Struct database::repository::schema::requirements::columns::star

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pub struct star;

Expand description

Represents table_name.*, which is sometimes needed for efficient count queries. It cannot be used in place of all_columns, and has a SqlType of () to prevent it being used that way

Trait Implementations§

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impl Clone for star

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fn clone(&self) -> star

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 star

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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 Expression for star

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type SqlType = NotSelectable

The type that this expression represents in SQL

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impl<DB: Backend> QueryFragment<DB, NotSpecialized> for starwhere
<table as QuerySource>::FromClause: QueryFragment<DB>,

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

Walk over this QueryFragment for all passes. Read more

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impl QueryId for star

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type QueryId = star

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

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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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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<GB> ValidGrouping<GB> for starwhere
(teams, indexs, description): ValidGrouping<__GB>,

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type IsAggregate = <(teams, indexs, description) as ValidGrouping<__GB>>::IsAggregate

Is this expression aggregate? Read more

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impl AppearsOnTable<table> for star

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impl Copy for star

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impl SelectableExpression<table> for star

Auto Trait Implementations§

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Blanket Implementations§

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

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

Execute this command

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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 Twhere
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) -> Self::Expressionwhere
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) -> <&'a Self as AsExpression<T>>::Expressionwhere
&'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> NullableExpressionMethods for Twhere
T: Expression,

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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

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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

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impl<T> ToOwned for Twhere
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 Twhere
U: Into<T>,

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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<U>>::Error>

Performs the conversion.

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

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

The type returned in the event of a conversion error.

const: unstable · source§

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

Performs the conversion.

Struct database::repository::schema::requirements::columns::star

Trait Implementations§

impl Clone for star

fn clone(&self) -> star

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

impl Debug for star

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

impl Expression for star

type SqlType = NotSelectable

impl<DB: Backend> QueryFragment<DB, NotSpecialized> for starwhere <table as QuerySource>::FromClause: QueryFragment<DB>,

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

impl QueryId for star

type QueryId = star

const HAS_STATIC_QUERY_ID: bool = true

fn query_id() -> Option<TypeId>

impl<__GB> ValidGrouping<__GB> for starwhere (teams, indexs, description): ValidGrouping<__GB>,

type IsAggregate = <(teams, indexs, description) as ValidGrouping<__GB>>::IsAggregate

impl AppearsOnTable<table> for star

impl Copy for star

impl SelectableExpression<table> for star

Auto Trait Implementations§

impl RefUnwindSafe for star

impl Send for star

impl Sync for star

impl Unpin for star

impl UnwindSafe for star

Blanket Implementations§

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> IntoSql for T

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

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

impl<T> NullableExpressionMethods for Twhere T: Expression,

fn nullable(self) -> Nullable<Self>

fn assume_not_null(self) -> AssumeNotNull<Self>

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

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

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

impl<DB: Backend> QueryFragment<DB, NotSpecialized> for starwhere
<table as QuerySource>::FromClause: QueryFragment<DB>,

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

impl<GB> ValidGrouping<GB> for starwhere
(teams, indexs, description): ValidGrouping<__GB>,

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

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

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

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

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

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

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

impl<T> NullableExpressionMethods for Twhere
T: Expression,

impl<T> ToOwned for Twhere
T: Clone,

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

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