Struct leetcode_cli::cache::schemas::problems::columns::star[−][src]

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

impl Clone for star[src]

fn clone(&self) -> star[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for star[src]

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

Formats the value using the given formatter. Read more

impl Expression for star[src]

type SqlType = ()

The type that this expression represents in SQL

impl<DB: Backend> QueryFragment<DB> for star where
    <table as QuerySource>::FromClause: QueryFragment<DB>, [src]

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

Walk over this QueryFragment for all passes. Read more

fn to_sql(&self, out: &mut <DB as Backend>::QueryBuilder) -> Result<(), Error>[src]

Converts this QueryFragment to its SQL representation. Read more

fn collect_binds(
    &self,
    out: &mut <DB as Backend>::BindCollector,
    metadata_lookup: &<DB as TypeMetadata>::MetadataLookup
) -> Result<(), Error>[src]

Serializes all bind parameters in this query. Read more

fn is_safe_to_cache_prepared(&self) -> Result<bool, Error>[src]

Is this query safe to store in the prepared statement cache? Read more

impl AppearsOnTable<table> for star[src]

impl Copy for star[src]

impl SelectableExpression<table> for star[src]

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 T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T> Instrument for T[src]

fn instrument(self, span: Span) -> Instrumented<Self>[src]

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>[src]

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T> Instrument for T[src]

fn instrument(self, span: Span) -> Instrumented<Self>[src]

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>[src]

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> IntoSql for T[src]

fn into_sql<T>(self) -> Self::Expression where
    Self: AsExpression<T>, [src]

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

fn as_sql<'a, T>(&'a self) -> <&'a Self as AsExpression<T>>::Expression where
    &'a Self: AsExpression<T>, [src]

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

impl<T> NullableExpressionMethods for T where
    T: Expression, [src]

fn nullable(self) -> Nullable<Self>[src]

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

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

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

pub fn clone_into(&self, target: &mut T)[src]

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

recently added

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

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

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

The type returned in the event of a conversion error.

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

Performs the conversion.

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

pub fn vzip(self) -> V