Struct kubos_telemetry_db::telemetry::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

type SqlType = ()

The type that this expression represents in SQL

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

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

Walk over this QueryFragment for all passes. Read more

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

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>

Serializes all bind parameters in this query. Read more

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

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

impl Send for star

impl Sync for star

impl Unpin for star

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,

const: unstable · source

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,

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T where
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.

impl<T> IntoSql for T

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

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>,

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

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

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

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>,

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 T where
U: TryFrom<T>,

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 kubos_telemetry_db::telemetry::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 = ()

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

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

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

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

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

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 T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> IntoSql for T

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

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

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

fn nullable(self) -> Nullable<Self>

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

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

impl<T, U> TryInto<U> for T where 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> for star where
<table as QuerySource>::FromClause: QueryFragment<DB>,

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

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

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

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

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

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

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

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

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

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

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