diesel::sql_types

Struct CChar

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pub struct CChar;
Available on crate feature postgres_backend only.
Expand description

The "char" SQL type. This is a PostgreSQL specific type. Used for e.g. setweight. Do not use in user tables.

§ToSql impls

§FromSql impls

Trait Implementations§

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impl<'__expr, '__expr2> AsExpression<CChar> for &'__expr2 &'__expr u8

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type Expression = Bound<CChar, &'__expr2 &'__expr u8>

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl<'__expr> AsExpression<CChar> for &'__expr u8

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type Expression = Bound<CChar, &'__expr u8>

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl AsExpression<CChar> for u8

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type Expression = Bound<CChar, u8>

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl Clone for CChar

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fn clone(&self) -> CChar

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 CChar

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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 CChar

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fn default() -> CChar

Returns the “default value” for a type. Read more
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impl FromSql<CChar, Pg> for u8

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fn from_sql(bytes: PgValue<'_>) -> Result<Self>

See the trait documentation.
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fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values. Read more
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impl HasSqlType<CChar> for Pg

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fn metadata(_: &mut Self::MetadataLookup) -> PgTypeMetadata

Fetch the metadata for the given type Read more
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impl QueryId for CChar

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const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type? Read more
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type QueryId = CChar

A type which uniquely represents Self in a SQL query. Read more
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fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more
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impl SqlType for CChar

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type IsNull = NotNull

Is this type nullable? Read more
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impl ToSql<CChar, Pg> for u8

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fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> Result

See the trait documentation.
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impl Copy for CChar

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impl SingleValue for CChar

Auto Trait Implementations§

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impl Freeze for CChar

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impl RefUnwindSafe for CChar

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impl Send for CChar

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impl Sync for CChar

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impl Unpin for CChar

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impl UnwindSafe for CChar

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,

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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,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<ST, U, DB> CompatibleType<U, DB> for ST
where DB: Backend, ST: SqlType + SingleValue, U: FromSqlRow<ST, DB>,

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type SqlType = ST

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> IntoNotNullable for T
where T: SqlType<IsNull = NotNull>,

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type NotNullable = T

The not nullable representation of this type. Read more
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impl<T> IntoNullable for T
where T: SqlType<IsNull = NotNull> + SingleValue,

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type Nullable = Nullable<T>

The nullable representation of this type. Read more
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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,

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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)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T

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impl<ST> TypedExpressionType for ST
where ST: SingleValue,