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Grouping

qbrs_core::select

Struct Grouping 

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pub struct Grouping<Scope> { /* private fields */ }
Expand description

A grouping key with its scope requirement discharged — predicate’s counterpart for GROUP BY.

Trait Implementations§

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impl<Scope> Clone for Grouping<Scope>

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl<Scope> GroupBy<Scope, ()> for Grouping<Scope>

Auto Trait Implementations§

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impl<Scope> Freeze for Grouping<Scope>
where PhantomData<fn() -> Scope>: Freeze,

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impl<Scope> RefUnwindSafe for Grouping<Scope>
where PhantomData<fn() -> Scope>: RefUnwindSafe,

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impl<Scope> Send for Grouping<Scope>
where PhantomData<fn() -> Scope>: Send,

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impl<Scope> Sync for Grouping<Scope>
where PhantomData<fn() -> Scope>: Sync,

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impl<Scope> Unpin for Grouping<Scope>
where PhantomData<fn() -> Scope>: Unpin,

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impl<Scope> UnsafeUnpin for Grouping<Scope>
where PhantomData<fn() -> Scope>: UnsafeUnpin,

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impl<Scope> UnwindSafe for Grouping<Scope>
where PhantomData<fn() -> Scope>: UnwindSafe,

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,

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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 T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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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 T
where U: From<T>,

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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<S> Superset<Nil, Nil> for S

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

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WrapNullable<NotNull> for T

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type Output = T