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CompressionMetadata

graphos_core::storage::codec

Enum CompressionMetadata

pub enum CompressionMetadata {
    None,
    Delta {
        base: i64,
    },
    BitPacked {
        count: usize,
    },
    DeltaBitPacked {
        base: i64,
        count: usize,
    },
    Dictionary {
        dict_id: u32,
    },
    RunLength {
        run_count: usize,
    },
}

Expand description

Metadata needed for decompression.

Variants§

None

No metadata needed.

Delta

Delta encoding metadata.

Fields

§base: i64

Base value (first value in sequence).

BitPacked

Bit-packing metadata.

Fields

§count: usize

Number of values.

DeltaBitPacked

Delta + bit-packing metadata.

Fields

§base: i64

Base value.

§count: usize

Number of values.

Dictionary

Dictionary metadata.

Fields

§dict_id: u32

Dictionary identifier (for shared dictionaries).

RunLength

Run-length metadata.

Fields

§run_count: usize

Number of runs.

Trait Implementations§

impl Clone for CompressionMetadata

fn clone(&self) -> CompressionMetadata

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Debug for CompressionMetadata

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for CompressionMetadata

impl RefUnwindSafe for CompressionMetadata

impl Send for CompressionMetadata

impl Sync for CompressionMetadata

impl Unpin for CompressionMetadata

impl UnwindSafe for CompressionMetadata

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

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

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

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> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

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

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

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

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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.

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

Performs the conversion.