mz_timely_util::containers

Enum Column

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pub enum Column<C: Columnar> {
    Typed(C::Container),
    Bytes(Bytes),
    Align(Region<u64>),
}
Expand description

A container based on a columnar store, encoded in aligned bytes.

The type can represent typed data, bytes from Timely, or an aligned allocation. The name is singular to express that the preferred format is Column::Align. The Column::Typed variant is used to construct the container, and it owns potentially multiple columns of data.

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Typed(C::Container)

The typed variant of the container.

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Bytes(Bytes)

The binary variant of the container.

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Align(Region<u64>)

Relocated, aligned binary data, if Bytes doesn’t work for some reason.

Reasons could include misalignment, cloning of data, or wanting to release the Bytes as a scarce resource.

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impl<C: Columnar> Column<C>

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fn borrow(&self) -> <C::Container as Container<C>>::Borrowed<'_>

Borrows the container as a reference.

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impl<C: Columnar> Clone for Column<C>
where C::Container: Clone,

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fn clone(&self) -> Self

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<C: Columnar> Container for Column<C>

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type ItemRef<'a> = <C as Columnar>::Ref<'a>

The type of elements when reading non-destructively from the container.
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type Item<'a> = <C as Columnar>::Ref<'a>

The type of elements when draining the container.
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type Iter<'a> = IterOwn<<<C as Columnar>::Container as Container<C>>::Borrowed<'a>>

Iterator type when reading from the container.
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type DrainIter<'a> = IterOwn<<<C as Columnar>::Container as Container<C>>::Borrowed<'a>>

Iterator type when draining the container.
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fn len(&self) -> usize

The number of elements in this container Read more
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fn clear(&mut self)

Remove all contents from self while retaining allocated memory. After calling clear, is_empty must return true and len 0.
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fn iter(&self) -> Self::Iter<'_>

Returns an iterator that reads the contents of this container.
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fn drain(&mut self) -> Self::DrainIter<'_>

Returns an iterator that drains the contents of this container. Drain leaves the container in an undefined state.
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fn push<T>(&mut self, item: T)
where Self: PushInto<T>,

Push item into self
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fn is_empty(&self) -> bool

Determine if the container contains any elements, corresponding to len() == 0.
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impl<C: Columnar> ContainerBytes for Column<C>

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fn from_bytes(bytes: Bytes) -> Self

Wrap bytes as Self.
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fn length_in_bytes(&self) -> usize

The number of bytes required to serialize the data.
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fn into_bytes<W: Write>(&self, writer: &mut W)

Writes the binary representation into writer.
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impl<C: Columnar> Default for Column<C>

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<'a, D, T, R, C2> PushInto<&'a mut Column<(D, T, R)>> for Chunker<C2>
where D: Columnar, for<'b> D::Ref<'b>: Ord + Copy, T: Columnar, for<'b> T::Ref<'b>: Ord + Copy, R: Columnar + Semigroup + for<'b> Semigroup<R::Ref<'b>>, for<'b> R::Ref<'b>: Ord, C2: Container + for<'b> PushInto<&'b (D, T, R)>,

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fn push_into(&mut self, container: &'a mut Column<(D, T, R)>)

Push item into self.
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impl<C: Columnar, T> PushInto<T> for Column<C>
where C::Container: Push<T>,

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fn push_into(&mut self, item: T)

Push item into self.

Auto Trait Implementations§

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impl<C> Freeze for Column<C>
where <C as Columnar>::Container: Freeze,

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impl<C> !RefUnwindSafe for Column<C>

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impl<C> Send for Column<C>
where <C as Columnar>::Container: Send,

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impl<C> !Sync for Column<C>

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impl<C> Unpin for Column<C>
where <C as Columnar>::Container: Unpin,

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impl<C> !UnwindSafe for Column<C>

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, U> CastInto<U> for T
where U: CastFrom<T>,

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fn cast_into(self) -> U

Performs the cast.
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impl<T> CloneToUninit for T
where T: Clone,

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

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CopyAs<T> for T

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fn copy_as(self) -> T

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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> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.
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impl<T> FutureExt for T

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fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<'a, S, T> Semigroup<&'a S> for T
where T: Semigroup<S>,

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fn plus_equals(&mut self, rhs: &&'a S)

The method of std::ops::AddAssign, for types that do not implement AddAssign.
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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 = Infallible

The type returned in the event of a conversion error.
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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>,

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

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> Data for T
where T: Clone + 'static,