Enum common_primitives::parquet::column_compression_codec::ColumnCompressionCodec

pub enum ColumnCompressionCodec {
    Uncompressed,
    Snappy,
    Gzip,
    Lzo,
    Brotli,
    ZSTD,
    Lz4Raw,
}

Compression codecs: https://github.com/apache/parquet-format/blob/master/LogicalTypes.md

Variants

Uncompressed

Uncompressed

Snappy

Snappy, aka Zippy, compression

Gzip

Gzip compression

Lzo

Lempel-Zip-Obenhumer compression: https://en.wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Oberhumer

Brotli

Brotli compression

ZSTD

Zstandard compression: https://en.wikipedia.org/wiki/Zstd

Lz4Raw

Lz4 compression without block headers

Trait Implementations

impl Clone for ColumnCompressionCodec

fn clone(&self) -> ColumnCompressionCodec

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnCompressionCodec

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

Formats the value using the given formatter.

impl Decode for ColumnCompressionCodec

fn decode<__CodecInputEdqy: Input>( __codec_input_edqy: &mut __CodecInputEdqy ) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self> ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Default for ColumnCompressionCodec

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ColumnCompressionCodec

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encode for ColumnCompressionCodec

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy )

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> R

where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl MaxEncodedLen for ColumnCompressionCodec

fn max_encoded_len() -> usize

Upper bound, in bytes, of the maximum encoded size of this item.

impl PartialEq for ColumnCompressionCodec

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ColumnCompressionCodec

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TypeInfo for ColumnCompressionCodec

type Identity = ColumnCompressionCodec

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl EncodeLike for ColumnCompressionCodec

impl Eq for ColumnCompressionCodec

impl StructuralEq for ColumnCompressionCodec

impl StructuralPartialEq for ColumnCompressionCodec