Function arrow2::io::ipc::read::read_batch

pub fn read_batch<R: Read + Seek>(
    reader: &mut R,
    dictionaries: &Dictionaries,
    metadata: &FileMetadata,
    projection: Option<&[usize]>,
    limit: Option<usize>,
    index: usize,
    message_scratch: &mut Vec<u8>,
    data_scratch: &mut Vec<u8>
) -> Result<Chunk<Box<dyn Array>>>

Available on crate feature io_ipc only.

Reads the record batch at position index from the reader.

This function is useful for random access to the file. For example, if you have indexed the file somewhere else, this allows pruning certain parts of the file.

Panics

This function panics iff index >= metadata.blocks.len()