Result<(u32, u32), FailedToLookupTypeError>) -> Self

pub fn oid(&self) -> Result<u32, impl Error + Send + Sync>

pub fn array_oid(&self) -> Result<u32, impl Error + Send + Sync>

Trait Implementations

impl Clone for PgTypeMetadata

fn clone(&self) -> PgTypeMetadata

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

impl Debug for PgTypeMetadata

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

impl Hash for PgTypeMetadata

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

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

impl PartialEq<PgTypeMetadata> for PgTypeMetadata

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

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

impl Eq for PgTypeMetadata

impl StructuralEq for PgTypeMetadata

impl StructuralPartialEq for PgTypeMetadata

Auto Trait Implementations

impl RefUnwindSafe for PgTypeMetadata

impl Send for PgTypeMetadata

impl Sync for PgTypeMetadata

impl Unpin for PgTypeMetadata

impl UnwindSafe for PgTypeMetadata

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> IntoSql for T

fn into_sql<T>(self) -> AsExprOf<Self, T> where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T> where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

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>

impl<V, T> VZip<V> for T where V: MultiLane<T>,

fn vzip(self) -> V

pub fn from_result(r: Result<(u32, u32 ), FailedToLookupTypeError>) -> Self

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>,

fn into_sql<T>(self) -> AsExprOf<Self, T> where
Self: AsExpression<T> + Sized,
T: SqlType + TypedExpressionType,

fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T> where
&'a Self: AsExpression<T>,
T: SqlType + TypedExpressionType,

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>,

impl<V, T> VZip<V> for T where
V: MultiLane<T>,