Struct parquet::data_type::FixedLenByteArray

source ·
pub struct FixedLenByteArray(/* private fields */);
Expand description

Wrapper type for performance reasons, this represents FIXED_LEN_BYTE_ARRAY but in all other considerations behaves the same as ByteArray

§Performance notes:

This type is a little unfortunate, without it the compiler generates code that takes quite a big hit on the CPU pipeline. Essentially the previous version stalls awaiting the result of T::get_physical_type() == Type::FIXED_LEN_BYTE_ARRAY.

Its debatable if this is wanted, it is out of spec for what parquet documents as its base types, although there are code paths in the Rust (and potentially the C++) versions that warrant this.

With this wrapper type the compiler generates more targeted code paths matching the higher level logical types, removing the data-hazard from all decoding and encoding paths.

Methods from Deref<Target = ByteArray>§

source

pub fn len(&self) -> usize

Gets length of the underlying byte buffer.

source

pub fn is_empty(&self) -> bool

Checks if the underlying buffer is empty.

source

pub fn data(&self) -> &[u8]

Returns slice of data.

source

pub fn set_data(&mut self, data: Bytes)

Set data from another byte buffer.

source

pub fn slice(&self, start: usize, len: usize) -> Self

Returns ByteArray instance with slice of values for a data.

source

pub fn as_utf8(&self) -> Result<&str>

Trait Implementations§

source§

impl AsBytes for FixedLenByteArray

source§

fn as_bytes(&self) -> &[u8]

Returns slice of bytes for this data type.
source§

impl AsRef<[u8]> for FixedLenByteArray

source§

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.
source§

impl Clone for FixedLenByteArray

source§

fn clone(&self) -> FixedLenByteArray

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl Debug for FixedLenByteArray

source§

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

Formats the value using the given formatter. Read more
source§

impl Default for FixedLenByteArray

source§

fn default() -> FixedLenByteArray

Returns the “default value” for a type. Read more
source§

impl Deref for FixedLenByteArray

§

type Target = ByteArray

The resulting type after dereferencing.
source§

fn deref(&self) -> &Self::Target

Dereferences the value.
source§

impl DerefMut for FixedLenByteArray

source§

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.
source§

impl Display for FixedLenByteArray

source§

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

Formats the value using the given formatter. Read more
source§

impl From<ByteArray> for FixedLenByteArray

source§

fn from(other: ByteArray) -> Self

Converts to this type from the input type.
source§

impl From<FixedLenByteArray> for ByteArray

source§

fn from(other: FixedLenByteArray) -> Self

Converts to this type from the input type.
source§

impl From<Vec<u8>> for FixedLenByteArray

source§

fn from(buf: Vec<u8>) -> FixedLenByteArray

Converts to this type from the input type.
source§

impl PartialEq<ByteArray> for FixedLenByteArray

source§

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl PartialEq<FixedLenByteArray> for ByteArray

source§

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl PartialEq for FixedLenByteArray

source§

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl PartialOrd<ByteArray> for FixedLenByteArray

source§

fn partial_cmp(&self, other: &ByteArray) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

Tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source§

impl PartialOrd<FixedLenByteArray> for ByteArray

source§

fn partial_cmp(&self, other: &FixedLenByteArray) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

Tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source§

impl PartialOrd for FixedLenByteArray

source§

fn partial_cmp(&self, other: &FixedLenByteArray) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

Tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

Tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source§

impl SliceAsBytes for FixedLenByteArray

source§

fn slice_as_bytes(_self: &[Self]) -> &[u8]

Returns slice of bytes for a slice of this data type.
source§

unsafe fn slice_as_bytes_mut(_self: &mut [Self]) -> &mut [u8]

Return the internal representation as a mutable slice Read more

Auto Trait Implementations§

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

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

source§

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

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

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

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

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

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

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

impl<T> ToString for T
where T: Display + ?Sized,

source§

default fn to_string(&self) -> String

Converts the given value to a String. Read more
source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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.
source§

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

Performs the conversion.
source§

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

source§

fn vzip(self) -> V

source§

impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,