[−][src]Struct parquet::encoding::DeltaBitPackEncoder
Delta bit packed encoder. Consists of a header followed by blocks of delta encoded values binary packed.
Delta-binary-packing:
[page-header] [block 1], [block 2], ... [block N]
Each page header consists of:
[block size] [number of miniblocks in a block] [total value count] [first value]
Each block consists of:
[min delta] [list of bitwidths of miniblocks] [miniblocks]
Current implementation writes values in put
method, multiple calls to put
to
existing block or start new block if block size is exceeded. Calling flush_buffer
writes out all data and resets internal state, including page header.
Supports only INT32 and INT64.
Methods
impl<T: DataType> DeltaBitPackEncoder<T>
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Trait Implementations
impl<T: DataType> Encoder<T> for DeltaBitPackEncoder<T>
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Auto Trait Implementations
impl<T> RefUnwindSafe for DeltaBitPackEncoder<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for DeltaBitPackEncoder<T> where
T: Send,
T: Send,
impl<T> Sync for DeltaBitPackEncoder<T> where
T: Sync,
T: Sync,
impl<T> Unpin for DeltaBitPackEncoder<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for DeltaBitPackEncoder<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> Cast<U> for T where
U: FromCast<T>,
U: FromCast<T>,
fn cast(self) -> U
impl<T> From<T> for T
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impl<T> FromCast<T> for T
fn from_cast(t: T) -> T
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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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>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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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>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
U: TryFrom<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
U: TryFrom<T>,