Enum CompressionCodec 

pub enum CompressionCodec {
    None,
    Lz4,
    Lz4Raw,
    Zstd(u8),
    Gzip(u8),
    Brotli(u8),
    Lzo,
    Snappy,
}

Data compression formats

Variants

None

No compression

Lz4

LZ4 single compression frame with content size present

Lz4Raw

LZ4 raw block compression (no frame). Used by Parquet as lz4_raw.

Zstd(u8)

Zstandard single compression frame with content size present. Level range is 0–22, where 0 means default compression level (not no compression). Use CompressionCodec::zstd_default to construct with the default level.

Gzip(u8)

Gzip compression. Level range is 0–9, where 0 means no compression. Use CompressionCodec::gzip_default to construct with the default level.

Brotli(u8)

Brotli compression. Level range is 0–11. Use CompressionCodec::brotli_default to construct with the default level.

Lzo

LZO compression

Snappy

Snappy compression

Implementations

impl CompressionCodec

pub const fn zstd_default() -> Self

Returns a Zstd codec with the default compression level.

pub const fn gzip_default() -> Self

Returns a Gzip codec with the default compression level.

pub const fn brotli_default() -> Self

Returns a Brotli codec with the default compression level.

pub fn name(&self) -> &'static str

Returns the codec name as used in serialization and error messages.

impl CompressionCodec

pub fn suffix(&self) -> Result<&'static str>

Returns the file extension suffix for this compression codec. Returns empty string for None, “.gz” for Gzip.

Errors

Returns an error for Lz4 and Zstd as they are not fully supported.

Trait Implementations

impl Clone for CompressionCodec

fn clone(&self) -> CompressionCodec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompressionCodec

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

Formats the value using the given formatter.

impl Default for CompressionCodec

fn default() -> CompressionCodec

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CompressionCodec

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Display for CompressionCodec

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

Formats the value using the given formatter.

impl PartialEq for CompressionCodec

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for CompressionCodec

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl Copy for CompressionCodec

impl Eq for CompressionCodec

impl StructuralPartialEq for CompressionCodec