[−]Struct webdev_lib::chemicals::schema::chemical_inventory::columns::star

pub struct star;

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 Copy for star

impl Clone for star

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

Performs copy-assignment from source. Read more

impl Debug for star

impl Expression for star

type SqlType = ()

The type that this expression represents in SQL

impl SelectableExpression<table> for star

impl AppearsOnTable<table> for star

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

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

Auto Trait Implementations

impl Unpin for star

impl Sync for star

impl Send for star

impl UnwindSafe for star

impl RefUnwindSafe for star

Blanket Implementations

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

type Owned = T

The resulting type after obtaining ownership.

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

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

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.

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.

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

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

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

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> 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> Typeable for T where
    T: Any, [src]

fn get_type(&self) -> TypeId[src]

Get the TypeId of this object.

impl<T> Erased for T[src]

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

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

impl<T> SetParameter for T[src]

fn set<T>(&mut self, value: T) -> <T as Parameter<Self>>::Result where
    T: Parameter<Self>, [src]

Sets value as a parameter of self.