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ColumnEncoding

scirs2_io::formats::orc_lite

Enum ColumnEncoding 

Source 
#[repr(u8)]
pub enum ColumnEncoding {
    Direct = 0,
    Dictionary = 1,
    RleV2 = 2,
    DirectString = 3,
}
Expand description

Column data encoding strategy.

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Direct = 0

Raw values stored directly (8 bytes per element for f64, 8 for i64).

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Dictionary = 1

Dictionary encoding: values replaced by u16 indices into a dictionary.

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RleV2 = 2

ORC integer RLE v2 (delta + base encoding for i64 columns).

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DirectString = 3

UTF-8 length-prefixed strings (variable width).

Trait Implementations§

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impl Clone for ColumnEncoding

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fn clone(&self) -> ColumnEncoding

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 Copy for ColumnEncoding

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impl Debug for ColumnEncoding

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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 Eq for ColumnEncoding

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impl PartialEq for ColumnEncoding

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fn eq(&self, other: &ColumnEncoding) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for ColumnEncoding

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impl<T> Allocation for T
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impl<T> Any for T
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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)
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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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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Calls U::from(self).

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

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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fn named_layer<S>(&self, service: S) -> Layered<<L as Layer<S>>::Service, S>
where L: Layer<S>,

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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

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

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type Output = T

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fn to_subset(&self) -> Option<SS>

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The resulting type after obtaining ownership.
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