lance_encoding::encodings::physical::dictionary

Struct BlockDictionaryDecompressor

pub struct BlockDictionaryDecompressor { /* private fields */ }

Expand description

Decodes a framed block dictionary through concrete child codecs.

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impl BlockDictionaryDecompressor

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pub fn try_new( bits_per_value: u64, num_dictionary_items: u32, indices: Box<dyn BlockDecompressor>, items: Box<dyn BlockDecompressor>, ) -> Result<Self>

Creates a bounded dictionary decoder for u32 or u64 values.

Trait Implementations§

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impl BlockDecompressor for BlockDictionaryDecompressor

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fn decompress( &self, data: Option<LanceBuffer>, num_values: u64, ) -> Result<DataBlock>

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fn requires_payload(&self) -> bool

Whether this codec consumes one payload buffer.

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fn infer_num_values(&self, _data: &LanceBuffer) -> Result<Option<u64>>

Inspect a block for an exact payload-derived value count when supported. Read more

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impl Debug for BlockDictionaryDecompressor

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnsafeUnpin for BlockDictionaryDecompressor

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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<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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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> 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 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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