fn read_buffer(
buf: &Buffer,
a_data: &Buffer,
compression_codec: Option<CompressionCodec>,
) -> Result<Buffer, ArrowError>Expand description
Read a buffer based on offset and length From https://github.com/apache/arrow/blob/6a936c4ff5007045e86f65f1a6b6c3c955ad5103/format/Message.fbs#L58 Each constituent buffer is first compressed with the indicated compressor, and then written with the uncompressed length in the first 8 bytes as a 64-bit little-endian signed integer followed by the compressed buffer bytes (and then padding as required by the protocol). The uncompressed length may be set to -1 to indicate that the data that follows is not compressed, which can be useful for cases where compression does not yield appreciable savings.