Module compression

Expand description

Column compression algorithms.

Supports constant, one-value, boolean, integer bitpacking, string dictionary, float, and list delta compression.

Structs§

compress: Compress a byte slice using the given algorithm.
compress_float: Float compression: uses integer bitpacking on delta/offset representations. Format: [value_size: u8][num_values: u32][strategy: u8][payload]
compress_integer_bitpacking: Integer bitpacking compression for a batch of values. Format: [value_size: u8][num_values: u32][packed_values…] Each packed value is [used_bytes: u8][significant_bytes…]
compress_serialized_value: Compress a single serialized value.
decompress: Decompress a chunk back to raw bytes.
decompress_serialized_value: Decompress a single serialized value.
serialized_value_size: Determine the byte size of a serialized primitive value based on its physical type. Used to know how many bytes to expect for compression.