diesel::dsl

Struct today

Source 
pub struct today;
Expand description

Represents the SQL CURRENT_DATE constant.

Trait Implementations§

Source§

impl<Rhs> Add<Rhs> for today
where Rhs: AsExpression<<<today as Expression>::SqlType as Add>::Rhs>,

Source§

type Output = Add<today, <Rhs as AsExpression<<<today as Expression>::SqlType as Add>::Rhs>>::Expression>

The resulting type after applying the + operator.
Source§

fn add(self, __diesel_internal_rhs: Rhs) -> Self::Output

Performs the + operation. Read more
Source§

impl AsExpression<Nullable<Date>> for today

Source§

type Expression = Coerce<today, Nullable<Date>>

The expression being returned
Source§

fn as_expression(self) -> Self::Expression

Perform the conversion
Source§

impl Clone for today

Source§

fn clone(&self) -> today

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
Source§

impl Debug for today

Source§

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

Formats the value using the given formatter. Read more
Source§

impl Expression for today

Source§

type SqlType = Date

The type that this expression represents in SQL
Source§

impl<DB: Backend> QueryFragment<DB> for today

Source§

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, DB>) -> QueryResult<()>

Walk over this QueryFragment for all passes. Read more
Source§

fn to_sql(&self, out: &mut DB::QueryBuilder, backend: &DB) -> QueryResult<()>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.
Converts this QueryFragment to its SQL representation. Read more
Source§

fn collect_binds<'b>( &'b self, out: &mut DB::BindCollector<'b>, metadata_lookup: &mut DB::MetadataLookup, backend: &'b DB, ) -> QueryResult<()>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.
Serializes all bind parameters in this query. Read more
Source§

fn is_safe_to_cache_prepared(&self, backend: &DB) -> QueryResult<bool>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.
Is this query safe to store in the prepared statement cache? Read more
Source§

fn is_noop(&self, backend: &DB) -> QueryResult<bool>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.
Does walking this AST have any effect?
Source§

impl QueryId for today

Source§

const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type? Read more
Source§

type QueryId = today

A type which uniquely represents Self in a SQL query. Read more
Source§

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more
Source§

impl<Rhs> Sub<Rhs> for today
where Rhs: AsExpression<<<today as Expression>::SqlType as Sub>::Rhs>,

Source§

type Output = Sub<today, <Rhs as AsExpression<<<today as Expression>::SqlType as Sub>::Rhs>>::Expression>

The resulting type after applying the - operator.
Source§

fn sub(self, __diesel_internal_rhs: Rhs) -> Self::Output

Performs the - operation. Read more
Source§

impl<__GroupByClause> ValidGrouping<__GroupByClause> for today

Source§

type IsAggregate = Never

Is this expression aggregate? Read more
Source§

impl<QS> AppearsOnTable<QS> for today
where today: Expression,

Source§

impl Copy for today

Source§

impl<QS> SelectableExpression<QS> for today
where today: AppearsOnTable<QS>,

Auto Trait Implementations§

§

impl Freeze for today

§

impl RefUnwindSafe for today

§

impl Send for today

§

impl Sync for today

§

impl Unpin for today

§

impl UnwindSafe for today

Blanket Implementations§

Source§

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

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T, ST> AsExpression<ST> for T
where T: Expression<SqlType = ST>, ST: SqlType + TypedExpressionType,

Source§

type Expression = T

The expression being returned
Source§

fn as_expression(self) -> T

Perform the conversion
Source§

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

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

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

Source§

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

Mutably borrows from an owned value. Read more
Source§

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

Source§

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
Source§

impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
where Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB> + QueryId,

Source§

fn execute(query: T, conn: &mut Conn) -> Result<usize, Error>

Execute this command
Source§

impl<T> ExpressionMethods for T
where T: Expression, <T as Expression>::SqlType: SingleValue,

Source§

fn eq<T>(self, other: T) -> Eq<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a SQL = expression. Read more
Source§

fn ne<T>(self, other: T) -> NotEq<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a SQL != expression. Read more
Source§

fn eq_any<T>(self, values: T) -> EqAny<Self, T>
where Self::SqlType: SqlType, T: AsInExpression<Self::SqlType>,

Creates a SQL IN statement. Read more
Source§

fn ne_all<T>(self, values: T) -> NeAny<Self, T>
where Self::SqlType: SqlType, T: AsInExpression<Self::SqlType>,

Creates a SQL NOT IN statement. Read more
Source§

fn is_null(self) -> IsNull<Self>

Creates a SQL IS NULL expression. Read more
Source§

fn is_not_null(self) -> IsNotNull<Self>

Creates a SQL IS NOT NULL expression. Read more
Source§

fn gt<T>(self, other: T) -> Gt<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a SQL > expression. Read more
Source§

fn ge<T>(self, other: T) -> GtEq<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a SQL >= expression. Read more
Source§

fn lt<T>(self, other: T) -> Lt<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a SQL < expression. Read more
Source§

fn le<T>(self, other: T) -> LtEq<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Creates a SQL <= expression. Read more
Source§

fn between<T, U>(self, lower: T, upper: U) -> Between<Self, T, U>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>, U: AsExpression<Self::SqlType>,

Creates a SQL BETWEEN expression using the given lower and upper bounds. Read more
Source§

fn not_between<T, U>(self, lower: T, upper: U) -> NotBetween<Self, T, U>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>, U: AsExpression<Self::SqlType>,

Creates a SQL NOT BETWEEN expression using the given lower and upper bounds. Read more
Source§

fn desc(self) -> Desc<Self>

Creates a SQL DESC expression, representing this expression in descending order. Read more
Source§

fn asc(self) -> Asc<Self>

Creates a SQL ASC expression, representing this expression in ascending order. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

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

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.

Source§

impl<T> IntoSql for T

Source§

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
Source§

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
Source§

impl<T> NullableExpressionMethods for T
where T: Expression,

Source§

fn nullable(self) -> Nullable<Self>

Converts this potentially non-null expression into one which is treated as nullable. This method has no impact on the generated SQL, and is only used to allow certain comparisons that would otherwise fail to compile. Read more
Source§

fn assume_not_null(self) -> AssumeNotNull<Self>

Converts this potentially nullable expression into one which will be assumed to be not-null. This method has no impact on the generated SQL, however it will enable you to attempt deserialization of the returned value in a non-Option. Read more
Source§

impl<T> PgExpressionMethods for T
where T: Expression,

Source§

fn is_not_distinct_from<T>(self, other: T) -> IsNotDistinctFrom<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Available on crate feature postgres_backend only.
Creates a PostgreSQL IS NOT DISTINCT FROM expression. Read more
Source§

fn is_distinct_from<T>(self, other: T) -> IsDistinctFrom<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Available on crate feature postgres_backend only.
Creates a PostgreSQL IS DISTINCT FROM expression. Read more
Source§

impl<T> PgTimestampExpressionMethods for T
where T: Expression, <T as Expression>::SqlType: DateTimeLike,

Source§

fn at_time_zone<T>(self, timezone: T) -> AtTimeZone<Self, T>
where T: AsExpression<VarChar>,

Available on crate feature postgres_backend only.
Creates a PostgreSQL “AT TIME ZONE” expression. Read more
Source§

impl<T, DB> QueryFragmentForCachedStatement<DB> for T
where DB: Backend, <DB as Backend>::QueryBuilder: Default, T: QueryFragment<DB>,

Source§

fn construct_sql(&self, backend: &DB) -> Result<String, Error>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.
Convert the query fragment into a SQL string for the given backend
Source§

fn is_safe_to_cache_prepared(&self, backend: &DB) -> Result<bool, Error>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.
Check whether it’s safe to cache the query
Source§

impl<T> SqliteExpressionMethods for T
where T: Expression,

Source§

fn is<T>(self, other: T) -> Is<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Available on crate feature sqlite only.
Creates a Sqlite IS expression. Read more
Source§

fn is_not<T>(self, other: T) -> IsNot<Self, T>
where Self::SqlType: SqlType, T: AsExpression<Self::SqlType>,

Available on crate feature sqlite only.
Creates a Sqlite IS NOT expression. Read more
Source§

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

Source§

type Owned = T

The resulting type after obtaining ownership.
Source§

fn to_owned(&self) -> T

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

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

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

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

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

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

Performs the conversion.
Source§

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

Source§

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

The type returned in the event of a conversion error.
Source§

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

Performs the conversion.
Source§

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

Source§

fn vzip(self) -> V

Source§

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

Source§

impl<T> MaybeSendSync for T

Source§

impl<T> NonAggregate for T
where T: ValidGrouping<()>, <T as ValidGrouping<()>>::IsAggregate: MixedAggregates<No, Output = No>,